| http://www.w3.org/ns/prov#value | - When the internal pressure is higher than the pressure in the abdominal cavity, the sterile saline or water inside the semi-permeable balloon readily weeps through the semi-permeable membrane to create a fluid interface-layer that maintains continuous effective coupling. [0067] Alternatively, as shown in FIG. 11, a vacuum cap 138 made of soft rubber, plastic, or other elastomeric material, may als
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