Apparatus and methods for controlling mixtures of blood and card

Details Apparatus and methods for controlling mixtures of blood and card Apparatus and methods for controlling mixtures of blood and card

1993-06-03

1994-10-25

Prebilic, Paul

Surgery

Blood drawn and replaced or treated and returned to body

604 9, 604 52, 422 44, A61M 3700

Patent

active

053584813

ABSTRACT:
Methods and apparatus are disclosed for variably controlling the ratio of blood to cardioplegia solution to be administered to a patient. A presently preferred embodiment of the apparatus of the invention comprises a multilumen tubing member having a blood supply lumen and three cardioplegia supply lumens, each having approximately the same tubing wall thickness, but having different inside diameters so that causing flow through different combinations of the cardioplegia lumens will result in different ratios of blood to cardioplegia. The four tubes comprising the multilumen tubing member are advantageously connected by web members, thereby facilitating use with a roller pump and minimizing the tangle of tubes.

REFERENCES:
patent: 4257416 (1981-03-01), Prager
patent: 4416280 (1983-11-01), Carpenter et al.
patent: 4701159 (1987-10-01), Brown et al.
patent: 5221255 (1993-06-01), Mahurkar et al.
patent: 5271410 (1993-12-01), Wolzinger et al.
patent: 5322500 (1994-06-01), Johnson et al.

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