Adjustable-resistance anti-siphon device
US5192265A · kind A · utility
12Cited by
7References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 10, 1990 |
| Grant date | Mar 9, 1993 |
| Priority date | — |
| Expiry date | Dec 10, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M27/006
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An adjustable-resistance anti-siphon device for a cerebrospinal fluid shunt is provided. The device has a substantially rigid housing having an internal cavity which contains a first chamber and a second chamber, the first chamber having at least one flexible wall, an inlet port and an outlet port, the ports passing through apertures in the housing; the second chamber being gas-filled and being in pressure communication with at least a portion of the at least one flexible wall of the first chamber; and gas pressure control means connected to said gas-filled chamber whereby the pressure in said gas-filled chamber may be adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.