Endoscopic instrument with cutting tool
First Claim
1. An endoscopic instrument, havinga shaft for introduction into a duct-like body passage, said shaft having a periphery, an endoscopic optical system extending through said shaft, a cutting tool arranged in said shaft, said cutting tool moveable between a retracted position where said cutting tool is completely recessed inside said shaft and an extended position where said cutting tool extends out of said shaft beyond said periphery of said shaft, and wherein in said extended position, said cutting tool is arranged for introducing an incision in said body passage in a circumferential direction, a displacement mechanism for moving said cutting tool between said retracted position and said extended position;
- and said cutting tool is a blade whose cutting edge is oriented in said circumferential direction of said periphery of said shaft.
3 Assignments
0 Petitions
Accused Products
Abstract
An endoscopic instrument with cutting tool has a shaft for introduction into duct-like body passages such as a rectum, trachea, or esophagus, and has an endoscopic optical system. Arranged in said shaft is a cutting tool, for introducing an incision in the circumferential direction of said body passage, that by way of a displacement mechanism can be extended out of said shaft beyond the periphery of said shaft and retracted back thereinto.
-
Citations
28 Claims
-
1. An endoscopic instrument, having
a shaft for introduction into a duct-like body passage, said shaft having a periphery, an endoscopic optical system extending through said shaft, a cutting tool arranged in said shaft, said cutting tool moveable between a retracted position where said cutting tool is completely recessed inside said shaft and an extended position where said cutting tool extends out of said shaft beyond said periphery of said shaft, and wherein in said extended position, said cutting tool is arranged for introducing an incision in said body passage in a circumferential direction, a displacement mechanism for moving said cutting tool between said retracted position and said extended position; - and
said cutting tool is a blade whose cutting edge is oriented in said circumferential direction of said periphery of said shaft. - 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)
- and
-
24. A method for introducing an incision into a wall of a duct-like body passage, comprising the steps of
providing an instrument having a shaft for introduction into said duct-like body passage and a cutting tool disposed within said shaft that by way of a displacement mechanism can be extended out of said shaft beyond a periphery of said shaft, introducing said instrument with said cutting tool in its retracted position into said body passage such that said periphery of said shaft is positioned at a portion of said wall where said incision is to be introduced, extending said cutting tool beyond said periphery of said shaft by way of said displacement mechanism whereby said cutting tool engages said wall, turning said shaft about its longitudinal axis thereby introducing said incision into said wall of said body passage in a circumferential direction.
Specification