T. Plotnikova, G. Nartsissova
Research Institute of Circulation Pathology – Novosibirsk, Russia

Objective: The estimate cerebral blood flow with trascranial doppler in right brachial artery perfusion during hypotermic circulation arrest during the correction of aortic arch aneurysms and dissections.

Material and Methods: Ten patients (mean age of 52±8,3 years) were monitored. We monitored maximum blood flow velocities of bilateral middle cerebral arteries using the transcranial doppler (Multi-Dop T, Oxford Medical) at four periods: after induction of anestesia, during cardiopulmonary bypass, during antegrade cerebral perfusion and after termination of cardiopulmonary bypass. Also we used trascranial doppler monitoring with embol detection.

Results: Maximum blood flow velocity decreased symmetrical in all patients during cardiopulmonary bypass and antegrade cerebral perfusion of hypotermic circulation arrest. Vmax composed 82±13,7 cm/s after induction of anestesia, during cardiopulmonary bypass – 33±5,8 cm/s, during antegrade cerebral perfusion – 46±11,6 cm/s, after termination of cardiopulmonary bypass – 80±10,9 cm/s. During cardiopulmonary bypass maximum blood velocity decreased significantly. No neurologic deficit was observed in any patient after operation.

Discussion: Transcranial doppler monitoring is important method of assessment the cerebral blood flow in operation on aortic arch during hypotermic circulation arrest.

Key words: cerebral perfusion, transcranial monitoring.

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