Medical lavage apparatus and methods
US5667500A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 1995 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | May 25, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2039/2426
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical lavage apparatus for body cavities comprising a housing having parallel irrigation and aspiration cylinders with captive plungers extending in bores thereof from a first end and pairs of check-valves positioned in parallel, smaller, offset cylinders located at second ends such that reciprocal movement of the each plunger in each cylinder performs the function of a one-way pump. The plungers are held captive and aligned by guide-stops proximally disposed in each cylinder. Each plunger comprises a seal disposed at the distal end thereof which inhibits communication between the pairs of check-valves in each cylinder when the plunger is fully seated in the cylinder. Novel jam-free dome shaped, slit check-valves are disposed to be the pair of check-valves in the aspiration cylinder in one embodiment and in irrigation cylinders as well in other embodiments. The dome shaped valves are described for use in other medical fluid control applications, as well. A septum formed of intersecting semi-circular-in-cross-section baffles joins the adjacent outer ends of tale irrigation and aspiration check-valve cylinders so as to allow full fluid streams flowing from these outer ends to flo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.