Head position, intracranial pressure, and compliance

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Abstract
The effect of head position on intracranial pressure (ICP) and intracranial compliance was determined in 19 consecutive ICU patients. Ten had lower ICPs with the head raised 60 degrees, two were lower at 0 degrees, and seven were unchanged. Compliance improved with head elevation in five patients, improved with head lowering in four, and was unchanged in 10. The use of subarachnoid screw devices for compliance measurements was validated by simultaneously recording intraventricular and subarachnoid pressures in four patients. Optimal head positioning for patients with raised ICP should be established individually rather than routinely caring for patients with the head elevated.

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