The angiographic catheter is the key equipment for percutaneous angiography. It should be equipped with suitable hardness, elasticity, flexibility and torsion, as well as good X-ray penetration; in addition, its shape memory should be good, the catheter wall should be smooth, the imaging performance should be high, and thrombosis performance should be controlled in the lowest range.
There are many types of catheters used for the interventional diagnosis and treatment of peripheral vascular diseases. The types of angiographic catheters can be divided into selective angiographic catheters and non-selective angiographic catheters.
1. Selective angiographic catheter
Most of the selective angiographic catheters do not have side holes, and the maximum flow rate can reach 7-8ml/s. The selection of catheters used for treatment of different external vascular sites is basically the same as the aforementioned selective angiographic catheter. In addition, there is a thrombolytic catheter used for treatment, which is designed with multiple sides and the length of the perfusion section can reach 7.cm, which can directly go deep into the thrombus for local perfusion treatment.
The selective angiographic catheters have different shapes according to the requirements of different parts. For example, the catheters commonly used for several arteries in the aortic arch include three types of catheters: Headhunter Ⅰ, Ⅱ, and Ⅲ, and three types of Simmon Ⅰ, Ⅱ, and Ⅲ. Catheters; RDC catheters and SimmonⅠ, Ⅱ, Ⅲ catheters for renal artery and vein; Cobra Ⅰ, Ⅱ, Ⅲ catheters and SHK catheters for iliac artery and vein.
2. Non-selective angiographic catheter
Commonly used non-selective angiography guides are: multi-port pigtail angiography tube and multi-side port straight angiographic catheter. Its maximum flow rate can reach 20-25ml/s.