Endosurgical instrument with a radially movable end effector
US5586990A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1995 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | May 8, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/2944
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endosurgical cutting instrument includes a hollow tube having a distal end with a radial slot and an interior deflection surface, a push rod extending through the tube and having a proximally directed sickle blade coupled to its distal end, and a manual actuator coupled to the proximal ends of the tube and the push rod for imparting relative axial movement to the tube and push rod. The sickle blade is a curved member having a sharp concave edge and a dull convex edge and is coupled to the distal end of the push rod with its sharp concave edge facing the push rod. The blade is dimensioned such that it may be substantially completely contained within the tube. The push rod is oriented so that its distal end is free to move in a radial direction as it moves axially. Movement of the push rod against the deflection surface urges the push rod in a radial direction thereby causing the sickle blade to exit the tube through the radial slot. As the sickle blade is moved out of the tube, there is no cutting action since it is the dull convex edge of the blade which faces the tissue adjacent to the tube. Once the blade is deployed outside the tube, cutting is effected by capturing tissue in…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.