Apparatus for the placement of a medullary space blocker

Details Apparatus for the placement of a medullary space blocker Apparatus for the placement of a medullary space blocker

1996-01-02

1998-08-04

Tucker, Guy V.

Surgery

Instruments

Orthopedic instrumentation

606 95, A61B 1756

Patent

active

057887039

ABSTRACT:
A tubular guide part which is insertable into the medullary space is connected to a source of pressure medium and to a blocking element having the form of a hollow body which can be inflated in the manner of a balloon. The hollow body is inflated via the supply of pressure medium from a basic position situated in the cross-sectional region of the guide part into an expanded position in which the hollow body seals off one portion of the medullary space, which is to be filled with bone cement and is to receive a prosthesis shaft, from a neighboring portion of the medullary space. After insertion of a part of the prosthesis shaft into the bone cement bed, the hollow body can be shrunk into its basic position by the removal of pressure medium and withdrawn from the medullary space together with the guide part. The cavity in the bone cement bed ensuing therefrom is filled up by bone cement expelled during insertion of the remaining portion of the prosthesis shaft. In this manner, a medullary space blocker is provided which can be temporarily installed in the medullary space and then removed before the final curing of the bone cement.

REFERENCES:
patent: 4399814 (1983-08-01), Pratt
patent: 4462394 (1984-07-01), Jacobs
patent: 4488549 (1984-12-01), Lee
patent: 4627434 (1986-12-01), Murray
patent: 4815454 (1989-03-01), Dozier
patent: 5078746 (1992-01-01), Garner
patent: 5147366 (1992-09-01), Arroyo et al.
patent: 5468245 (1995-11-01), Vargas, III

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