Anchoring micro-catheter capable of accurately puncturing intracoronary complete occlusion lesion

Abstract

The invention relates to the technical field of clinical medicine cardiovascular medicine interventional therapy surgical instruments, in particular to an anchoring micro-catheter capable of accurately puncturing an intracoronary complete occlusion lesion. The anchoring micro-catheter capable of accurately puncturing the intracoronary complete occlusion lesion comprises an inner tube which is arranged inside an outer tube, wherein the length of the inner tube is greater than that of the outer tube; the inner tube is provided with a positioning and orienting device; the positioning and orienting device is a silk-woven mesh cage arranged at the working end of an inner tube in a sleeving way; the silk-woven is made of a memory alloy. By adopting the anchoring micro-catheter, a chronic complete occlusion lesion can be successfully opened by a forward strategy, the operation difficulty is lowered, the operation success rate is increased, the operation time is shortened, various corresponding expenses are reduced, radioactive ray dosage is lowered for doctors and patients, the intra-operative operation risk is avoided, a standardized operational program is built, and the operation quality can be ensured.

Description

technical field [0001] The invention relates to the technical field of interventional therapy surgical instruments in clinical cardiovascular medicine, in particular to an anchoring microcatheter for accurately puncturing completely occluded lesions in a coronary artery cavity. Background technique [0002] In the existing technology, with the development of modern science and technology, the interventional treatment techniques and instruments for coronary heart disease are becoming more and more powerful. Sclerotic lesions are also gradually conquered by interventional techniques. Only interventional treatment of chronic total occlusions is difficult, time-consuming, large amount of contrast agent is used, the success rate is low, and complications are many and serious. There are still many interventional treatment techniques. The imperfection is called the last bastion that needs to be conquered in the field of coronary interventional therapy. [0003] A large number of l...

AI Technical Summary

Problems solved by technology

[0007] ② How to increase the puncture strength of the guide wire is also the most important reason for the failure of interventional therapy for chronic total occlusion lesions at present, and it is also an important reason why the operator has to let go halfway. So far, there is still no feasible solution;

[0008] ③How to handle in case of puncture error, including how to control the guide wire to return to the true cavity when the tip of the guide wire enters the subintima of the coronary artery during the puncture process, but the media and adventitia have not yet been pierced; the guide wire has been pierced Full-thickness coronary artery wall, but did not cause major coronary perforation and hemorrhage; guide wire passes through the coronary artery wall, and has been pre-dilated with a small balloon, resulting in coronary perforation and hemorrhage, risk of cardiac tamponade, etc. Happening;

[0009] ④How to judge whether the puncture is successful or not? Sometimes the guide wire seems to have successfully punctured the proximal fibrous cap of the chronic total occlusion lesion. It is not clear whether the channel is too narrow and the distal part reaches the true lumen, and the forward blood flow in it has not been restored. The guide wire may run in the true lumen of the coronary artery, but it may also run under the intima. Whether the tip is in the distal It’s not clear when it returns to the true lumen, or it has entered a branch vessel, or it has penetrated the middle layer of the vessel, but it has not penetrated the vessel, what should be done next?

[0010] ⑤The question of when to let go halfway. Any surgeon who performs chronic total occlusion disease cannot persist persistently with the confidence of winning. Sometimes he has to give up halfway. May lose a chance to successfully treat the patient, let go too late, serious complications may be about to occur, and even a life may end at this point, how to choose

But in the actual operation process, the situation ahead of each step is not very clear, and there may be traps at any time, and risks may arise at any time, so we can only be careful, and no matter how careful, how can we achieve complete prevention?

[0012] ⑦ How to communicate with patients and their families. In fact, the interventional treatment of chronic total occlusions requires efficient doctor-patient communication. The doctor-patient communication in successful cases involves that the patient’s blood vessels have been opened and the condition has been relieved, but overall The high medical expenses exceed the psychological expectations of the patients, and sometimes even exceed the psychological expectations of the doctors; there are also perioperative management issues, short-term and long-term complications, follow-up issues, etc.; doctor-patient communication between unsuccessful operations It is even more difficult, because even if the patient is calm on the surface, he will not be balanced in his heart. The higher the cost, the greater the cost-effective contrast, and the hidden danger of doctor-patient disputes will be prominent. If there are intraoperative and postoperative complications, even patients The occurrence of death will definitely cause greater distress to both doctors and patients;

[0013] ⑧ How to control the overall cost. Compared with the interventional treatment of simple lesions, the completion of an interventional treatment of chronic total occlusion, regardless of whether the final result is successful or not, consumes an astonishing amount of high-value disposable consumables, among which the guiding catheter More than one guide wire, ranging from 3 to 5 guide wires, more than 10 guide wires, and 3 to 5 balloon catheters. In this way, there is a huge cost before the stent is implanted. More instruments and technologies are needed for processing, and the consumption of many disposable instruments will inevitably lead to an increase in the overall cost. In addition, as the operation time prolongs, the amount of contrast medium will continue to increase, etc.

However, the reverse strategy needs to consume more materials, more complicated technology, longer operation time, larger amount of contrast medium, more risk of complications, greater radiation dose for doctors and patients, and higher total cost. Forward technology If it can be solved, try not to use reverse technology

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