Extension catheter for coronary artery stent implantation operation

Abstract

The invention relates to an extension catheter for coronary stent implantation operation. The extension catheter comprises a catheter and a guide wire, wherein the catheter is connected with the guide wire, the catheter comprises a catheter head end, a catheter body and a catheter tail end, one end of the catheter body is connected with the catheter head end, the other end of the catheter body is connected with the catheter tail end, and the surface of the catheter body is provided with micropore structures. When the extension catheter enters a narrow section of a blood vessel to cause blood vessel blockage, the micropore structures can enable blood to circulate, and pain and uncomfortable symptoms of a patient are relieved; the micropore structures are elliptical, so that the scratch to the blood vessel can be reduced, and the injury to patients can be reduced; the position, 3-5 centimeters away from the guide wire, of the catheter is not provided with the micropore structures, and smooth conveying of the extension catheter can be guaranteed; a head hose is arranged, the smooth head can enable the operation process to be safer, the probability of scratching the blood vessel is reduced, and the occurrence of vascular complications is reduced; and the condition of the catheter can be clearly observed through X-ray fluoroscopy in the radiography process through a marking belt, and therefore, the operation can be conveniently performed.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an extension catheter for coronary artery stent implantation. Background technique [0002] Coronary artery stent implantation is a mechanical interventional treatment. Stent implantation is the most effective means to deal with acute vascular occlusion of PTCA. It is to permanently place metal stents in coronary artery lesions. The balloon releases or self-expands to support the vessel wall to keep the coronary artery lumen open and reduce the mortality rate of acute myocardial infarction. [0003] After the coronary artery stent implantation operation is completed in the patient’s right arm, the guiding catheter is inserted to establish a channel. When the guiding catheter reaches the opening of the coronary artery of the heart, the channel is established. After the balloon dilates the stenotic lesion, the balloon is withdrawn, and the stent is sent along the guide...

AI Technical Summary

Problems solved by technology

Clinically, there are often tortuous and calcified diseased blood vessels, which lead to greater resistance when the metal stent passes through the lesion along the guide wire, and the stent will fall off the stent balloon due to too much friction during the forced push process.

[0004] At present, the existing clinical solution is to have an extension catheter, which can enter the stenotic segment of the blood vessel and the position where the blood vessel is bent, which can solve the problem of stent delivery on the channel; but at the same time it brings a problem, the extension catheter is deep in tortuous, calcified and other lesions When the diseased vessel is damaged, it often causes the distal end of the diseased vessel to lose blood supply. During the delivery of the extended catheter and the stent, the extended catheter temporarily stops the blood flow of the diseased vessel; when the patient has a single vessel disease and the heart function is good, It can induce chest pain, which is generally tolerated, but if the patient has multivessel disease or poor cardiac function, he may not be able to tolerate transient ischemia, and there is a risk of cardiac arrest

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