Surgery – Blood drawn and replaced or treated and returned to body
Patent
1986-11-28
1988-10-18
Pellegrino, Stephen C.
Surgery
Blood drawn and replaced or treated and returned to body
604 67, 128691, 417 20, A61M 103, F04B 4900
Patent
active
047784458
ABSTRACT:
A heart/lung bypass system having a centrifugal blood pump driven by a motor detects reverse flow conditions in which blood is flowing from the load to the pump outlet. An alarm control provides an alarm signal based upon a flow magnitude signal, a pump speed (rpm) signal, and a torque signal. When the pump is at a desired initial speed and an arterial flow line from the pump is unclamped, a decrease in torque requirements indicates a reverse flow condition, and an alarm is initiated. Reverse flow conditions are also indicated by an increase in rpm followed by a decrease in flow magnitude, and by a decrease in rpm coupled with an increase in flow magnitude. In addition, when the pump is running at a constant rpm, an increase in flow magnitude followed by a decrease in torque indicates a reverse flow condition, and an alarm is sounded.
REFERENCES:
patent: Re28742 (1976-03-01), Rafferty et al.
patent: 3608088 (1971-09-01), Dorman et al.
patent: 3617151 (1971-11-01), Scroggins et al.
patent: 3647324 (1972-03-01), Rafferty et al.
patent: 3805768 (1974-04-01), Barefoot et al.
patent: 3815582 (1974-06-01), Schuette
patent: 3864055 (1975-02-01), Kletschka et al.
patent: 3881483 (1975-04-01), Sausse
patent: 3882861 (1975-05-01), Kettering et al.
patent: 3957389 (1976-05-01), Rafferty et al.
patent: 3970408 (1976-07-01), Rafferty et al.
patent: 3982535 (1976-09-01), Bahrton
patent: 4037984 (1977-07-01), Rafferty et al.
patent: 4080966 (1978-03-01), McNally et al.
patent: 4108574 (1978-08-01), Bartley et al.
patent: 4135253 (1979-01-01), Reich et al.
patent: 4148314 (1979-04-01), Yin
patent: 4180074 (1979-12-01), Murry et al.
patent: 4309993 (1982-01-01), Brown
patent: 4330238 (1982-05-01), Hoffman
patent: 4444546 (1984-04-01), Pazemenas
patent: 4447191 (1984-05-01), Bilstad et al.
patent: 4468219 (1984-08-01), George et al.
patent: 4541433 (1985-09-01), Baudino
Journal of Thoracic & Cardiovascular Surgery, Nov. 83, vol. 86, No. 5, "Biomedicus".
Clausen Earl W.
Hubbard Lloyd C.
Minnesota Mining and Manufacturing Company
Pellegrino Stephen C.
LandOfFree
Centrifugal blood pump with backflow detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Centrifugal blood pump with backflow detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Centrifugal blood pump with backflow detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1192539