Endoscopic suction instrument having variable suction strength capabilities
US5295956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Oct 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S604/902
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An endoscopic suctioning instrument with variable suction is disclosed. The instrument has a hollow cannula having a proximal end and a distal end, and sliding sleeve having a proximal end and a distal end and a longitudinal axis, with the sliding sleeve being coaxial to and closely surrounding and slidingly engaging the hollow cannula. The sliding sleeve has a plurality of lateral holes at its distal end with the lateral holes being spaced along the longitudinal axis. A valve is provided for selectively coupling a suction source to the proximal end of the cannula, and a sleeve actuation mechanism is provided for sliding the sliding sleeve from a first position where the distal end of the sliding sleeve extends beyond the distal end of the cannula such that a first number of the lateral holes are unblocked by said cannula, to a second position where the distal end of the sliding sleeve extends beyond said distal end of the cannula such that fewer lateral holes are unblocked by said cannula, to a third position where the cannula blocks all of said lateral holes of the sliding sleeve. Various embodiments are described with different mechanisms for causing the sleeve to slide, includi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.