| 摘要 |
<p>The present invention provides a valve for use in an intravenous set comprising a membrane which when wet will pass parenteral fluid but will not pass air at normal intravenous administration pressures and means for mounting said membrane so that air can bypass said membrane when wet, said mounting means comprising a surface against which said membrane is adapted to seat with an airtight seal, said surface having air passage means formed therein such that air forced through said air passage means will unseat said membrane, said mounting means further comprising means for restraining the movement of said membrane when unseated. The prevent invention also provides a filter for use in an intravenous set comprising a membrane which will filter parenteral fluid and means for confining said membrane including a surface against which said membrane when wet is adapted to seat with an airtight seal at normal intravenous administration pressures, said confining means further comprising means for restraining the movement of said membrane when unseated so that said membrane is confined adjacent to said surface.</p> |
