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Application of Nitinol Shape Memory Alloy in Medical Devices

wallpapers Industry 2020-09-16

Due to its unique superelasticity and shape memory effects, as well as excellent biocompatibility and suitable elastic modulus, Nitinol is widely used in heart, cerebrovascular and peripheral vascular devices. Cardiovascular devices include vascular stents and heart valves And occluders. Nitinol is also commonly used in non-vascular stents, orthodontics, repair instruments (orthodontic wires and root canal files, etc.), orthopedic fracture fixation instruments, surgical robots and other minimally invasive instruments.

In recent years, a variety of nickel-titanium alloy medical devices have been launched through special review procedures for innovative medical devices, including interventional biological heart valves, left atrial appendage occluder systems, branched aortic stent grafts and delivery systems, and abdominal aortic grafts Stent system, vascular reconstruction device and cerebral thrombus removal device, etc.

Domestic medical devices on the market include artificial heart valves, ceramic membrane atrial septal defect occluders, hydrophilic coated guide wires, aortic stent graft systems, thoracic aortic stent graft systems, etc. Imported medical devices include porous type Atrial septal defect occluder, self-expanding venous stent, peripheral self-expanding stent system and endovascular stent graft system, etc. Memory alloy is mainly used for vascular stent skeleton, heart valve holder, occluder fixing plate, support net, lock wire, etc.

With the support of advanced technologies such as numerical simulation and in vitro simulation testing, foreign companies have accelerated new vascular stents. For example, Cook Company and Bolton Medical developed the inner chimney branch bracket, Medtronic Company developed the protruding window branch bracket, etc., which have entered the clinical trial stage. Boston Scientific has launched the latest generation of nickel-titanium self-expanding stent INNOVA, which is superior to traditional stents in support, fracture resistance, flexibility and delivery.

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