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4
                                                   The second
                                                   stage of labour

Before you begin this unit, please take the        THE NORMAL SECOND
corresponding test at the end of the book to
assess your knowledge of the subject matter. You   STAGE OF LABOUR
should redo the test after you’ve worked through
the unit, to evaluate what you have learned
                                                   4-1 What is the second stage of labour?
                                                   The second stage of labour starts when the
 Objectives                                        patient’s cervix is fully dilated and ends when
                                                   the infant is completely delivered.
 When you have completed this unit you
 should be able to:                                 The second stage of labour starts when the cervix
 • Identify the onset of the second stage of        is fully dilated.
   labour.
 • Decide when the patient should start to         4-2 What symptoms and signs suggest that
   bear down.                                      the second stage of labour has begun?
 • Communicate effectively with a patient          One or more of the following may occur:
   during labour.                                  1. Uterine contractions increase in both
 • Use the maternal effort to the best                frequency and duration, i.e. they are more
   advantage when the patient bears down.             frequent and last longer.
 • Make careful observations during the            2. The patient becomes restless.
   second stage of labour.                         3. Nausea and vomiting often occur.
                                                   4. The patient has an uncontrollable urge to
 • Accurately evaluate progress in the
                                                      bear down (push).
   second stage of labour.                         5. The perineum bulges during a contraction
 • Manage a patient with a prolonged                  as it is stretched by the fetal head.
   second stage of labour.
                                                   If the symptoms and signs suggest that
 • Diagnose and manage impacted                    the second stage of labour has begun, an
   shoulders.                                      abdominal examination must be done to
                                                   assess the amount of head palpable above the
74    INTRAPAR TUM CARE



pelvic brim, followed by a vaginal examination        4-6 If the cervix is fully dilated but
to assess whether the cervix is fully dilated.        the head not yet engaged, when is it
                                                      safe to wait for engagement before
4-3 Is there a difference between                     allowing the patient to bear down?
primigravidas and multigravidas at the                1. If there are no signs of fetal distress.
start of the second stage of labour?                  2. If there are no signs of cephalopelvic
Yes. In primigravidas the head is usually                disproportion.
engaged when the cervix reaches full
dilatation. In contrast, multigravidas often           Waiting for engagement of the head in a
reach full cervical dilatation when the fetal
                                                       patient with a fully dilated cervix should only be
head is still not engaged.
                                                       allowed if there are no signs of fetal distress or
                                                       cephalopelvic disproportion.
4-4 What is the definition of
engagement of the fetal head?
                                                      Usually primigravidas only reach full cervical
The fetal head is engaged when the largest            dilatation after the fetal head has engaged.
transverse diameter of the head (the biparietal       However the fetal head may only engage after
diameter) has passed through the pelvic inlet.        the cervix is fully dilated in a multigravida.
When the fetal head is engaged, 2/5 or less of        Therefore, there is a greater chance of
the head is palpable above the pelvic brim.           cephalopelvic disproportion in a primigravida
                                                      who reaches full cervical dilatation with an
 The fetal head is engaged when only 2/5 or less of   unengaged fetal head.
 the head is palpable above the brim of the pelvis
                                                      4-7 How long should you wait before asking
                                                      the patient to bear down if the cervix is fully
Engagement usually starts before the onset
                                                      dilated but the head is not yet engaged?
of labour. Initially 5/5 of the head is palpable
above the pelvic brim. Engagement of the head         1. The patient should be assessed after an
cannot be determined on vaginal examination.             hour if there are no signs of fetal distress
                                                         and the maternal observations are normal.
                                                      2. Usually engagement of the head will occur
MANAGING THE SECOND                                      during this time and the patient will feel a
                                                         strong urge to bear down within an hour.
STAGE OF LABOUR                                       3. If the head has still not engaged after an
                                                         hour, you can wait a further hour provided
                                                         that all other observations are normal
4-5 Should the patient start bearing down
                                                         and there are no signs of cephalopelvic
as soon as the cervix is fully dilated?
                                                         disproportion.
No. The patient should wait until the fetal head      4. If the head has not engaged after waiting
starts to distend the perineum, when she will            two hours, delivery by Caesarean
experience a strong urge to bear down. Only              section is most likely indicated A careful
one fifth or less of the fetal head or no fetal          examination of the patient must be done
head will be palpable above the brim of the              for cephalopelvic disproportion which may
pelvis at this time                                      be present as a result of a big fetus or an
                                                         abnormal presentation of the fetal head.
 A patient should only start bearing down when
 the fetal head distends the perineum and she has
 a strong urge to bear down.
THE SECOND STAGE OF LABOUR      75


4-8 In what position should                         4-9 How would you get the best
the patient be delivered?                           maternal co-operation during
                                                    the second stage of labour?
1. The patient is usually delivered on her
   back (i.e. the dorsal position) because it is    1. Good communication between the
   easier for the person managing the delivery.        patient and the midwife or doctor is
   However, this position has the disadvantage         very important. A relationship of trust
   that it may cause postural hypotension              developed during the first stage of labour
   which may result in fetal distress. This            will encourage good communication and
   problem can be avoided if a firm pillow is          co-operation during the second stage.
   placed under one of the patient’s hips so        2. The patient must know what is expected
   that she is turned 15 degrees onto her side         of her during the second stage. The person
   and does not lie flat on her back.                  conducting the delivery should encourage
2. The lateral position (i.e. on her side)             and support the patient and inform her
   prevents the problem of postural                    about the progress. Good co-operation and
   hypotension. In addition, the person                attempts at bearing down should be praised.
   conducting the delivery has a good view
   of the vulva and perineum, the pelvic            4-10 How should you ensure that a patient
   muscles are relaxed, and the delivery can        bears down as effectively as possible?
   be better controlled. The lateral position
   is particularly useful when the patient will     1. While the patient is passive in the first
   not give her full co-operation.                     stage, she must actively use her strength
3. The upright position (i.e. vertical or              during the second stage of labour to
   squatting position) is becoming more                assist the uterine contractions. The more
   frequently used. The patient sits on her heels      effectively she uses her strength, the
   and supports herself on outstretched arms.          shorter the second stage will be.
   This position has the following advantages:      2. The midwife or doctor must make sure
   • The maternal effort becomes more                  that the patient knows when and how to
       effective.                                      bear down.
   • The duration of the second stage is            3. It is important that she rests between
       shortened.                                      contractions and bears down during
   • Fewer patients need an assisted                   contractions.
       delivery.                                    4. At the height of the contraction, the
4. The semi-Fowler’s position, where the               patient is asked to take a deep breath, to
   patient’s back is lifted to 45 degrees from         put her chin on her chest, and to bear
   the horizontal, may be used instead of              down as if she were going to empty her
   the upright position. This partial sitting          rectum. This action is most effective and
   position is comfortable both for the patient        easiest if the patient holds onto her legs or
   and the person conducting the delivery.             some other firm object.
                                                    5. Each bearing down effort should last
The position used during the second stage of           as long as possible. This is better than a
labour depends on the patient’s choice and             number of short efforts.
the circumstances under which the delivery is       6. When the patient needs to breathe while
conducted. The position chosen should allow            pushing, she must quickly breathe out, take
for the best maternal effort at bearing down.          a deep breath and bear down again.
                                                    7. With multigravidas, it is sometimes
                                                       necessary for the patient to breathe rather
                                                       than push during a contraction to prevent
                                                       the fetal head from delivering too quickly.
76    INTRAPAR TUM CARE



