| 摘要 |
A hollow screw (1) has a section (3) at the patient end radially sprung by longitudinal slots (6) which has outwardly directed supporting surfaces (4) perpendicular to the longitudinal direction. The hollow screw (1) is transfixed by an expanding sleeve (10) which can be inserted or screwed into the hollow screw (1) and thus expands the radially sprung section (3) with the supporting surfaces (4). Thus the supporting surfaces (4) bear on the inner surface of the skull in the manner of an expanding anchor. The skull bones are finally clamped between the supporting surfaces (4) and the locknut (20) by means of said locknut (20). On the instrument side, the expanding sleeve (10) has a medicinal coupling (12). The cerebral pressure measuring probe screw of the invention largely excludes the possibility of incorrect manipulations and ensures correct positioning regardless of the thickness of the skull. |
