Surgery – Instruments – Means for inserting or removing conduit within body
Patent
1994-01-05
1995-05-02
Pellegrino, Stephen C.
Surgery
Instruments
Means for inserting or removing conduit within body
606198, A61B 1900
Patent
active
054115078
ABSTRACT:
An instrument is provided which is suitable, inter alia, for the implantation and extraction of stents in hollow body organs. The instrument has an inner first tube and an outer second tube that can be displaced axially relative to each other, and spreading elements that can be directed radially outwardly and flexibly from the longitudinal axis of the instrument for the purpose of holding the stent. The spreading elements can be brought into a position against the stent by means of a displacement of one of the tubes in one direction. The proximal and distal ends of the spreading elements are attached to respective rings which fix the spreading elements at a radial spacing from the longitudinal axis of the instrument. Through displacement of one of the tubes, which acts upon one of the rings, the distance between the rings can be changed, whereby upon reduction of this distance, the spreading elements are deformed, creating outwardly directed bows which exert force against the inner circumference of the stent.
REFERENCES:
patent: 3517128 (1970-06-01), Hines
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patent: 4250873 (1981-02-01), Bonnet
patent: 4885003 (1989-12-01), Hillstead
patent: 4921484 (1990-05-01), Hillstead
patent: 5074871 (1991-12-01), Groshong
patent: 5188630 (1993-02-01), Christoudias
Dawson Glenn
Pellegrino Stephen C.
Richard Wolf GmbH
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