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Blood pressure measurement kashif


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This slide summarize all the ways to measure the blood pressure in an very easy manner.This slide specially explains all invasive methods of blood pressure measurement with real world images and examples.

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Blood pressure measurement kashif

  1. 1. Blood Pressure Measurement
  2. 2. Introduction • This technique involves direct measurement of arterial pressure by inserting a catheter (thin, hollow, and flexible tube). • Invasive (intra-arterial) blood pressure (IBP) monitoring is a commonly used technique in the Intensive Care Unit (ICU) and in the operating theatre.
  3. 3. Cont. Introduction • IBP technique also allows accurate blood pressure readings specially the very low pressures, for example in shocked patients. • It allows continuous ‘beat-to-beat’ blood pressure monitoring. • Its complex procedure involves many risks.
  4. 4. The first invasive blood pressure measurement • The first invasive attempt to measure blood pressure was made by Stephen Hales in 1733. • He inserted a glass tube directly into the artery of a horse
  5. 5. Catheterization method types • Generally, this Invasive technique can be divided into two division:  Extravascular Sensor System  Intravascular Sensor System
  6. 6. Extravascular Sensor System • The sensor is located behind the catheter and the vascular pressure is transmitted by hydraulic connection.
  7. 7. catheter
  8. 8. Invasive BP transducer kit
  9. 9. IBP sensor
  10. 10. Percutaneous radial artery cannulation
  11. 11. Steps to: Percutaneous radial artery cannulation (A) The wrist is positioned and the artery identified by palpation. (B) The catheter-over-needle assembly is introduced through the skin and advanced toward the artery. (C) Entry of the needle tip into the artery is identified by the flash of arterial blood in the needle hub reservoir. (D) Needle-catheter assembly is advanced at a lower angle to assure entry of the catheter tip into the vessel. (E) If blood flow continues into the needle reservoir, the catheter is advanced gently over the needle into the artery. (F) The catheter is attached to pressure monitoring tubing while maintaining proximal occlusive pressure on the artery.
  12. 12. Specification • Anesthetic solution (typically 1% lidocaine) is injected intradermally and subcutaneously alongside the artery, using a 25- or 26- gauge needle • A 3-mL syringe with the plunger removed should be used as a blood reservoir • Teflon catheter is the most common one used for radial artery cannulation • The size (20- or 18-gauge) of the catheter • The catheter is advanced at an angle of 30 to 45 degree and lowering with each advance to ensure that catheter enters the vessel lumen
  13. 13. Advantages of direct arterial blood pressure measurement • Arterial blood sampling • Continuous real-time monitoring • Intentional pharmacologic or mechanical cardiovascular manipulation • Failure of indirect blood pressure measurement • Supplementary diagnostic clues.
  14. 14. Implantation technique for blood pressure measurement • A novel less-invasive blood pressure monitoring system involve the principle: if a blood vessel is pressed against a flat surface of a pressure sensor diaphragm until vessel flattening occurs, according to Laplace’s law the pressure measured by the sensor will be approximately equal to the pressure inside the vessel
  15. 15. Implantable blood pressure monitoring system
  16. 16. Prototype implantable blood pressure monitoring cuff with rigid isolation ring
  17. 17. Implant electronic system architecture
  18. 18. Blood pressure