Catheter flushing apparatus
US4291702A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Jun 25, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4245
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A flow control apparatus is disclosed which is particularly useful in liquid flow systems for blood pressure monitoring in humans and other animals. A resiliently biased valve plunger is provided with a marine bore capillary passage extending from one side of the plunger seating area to the other, thus establishing a first, low flow path. When the plunger is moved from its seat, a second, high flow path is established which flushes the apparatus. In one embodiment, the apparatus is combined with a pressure transmitting diaphragm assembly used to transmit pressure to instrumentation, the flush flow then serving to sweep air from the plenum above the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.