Infiltration indicator and alarm
US4784648A · kind A · utility
20Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/16854
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In an infusion system, a source of pressurized liquid infusate is connected to the upstream end of a small-bore flow restrictor and drives a flow of infusate therethrough; the downstream end of the flow restrictor is connected to the patient. The infusate at the upstream end is in communication with an annulus inflatable by infusate pressure of at least 200 to 500 Torr; the infusate at the downstream end is in communication with another annulus inflatable by infusate pressure of only 35 to 110 Torr, as occurs during infiltration. Inflation of an annulus provides a visible indication and can provide electrical contact for an alarm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.