Endoscopic instrument
US5290308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Jul 15, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/2929
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention is a lightweight endoscopic instrument which has a flushing port with a check valve assembly therein. The check valve retains carbon dioxide which is used during endoscopic procedures. Upon removal of the instrument, a pressurized fluid can be connected to the flush port, with internal seals directing the pressurized fluid through an annular space between the stem of the instrument and a central actuating rod or element so that any tissue or blood which may have entered into such annular space is flushed out the distal end of the instrument. The instrument features a knob allowing it to rotate on its longitudinal axis while having a handle that can be held in a fixed position by the surgeon. An index mechanism is provided to audibly and/or visually give an indication at preset increments of rotation. The instrument is lightweight to decrease fatigue and is simply and economically constructed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.