Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1977-01-24
1979-09-11
Envall, Jr., Roy N.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
128214A, 219502, 219494, 219330, 219309, H05B 102
Patent
active
041676637
ABSTRACT:
An apparatus for warming blood and other parental fluids as they are infused through a disposable flow system includes a pair of heating elements which heat the blood as it passes through a warming bag provided in the flow system. The heating elements are recurringly switched on and off with a duty cycle dependent on both the temperature of the blood at the output of the warming bag, and the temperature differential between the output and input of the bag to maintain the blood at a predetermined temperature independent of flow rate. A duty cycle alarm circuit senses current supplied to the heating elements and trips the main circuit breaker of the apparatus to terminate operation in the event current is continuously applied over a predetermined interval of time, and temperature range and door alarm circuits sound an alarm if the output temperature of the blood falls outside of a predetermined range or if the operator attempts to remove the warming bag from the apparatus while the apparatus is in operation.
REFERENCES:
patent: 3484651 (1969-12-01), Riley
patent: 3590215 (1971-06-01), Anderson
patent: 3614385 (1971-10-01), Horstmann
patent: 3742188 (1973-06-01), Sundbye
patent: 3821516 (1974-06-01), Hayes et al.
patent: 3903395 (1975-09-01), Hamstra
patent: 3903883 (1975-09-01), Pecina et al.
patent: 3925139 (1975-12-01), Simmons
patent: 3946200 (1976-03-01), Juodikis
Froehlich Robert J.
Granzow, Jr. Daniel B.
Baxter Travenol Laboratories Inc.
Collins Henry W.
Envall Jr. Roy N.
Flattery Paul C.
Gerstman George H.
LandOfFree
Blood warming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blood warming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blood warming apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-478924