Tubular shaft instrument
First Claim
Patent Images
1. A tubular shaft instrument for separating tissue, comprising:
- a tubular shaft;
a first and a second mouth part each having at least one clamping surface for fixing tissue in a fixing plane which extends along a longitudinal axis of the instrument, whereby at least one of the mouth parts is joined to the tubular shaft; and
a cutting device having a blade that is for cutting of the fixed tissue and that is displaceable in a cutting direction by means of an actuating device,wherein at least one of the mouth parts comprises an opening extending along the cutting direction, which forms a blade guide for guiding the blade during cutting,wherein the blade is displaceably guided substantially parallel to the fixing plane and is preloaded with a force that is perpendicular to the fixing plane during cutting by means of a preloading device, andwherein the blade is curved such that the blade glides over the tissue preloaded in the fixing plane when moved back and forth within the blade guide.
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Abstract
The present application relates to a tubular shaft instrument for separating tissue. The invention relates to a tubular shaft instrument that results in a more reliable, cleaner separation of tissue. To achieve this, in contrast to conventional cutting devices, the blade is not displaced through the fixed tissue, but glides over the latter until a complete separation is ascertained.
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Citations
28 Claims
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1. A tubular shaft instrument for separating tissue, comprising:
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a tubular shaft; a first and a second mouth part each having at least one clamping surface for fixing tissue in a fixing plane which extends along a longitudinal axis of the instrument, whereby at least one of the mouth parts is joined to the tubular shaft; and a cutting device having a blade that is for cutting of the fixed tissue and that is displaceable in a cutting direction by means of an actuating device, wherein at least one of the mouth parts comprises an opening extending along the cutting direction, which forms a blade guide for guiding the blade during cutting, wherein the blade is displaceably guided substantially parallel to the fixing plane and is preloaded with a force that is perpendicular to the fixing plane during cutting by means of a preloading device, and wherein the blade is curved such that the blade glides over the tissue preloaded in the fixing plane when moved back and forth within the blade guide. - 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)
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28. A tubular shaft instrument for separating tissue, comprising:
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a tubular shaft; a first and second mouth part each having at least one clamping surface for fixing tissue in a fixing plane, whereby at least one of the mouth parts is joined to the tubular shaft; and a cutting device having a blade that is for cutting of the fixed tissue and that is displaceable in a cutting direction by means of an actuation device, wherein the blade is displaceably guided substantially parallel to the fixing plane and is preloaded against the fixing plane during cutting by means of a preloading device, wherein the preloading device comprises a resilient guide wire having a curvature or a resilient guide rail, whereby the guide wire/rail is substantially rigidly joined to the blade and is guided in the tubular shaft in such a manner that the blade is preloaded in relation to the tubular shaft in the direction of the fixing plane.
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Specification