**3.1 Device composition of Heartstring proximal anastomosis system**

Heartstring proximal anastomotic system consists of proximal anastomotic device, conveying device, loading device and aortic perforator device. The Heartstring anastomotic device enters the aorta through the aortic incision established by the aortic drilling device and provides an anastomotic area for proximal anastomosis. The conveyor is a syringe-like tube with a piston, which is used to place the Heartstring anastomosis device into the aorta. The loading device is used to roll up the Heartstring anastomosis device and load the Heartstring anastomosis device into the conveyor. The aortic perforator device is a disposable device, which consists of a handle, a drilling device, an aortic block, a cover, a needle, a safety lock and an action button, which is used to establish an aortic incision for anastomosis.
