Microsurgical instrument

Details Microsurgical instrument Microsurgical instrument

1992-04-08

1993-11-23

Rosenbaum, C. Fred

Surgery

Instruments

Cutting, puncturing or piercing

606167, 606170, A61B 1732

Patent

active

052639584

ABSTRACT:
A microsurgical instrument especially for ocular surgery including a hub having an axis with an axial bore in the proximal end and being receivable of a piston. In the distal end the bore is receivable of a tube, the piston and the tube being coaxial with the axis of the hub. A piston with an internal axial bore is disposed in the bore of the hub and is reciprocally movable along the axis. A face is disposed at one end of the piston and is adapted to engage a driver to provide movement of the piston on the axis. A tube is disposed in the bore at the distal end of the hub and extends outwardly therefrom. A member is rotatably disposed in the tube and extends outwardly to adjacent the distal end of the tube and inwardly to adjacent to the bore in the piston. Operative parts of the microsurgical instrument are disposed on the distal ends of each of the tube and the member. The parts cooperate with each other to perform a surgical task. Two spiral pathways are formed in the distal end of the piston and a pin is attached to the proximal end of the member and fitted in the spiral pathways whereby to convert longitudinal motion to rotational motion thus enabling operation of the instrument with a minimum of finger pressure.

REFERENCES:
patent: 2708437 (1955-05-01), Hutchins
patent: 3756242 (1973-09-01), Coss
patent: 4258716 (1981-03-01), Sutherland
patent: 4433687 (1984-02-01), Burke et al.
patent: 4499898 (1985-02-01), Knepshield et al.
patent: 4589414 (1986-05-01), Yoshida et al.

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