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

A - Human Necessities

61

M

128/82

A61M 1/00 (2006.01)

Patent

CA 1088835

Abstract of the Disclosure A method and apparatus for infusing fluids into the human body includes a peristaltic-type pump and an administra- tion 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.

270591

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