Journal of clinical monitoring and computing
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J Clin Monit Comput
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J Clin Monit Comput · Jan 1998
Comparative StudyTranscranial Doppler blood flow velocity versus 133Xe clearance cerebral blood flow during mild hypothermic cardiopulmonary bypass.
Transcranial doppler (TCD) is used during cardiopulmonary bypass (CPB) to assess cerebral emboli and to estimate cerebral perfusion. We sought to compare TCD middle cerebral artery blood flow velocity (Vmca) to 133Xe clearance cerebral blood flow (CBF) measurements during mild hypothermic CPB thus determining its utility in cerebral perfusion assessment. ⋯ These findings suggest that TCD Vmca is a relatively poor correlate of CBF during mild hypothermic CPB.