Method of screwing an adapter into the human cranium

Details Method of screwing an adapter into the human cranium Method of screwing an adapter into the human cranium

1978-04-20

1980-11-18

Michell, Robert W.

Surgery

Truss

Pad

128310, A61B 1700

Patent

active

042339790

ABSTRACT:
In an illustrated embodiment a hollow tube is drivingly engageable with the adapter which is to be screwed into place in a pre-formed bore in the cranium. A pin reciprocal within the tube has an abutment gauge at its proximal end which is advanced into engagement with the dura mater. A marking system referenced to the pin visually exhibits the progress of the adapter as it is moved into coplanar relation to the abutment gauge. For example the distal end of the pin may reach a position flush with a surface at the distal end of the assembly when the adapter is in the desired exact final position. As another example the hollow tube may have slots therein exposing a mark on the pin so as to visually indicate the progress of the adapter; specifically a transverse element through the pin which may be manually engaged to advance the abutment, may be observed as an index point relative to markings adjacent the slot on the tube.

REFERENCES:
patent: 1327114 (1920-01-01), Rhein
patent: 2663944 (1953-12-01), Rumbaugh
patent: 4026276 (1977-05-01), Chubbuck
patent: 4121572 (1978-10-01), Krzeminski

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