                                                        bearing down, a doctor must assess the
 Good communication between the patient
                                                        patient for a possible assisted delivery.
 and the person conducting the delivery is very      2. If a primigravida has inadequate
 important during labour.                               uterine contractions and there are no
                                                        signs of cephalopelvic disproportion
4-11 What observations must be made                     (i.e. 2+ moulding or less), an oxytocin
during the second stage of labour?                      infusion should be started. When strong
                                                        contractions are obtained the patient must
If the head is still not engaged and it is decided      start bearing down.
to wait for engagement, the same observations        3. If there is no progress in the descent
usually made during the first stage of labour           of the head and signs of cephalopelvic
should be continued.                                    disproportion are present (i.e. 3+
If the head is engaged and the patient is asked         moulding), the patient should not bear
to bear down, the following observations                down. Instead she should concentrate
must be done:                                           on her breathing during contractions. A
                                                        Caesarean section is indicated.
1. Listen to the fetal heart between
   contractions to determine the baseline fetal
   heart rate.                                        With strong contractions and good bearing down
2. Listen to the fetal heart immediately after        there should be progress in the descent of the
   each contraction. If the fetal heart rate          presenting part onto the perineum.
   remains the same as that of the baseline
   rate, you are reassured that the fetus is in
   good condition. However, if the fetal heart       4-14 How should you manage fetal
   is slower at the end of the contraction,          distress in the second stage of labour?
   and the slow heart rate takes more than           1. An episiotomy should be done, if the fetal
   30 seconds to return to the baseline rate            head distends the perineum when the
   (i.e. a late deceleration), the fetus must be        patient bears down, so that the fetus can be
   delivered as rapidly as possible because             delivered with the next contraction.
   fetal distress has developed.                     2. If the perineum does not bulge with
3. Observe the frequency and duration of the            contractions and it appears as if the fetus
   uterine contractions.                                will not be delivered after the next two
4. Look for any vaginal bleeding.                       efforts at bearing down, then:
5. Record the progress of labour.                       • Assess and proceed with an
                                                            assisted delivery if there are no
4-12 How is progress monitored                              contraindications.
in the second stage of labour?                          • Otherwise an emergency Caesarean
                                                            section must be performed. While
With every uterine contraction and bearing
                                                            preparing the patient, intra-uterine
down effort there should be some progress in
                                                            resuscitation must be done.
the descent of the fetal head onto the perineum.

                                                     4-15 How should a normal vaginal
4-13 What should be done if there
                                                     delivery be managed?
is no progress in the descent of
the head onto the perineum?                          The midwife or doctor managing the
                                                     delivery must always be prepared for possible
1. If the patient has at least two contractions
                                                     complications. Equipment which may be
   in 10 minutes, each lasting 40 seconds
                                                     required must be at hand and in good working
   or more and there is no progress in the
                                                     order. Drugs which may be needed must be
   descent of the head after four attempts at
                                                     easily available.
THE SECOND STAGE OF LABOUR            77


1. Emptying the bladder: Any factor, such            EPISIOTOMY
   as a full bladder, that prevents descent of
   the fetal head or decreases the strength of
   uterine contractions should be corrected.         4-16 What is the place of an
   Therefore, it is very important for the           episiotomy in modern midwifery?
   patient to empty her bladder before
   starting to bear down.                            An episiotomy is not done routinely but only if
2. Supporting the perineum: A swab should be         there is a good indication, such as:
   placed over the patient’s anus to prevent the     1. When the infant needs to be delivered
   vulva, and later the fetal head, being soiled        without delay:
   with stool (i.e. faeces). It is important to         • Fetal distress during the second stage
   support the perineum in order to:                        of labour.
   • Increase flexion of the fetal head so that         • Maternal exhaustion.
       the smallest possible diameter passes            • A prolonged second stage of labour
       through the vagina. This can be done by              when the fetal head bulges the
       pressing immediately above the anus.                 perineum and it is obvious that an
   • Relieve the pressure on the perineum.                  episiotomy will hasten the delivery.
       Remember that the perineum must be               • When a quick and easy second stage
       in view all the time.                                is needed, e.g. in a patient with heart
3. Crowning of the head: When the head is                   valve disease.
   crowning the vaginal outlet is stretched          2. When there is a high risk of a third degree
   and an episiotomy may be indicated. The              tear:
   midwife or doctor should place one hand              • A thick, tight perineum.
   on the vertex to prevent sudden delivery of          • A previous third degree tear.
   the head. The other hand, supporting the             • A repaired rectocoele.
   perineum, is now moved upwards to help            3. When a breech or forceps delivery is done.
   extend the head. It is important that the fetal
   head is only controlled and not held back.        4-17 Does a second degree
4. Feeling for a cord: Check that the umbilical      tear heal faster and with fewer
   cord is not wrapped tightly around the            complications than an episiotomy?
   infant’s neck. A loose cord can be slipped
   over the head but a tight cord should be          Yes. A second degree tear is easier to
   clamped and cut.                                  repair and heals quicker with less pain and
5. Delivering of the shoulders and body: With        discomfort than an episiotomy. Therefore,
   gentle continuous posterior traction on           a second degree tear is preferable to an
   the head and lateral flexion, the anterior        episiotomy. A episiotomy should not be done
   shoulder is delivered from under the              routinely in primigravidas.
   symphysis pubis. The posterior shoulder is
   then lifted over the perineum. The rest of         An episiotomy should only be done if there is a
   the infant’s body is now delivered, following
                                                      definite indication.
   the curve of the birth canal and not by
   simply pulling it straight out of the vagina.
                                                     4-18 Which type of episiotomy
                                                     should be done?
                                                     Usually a mediolateral episiotomy is done.
                                                     However, if the midwife or doctor has
                                                     experience with the technique, a median
                                                     episiotomy can be done.
78    INTRAPAR TUM CARE




PROLONGED SECOND                                       4-21 How should a patient with
                                                       prolonged second stage of labour
STAGE OF LABOUR                                        be managed during transfer to a
                                                       hospital for Caesarean section?
4-19 What is the definition of a                       1. The patient should lie on her side and not
prolonged second stage of labour?                         bear down with contractions. Instead, she
                                                          should concentrate on her breathing.
1. When diagnosing a prolonged second stage            2. An intravenous infusion should be
   the time is usually measured from the start            started and two ampoules (5 μg each)
   of bearing down.                                       of hexoprenaline (Ipradol) given slowly
2. If a primigravida bears down for more than             intravenously or three nifedipine
   45 minutes, or a multigravida for more                 (Adalat) 10 mg capsules (30 mg in total)
   than 30 minutes, without the infant being              given by mouth, provided there are no
   delivered, a prolonged second stage of                 contraindications.
   labour is diagnosed.                                3. If there are any signs of fetal distress the
3. The most senior clinician available should             patient should be given oxygen by face
   be notified and called to help.                        mask.

 The second stage of labour is prolonged if it lasts   4-22 What factors indicate that a
 longer than 45 minutes in a primigravida or 30        patient is at an increased risk of a
 minutes in a multigravida.                            prolonged second stage of labour?
                                                       1. Factors during the antenatal period which
4-20 How should you manage a patient                      suggest that the patient will deliver a large
with a prolonged second stage of labour?                  infant:
                                                          • A patient with a symphysis-fundus
1. Usually an assisted delivery is done                       height measurement above the 90th
   once cephalopelvic disproportion has                       centile, when multiple pregnancy and
   been excluded and 1/5 or no fetal head                     polyhydramnios have been excluded,
   remains palpable above the pelvic brim.                    i.e. there appears to be a large fetus.
   A Caesarean section should be done if                  • Any patient with a symphysis-fundus
   cephalopelvic disproportion is present.                    height of 40 cm or more may have a
2. If a doctor is not available, the patient                  fetus of 4 kg or more. Very few with a
   should be referred to a level 1 or 2                       symphysis fundus measurement of less
   hospital with facilities to perform a                      than 40 cm will have a term infant of
   Caesarean section.                                         4 kg or more.
                                                          • A patient with diabetes mellitus.
 Prolonged second stage of labour is a dangerous          • A patient who weighs more than 85 kg.
 complication which requires immediate and                • A patient with a previous infant
                                                              weighing 4 kg or more at birth.
 appropriate management.
                                                       2. Factors during the first stage of labour:
                                                          • An estimated fetal weight, assessed
                                                              on abdominal examination, of 4 kg or
                                                              more.
                                                          • A patient with poor progress in the
                                                              first stage of labour before eventually
                                                              reaching full cervical dilatation.
                                                          • A patient who progressed normally
                                                              during the active phase of the first stage
THE SECOND STAGE OF LABOUR      79


       of labour, but whose progress was slower         must give the midwife or doctor her full
       from 7 or 8 cm until full dilatation.            co-operation.
                                                     2. The patient should be moved so that her
                                                        buttocks are over the edge of the bed to
 Slow progress in the first stage of labour may be      allow good downward traction on the
 followed by a prolonged second stage of labour.        fetal head. This can be done rapidly by
                                                        removing the end of the bed or by turning
                                                        the patient across the bed.
MANAGEMENT OF                                        3. The patient’s hips and knees must be fully
                                                        flexed so that her knees almost touch
IMPACTED SHOULDERS                                      her shoulders. The midwife or doctor
                                                        must hold the infant’s head between both
                                                        hands and firmly pull the head down
4-23 Which patients are at high risk of
                                                        (posteriorly) while an assistant must at
developing impacted shoulders?
                                                        the same time press firmly just above the
The same patients who are at high risk of a             patient’s symphysis pubis. The amount
prolonged second stage of labour are also at            of downward traction applied should be
high risk for impacted shoulders (shoulder              gradually increased until a reasonable
dystocia), i.e. women who probably have a               amount of traction is used. This reduces the
large infant.                                           risk of a brachial plexus injury as opposed
                                                        to traction applied as a jerk. The suprapubic
4-24 What signs during the second                       pressure must be firm enough to allow
stage of labour indicate that the                       the assistant’s hand to pass behind the
shoulders are impacted?                                 symphysis pubis. This procedure helps to get
                                                        the infant’s anterior shoulder to pass under
1. Normally the infant’s head is delivered              the symphysis pubis. The patient must bear
   by extension. However, with impacted                 down as strongly as possible during these
   shoulders the head is held back, does                attempts to deliver the shoulders.
   not distend the perineum and does not                This procedure to deliver impacted
   undergo the normal rotation.                         shoulders is called the MacRobert’s method.
2. The size of the infant’s head and cheeks at       1. If the infant is not delivered after two
   delivery indicate that the infant is big and         attempts, you should deliver the posterior
   fat. Usually the patient is also fat.                shoulder:
3. Attempts at external rotation, lateral               • The midwife or doctor should place a
   flexion and traction fail to deliver the                 right hand (if right-handed) or a left
   shoulders.                                               hand (if left-handed) posterior to the
The earlier these signs of impacted shoulders               fetus in the vagina to reach the infant’s
are recognised, the better is the chance that               shoulder. The cavity of the sacrum is
this complication will be successfully managed.             the only area which provides space for
                                                            manipulation.
4-25 How should a patient with                          • The posterior arm of the infant should
impacted shoulders be managed?                              be followed until the elbow is reached.
                                                            The arm must be flexed at the elbow
The following management should be carefully                and then pulled anteriorly over the
followed in a step-by-step manner:                          chest and out of the vagina. Delivery
1. The patient must be told that a serious                  of the posterior arm also delivers the
   complication has developed and that she                  posterior shoulder.
80       INTRAPAR TUM CARE



