Cannula for an arthroscope
First Claim
1. A cannula for use with an endoscope surgical instrument comprisinga hollow tubular member having an inner and outer wall for surrounding an endoscope element said cannula having a plurality of separate support segments extending inwardly from said inner wall for supporting the endoscope element said support segments defining an open space between adjacent support segments and the interior of said hollow tubular member and attachment means at one end of said tubular member for attachment of said tubular member to a source of fluid and suction.
2 Assignments
0 Petitions
Accused Products
Abstract
A tubular cannula having inwardly radially directed projections for closely supporting an arthroscopic viewing element is disclosed. The use of radially directed projections to support the arthroscopic viewing element permits the creation of an increased volumetric space between the inside wall of the cannula and the arthroscopic viewing element, thereby permitting an increased fluid flow during an operation using the device while at the same time increaseing the support for the arthroscope.
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Citations
15 Claims
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1. A cannula for use with an endoscope surgical instrument comprising
a hollow tubular member having an inner and outer wall for surrounding an endoscope element said cannula having a plurality of separate support segments extending inwardly from said inner wall for supporting the endoscope element said support segments defining an open space between adjacent support segments and the interior of said hollow tubular member and attachment means at one end of said tubular member for attachment of said tubular member to a source of fluid and suction.
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9. An endoscope comprising of the combination of a hollow cannula for use with an arthroscope of the type including an arthroscope viewing element and a cannula for housing and protecting said arthroscope
said cannula having arthroscope supporting means extending inwardly from the inside wall of said cannula, said supporting means having a length greater than the thickness of the wall of said cannula said cannula having connecting means at one end for connecting said cannula to a source of fluid and suction.
Specification