Surgical cutting instrument having a offset probe for ophthalmic surgery
First Claim
1. A surgical instrument useful in ophthalmic surgery comprising:
- a cylindrical, hollow body having a longitudinal axis, a front end, a rear end and a chamber disposed between said front and rear ends;
a piston means disposed in said chamber to be movable in a reciprocating manner toward and away from said front end and having a longitudinal axis;
probe means extending form said front end of said body at a position parallel to and offset from said longitudinal axis of said body including an elongate, tubular outer probe member having a closed distal end and a port adjacent said distal end, and an elongate inner probe member slidably disposed in said outer probe member and having a distal end movable across said port to provide a cutting action, a portion mounted to said piston means to prevent rotation of said piston means and said inner probe member a position offset from said longitudinal axis of said piston and passage means extending along said inner probe member from said distal end to said portion mounted to said piston means;
evacuating means communicating with said probe means to permit passage of cut material through said surgical cutting instrument; and
supply means communicating with said chamber to supply pressure to move said piston means to reciprocate said inner probe member in said outer probe member to produce said cutting action.
0 Assignments
0 Petitions
Accused Products
Abstract
A surgical cutting instrument, particularly useful for ophthalmic surgery, includes a cylindrical body, a piston disposed for reciprocating movement in a chamber in the body and a probe having an elongate tubular outer probe member with a closed distal end and a port adjacent thereto and an elongate inner probe member slidably disposed in the outer probe member with a distal end movable across the port to provide a cutting action and a portion mounted to the piston such that the probe is positioned parallel to the longitudinal axis of the cylindrical body and axially offset therefrom such that the inner and outer probe members are in positive alignment and not subject to relative rotation and inadvertent misalignment. An evacuation tube receives cut material from the probe passing through the surgical cutting instrument and a supply tube supplies pressure to the chamber to reciprocate the piston.
-
Citations
15 Claims
-
1. A surgical instrument useful in ophthalmic surgery comprising:
-
a cylindrical, hollow body having a longitudinal axis, a front end, a rear end and a chamber disposed between said front and rear ends; a piston means disposed in said chamber to be movable in a reciprocating manner toward and away from said front end and having a longitudinal axis; probe means extending form said front end of said body at a position parallel to and offset from said longitudinal axis of said body including an elongate, tubular outer probe member having a closed distal end and a port adjacent said distal end, and an elongate inner probe member slidably disposed in said outer probe member and having a distal end movable across said port to provide a cutting action, a portion mounted to said piston means to prevent rotation of said piston means and said inner probe member a position offset from said longitudinal axis of said piston and passage means extending along said inner probe member from said distal end to said portion mounted to said piston means; evacuating means communicating with said probe means to permit passage of cut material through said surgical cutting instrument; and supply means communicating with said chamber to supply pressure to move said piston means to reciprocate said inner probe member in said outer probe member to produce said cutting action. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A surgical cutting instrument useful in ophthalmic surgery comprising:
-
a body having a front end, a rear end and a chamber disposed between said front and rear ends; a piston means disposed in said chamber to be movable in a reciprocating manner toward and away from said front end, said piston means having a longitudinal axis; probe means extending from said front end of said body at a position parallel to and offset from said longitudinal axis of said piston means including an elongate, tubular outer probe member having a closed distal end and a port adjacent said distal end, and an elongate inner probe member slidably disposed in said outer probe member and having a distal end movable across said port to provide a cutting action, a portion mounted to said piston means at a position offset from said longitudinal axis of said piston means to prevent rotation of said piston means and said inner probe member and passage means extending along said inner probe member from said distal end to said portion mounted to said piston; evacuating means communicating with said probe means to permit passage of cut material through said surgical cutting instrument; and supply means communicating with said chamber to supply pressure to move said piston means to reciprocate said inner probe member in said outer probe member to produce said cutting action. - View Dependent Claims (15)
-
Specification