     •    The anterior shoulder can now be                suctioned. If necessary hold the shoulders
          freed by pulling the infant’s head down         back until the airways have been cleared.
          (posteriorly).                                  Always suction the mouth first before
     •    If the anterior shoulder cannot be              clearing the nose.
          released, the infant must be rotated         2. With clear liquor: Suctioning the infant’s
          through 180 degrees. During the                 airways is not necessary before delivering
          rotation the infant’s head and freed            the shoulders. After delivery suctioning is
          arm should be firmly held. The freed            only needed if the infant does not breathe
          arm will indicate the direction of the          well.
          rotation, i.e. turn the infant so that the
          shoulder follows the freed arm. Once         4-27 What is the immediate management
          the anterior shoulder has been rotated       of the infant after a vaginal delivery?
          into the hollow of the sacrum, the
          trapped shoulder can be released by          Dry the infant very well and assess whether
          inserting a hand posteriorly, flexing the    the infant cries or breathes well. If the
          arm at the elbow and pulling the arm         infant breathes well, leave the infant on the
          out of the vagina.                           mother’s abdomen and only clamp and cut the
                                                       umbilical cord after two to three minutes. If
The rules of delivering impacted shoulders             the infant does not breathe well, clamp and cut
must be followed carefully without panicking.          the cord immediately and move the infant to a
If the infant is delivered within five minutes of      convenient place for resuscitation.
detecting the complication, no brain damage
should occur. While the above management
helps to reduce the risk of birth injury, fracture     CASE STUDY 1
of the clavicle or humerus may occur with
delivery of the posterior shoulder. This is
                                                       A multiparous patient presents in labour at
preferable to an Erb’s palsy (brachial plexus
                                                       18:00. The fetal head is palpable 3/5 above
injury). Time should not be wasted trying
                                                       the pelvic brim and the cervix is found to
other methods which are not effective. The
                                                       be 7 cm dilated. The vaginal examination is
management of impacted shoulders should
                                                       repeated at 21:00 when the alert line indicates
regularly be practised on mannequins.
                                                       that the cervix should be fully dilated. The
                                                       examination confirms that the cervix is
 Impaction of the shoulders is a serious               fully dilated. However, the fetal head is still
 complication and requires fast and effective          not engaged. Preparations are made for the
 management according to a clear plan.                 patient to start bearing down.

                                                       1. Do you agree that the patient should
MANAGING THE                                           start bearing down now that she has
                                                       reached full dilatation of the cervix?
NEWBORN INFANT                                         No. She should not start bearing down until
                                                       the fetal head is engaged and has reached the
                                                       perineum.
4-26 Should you suction the
infant’s airways at delivery?
                                                       2. What symptoms and signs would
1. With meconium-stained liquor: Once                  indicate to you that the patient
   the infant’s head has been delivered, do            should start bearing down?
   not carry on with the delivery until the
   infant’s mouth and throat have been well            The patient will have an uncontrollable urge to
                                                       bear down. In addition the fetal head will be
THE SECOND STAGE OF LABOUR         81


engaged on abdominal examination and the           palpable above the pelvic brim while 3+
fetal head will distend the perineum when the      moulding is found on vaginal examination.
patient bears down.                                The patient wants to bear down with
                                                   contractions.
3. If the abdominal examination
shows that the fetal head is not                   1. What complications would you expect
engaged what conditions must be                    when you consider the patient’s progress
met when deciding to wait before                   during the first stage of labour?
allowing the patient to bear down?
                                                   A prolonged second stage of labour as the
Fetal distress must be excluded by making          patient’s progress in labour was slower than
sure that there are no late fetal heart rate       expected between 7 cm and full dilatation.
decelerations. Cephalopelvic disproportion
must also be excluded by finding 2+ moulding       2. What would be the most likely cause of
or less on vaginal examination.                    a prolonged second stage in this patient?
                                                   Cephalopelvic disproportion as indicated by
4. How long is it safe to wait for
                                                   an unengaged fetal head and 3+ moulding.
the fetal head to engage?
The patient should be examined again after         3. Do you agree with the decision
an hour. If the head is still not engaged, you     to allow the patient to bear down
can wait for a further hour provided that          because she is fully dilated?
there are still no signs of either cephalopelvic
disproportion or fetal distress. Thereafter,       No. As the patient has cephalopelvic
the patient must be evaluated for an assisted      disproportion, a Caesarean section must be
delivery. If the conditions for an assisted        performed.
delivery cannot be met, a Caesarean section
must be done.                                      4. How should this patient be managed
                                                   further if she is at a clinic?
5. Would you manage a primigravid                  She must be referred to a hospital with
patient in the same way as a muligravida           facilities to perform a Caesarean section.
if she reached full cervical dilatation
without engagement of the fetal head?              5. What arrangements must be
Usually primigravidas only reach full              made to make the transfer of this
cervical dilatation after the fetal head           patient as safe as possible?
has engaged. Therefore, there is a greater         The patient must lie on her side and an
chance of cephalopelvic disproportion in           intravenous infusion must be started. If there
a primigravida than in a multigravida who          are no contraindications, the contractions
may reach full cervical dilatation with an         must be stopped with intravenous
unengaged fetal head.                              hexoprenaline (Ipradol) or oral nifedipine
                                                   (Adalat). If there is any concern about the
                                                   condition of the fetus, the patient must be
CASE STUDY 2                                       given face mask oxygen.

A patient who progressed normally during
the first stage of labour until a cervical
dilatation of 7 cm reaches full dilatation of
the cervix after a further five hours. At the
last examination 3/5 of the fetal head is still
82   INTRAPAR TUM CARE




CASE STUDY 3                                      5. How would you have managed this
                                                  patient if the prolonged labour was due
                                                  to poor co-operation and ineffective
A primigravida patient has still not delivered
                                                  attempts at bearing down by the patient?
after her cervix has been fully dilated for
45 minutes. The fetal head is not palpable        Good communication between the staff
abdominally and bulges the perineum when          and the patient during the first stage of
the patient bears down with contractions. A       labour should have established a trusting
prolonged second stage is diagnosed and a         relationship. The patient should have been
decision made to proceed with an assisted         told exactly what she should do during the
delivery.                                         second stage. She should also have beeen
                                                  supported, encouraged and praised.
1. Do you agree with the diagnosis
of prolonged second stage?
This will depend on when the patient started
                                                  CASE STUDY 4
to bear down and whether her attempts at
bearing down were effective. The diagnosis is     A multigravid patient weighing 110 kg
correct if she has been bearing down well for     progresses to full cervical dilatation. After
45 minutes.                                       30 minutes in the second stage of labour, the
                                                  infant’s head is delivered with difficulty. The
                                                  head is held back and does not distend the
2. What should your management
                                                  perineum while rotation of the head does not
be if the patient has been bearing
                                                  occur.
down well for 45 minutes?
As the head is not palpable abdominally and       1. What complication has occurred
is distending the perineum, an episiotomy         during the second stage of labour?
should be done. Thereafter, if the infant has
not been delivered after a few contractions       Impaction of the shoulders (i.e. shoulder
with the patient bearing down well, the patient   dystocia).
must be evaluated for an assisted delivery.
                                                  2. How could this complication
3. Should an episiotomy be done at                have been predicted?
the delivery of all primigravidas?                An overweight patient is at risk for developing
No. Only if there is a definite indication for    impacted shoulders as infants born to these
an episiotomy. In this case an episiotomy is      patients are often very big.
indicated as the second stage is prolonged and
delivery would probably be rapidly achieved       3. How should this patient
with an episiotomy.                               be further managed?
                                                  The patient’s buttocks must be moved to the
4. The infant is delivered just before an         edge of the bed so that good posterior traction
episiotomy is done and after the birth it         can be applied to the infant’s head. This can
is noticed that the patient has a second          be done quickly if the end of the bed can
degree perineal tear. Would it have been          be removed or if the patient can be swung
preferable to have done an episiotomy?            around across the bed. The patient’s hips
No. A second degree tear is preferable to an      and knees should be flexed so that her knees
episiotomy. A second degree tear is easier to     almost reach her shoulders. The infant’s head
repair, heals faster and causes less pain and     should be firmly held between both hands
discomfort than an episiotomy.                    and pulled downwards (posteriorly) while an
THE SECOND STAGE OF LABOUR   83


