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A new device for long-term intracranial pressure measurement.

This paper described the authors' approach to the problem of long-term intracranial pressure measurement. Several prior devices have not proven useful for clinical studies of more than a few days duration. Study of 22 of the authors' devices in primates has established the validity of both engineering and medical design assumptions. Useful pressure data has been collected for up to 2 months. Redesign to decrease tambour permeability should allow a useful life of months or years.