ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,161, issued on April 21, was assigned to QINGDAO BIOTECH MEDICAL Co. LTD (Qingdao, China).
"Visual pressure regulating catheter" was invented by Yan Wei (Qingdao, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A visual pressure regulating catheter includes: a catheter body, and a hydraulic dilation balloon and a pressure regulating handle both of which are disposed on the catheter body, an endoscope pressure regulating cavity and a dilation liquid perfusion cavity are formed in the catheter body, the dilation liquid perfusion cavity is communicated with the hydraulic dilation balloon, and the pressure regulating handle is provided with a perf...