Infiltration indicator and alarm

Details Infiltration indicator and alarm Infiltration indicator and alarm

1986-09-15

1988-11-15

Pellegrino, Stephen C.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604246, 138 44, A61M 500

Patent

active

047846488

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.

REFERENCES:
patent: 2319498 (1943-05-01), Gerard
patent: 3298367 (1967-01-01), Bergman
patent: 3469578 (1969-09-01), Bierman
patent: 3517700 (1970-06-01), Williams et al.
patent: 3640277 (1972-02-01), Adelberg
patent: 3831588 (1974-08-01), Rinder
patent: 3850348 (1974-11-01), Bessot et al.
patent: 4626243 (1986-12-01), Singh et al.

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