1. 9990 Park Meadows Drive
Lone Tree,CO 80124 USA
(Phone) +1.303.703.4906
(Fax) +1.303.867.3927
jleffel@zynexmed.com
www.zynexmed.com
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Hand,Wrist,Forearm,Elbow & Upperarm
Electrode Placement
How a TENS Unit works.
There are two types of nerve fibers that come into play:large
nerve fibers,and small nerve fibers. Pain signals travel along
small nerve fibers. The large nerve fibers are also known as
nociceptive fibers,because they do not transmit pain. The
electrode transmits electrical currents along these fibers. The
TENS unit works by preventing these small nerve fibers from
reaching the brain by stimulating the large nerve fibers. The
larger nerve fibers“close the gate”in the spinal cord,thus
giving pain relief. This is the basis of the“gate control theory
of pain”whereby nociceptive fibers can interfere with signals
from pain fibers,thereby inhibiting pain.

2. 9990 Park Meadows Drive
Lone Tree,CO 80124 USA
(Phone) +1.303.703.4906
(Fax) +1.303.867.3927
jleffel@zynexmed.com
www.zynexmed.com
Hand,Wrist,Forearm,Elbow & Upperarm
Electrode Placement
ELECTRODE PLACEMENT
Place the electrode pads so that they form a box around the surgical site.
When connecting the wires from the control unit to the electrodes,always
form an“X”over the surgical site by using a diagonal connection as illustrated
above. Always be sure that the control unit is turned off before connecting,
disconnecting,repositioning the wires to the unit or electrodes,or replacing
the batteries.
ADJUSTMENT CONTROL
Adjust the two control knobs on the top of the ValuTENS II to the level of highest
intensity without causing discomfort.As the battery begins to lose power the control
setting may have to be increased accordingly.The controls in the battery compartment
have been preset for the recommended levels and should not be touched:
1. The mode switch should be on“M”
2. The timer switch should be set at“C.”
3. Pulse Width should be set at“150.”
4. Pulse Rate should be set at“70.”
Please do not hesitate to contact me if you have questions or concerns.I have listed my mobile phone on the top
of the page for your convenience.If I am unable to answer your call immediately,please leave a message so I may
address your concerns as soon as possible.