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Blood Flow Sensors and Meters with their working

These are slides about blood flow meters and sensors with introduction to a new technology of flexible sensors that can be used as a lie detector ... slides have prepared by me with a great hardwork on material,animations and transitions.
BLOOD IS A CONTINOUSLY VARYING QUANTITY and hard to measure .it can be magnetized to create polarity so that we measure the blood flow . blood can also be sensed using ultrasonic beams.
and the precious and amazing technology is FLEXIBLE SENSORS that can sense blood and measure its velocity . they can sense even a very very small change in the temprature of blood upto 3 decimal places . So see it in my slides and enjoy . hope u will satisfied by it .

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Blood Flow Sensors and Meters with their working

  1. 1. CONTENTS
  2. 2. An instrument for measuring the velocity of flow of a fluid (as blood) in a tube or pipe Blood flow is a time varying quantity and important parameter to be measured
  3. 3. Need For Blood Flowmeter ? Provides vital info about the oxygen and nutrients to various parts of the body The average velocities of blood flow vary over a wide range depending on diameter of blood vessel. Inspection for block in blood flow. Testing artificial blood vessels during organ transplantation.
  4. 4. Measurement Techniques Electromagnetic Blood Flow meter Ultrasonic Blood Flow Meter Laser Doppler Blood Flow Meter
  5. 5. 1.Electromagnetic Blood Flow Meter Works based on the principle of electromagnetic induction “The voltage induced in a conductor moving in a magnetic field is proportional to the velocity of the conductor” The conductive blood is the moving conductor It is invasive technique Principle Diagram
  6. 6. Electromagnetic Blood Flow Meter
  7. 7. Electromagnetic Blood Flow Meter A permanent magnet or electromagnet positioned around the blood vessel generates a magnetic field perpendicular to the direction of the flow of the blood. Voltage induced in the moving blood column is measured with stationary electrodes located on opposite sides of the blood vessel and perpendicular to the direction of the magnetic field. This method requires that the blood vessel be exposed so that the flow head or the measuring probe can be put across it.
  8. 8. 2.Ultrasonic Blood Flow Meter (principle) Ultrasonic waves are ideal for non-invasive sensing A moving blood cell changes the frequency of sonic waves before and after it. The sonic waves compress before an object and spread out behind it. This frequency shift is the Doppler Effect
  9. 9. Ultrasonic Blood Flow Meter These devices include a transmitter and receiver. Reflective material bounces the transmitted wave back into the receiver. The received wave has a frequency shift. The source frequency is lowered twice. The first shift occurs when the transmitted wave hits the object and the second shift occurs when the resulting wave comes back .
  10. 10. Ultrasonic Blood Flow Meter
  11. 11. 3.Laser Doppler Blood Flow Meter Principle of laser Doppler Flowmetry Red light is emitted from a light source; if the light beam is scattered-off of stationary tissue or cells, there is no shift in the light spectrum. If, however, the light hits a moving cell in a blood vessel there is a shift in the light spectrum of the scattered light according to the Doppler flowmetry
  12. 12.  American National Standards Institute (ANSI) Definition o A device which provides a usable output in response to a specified measured input.  A sensor acquires a physical parameter and converts it into a signal suitable for processing (e.g. optical, electrical, mechanical) Physical Quantity sensor Electrical Quantity
  13. 13. Flexible Sensors (New Technology)
  14. 14. University of Illinois at Urbana- Champaign has developed a flexible electronic sensor that can measure blood flow on top of the skin or, can possibly be implanted onto the tissues themselves Flexible sensor that can stick onto the skin like a temporary tatooo
  15. 15. Flexible sensor The devices are made from a thin array of metallic wires that are oriented around a central sensor and map blood flow as well as pick up on the slight temperature increase that each pulse of blood brings They are coated in a thin layer of silicone, so they are flexible and can stick to the skin like temporary tattoos Can determine temprature to the third decimal place and accurately track the change at that level, it provides a lot of deep insight into physiological health Could potentially be used for lie detector
  16. 16. Blood Flow Measurement Devices Market, by Applications Gastroenterology Diabetes Research Dermatology Peripheral Vascular Diseases Heart attack