Method and apparatus for metered infusion of fluids

Details Method and apparatus for metered infusion of fluids Method and apparatus for metered infusion of fluids

1977-01-13

1979-05-22

Truluck, Dalton L.

Surgery

Respiratory method or device

Ozone or ion generation

128DIG12, 417477, A61M 500

Patent

active

041553624

ABSTRACT:
A method and apparatus for infusing fluids into the human body includes a peristaltic-type pump and an administration set having a vinyl tubing section on which the pump acts. To prevent the release of dissolved gas in the tubing section and the possible coalescence of released gas bubbles into pockets of air the pressure in the tubing downline of the pump is increased by partially restricting the lumen of the tubing. This restriction also assists in restoring the tubing to its original shape following compression by the peristaltic pump for more accurate metering and more efficient pumping action, and prevents uncontrolled gravity flow in the event of a pump failure. To provide a uniform compression force on the tubing the pressure rollers of the peristaltic pump are individually spring biased against the wall of the tubing, which is held in position by a stationary pressure plate.

REFERENCES:
patent: 2366424 (1945-01-01), Perry
patent: 2393838 (1946-01-01), Tarbox
patent: 2483924 (1949-10-01), Moulinier
patent: 3620650 (1971-11-01), Shaw
patent: 3675653 (1972-07-01), Crowley et al.
patent: 3726613 (1973-04-01), Casimir
patent: 3731680 (1973-05-01), Wright
patent: 3990444 (1976-11-01), Vial
Hannemann et al., Am. Jo. Dis. Child, vol. 125, May 1973, pp. 706-708.

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