assistant, at the same time, presses down over
the suprapubic area. The amount of downward
traction applied should be gradually increased
until a reasonable amount of traction is used.

4. What should the further management
be if these attempts to deliver the
shoulders are not successful?
An immediate attempt must be made to
deliver the infant’s posterior arm. The person
conducting the delivery must place a hand
posterior to the fetus in the vagina, flex the
infant’s posterior arm at the elbow and pull
it out anteriorly over the chest. When the
arm is pulled out the posterior shoulder will
automatically be delivered as well. The anterior
shoulder can now be released by pulling the
infant’s head downwards.

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Intrapartum Care: The second stage of labour

  • 1. 4 The second stage of labour Before you begin this unit, please take the THE NORMAL SECOND corresponding test at the end of the book to assess your knowledge of the subject matter. You STAGE OF LABOUR should redo the test after you’ve worked through the unit, to evaluate what you have learned 4-1 What is the second stage of labour? The second stage of labour starts when the Objectives patient’s cervix is fully dilated and ends when the infant is completely delivered. When you have completed this unit you should be able to: The second stage of labour starts when the cervix • Identify the onset of the second stage of is fully dilated. labour. • Decide when the patient should start to 4-2 What symptoms and signs suggest that bear down. the second stage of labour has begun? • Communicate effectively with a patient One or more of the following may occur: during labour. 1. Uterine contractions increase in both • Use the maternal effort to the best frequency and duration, i.e. they are more advantage when the patient bears down. frequent and last longer. • Make careful observations during the 2. The patient becomes restless. second stage of labour. 3. Nausea and vomiting often occur. 4. The patient has an uncontrollable urge to • Accurately evaluate progress in the bear down (push). second stage of labour. 5. The perineum bulges during a contraction • Manage a patient with a prolonged as it is stretched by the fetal head. second stage of labour. If the symptoms and signs suggest that • Diagnose and manage impacted the second stage of labour has begun, an shoulders. abdominal examination must be done to assess the amount of head palpable above the
  • 2. 74 INTRAPAR TUM CARE pelvic brim, followed by a vaginal examination 4-6 If the cervix is fully dilated but to assess whether the cervix is fully dilated. the head not yet engaged, when is it safe to wait for engagement before 4-3 Is there a difference between allowing the patient to bear down? primigravidas and multigravidas at the 1. If there are no signs of fetal distress. start of the second stage of labour? 2. If there are no signs of cephalopelvic Yes. In primigravidas the head is usually disproportion. engaged when the cervix reaches full dilatation. In contrast, multigravidas often Waiting for engagement of the head in a reach full cervical dilatation when the fetal patient with a fully dilated cervix should only be head is still not engaged. allowed if there are no signs of fetal distress or cephalopelvic disproportion. 4-4 What is the definition of engagement of the fetal head? Usually primigravidas only reach full cervical The fetal head is engaged when the largest dilatation after the fetal head has engaged. transverse diameter of the head (the biparietal However the fetal head may only engage after diameter) has passed through the pelvic inlet. the cervix is fully dilated in a multigravida. When the fetal head is engaged, 2/5 or less of Therefore, there is a greater chance of the head is palpable above the pelvic brim. cephalopelvic disproportion in a primigravida who reaches full cervical dilatation with an The fetal head is engaged when only 2/5 or less of unengaged fetal head. the head is palpable above the brim of the pelvis 4-7 How long should you wait before asking the patient to bear down if the cervix is fully Engagement usually starts before the onset dilated but the head is not yet engaged? of labour. Initially 5/5 of the head is palpable above the pelvic brim. Engagement of the head 1. The patient should be assessed after an cannot be determined on vaginal examination. hour if there are no signs of fetal distress and the maternal observations are normal. 2. Usually engagement of the head will occur MANAGING THE SECOND during this time and the patient will feel a strong urge to bear down within an hour. STAGE OF LABOUR 3. If the head has still not engaged after an hour, you can wait a further hour provided that all other observations are normal 4-5 Should the patient start bearing down and there are no signs of cephalopelvic as soon as the cervix is fully dilated? disproportion. No. The patient should wait until the fetal head 4. If the head has not engaged after waiting starts to distend the perineum, when she will two hours, delivery by Caesarean experience a strong urge to bear down. Only section is most likely indicated A careful one fifth or less of the fetal head or no fetal examination of the patient must be done head will be palpable above the brim of the for cephalopelvic disproportion which may pelvis at this time be present as a result of a big fetus or an abnormal presentation of the fetal head. A patient should only start bearing down when the fetal head distends the perineum and she has a strong urge to bear down.
  • 3. THE SECOND STAGE OF LABOUR 75 4-8 In what position should 4-9 How would you get the best the patient be delivered? maternal co-operation during the second stage of labour? 1. The patient is usually delivered on her back (i.e. the dorsal position) because it is 1. Good communication between the easier for the person managing the delivery. patient and the midwife or doctor is However, this position has the disadvantage very important. A relationship of trust that it may cause postural hypotension developed during the first stage of labour which may result in fetal distress. This will encourage good communication and problem can be avoided if a firm pillow is co-operation during the second stage. placed under one of the patient’s hips so 2. The patient must know what is expected that she is turned 15 degrees onto her side of her during the second stage. The person and does not lie flat on her back. conducting the delivery should encourage 2. The lateral position (i.e. on her side) and support the patient and inform her prevents the problem of postural about the progress. Good co-operation and hypotension. In addition, the person attempts at bearing down should be praised. conducting the delivery has a good view of the vulva and perineum, the pelvic 4-10 How should you ensure that a patient muscles are relaxed, and the delivery can bears down as effectively as possible? be better controlled. The lateral position is particularly useful when the patient will 1. While the patient is passive in the first not give her full co-operation. stage, she must actively use her strength 3. The upright position (i.e. vertical or during the second stage of labour to squatting position) is becoming more assist the uterine contractions. The more frequently used. The patient sits on her heels effectively she uses her strength, the and supports herself on outstretched arms. shorter the second stage will be. This position has the following advantages: 2. The midwife or doctor must make sure • The maternal effort becomes more that the patient knows when and how to effective. bear down. • The duration of the second stage is 3. It is important that she rests between shortened. contractions and bears down during • Fewer patients need an assisted contractions. delivery. 