| 摘要 |
<p>A venting means for closed system drainage devices utilizing a drip chamber and anti-reflux mechanism can be activated, when blocked by the filter system therein coming in contact with the rising fluid within the drip chamber, by using air as the activating means therefor. The drip chamber is constructed so that an air pocket is created above a filter system that is positioned circumferentially around the chamber at a height that is at least the same as or higher than the lowermost portion of the drip tube entering from the top of the chamber. Upon contact of the filter material by the rising fluid, as described above, the surface tension created thereacross can be broken by simply tilting or otherwise slightly moving the chamber and causing the entrapped air to cut through the surface tension and thereby once again open the filter material to permit a venting action to take place.</p> |
