Guiding catheter and catheter assembly for angiography and angiography method

Abstract

The invention relates to a guiding catheter and a catheter assembly for angiography and an angiography method. The catheter assembly comprises the guiding catheter and an angiography catheter. The guiding catheter comprises a tube-shaped body with a guiding end arranged at the front end, and a lateral opening communicated with an inner hole of the tube-shaped body is formed in part, on the rear side of the guiding end, of the tube-shaped body. The catheter assembly further comprises a guiding wire used for driving the angiography catheter to stretch into the inner hole of the tube-shaped body and enabling the front end of the angiography catheter to penetrate out of the lateral opening. When the catheter assembly is used, the guiding catheter can stretch into the arch of the arcus aortae firstly, the lateral opening is made to correspond to a corresponding branch blood vessel, the angiography catheter is coaxially led into the guiding catheter under the cooperation of the guiding wire, then the guiding wire is rotated to enable the front end of the angiography catheter to penetrate out of the lateral opening in the guiding catheter and enter the corresponding blood vessel, then angiography operation is carried out, the guiding catheter can play the strong supporting role for the angiography catheter, and the stability of the angiography process is ensured.

Description

technical field [0001] The present invention relates to a guiding catheter for angiography in medical equipment, a catheter assembly using the guiding catheter and an angiographic method. Background technique [0002] Although total cerebral angiography through femoral artery catheterization has become a routine method for cerebral angiography, postoperative posture and activity need to be restricted, and large hematoma, pseudoaneurysm, and arteriovenous fistula may occur during puncture And other complications, similarly, in the case of severe distortion and stenosis or occlusion of the abdominal aorta and iliac artery, the angiography failed. Since the first report of coronary angiography via radial artery approach in 1989, it has been found that the radial artery approach can be used for a variety of angiography and interventional treatments, mainly because this method has fewer vascular complications and can improve postoperative comfort for patients. And to avoid posto...

AI Technical Summary

Problems solved by technology

The problem with the existing angiography catheter is that the entire angiography catheter needs to be rotated in the blood vessel so that the end of the front catheter segment can enter the corresponding branch blood vessel. It is relatively easy to select the ipsilateral vessel, but it is difficult to select the contralateral vessel; The stability and support of simple angiography catheters are poor; the reverse hooking technique is difficult, cumbersome and time-consuming, and requires high technical requirements for the surgeon. Therefore, to a certain extent, the relevant operational risks and surgical radiation exposure time are increased.

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