Adjustable intracranial pressure measuring screw

摘要

A screw-type device that can be screwed into a hole in the skull for measuring subarachnoid fluid pressure in the head. The screw-type device has an elongated body with a threaded distal end, and an adjustable depth stop means which can be moved along the distal end of the device and clamped to the body of the device to control the amount of penetration of the distal end into the skull. By this means, the exact placement of the distal tip of the device to the inner table of the skull can be achieved for any skull thickness. A through-opening in the body of the device and connection means at the proximal end enables subarachnoid fluid pressures to be measured by external apparatus. The adjustable depth stop provided added advantages of stability, safety, accuracy, universality and convenience.