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[Experimental studies of pulsatile retrograde cerebral perfusion]
1Second Department of Surgery, Shiga University of Medical Science, Japan.
[Zasshi] [Journal]. Nihon Kyobu Geka Gakkai
|February 1, 1994
Summary
Pulsatile flow during retrograde cerebral perfusion offers brain protection during hypothermic circulatory arrest. This pulsatile flow may help control brain edema compared to non-pulsatile flow in dogs.
Area of Science:
- Cardiovascular Surgery
- Neuroscience
- Hypothermia Research
Context:
- Profound hypothermic circulatory arrest (HCA) is used in complex surgeries but carries risks of cerebral injury.
- Retrograde cerebral perfusion (RCP) aims to mitigate these risks by perfusing the brain backward.
- The impact of flow pulsatility on RCP efficacy remains an area of investigation.
Purpose:
- To investigate the effects of pulsatile versus non-pulsatile retrograde cerebral perfusion (RCP) on brain protection during profound hypothermic circulatory arrest (HCA).
Summary:
- This study compared pulsatile RCP (P-RCP) and non-pulsatile RCP (NP-RCP) in dogs undergoing 60 minutes of HCA at 20°C.
- Measurements included regional cerebral blood flow (rCBF), cerebrospinal fluid pressure (CSFP), and cerebral tissue adenosine triphosphate (ATP) and water content.
- Both P-RCP and NP-RCP maintained higher CSFP and ATP levels than HCA alone.
- Significantly lower cerebral tissue water content was observed in the P-RCP group compared to NP-RCP.
Impact:
- Retrograde cerebral perfusion demonstrates protective effects on the brain during circulatory arrest.
- Pulsatile flow during RCP may offer an advantage in mitigating cerebral edema formation compared to non-pulsatile flow.
- Findings suggest pulsatile RCP could be a valuable technique for enhancing brain protection in HCA procedures.