The specifications of the oval foramen unclosed plugging umbrella are oval foramen unclosed plugging umbrella 18 to 30mm in diameter, the angle of the front end of the plugging umbrella delivery system is 45 degrees, and the length of the plugging umbrella is 2,125px.The oval foramen unclosed plugging umbrella consists of a metal mesh and its attached fittings, which is sterilized by ethylene oxide, and is an implantable The plugger delivery system consists of a sheath, a loader, a connecting tube, a transfer bar, etc. It is sterilized by ethylene oxide and is a single-use interventional medical device.