Variable-volume vented container

Details Variable-volume vented container Variable-volume vented container

1985-12-13

1988-09-20

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604405, A61M 500

Patent

active

047722738

ABSTRACT:
An operable variable-volume vented container assembly for use in administering parenteral fluids includes a housing having a chamber for retaining fluid. A distal end portion of the housing has a passsageway therethrough for communicating with the chamber. Venting means communicating between the chamber and the exterior of the housing, for allowing air to enter the housing as fluid leaves the chamber through the passageway, is provided. The venting means includes an air-permeable liquid-impermeable element positioned to allow gases passing through the venting means to pass through the element. The element is porous and capable of developing sufficiently high surface tension under contact to serve as a barrier against liquid passsage therethrough during normal use of the container assembly. A stopper is slidably positioned in fluid tight engagement inside the housing.

REFERENCES:
patent: 3828980 (1974-08-01), Creighton et al.
patent: 3834124 (1974-09-01), Ichikawa
patent: 4340067 (1982-07-01), Rattenborg
patent: 4534757 (1985-08-01), Geller
patent: 4571244 (1986-02-01), Knighton
patent: 4576594 (1986-03-01), Greenland
patent: 4613326 (1986-09-01), Szwarc
patent: 4623343 (1986-11-01), Thompson

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