Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1983-06-13
1985-07-23
Coven, Edward M.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 67, 128DIG13, A61M 520
Patent
active
045306966
ABSTRACT:
A monitor is described for use with an intravenous injection system of the type that includes an accumulator (18) located between the pump (14) and the needle (28) that connects to the patient's vein. The monitor generates an alarm when there is infiltration (no resistance to outflow, as when the needle withdraws from a vein) or occlusion (the needle is blocked). The monitor includes a pressure sensor (32) coupled to the accumulator, and a circuit (34) which responds to the rate of change of the pressure to operate an alarm when the rate of change exceeds a predetermined amount such as 5 mm Hg, but only when it exceeds that value over a particular time period such as 10 seconds or one minute.
REFERENCES:
patent: 3985133 (1976-10-01), Jenkins et al.
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patent: 4137913 (1979-02-01), Georgi
patent: 4187057 (1980-02-01), Xanthopoulos
patent: 4213454 (1980-07-01), Shim
patent: 4345594 (1982-08-01), Bisern et al.
patent: 4392847 (1983-07-01), Whitney et al.
patent: 4394862 (1983-07-01), Shim
Bisera Jose
Weil Max H.
Coven Edward M.
Institute of Critical Care Medicine
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