| 摘要 |
PCT No. PCT/US83/00347 Sec. 371 Date Nov. 3, 1983 Sec. 102(e) Date Nov. 3, 1983 PCT Filed Mar. 15, 1983 PCT Pub. No. WO83/03190 PCT Pub. Date Sep. 29, 1983.A subarachnoid bolt for use in measuring intracranial pressure includes a lower bolt half and an upper bolt half which can be screwed to the lower bolt half. A tubular member extends downwardly from the lower bolt half and is adapted to be inserted into a hole formed in a patient's skull. In one embodiment, the bolt is securely held in place when the free end of a tubular element carried by the upper bolt half enters the tubular member and cams the lowermost end thereof radially outwardly when the two bolt halves are screwed together. In a second embodiment, a sleeve on the lower bolt half bulges outwardly against the walls of the hole when the two bolt halves are screwed together.
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