US Patent 11931541 Connector for selective occlusion of drainage tube

A connector for a fluid drainage system having a body defining a drainage lumen extending longitudinally from a distal portion to a proximal portion. The body can include a piston housing and an inlet in fluid communication with a positive air pressure source. A piston is slidably engaged with the piston housing along a transverse axis between a first position and a second position. In the first position, the piston provides fluid communication between the distal portion and the proximal portion of the drainage lumen and occludes fluid communication between the inlet and the drainage lumen. The piston in the second position occludes fluid communication between the distal portion and the proximal portion of the drainage lumen and provides fluid communication between the inlet and the drainage lumen to clear dependent loops, while preventing distal fluid flow into a catheter.