| 摘要 |
1510072 Filter for parenteral liquids BAXTER TRAVENOL LABORATORIES INC 8 March 1976 [13 June 1975] 9142/76 Heading B1D A filter assembly suitable for use with a parenteral liquid administration apparatus and designed to be non - air - blocking, comprises a housing 52 having a liquid inlet 40 and a liquid outlet 60 and accommodating a filter comprising separate first and second filter members 48, 50 arranged in parallel, one being hydrophilic in nature to allow passage of aqueous liquid and the other being hydrophobic in nature to permit the passage of gas after the filter members have been in contact with aqueous liquid, the filter members being closed from the exterior of the assembly by the housing. The filter members may be fixed in oppositely positioned openings in a tubular support member 43 open at the inlet end but closed at the outlet end. The hydrophilic element may be a copolymer of polyvinyl chloride and acrylonitrile on nylon fabric with an effective pore size of 5 microns or 3 microns. The hydrophobic element may be an organo - silicon treated material of the same composition and pore size or smaller effective pore size, e.g. 3 microns or 1 - 5 microns, or it may be a porous polytetrafluoroethylene membrane. |
