Related Experiment Videos
Physiology of nonpulsatile circulation: acute versus chronic support
1Department of Cardiovascular Surgery, Providence Seattle Medical Center, Washington, USA.
ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|June 9, 1999
Summary
Mammals can adapt to non-pulsatile circulation for long-term support, as adequate pressure and flow are key. Pulsatile flow offers acute benefits like improved lymphatic and capillary perfusion, but these advantages may diminish with chronic adaptation.
Area of Science:
- Cardiovascular physiology
- Biomedical engineering
Background:
- Mammalian adaptation to circulatory support.
- Importance of pulsatile vs. non-pulsatile flow.
Purpose of the Study:
- To investigate the physiological effects of pulsatile and non-pulsatile circulation.
- To determine the requirements for chronic circulatory support.
Main Methods:
- Review of existing literature on mammalian circulatory support.
- Analysis of physiological parameters under different flow conditions.
Main Results:
- Mammals adapt to non-pulsatile circulation for chronic support; pressure and flow are critical.
- Pulsatile flow shows acute advantages: enhanced lymphatic flow, reduced systemic vascular resistance, improved perfusion, and shock reversal.
- These acute benefits of pulsatile flow may not persist with chronic adaptation.
Conclusions:
- Chronic circulatory support primarily requires adequate pressure and flow, not necessarily pulsatility.
- Pulsatile flow offers transient benefits in acute settings, particularly for perfusion and shock management.
- Long-term adaptation suggests a reduced necessity for pulsatile flow in mammalian circulatory systems.