| 摘要 |
An I.V. bag is connected to a drip chamber, then to a conventional tube clamp and a regulating tube containing a wick or other material that breaks surface tension of the liquid in the tube, which flows into a bubble separator that forces any remaining entrained air through one or more hydrophobic gas permeable membranes, and then into the patient. A check valve near the patient prevents back flow. A vent placed adjacent to the tube clamp isolates any pressure drop above the vent, allowing a pressure head to develop in the regulating tube, which insures a constant flow of I.V. liquid into the patient regardless of downstream or upstream hydraulic conditions.
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