The main body of the atrial septum defect (ASD) occluder is a double disc-shaped structure, and the middle of the double disc is connected by the waist. The atrial septal occluder utilizes the waist to provide support and blockage in the fistula tract, and the bilateral discs play a role of isolating and fixing the occluder around the fistula to a certain extent, and achieve effective blockage through the cooperation of the waist and the disc.
(1) There are many specifications for the atrial septal occluder, the size of the double disc is 16～56 mm, and the size of the waist is 8～40 mm, all have corresponding specifications of the occluders;
(2) It is made of nickel-titanium alloy wire, which has good shape memory, biocompatibility, fatigue resistance, and super elastic properties, and can seal various irregular fistulas;
(3) Both the waist and the disc have built-in PET baffle film, which has a good insulation effect on liquid and gas.
The commonly sheaths designed for atrial septal occluder occlusion are SteerEase delivery sheaths, Fustar adjustable curved sheaths, etc., with the length of 550-900 mm. The delivery sheath has good biocompatibility and smoothness, as well as good flexural resistance. In particular, the adjustable curved sheath has an adjustable bend design of the distal sheath, and the bend design is 0-180°, which is convenient for adjustment during operation and easy to block.