Infusion method and means
US4850971A · kind A · utility
39Cited by
9References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Feb 23, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/148
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
This invention is an infusion pump utilizing a linear roller driven by a one or more constant force springs in combination with changeable flow regulating needles to provide a constant flow, gravity independent device. The spring constant is chosen so that infusion substantially decreases should the infusion needle become dislodged from the vein and come to rest in the surrounding tissue. Also, there is a means for introduction of an anticoagulant to maintain vein access if a delay is encountered in replacement of the infusion bag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.