Endoscopic shaver blade window positioning system
First Claim
1. A method of controlling a powered surgical instrument having a cyclically movable elongated inner tubular member movable relative to a stationary elongated outer tubular member, said outer member having a distal cutting window and said inner member having a cutting means which cyclically covers said cutting window, comprising the steps of:
- providing an indicator means operatively associated with said movable and stationary members for producing a signal representative of the position of said cutting means relative to said cutting window;
determining, in response to said signal, the extent to which said cutting means covers said cutting window to thereby determine the size of the cutting window which is uncovered; and
stopping said movable element in a predetermined position relative to said stationary member to thereby create an uncovered cutting window opening having a predetermined size.
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Accused Products
Abstract
A positioning system for controlling the orientation of the movable elongated inner member relative to the fixed elongated outer member of a surgical instrument. An endoscopic rotatable shaver instrument incorporates a shaver blade assembly adapted to be received in and driven by a handpiece. The movable component of the shaver blade assembly is provided with a position indicator which is read by a sensor in the handpiece in order to control the position at which the inner member is stopped relative to the outer member. The invention is embodied in an apparatus and method enabling use of a shaver blade assembly as an aspirating device or as a probe without any aspirating function.
92 Citations
5 Claims
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1. A method of controlling a powered surgical instrument having a cyclically movable elongated inner tubular member movable relative to a stationary elongated outer tubular member, said outer member having a distal cutting window and said inner member having a cutting means which cyclically covers said cutting window, comprising the steps of:
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providing an indicator means operatively associated with said movable and stationary members for producing a signal representative of the position of said cutting means relative to said cutting window; determining, in response to said signal, the extent to which said cutting means covers said cutting window to thereby determine the size of the cutting window which is uncovered; and stopping said movable element in a predetermined position relative to said stationary member to thereby create an uncovered cutting window opening having a predetermined size. - View Dependent Claims (2, 3, 4, 5)
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Specification