Universal drip chamber and spike assembly

Details Universal drip chamber and spike assembly Universal drip chamber and spike assembly

1976-05-24

1977-10-25

Truluck, Dalton L.

Surgery

Respiratory method or device

Ozone or ion generation

137399, A61M 516

Patent

active

040551768

ABSTRACT:
Universal drip chamber and spike assembly for use with a source of intravenous liquid contained in a bottle having a neck with a permeable stopper disposed in the neck and for use with a tube adapted to be connected to a patient. The Universal drip chamber comprises a body defining the upper portion of a drip chamber. The drip chamber body has a relatively rigid substantially transparent wall surrounding the upper portion of the chamber and being open at its lower end. A drip chamber booth formed of a flexible rubber-like material is secured to the lower end of the said drip chamber body and defines the lower portion of the drip chamber. The booth has an outlet flow passage extending through the lower extremity of the same and is in communication with the drip chamber. The booth has means forming a valve seat in the lower portion of the drip chamber surrounding the outlet flow passage. A ball capable of floating in said liquid is disposed in said drip chamber and is capable of engaging said valve seat to prevent the flow of liquid from said drip chamber through the outlet flow passage in said booth. The booth is sufficiently compliant so that it can be squeezed by hand to dislodge the ball from the valve seat. The booth has sufficient length above the seat so that when the ball is disposed in the seat, the booth can be squeezed by hand without lodging the ball to pump liquid into the drip chamber. The spike assembly has a first flow passage therein in communication with the drip chamber whereby when the spike is completely inserted into the stopper in the bottle, fluid can pass from the bottle into the drip chamber. The spike assembly is provided with first and second steps with the second step being closer to outer end of the spike assembly than the first step. The first flow passage opens through the first step. The spike assembly is provided with a second flow of passage which is formed in the spike assembly and has one end opening through the second step and has the other end open to the atmosphere. Hydrophobic air filter means is disposed in the second flow passage so that air passing from the atmosphere and through said second passage must pass through the hydrophobic filter.

REFERENCES:
patent: 2672051 (1954-03-01), Butler
patent: 2879784 (1959-03-01), Cutter
patent: 3092106 (1963-06-01), Butler
patent: 3316908 (1967-05-01), Burke
patent: 3465784 (1969-09-01), Cofoid
patent: 3521635 (1970-06-01), Koehn

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