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British Journal of Anaesthesia, Vol 80, Issue 5 599-601, Copyright © 1998 by The Board of Management and Trustees of the British Journal of Anaesthesia

CLINICAL INVESTIGATIONS

Cardiovascular disturbances caused by extradural negative pressure drainage systems after intracranial surgery

J. Hernandez-Palazon, J. A. Tortosa, S. Sanchez-Bautista, J. F. Martinez-Lage and D. Perez-Flores
Department of Anaesthesia, Hospital Universitario "Virgen de la Arrixaca", Murcia, Spain; Department of Neurosurgery, Hospital Universitario "Virgen de la Arrixaca", Murcia, Spain; Department of Biostatistics, School of Medicine, University of Murcia, Murcia, Spain

Extradural drainage systems connected to a vacuum device for preventing postoperative haematoma formation are often used in neurosurgical practice. Cardiovascular complications, including bradycardia or low arterial pressure caused by intracranial hypotension, have been described associated with their use. We have investigated the relationship between the negative pressure applied to extradural drainage systems and intracranial pressure (ICP), and analysed the effects of negative pressure of the drains on systolic (SAP), diastolic (DAP) and mean (MAP) arterial pressures and on heart rate (HR). We studied prospectively 15 patients undergoing neurosurgery for supratentorial tumours or aneurysms. Transient decreases in ICP (P < 0.001) and HR (P < 0.001), with no clinical effects, were observed after connecting the vacuum device to the drain. There were no significant changes in SAP, DAP or MAP.
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