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Advanced ventricular assist device ppt

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kaushikbandopadhyay
kaushikbandopadhyay

An advanced ventricular assist device (VAD) is a mechanical circulatory device that replaces the pumping action of a failing heart. It uses a continuous flow pump rather than emulating the heart's pulsing action. Key features include being ECG independent, running soundlessly, and producing a weak pulse. Advanced VADs help treat heart failure but also have shortcomings like coagulation, thrombosis, hemolysis, and infection that researchers continue working to address.

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ADVANCED VENTRICULAR ASSIST DEVICE By Kaushik Bandopadhyay NSEC, BME
What is a Ventricular Assist Device (VAD)? Mechanical circulatory device that is used to replace the pumping action of a failing human heart. Left ventricular failure is primarily treated using a VAD.
Need of Ventricular Assist Device 5 million people suffer from Congestive heart failure (CHF). 2,50,000 patients are in advanced stage of CHF. 50,000 deaths are caused due to ventricular failure alone.
Classification of Ventricular Assist Devices On the basis of period of use: a) Temporary, b) Permanent On the basis of impaired ventricle: a) LVAD, b) RVAD, c) Bi-VAD On the basis of Pumping mechanism: a) Pulsatile b) Non pulsatile
On the basis of suspension of rotors: a) Bearing suspension b) Electromagnetic or Hydrodynamic suspension.
Advanced Ventricular Assist Device Termed as Non pulsatile VAD because the main difference between the pulsatile (earlier version of VADs) and non pulsatile ones is the pumping mechanism. Pulsatile VADs emulated the real contraction phenomenon of ventricles while Advanced VADs use continuous flow mechanisms.
Key features of Advanced VAD Enabled with continuous flow pumps ECG independent Soundless operation Patient has a weak or non-palpable pulse, which is normal, owing to the continuous flow mechanism of the pump Arterial pressure is in the range of (65-90)mm of Hg
Advanced ventricular assist device ppt
Advanced ventricular assist device ppt
The Pump Advanced VADs use continuous flow pumps which are of two types: a) Centrifugal Flow pump b) Axial flow pump
Advanced ventricular assist device ppt
Advanced ventricular assist device ppt
Key Features of Continuous flow pumps Flow: Measured in liters per minute (lpm): 3 to 10 lpm Flow is directly proportional to pump speed. Speed: Measured in rpm: 8000 to 15000rpm Power:
Pulsatility Index (PI): Measure of the pressure difference between VADs pump chamber and the hearts ventricle (if working, partially).
Shortcomings Coagulation and Thrombosis Haemolysis Infection Portability
Conclusion It has been a boon for cardiac patients. Future of VADs look bright as newer technologies and methods are being experimented to make the device better, lighter and easily portable.
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Advanced ventricular assist device ppt

  • 2. What is a Ventricular Assist Device (VAD)? Mechanical circulatory device that is used to replace the pumping action of a failing human heart. Left ventricular failure is primarily treated using a VAD.
  • 3. Need of Ventricular Assist Device 5 million people suffer from Congestive heart failure (CHF). 2,50,000 patients are in advanced stage of CHF. 50,000 deaths are caused due to ventricular failure alone.
  • 4. Classification of Ventricular Assist Devices On the basis of period of use: a) Temporary, b) Permanent On the basis of impaired ventricle: a) LVAD, b) RVAD, c) Bi-VAD On the basis of Pumping mechanism: a) Pulsatile b) Non pulsatile
  • 5. On the basis of suspension of rotors: a) Bearing suspension b) Electromagnetic or Hydrodynamic suspension.
  • 6. Advanced Ventricular Assist Device Termed as Non pulsatile VAD because the main difference between the pulsatile (earlier version of VADs) and non pulsatile ones is the pumping mechanism. Pulsatile VADs emulated the real contraction phenomenon of ventricles while Advanced VADs use continuous flow mechanisms.
  • 7. Key features of Advanced VAD Enabled with continuous flow pumps ECG independent Soundless operation Patient has a weak or non-palpable pulse, which is normal, owing to the continuous flow mechanism of the pump Arterial pressure is in the range of (65-90)mm of Hg
  • 10. The Pump Advanced VADs use continuous flow pumps which are of two types: a) Centrifugal Flow pump b) Axial flow pump
  • 13. Key Features of Continuous flow pumps Flow: Measured in liters per minute (lpm): 3 to 10 lpm Flow is directly proportional to pump speed. Speed: Measured in rpm: 8000 to 15000rpm Power:
  • 14. Pulsatility Index (PI): Measure of the pressure difference between VADs pump chamber and the hearts ventricle (if working, partially).
  • 15. Shortcomings Coagulation and Thrombosis Haemolysis Infection Portability
  • 16. Conclusion It has been a boon for cardiac patients. Future of VADs look bright as newer technologies and methods are being experimented to make the device better, lighter and easily portable.