Drip chamber assembly

Details Drip chamber assembly Drip chamber assembly

1980-03-17

1985-10-22

Johnson, Richard J.

Surgery

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

Treating material introduced into or removed from body...

604251, A61M 516

Patent

active

045486000

ABSTRACT:
A drip chamber assembly is provided which includes a chamber that is flexible but is non-collapsible under a negative pressure condition. The chamber, being flexible, yields to priming easily, but when restriction is added to the inlet port the chamber will not collapse and aspirate air to the patient. A flexible chamber is formed of a vinyl plastic material having a thickness of about 0.04 inch to 0.08 inch and a durometer reading of about 61 shore A to 81 shore A. End caps rigidly support each of the ends of the chamber with the end caps each having a contact length along the chamber of at least 0.2 inch.

REFERENCES:
patent: 2837091 (1958-06-01), McMinn
patent: 3465784 (1969-09-01), Cofoid
patent: 3478184 (1969-11-01), Cofoid
patent: 3970084 (1976-07-01), Raines
patent: 4037597 (1977-07-01), Forberg
patent: 4038983 (1977-08-01), Mittleman
patent: 4173223 (1979-11-01), Raines
patent: 4175558 (1979-11-01), Hess
patent: 4222407 (1980-09-01), Ruschke et al.

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