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介入放射术中，通常使用RH型、双螺旋型或双弯型导管行腹腔动脉插管。如欲将导管尖端超选择性插入肝固有动脉乃至肝右动脉，则需在超滑导丝导引下完成。这种超选择性插管方法有操作麻烦、增加血栓形成的机会并增加患者经济负担等弊端。为此，我们对RH导管进行了改良（附图），
Interventional radiology, usually using RH type, double spiral or double curved catheter celiac artery catheterization. If you want to super-selective insertion of the catheter tip of the hepatic artery or right hepatic artery, you need to be completed under the guidance of ultra-smooth guide wire. This ultra-selective intubation method has troublesome operation, increased chances of thrombosis and increased economic burden on the patient. To this end, we modified RH catheter (with photos),