Non air-blocking filter

Details Non air-blocking filter Non air-blocking filter

1979-10-19

1981-07-14

Pellegrino, Stephen C.

Surgery

Respiratory method or device

Ozone or ion generation

12814C, 55159, 210927, A61M 516

Patent

active

042780845

ABSTRACT:
A filter assembly is disclosed for use, in-line, in a medical fluid, e.g., parenteral solution, administration set or the like, to filter the fluid as it is administered to a patient. Hydrophobic and hydrophilic filter membranes are mounted in a parallel-flow relationship within a filter housing, which is sealed except for inlet and outlet ports. The membranes are respectively positioned so that the hydrophobic filter membrane is located above the hydrophilic filter membrane when the filter assembly is suspended in-line in an administration set, permitting any air separated from the fluid by the hydrophilic membrane to migrate upwardly and pass through the hydrophobic membrane instead of accumulating on the surface of and blocking flow through the hydrophilic membrane.

REFERENCES:
patent: 3803810 (1974-04-01), Rosenberg
patent: 4004587 (1977-01-01), Jess
patent: 4009714 (1977-03-01), Hammer
patent: 4116646 (1978-09-01), Edwards
patent: 4190426 (1980-02-01), Ruschke
patent: 4200095 (1980-04-01), Reti

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