Surgical cutting instrument
First Claim
1. A surgical cutting instrument comprising:
- a diaphragm assembly connectable to a source of pressure,an inner cutter operatively connected to said diaphragm assembly, connectable to a source of vacuum, and defining a cutting surface,an outer cutter positioned outside of said inner cutter and defining a suction port,a biasing means for biasing said inner cutter against the bias caused by the force of the source of pressure on said inner cutter via said diaphragm assembly,said biasing means and the operation of the source of pressure causing said cutting surface to reciprocate relative to said port and to thereby cut the matter drawn into said port by the operation of the source of vacuum,an adjustment means connected to said inner cutter for adjusting the normal position of said cutting surface relative to said port, anda body member secured to said outer cutter, and said adjustment means comprising an adjustment nut threaded on said body member and operatively connected to said inner cutter such that as said adjustment nut is threaded on said body member the longitudinal position of said cutting surface relative to said port is adjusted.
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0 Petitions
Accused Products
Abstract
A surgical cutting instrument such as for use in intraocular surgery having a handpiece with an elongate probe extending foward from it. The probe has an elongate stationary outer cutter with a port at its tip and an elongate inner cutter with a cutting surface coaxially disposed therein. The interior of the inner cutter communicates with a vacuum source. A spring and diaphragm assembly in the handpiece and powered by a low pressure pump causes the inner cutter to rapidly reciprocate axially in the outer cutter, and body material, such as vitreous material, drawn in through the port by the vacuum source is thereby chopped by the cutting surface and aspirated out of the patient'"'"'s body through the handpiece. A large adjustment nut on the handpiece allows the size of the port to be easily adjusted. Irrigation fluid can be provided at the surgical site through an infusion cap which is adjustable both longitudinally and rotatably on the handpiece.
230 Citations
34 Claims
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1. A surgical cutting instrument comprising:
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a diaphragm assembly connectable to a source of pressure, an inner cutter operatively connected to said diaphragm assembly, connectable to a source of vacuum, and defining a cutting surface, an outer cutter positioned outside of said inner cutter and defining a suction port, a biasing means for biasing said inner cutter against the bias caused by the force of the source of pressure on said inner cutter via said diaphragm assembly, said biasing means and the operation of the source of pressure causing said cutting surface to reciprocate relative to said port and to thereby cut the matter drawn into said port by the operation of the source of vacuum, an adjustment means connected to said inner cutter for adjusting the normal position of said cutting surface relative to said port, and a body member secured to said outer cutter, and said adjustment means comprising an adjustment nut threaded on said body member and operatively connected to said inner cutter such that as said adjustment nut is threaded on said body member the longitudinal position of said cutting surface relative to said port is adjusted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32)
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30. A surgical cutting instrument comprising:
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a diaphragm assembly connectable to a source of pressure, an inner cutter operatively connected to said diaphragm assembly, connectable to a source of vacuum, and defining a cutting surface, an outer cutter positioned outside of said inner cutter and defining a suction port, a biasing means for biasing said inner cutter against the bias caused by the force of the source of pressure on said inner cutter via said diaphragm assembly, said biasing means and the operation of the source of pressure causing said cutting surface to reciprocate relative to said port and to thereby cut the matter drawn into said port by the operation of the source of vacuum, and a body member secured to said outer cutter, an adjustment nut threadably received on said body member, an end cap, an adapter disposed between said adjustment nut and said end cap, and said adapter being operatively connected to said diaphragm assembly such that, when said adjustment nut is turned on said body member, said inner cutter is moved relative to said body member to thereby adjust the position of said cutting surface relative to said port.
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33. A surgical cutting instrument comprising:
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a diaphragm assembly connectable to a source of pressure, an inner cutter operatively connected to said diaphragm assembly, connectable to a source of vacuum, and defining a cutting surface, an outer cutter positioned outside of said inner cutter and defining a suction port, a biasing means for biasing said inner cutter against the bias caused by the force of the source of pressure on said inner cutter via said diaphragm assembly, said biasing means and the operation of the source of pressure causing said cutting surface to reciprocate relative to said port and to thereby cut the matter drawn into said port by the operation of the source of vacuum, and an end cap to which a distal end of said diaphragm assembly is secured, and said end cap defining an end cap opening through which the source of vacuum can communicate with said port, said diaphragm assembly includes a distal portion thereof extending out through said end cap opening.
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34. A surgical cutting instrument comprising:
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a diaphragm assembly connectable to a source of pressure, an inner cutter operatively connected to said diaphragm assembly, connectable to a source of vacuum, and defining a cutting surface, an outer cutter positioned outside of said inner cutter and defining a suction port, a biasing means for biasing said inner cutter against the bias caused by the force of the source of pressure on said inner cutter via said diaphragm assembly, said biasing means and the operation of the source of pressure causing said cutting surface to reciprocate relative to said port and to thereby cut the matter drawn into said port by the operation of the source of vacuum, and an end cap to which a distal end of said diaphragm assembly is secured, and said end cap defining an end cap opening through which the source of vacuum can communicate with said port, said diaphragm assembly defines an expandable and contractible bellows portion positioned entirely within said end cap.
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Specification