Surgery – Instruments – Cutting – puncturing or piercing
Patent
1995-01-17
1998-05-05
Buiz, Michael
Surgery
Instruments
Cutting, puncturing or piercing
606184, 128753, A61B 1700
Patent
active
057467609
ABSTRACT:
The BTR device of the present invention preferably comprises a housing chamber with an attached hand grip and actuating ringlet positioned to be grasped and pulled toward the hand grip. Inside the housing chamber is a hollow, open-ended, helically-slotted cylindrical element having a diagonal groove formed within the outer surface. A travelling pin, attached to the actuating ringlet, is fitted within the diagonal groove such that movement of the actuating ringlet simultaneously moves the travelling pin and rotates the helically-slotted cylindrical element. Gear teeth on the helically-slotted cylindrical element engage gear teeth on an inner shaft element rotatably positioned within the helically-slotted cylindrical element such that rotation of the helically-slotted cylindrical element is transferred to the inner shaft element. Rotation of the inner shaft element simultaneously rotates an attached excision sleeve to permit smooth and simple cutting of a uniform tissue fragment which is then removed through the BTR device without the need to withdraw the BTR device from the surgical access site. A tension spring urges the released actuating ringlet to its original position when the pulling force is withdrawn thereby causing the helically-slotted cylindrical element to rotate reversely. The inner shaft element, and attached excision sleeve, however, do not reversely rotate due to a separating coil which prevents engagement of the gear teeth when the pulling force is withdrawn.
REFERENCES:
patent: 4258716 (1981-03-01), Sutherland
patent: 4848338 (1989-07-01), De Satnick et al.
patent: 5002546 (1991-03-01), Romano
patent: 5281220 (1994-01-01), Blake, III
patent: 5342382 (1994-08-01), Brinkerhoff et al.
patent: 5509918 (1996-04-01), Romano
patent: 5522830 (1996-06-01), Aranyl
patent: 5556416 (1996-09-01), Clark et al.
Buiz Michael
Connolly Mulcare Nancy
Laserscope
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