4. At the height of the contraction, the 4. The semi-Fowler’s position, where the patient is asked to take a deep breath, to patient’s back is lifted to 45 degrees from put her chin on her chest, and to bear the horizontal, may be used instead of down as if she were going to empty her the upright position. This partial sitting rectum. This action is most effective and position is comfortable both for the patient easiest if the patient holds onto her legs or and the person conducting the delivery. some other firm object. 5. Each bearing down effort should last The position used during the second stage of as long as possible. This is better than a labour depends on the patient’s choice and number of short efforts. the circumstances under which the delivery is 6. When the patient needs to breathe while conducted. The position chosen should allow pushing, she must quickly breathe out, take for the best maternal effort at bearing down. a deep breath and bear down again. 7. With multigravidas, it is sometimes necessary for the patient to breathe rather than push during a contraction to prevent the fetal head from delivering too quickly.
  • 4. 76 INTRAPAR TUM CARE bearing down, a doctor must assess the Good communication between the patient patient for a possible assisted delivery. and the person conducting the delivery is very 2. If a primigravida has inadequate important during labour. uterine contractions and there are no signs of cephalopelvic disproportion 4-11 What observations must be made (i.e. 2+ moulding or less), an oxytocin during the second stage of labour? infusion should be started. When strong contractions are obtained the patient must If the head is still not engaged and it is decided start bearing down. to wait for engagement, the same observations 3. If there is no progress in the descent usually made during the first stage of labour of the head and signs of cephalopelvic should be continued. disproportion are present (i.e. 3+ If the head is engaged and the patient is asked moulding), the patient should not bear to bear down, the following observations down. Instead she should concentrate must be done: on her breathing during contractions. A Caesarean section is indicated. 1. Listen to the fetal heart between contractions to determine the baseline fetal heart rate. With strong contractions and good bearing down 2. Listen to the fetal heart immediately after there should be progress in the descent of the each contraction. If the fetal heart rate presenting part onto the perineum. remains the same as that of the baseline rate, you are reassured that the fetus is in good condition. However, if the fetal heart 4-14 How should you manage fetal is slower at the end of the contraction, distress in the second stage of labour? and the slow heart rate takes more than 1. An episiotomy should be done, if the fetal 30 seconds to return to the baseline rate head distends the perineum when the (i.e. a late deceleration), the fetus must be patient bears down, so that the fetus can be delivered as rapidly as possible because delivered with the next contraction. fetal distress has developed. 2. If the perineum does not bulge with 3. Observe the frequency and duration of the contractions and it appears as if the fetus uterine contractions. will not be delivered after the next two 4. Look for any vaginal bleeding. efforts at bearing down, then: 5. Record the progress of labour. • Assess and proceed with an assisted delivery if there are no 4-12 How is progress monitored contraindications. in the second stage of labour? • Otherwise an emergency Caesarean section must be performed. While With every uterine contraction and bearing preparing the patient, intra-uterine down effort there should be some progress in resuscitation must be done. the descent of the fetal head onto the perineum. 4-15 How should a normal vaginal 4-13 What should be done if there delivery be managed? is no progress in the descent of the head onto the perineum? The midwife or doctor managing the delivery must always be prepared for possible 1. If the patient has at least two contractions complications. Equipment which may be in 10 minutes, each lasting 40 seconds required must be at hand and in good working or more and there is no progress in the order. Drugs which may be needed must be descent of the head after four attempts at easily available.
  • 5. THE SECOND STAGE OF LABOUR 77 1. Emptying the bladder: Any factor, such EPISIOTOMY as a full bladder, that prevents descent of the fetal head or decreases the strength of uterine contractions should be corrected. 4-16 What is the place of an Therefore, it is very important for the episiotomy in modern midwifery? patient to empty her bladder before starting to bear down. An episiotomy is not done routinely but only if 2. Supporting the perineum: A swab should be there is a good indication, such as: placed over the patient’s anus to prevent the 1. When the infant needs to be delivered vulva, and later the fetal head, being soiled without delay: with stool (i.e. faeces). It is important to • Fetal distress during the second stage support the perineum in order to: of labour. • Increase flexion of the fetal head so that • Maternal exhaustion. the smallest possible diameter passes • A prolonged second stage of labour through the vagina. This can be done by when the fetal head bulges the pressing immediately above the anus. perineum and it is obvious that an • Relieve the pressure on the perineum. episiotomy will hasten the delivery. Remember that the perineum must be • When a quick and easy second stage in view all the time. is needed, e.g. in a patient with heart 3. Crowning of the head: When the head is valve disease. crowning the vaginal outlet is stretched 2. When there is a high risk of a third degree and an episiotomy may be indicated. The tear: midwife or doctor should place one hand • A thick, tight perineum. on the vertex to prevent sudden delivery of • A previous third degree tear. the head. The other hand, supporting the • A repaired rectocoele. perineum, is now moved upwards to help 3. When a breech or forceps delivery is done. extend the head. It is important that the fetal head is only controlled and not held back. 4-17 Does a second degree 4. Feeling for a cord: Check that the umbilical tear heal faster and with fewer cord is not wrapped tightly around the complications than an episiotomy? infant’s neck. A loose cord can be slipped over the head but a tight cord should be Yes. A second degree tear is easier to clamped and cut. repair and heals quicker with less pain and 5. Delivering of the shoulders and body: With discomfort than an episiotomy. Therefore, gentle continuous posterior traction on a second degree tear is preferable to an the head and lateral flexion, the anterior episiotomy. A episiotomy should not be done shoulder is delivered from under the routinely in primigravidas. symphysis pubis. The posterior shoulder is then lifted over the perineum. The rest of An episiotomy should only be done if there is a the infant’s body is now delivered, following definite indication. the curve of the birth canal and not by simply pulling it straight out of the vagina. 4-18 Which type of episiotomy should be done? Usually a mediolateral episiotomy is done. However, if the midwife or doctor has experience with the technique, a median episiotomy can be done.
