Abstract: Enabled or activated closure and sealing devices in the form of closure balloons, and related methods, are disclosed, which substantially preclude entry and clotting of blood at the distal end of a lumen of an indwelling catheter tube during times when flow therein is not occurring. The closure and sealing balloon is disabled or deactivated to accommodate flow, without clotting, through the lumen of the catheter tube when flow therein is resumed.
Abstract: Enabled or activated closure and sealing devices in the form of closure balloons, and related methods, are disclosed, which substantially preclude entry and clotting of blood at the distal end of a lumen of an indwelling catheter tube during times when flow therein is not occurring. The closure and sealing balloon is disabled or deactivated to accommodate flow, without clotting, through the lumen of the catheter tube when flow therein is resumed.
Abstract: An adjustable medical outdwelling, normally closed, pressure-responsive slit valve flow control for fluid (liquids and gases) and related methods wherein a diaphragm having a slit therein may be flexed both distally and proximally by respective pressure differentials across the diaphragm. One or more adjustment members are provided on one or both sides of the diaphragm to selectively adjust the amount of pressure differential required to open the slit valve.
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