Closely controllable intravenous injection system
US4345594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Sep 12, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus is provided for injecting fluid into a patient over an extended period of time, such as in intravenous feeding of a patient. The apparatus enables close control of injection quantity and rate while assuring an even flow into the patient. The apparatus utilizes relatively simple disposable parts. The apparatus includes an air-operated peristaltic pump which pumps a controlled amount of fluid in each cycle of operation, and a pressure moderator which receives the liquid pulses and supplies an even flow to the patient. The moderator includes a closed chamber, and a resilient tube connected to the pump and having slits that permit the escape of pumped liquid into the chamber. The peristaltic pump includes a flexible but nonresilient tube connected to the container, the nonelasticity assuring that the tube does not expand beyond a predetermined dimension when a vacuum is applied to it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.