Surgical stapling and cutting instrument with manually retractable firing member
US7490749B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2007 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Apr 16, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/0811
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required to fire (i.e., staple and sever) the end effector. A linked transmission reduces the required handle longitudinal length, yet achieves a rigid, strong configuration when straightened for firing. A traction biased firing mechanism avoids binding in driving this straightened linked rack. The instrument further has a manually actuatable retraction system that does not require the use of additional springs or other mechanisms to generate retraction forces which must be overcome when generating the forces necessary to fire the device. In various embodiments, the retraction system provides a visual indication to the surgeon as to how far firing has progressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.