Consequences of Debris in Circulation from Medical Devices

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SUMMARY

The discussion centers on the consequences of debris, specifically red blood cell membrane vesicles, in circulation due to poorly designed medical devices during surgical procedures. At high shear rates, red blood cells can become elongated and strain, leading to membrane fragments that are not filtered out before blood re-enters the body. While some participants argue that these fragments are insignificant, the real concern lies with blood clots, which can cause severe complications such as stroke, deep vein thrombosis, and pulmonary embolisms. Preventative measures, such as low-dose aspirin, are commonly employed to mitigate these risks.

PREREQUISITES
  • Understanding of shear rates in fluid dynamics
  • Knowledge of red blood cell physiology
  • Familiarity with the function of medical devices in surgical settings
  • Awareness of thromboembolic conditions and their prevention
NEXT STEPS
  • Research the design principles of medical devices to minimize blood cell damage
  • Study the mechanisms of thromboembolism and its clinical implications
  • Explore the role of the liver in filtering blood debris
  • Investigate the effectiveness of low-dose aspirin in preventing blood clots
USEFUL FOR

Medical device engineers, healthcare professionals, and researchers focused on surgical procedures and blood management will benefit from this discussion.

tandoorichicken
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At a high shear rate, red blood cells become elongated and oriented in one direction, facilitating smooth blood flow. However, at a high enough shear rate, the cells will become so strained that a part of the cell membrane pinches off. This often occurs in poorly designed medical devices that keep blood moving through the body during surgery. These membrane vesicles aren't filtered out once the blood passes from the machine back into the body, so my question is, what are the consequences of having these pieces of cell membrane floating around in the circulation?
 
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I think that pieces of cell membrane will do nothing... They are insignicantly small...

It's when you have blood clots being released into the circulation where you can get serious problems... This can lead to life threatening conditions such as stroke, deep vein thrombosis, pulmonary embolsims...etc... people take low doses of aspirin to try and prevent this...
 
Red blood cell debris are cleaned out via the liver, carried with bile into the intestines and removed through the bowel.
 

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