I.V. drip chamber with built-in pump activated by external means

Details I.V. drip chamber with built-in pump activated by external means I.V. drip chamber with built-in pump activated by external means

1986-03-05

1987-08-11

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 65, 604251, 128DIG12, A61M 514

Patent

active

046859128

ABSTRACT:
A flexible tube is mounted on top of the drip chamber. The top of the tube is connected to the spike via a one-way ball-type valve. The bottom of the tube is connected to the drip chamber via a duck-bill-type valve inside of the drip chamber. The duck-bill is held closed against head pressure by a metal spring clip acting on the lip. The duck-bill will open when the tube is squeezed and fluid will be injected into the drip chamber.
The drip chamber is charged bubble-free by the use of an output tube open to the chamber and joined to the flexible tubing carrying the hypodermic needle. During the initial fill the output tube is positioned above the fluid level and air in the chamber vented via the output tube, the flexible tubing and the hypodermic needle. When the desired level is reached, the output tube is submerged and bubble-free fluid fills the output tube, the flexible tubing, and the hypodermic needle.

REFERENCES:
patent: 2208032 (1940-07-01), Hooper
patent: 2907325 (1959-10-01), Burke
patent: 2989052 (1961-06-01), Broman
patent: 3021841 (1962-02-01), Burke
patent: 3527226 (1970-09-01), Hakim
patent: 3664339 (1972-05-01), Santomieri
patent: 3683929 (1972-08-01), Holter
patent: 3832999 (1974-09-01), Crilly
patent: 4038983 (1977-08-01), Mittleman et al.
patent: 4332255 (1982-06-01), Hakim et al.
patent: 4409991 (1983-10-01), Eldridge

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