  • 6. 78 INTRAPAR TUM CARE PROLONGED SECOND 4-21 How should a patient with prolonged second stage of labour STAGE OF LABOUR be managed during transfer to a hospital for Caesarean section? 4-19 What is the definition of a 1. The patient should lie on her side and not prolonged second stage of labour? bear down with contractions. Instead, she should concentrate on her breathing. 1. When diagnosing a prolonged second stage 2. An intravenous infusion should be the time is usually measured from the start started and two ampoules (5 μg each) of bearing down. of hexoprenaline (Ipradol) given slowly 2. If a primigravida bears down for more than intravenously or three nifedipine 45 minutes, or a multigravida for more (Adalat) 10 mg capsules (30 mg in total) than 30 minutes, without the infant being given by mouth, provided there are no delivered, a prolonged second stage of contraindications. labour is diagnosed. 3. If there are any signs of fetal distress the 3. The most senior clinician available should patient should be given oxygen by face be notified and called to help. mask. The second stage of labour is prolonged if it lasts 4-22 What factors indicate that a longer than 45 minutes in a primigravida or 30 patient is at an increased risk of a minutes in a multigravida. prolonged second stage of labour? 1. Factors during the antenatal period which 4-20 How should you manage a patient suggest that the patient will deliver a large with a prolonged second stage of labour? infant: • A patient with a symphysis-fundus 1. Usually an assisted delivery is done height measurement above the 90th once cephalopelvic disproportion has centile, when multiple pregnancy and been excluded and 1/5 or no fetal head polyhydramnios have been excluded, remains palpable above the pelvic brim. i.e. there appears to be a large fetus. A Caesarean section should be done if • Any patient with a symphysis-fundus cephalopelvic disproportion is present. height of 40 cm or more may have a 2. If a doctor is not available, the patient fetus of 4 kg or more. Very few with a should be referred to a level 1 or 2 symphysis fundus measurement of less hospital with facilities to perform a than 40 cm will have a term infant of Caesarean section. 4 kg or more. • A patient with diabetes mellitus. Prolonged second stage of labour is a dangerous • A patient who weighs more than 85 kg. complication which requires immediate and • A patient with a previous infant weighing 4 kg or more at birth. appropriate management. 2. Factors during the first stage of labour: • An estimated fetal weight, assessed on abdominal examination, of 4 kg or more. • A patient with poor progress in the first stage of labour before eventually reaching full cervical dilatation. • A patient who progressed normally during the active phase of the first stage
  • 7. THE SECOND STAGE OF LABOUR 79 of labour, but whose progress was slower must give the midwife or doctor her full from 7 or 8 cm until full dilatation. co-operation. 2. The patient should be moved so that her buttocks are over the edge of the bed to Slow progress in the first stage of labour may be allow good downward traction on the followed by a prolonged second stage of labour. fetal head. This can be done rapidly by removing the end of the bed or by turning the patient across the bed. MANAGEMENT OF 3. The patient’s hips and knees must be fully flexed so that her knees almost touch IMPACTED SHOULDERS her shoulders. The midwife or doctor must hold the infant’s head between both hands and firmly pull the head down 4-23 Which patients are at high risk of (posteriorly) while an assistant must at developing impacted shoulders? the same time press firmly just above the The same patients who are at high risk of a patient’s symphysis pubis. The amount prolonged second stage of labour are also at of downward traction applied should be high risk for impacted shoulders (shoulder gradually increased until a reasonable dystocia), i.e. women who probably have a amount of traction is used. This reduces the large infant. risk of a brachial plexus injury as opposed to traction applied as a jerk. The suprapubic 4-24 What signs during the second pressure must be firm enough to allow stage of labour indicate that the the assistant’s hand to pass behind the shoulders are impacted? symphysis pubis. This procedure helps to get the infant’s anterior shoulder to pass under 1. Normally the infant’s head is delivered the symphysis pubis. The patient must bear by extension. However, with impacted down as strongly as possible during these shoulders the head is held back, does attempts to deliver the shoulders. not distend the perineum and does not This procedure to deliver impacted undergo the normal rotation. shoulders is called the MacRobert’s method. 2. The size of the infant’s head and cheeks at 1. If the infant is not delivered after two delivery indicate that the infant is big and attempts, you should deliver the posterior fat. Usually the patient is also fat. shoulder: 3. Attempts at external rotation, lateral • The midwife or doctor should place a flexion and traction fail to deliver the right hand (if right-handed) or a left shoulders. hand (if left-handed) posterior to the The earlier these signs of impacted shoulders fetus in the vagina to reach the infant’s are recognised, the better is the chance that shoulder. The cavity of the sacrum is this complication will be successfully managed. the only area which provides space for manipulation. 4-25 How should a patient with • The posterior arm of the infant should impacted shoulders be managed? be followed until the elbow is reached. The arm must be flexed at the elbow The following management should be carefully and then pulled anteriorly over the followed in a step-by-step manner: chest and out of the vagina. Delivery 1. The patient must be told that a serious of the posterior arm also delivers the complication has developed and that she posterior shoulder.
  • 8. 80 INTRAPAR TUM CARE • The anterior shoulder can now be suctioned. If necessary hold the shoulders freed by pulling the infant’s head down back until the airways have been cleared. (posteriorly). Always suction the mouth first before • If the anterior shoulder cannot be clearing the nose. released, the infant must be rotated 2. With clear liquor: Suctioning the infant’s through 180 degrees. During the airways is not necessary before delivering rotation the infant’s head and freed the shoulders. After delivery suctioning is arm should be firmly held. The freed only needed if the infant does not breathe arm will indicate the direction of the well. rotation, i.e. turn the infant so that the shoulder follows the freed arm. Once 4-27 What is the immediate management the anterior shoulder has been rotated of the infant after a vaginal delivery? into the hollow of the sacrum, the trapped shoulder can be released by Dry the infant very well and assess whether inserting a hand posteriorly, flexing the the infant cries or breathes well. If the arm at the elbow and pulling the arm infant breathes well, leave the infant on the out of the vagina. mother’s abdomen and only clamp and cut the umbilical cord after two to three minutes. If The rules of delivering impacted shoulders the infant does not breathe well, clamp and cut must be followed carefully without panicking. the cord immediately and move the infant to a If the infant is delivered within five minutes of convenient place for resuscitation. detecting the complication, no brain damage should occur. While the above management helps to reduce the risk of birth injury, fracture CASE STUDY 1 of the clavicle or humerus may occur with delivery of the posterior shoulder. This is A multiparous patient presents in labour at preferable to an Erb’s palsy (brachial plexus 18:00. The fetal head is palpable 3/5 above injury). Time should not be wasted trying the pelvic brim and the cervix is found to other methods which are not effective. The be 7 cm dilated. The vaginal examination is management of impacted shoulders should repeated at 21:00 when the alert line indicates regularly be practised on mannequins. that the cervix should be fully dilated. The examination confirms that the cervix is Impaction of the shoulders is a serious fully dilated. However, the fetal head is still complication and requires fast and effective not engaged. Preparations are made for the management according to a clear plan. patient to start bearing down. 1. Do you agree that the patient should MANAGING THE start bearing down now that she has reached full dilatation of the cervix? NEWBORN INFANT No. She should not start bearing down until the fetal head is engaged and has reached the perineum. 4-26 Should you suction the infant’s airways at delivery? 2. What symptoms and signs would 1. With meconium-stained liquor: Once indicate to you that the patient the infant’s head has been delivered, do should start bearing down? not carry on with the delivery until the infant’s mouth and throat have been well The patient will have an uncontrollable urge to bear down. In addition the fetal head will be
