Water seal water manometer
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United States of America Patent
Stats
-
Jan 18, 1994
Grant Date -
N/A
app pub date -
Nov 14, 1991
filing date -
Nov 14, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a vacuum regulator apparatus such as for automatically establishing and maintaining a predetermined vacuum for withdrawing fluid from a chest cavity. The apparatus comprises a water manometer or vacuum regulator portion and a water seal portion. Atmospheric air is vented into the vacuum line through the vacuum regulator portion by displacing a predetermined height column of a fluid such as water. A filter is disclosed for preventing the escape of water from the manometer portion of the apparatus into the downstream vacuum source. A second filter is disclosed for permitting two way gas flow at the upstream end of the manometer portion, but for substantially preventing fluid flow in an upstream direction out of the manometer. Fluid fill ports are disclosed on the manometer and water seal portions for permitting infusion of water to precise and repeatable column heights.
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