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Establishing In Situ Closed Circuit Perfusion of Lower Abdominal Organs and Hind Limbs in Mice
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Optimal flow rate for antegrade cerebral perfusion.

Takashi Sasaki1, Shoichi Tsuda, R Kirk Riemer

  • 1Stanford University, Division of Pediatric Cardiac Surgery, Department of Cardiothoracic Surgery, 300 Pasteur Drive, Falk Rm CV116C, Stanford, CA 94305-5407, USA. fhanley@stanford.edu

The Journal of Thoracic and Cardiovascular Surgery
|February 24, 2010
PubMed
Summary

Standardizing antegrade cerebral perfusion (ACP) flow rates in neonatal heart surgery is crucial. A rate between 30-50 mL/kg/min for ACP closely matches standard cardiopulmonary bypass conditions, optimizing cerebral blood flow and oxygenation.

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Area of Science:

  • Cardiovascular Surgery
  • Neonatal Medicine
  • Physiology

Background:

  • Antegrade cerebral perfusion (ACP) is vital in neonatal cardiac surgery.
  • Current ACP flow rates lack standardization.
  • Optimizing ACP is key for neuroprotection during surgery.

Purpose of the Study:

  • To determine the optimal antegrade cerebral perfusion flow rate.
  • To identify ACP rates that replicate standard cardiopulmonary bypass conditions.
  • To evaluate the impact of different ACP rates on cerebral hemodynamics.

Main Methods:

  • Neonatal piglets underwent deep hypothermic cardiopulmonary bypass.
  • Antegrade cerebral perfusion was administered at 10, 30, and 50 mL/kg/min.
  • Cerebral blood flow, regional oxygen saturation, and oxygen extraction were measured.

Main Results:

  • An ACP rate of 50 mL/kg/min normalized cerebral blood flow and regional oxygen saturation.
  • An ACP rate of 30 mL/kg/min provided 60% of baseline cerebral blood flow but maintained normal oxygen saturation.
  • Lower ACP rates (10 mL/kg/min) significantly reduced cerebral blood flow and oxygenation.

Conclusions:

  • Antegrade cerebral perfusion rates between 30-50 mL/kg/min are recommended for neonatal heart surgery.
  • These rates aim to balance cerebral blood flow and oxygen delivery with cardiopulmonary bypass standards.
  • Optimized ACP flow is essential for maintaining adequate brain perfusion and preventing hypoxic injury.