  • 9. THE SECOND STAGE OF LABOUR 81 engaged on abdominal examination and the palpable above the pelvic brim while 3+ fetal head will distend the perineum when the moulding is found on vaginal examination. patient bears down. The patient wants to bear down with contractions. 3. If the abdominal examination shows that the fetal head is not 1. What complications would you expect engaged what conditions must be when you consider the patient’s progress met when deciding to wait before during the first stage of labour? allowing the patient to bear down? A prolonged second stage of labour as the Fetal distress must be excluded by making patient’s progress in labour was slower than sure that there are no late fetal heart rate expected between 7 cm and full dilatation. decelerations. Cephalopelvic disproportion must also be excluded by finding 2+ moulding 2. What would be the most likely cause of or less on vaginal examination. a prolonged second stage in this patient? Cephalopelvic disproportion as indicated by 4. How long is it safe to wait for an unengaged fetal head and 3+ moulding. the fetal head to engage? The patient should be examined again after 3. Do you agree with the decision an hour. If the head is still not engaged, you to allow the patient to bear down can wait for a further hour provided that because she is fully dilated? there are still no signs of either cephalopelvic disproportion or fetal distress. Thereafter, No. As the patient has cephalopelvic the patient must be evaluated for an assisted disproportion, a Caesarean section must be delivery. If the conditions for an assisted performed. delivery cannot be met, a Caesarean section must be done. 4. How should this patient be managed further if she is at a clinic? 5. Would you manage a primigravid She must be referred to a hospital with patient in the same way as a muligravida facilities to perform a Caesarean section. if she reached full cervical dilatation without engagement of the fetal head? 5. What arrangements must be Usually primigravidas only reach full made to make the transfer of this cervical dilatation after the fetal head patient as safe as possible? has engaged. Therefore, there is a greater The patient must lie on her side and an chance of cephalopelvic disproportion in intravenous infusion must be started. If there a primigravida than in a multigravida who are no contraindications, the contractions may reach full cervical dilatation with an must be stopped with intravenous unengaged fetal head. hexoprenaline (Ipradol) or oral nifedipine (Adalat). If there is any concern about the condition of the fetus, the patient must be CASE STUDY 2 given face mask oxygen. A patient who progressed normally during the first stage of labour until a cervical dilatation of 7 cm reaches full dilatation of the cervix after a further five hours. At the last examination 3/5 of the fetal head is still
  • 10. 82 INTRAPAR TUM CARE CASE STUDY 3 5. How would you have managed this patient if the prolonged labour was due to poor co-operation and ineffective A primigravida patient has still not delivered attempts at bearing down by the patient? after her cervix has been fully dilated for 45 minutes. The fetal head is not palpable Good communication between the staff abdominally and bulges the perineum when and the patient during the first stage of the patient bears down with contractions. A labour should have established a trusting prolonged second stage is diagnosed and a relationship. The patient should have been decision made to proceed with an assisted told exactly what she should do during the delivery. second stage. She should also have beeen supported, encouraged and praised. 1. Do you agree with the diagnosis of prolonged second stage? This will depend on when the patient started CASE STUDY 4 to bear down and whether her attempts at bearing down were effective. The diagnosis is A multigravid patient weighing 110 kg correct if she has been bearing down well for progresses to full cervical dilatation. After 45 minutes. 30 minutes in the second stage of labour, the infant’s head is delivered with difficulty. The head is held back and does not distend the 2. What should your management perineum while rotation of the head does not be if the patient has been bearing occur. down well for 45 minutes? As the head is not palpable abdominally and 1. What complication has occurred is distending the perineum, an episiotomy during the second stage of labour? should be done. Thereafter, if the infant has not been delivered after a few contractions Impaction of the shoulders (i.e. shoulder with the patient bearing down well, the patient dystocia). must be evaluated for an assisted delivery. 2. How could this complication 3. Should an episiotomy be done at have been predicted? the delivery of all primigravidas? An overweight patient is at risk for developing No. Only if there is a definite indication for impacted shoulders as infants born to these an episiotomy. In this case an episiotomy is patients are often very big. indicated as the second stage is prolonged and delivery would probably be rapidly achieved 3. How should this patient with an episiotomy. be further managed? The patient’s buttocks must be moved to the 4. The infant is delivered just before an edge of the bed so that good posterior traction episiotomy is done and after the birth it can be applied to the infant’s head. This can is noticed that the patient has a second be done quickly if the end of the bed can degree perineal tear. Would it have been be removed or if the patient can be swung preferable to have done an episiotomy? around across the bed. The patient’s hips No. A second degree tear is preferable to an and knees should be flexed so that her knees episiotomy. A second degree tear is easier to almost reach her shoulders. The infant’s head repair, heals faster and causes less pain and should be firmly held between both hands discomfort than an episiotomy. and pulled downwards (posteriorly) while an
  • 11. THE SECOND STAGE OF LABOUR 83 assistant, at the same time, presses down over the suprapubic area. The amount of downward traction applied should be gradually increased until a reasonable amount of traction is used. 4. What should the further management be if these attempts to deliver the shoulders are not successful? An immediate attempt must be made to deliver the infant’s posterior arm. The person conducting the delivery must place a hand posterior to the fetus in the vagina, flex the infant’s posterior arm at the elbow and pull it out anteriorly over the chest. When the arm is pulled out the posterior shoulder will automatically be delivered as well. The anterior shoulder can now be released by pulling the infant’s head downwards.