Surgical cutting instrument for ophthalmic surgery
First Claim
1. A surgical cutting instrument useful in ophthalmic surgery comprisinga cylindrical, hollow body having a front end, a rear end and a centrally disposed chamber therein;
- a front plug received in said front end of said body and having an axial bore therethrough;
a piston disposed in said chamber to be movable in a reciprocating manner toward and away from said front end, said piston carrying sealing means therearound and having a front end, a rear end and an axial bore therethrough with a widened portion adjacent said rear end of said piston;
spring means disposed in said body engaging said front end of said piston to bias said piston away from said front end of said body;
probe means including an elongate tubular outer member having a proximal end secured in said axial bore in said front plug, a closed distal end, and a port adjacent said distal end, and an elongate tubular inner member slidably disposed in said outer member and having a portion fixed in said axial bore in said piston and a distal end movable across said port to provide a cutting action;
a rear plug received in said rear end of said body and having an axial bore therethrough aligned with said probe inner member to permit passage of cut material through said surgical cutting instrument and a second bore therethrough communicating with said chamber for receiving pressure to move said piston and said probe inner member against the bias of said spring means; and
evacuating tube means communicating with said probe inner member and adapted to be connected with a source of suction to draw cut material through said probe inner member.
12 Assignments
0 Petitions
Accused Products
Abstract
A surgical cutting instrument for use in ophthalmic surgery includes a cylindrical body having front and rear plugs in opposite ends thereof with a piston disposed in a centrally disposed chamber in the body, and a probe having an elongate tubular outer member with a proximal end received in an axial bore in the front plug and a closed distal end with a port therein and an elongate tubular inner member slidably disposed in the outer member with a distal end movable across the port to provide a cutting action and a portion fixed in an axial bore in the piston such that the probe inner member is moved with the piston, the rear plug having an axial bore therethrough aligned with the probe inner member to permit evacuation of cut material through the surgical cutting instrument and a second bore therethrough for supplying pressure to the chamber to move the piston against a spring bias. The surgical cutting instrument is designed to be economically disposable by being constructed of a minimal number of parts requiring minimal machining and tooling and capable of quick and simple assembly.
319 Citations
10 Claims
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1. A surgical cutting instrument useful in ophthalmic surgery comprising
a cylindrical, hollow body having a front end, a rear end and a centrally disposed chamber therein; -
a front plug received in said front end of said body and having an axial bore therethrough; a piston disposed in said chamber to be movable in a reciprocating manner toward and away from said front end, said piston carrying sealing means therearound and having a front end, a rear end and an axial bore therethrough with a widened portion adjacent said rear end of said piston; spring means disposed in said body engaging said front end of said piston to bias said piston away from said front end of said body; probe means including an elongate tubular outer member having a proximal end secured in said axial bore in said front plug, a closed distal end, and a port adjacent said distal end, and an elongate tubular inner member slidably disposed in said outer member and having a portion fixed in said axial bore in said piston and a distal end movable across said port to provide a cutting action; a rear plug received in said rear end of said body and having an axial bore therethrough aligned with said probe inner member to permit passage of cut material through said surgical cutting instrument and a second bore therethrough communicating with said chamber for receiving pressure to move said piston and said probe inner member against the bias of said spring means; and evacuating tube means communicating with said probe inner member and adapted to be connected with a source of suction to draw cut material through said probe inner member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification