Cerebral blood flow during high frequency ventilation in cats.
Cerebral blood flow (CBF) was compared during conventional low frequency ventilation (LFV) [tidal volume 15 ml/kg, respiratory rate 12] and high frequency ventilation (HFV) [tidal volume 3 ml/kg, respiratory rate 100] in normal cats. The intra-arterial 133Xenon technique was used to determine CBF. No significant difference in CBF was present between the 2 groups. The mean CBF was 46.6 +/- 14.2 ml/dl X min during LFV and 44.4 +/- 12.2 ml/dl X min during HFV. Additionally, mean arterial pressure, CVP, intracranial pressure (ICP), cerebral perfusion and airway pressures were not significantly different between the groups. HFV has little effect on cerebral hemodynamics.
D000818:Animals; D001783:Blood Flow Velocity; D002415:Cats; D002560:Cerebrovascular Circulation; D006439:Hemodynamics; D007427:Intracranial Pressure; D012121:Respiration, Artificial; D014692:Ventilation-Perfusion Ratio