A thrombus aspiration catheter system

Abstract

The invention relates to a thrombus aspiration catheter system. The thrombus aspiration catheter system comprises an aspirator, a medicine injection device and a four-way tube; the four-way tube consists of a main tube, and an upper branch tube and a lower branch tube which are symmetrically distributed on the main tube; one end of the main tube is connected with a front-section catheter through a front end connecting tube, and the other end of the main tube is connected with a shut-off valve I; the upper branch tube is connected with one end of a back-end catheter I through a shut-off valve II; the other end of the back-end catheter I is connected with the aspirator; the lower branch tube is connected with one end of a back-end catheter II through a shut-off valve III; the other end of the back-end catheter II is connected with the medicine injection device; a center shaft penetrating through the front-section catheter, the front-end connecting tube and the main tube is provided with a metal stirring wire; the near end of the metal stirring wire is provided with a handle I; the far end of the metal stirring wire is provided with a diamond ring. The thrombus aspiration catheter system can implement treatment on thrombus and plaques before aspiration, can also implement aspiration, can also timely inject thrombolytic agents, and is simple in structure and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a thrombus suction catheter system. Background technique [0002] With the aging of society, the accelerated pace of modern life, changes in eating habits, and the influence of social and psychological factors, the mortality rate of cardiovascular and cerebrovascular diseases has surpassed that of malignant tumors, and has become the first killer that seriously endangers the lives and health of our people. Acute myocardial infarction (AMI) is a common cardiovascular and cerebrovascular emergency in clinical practice. The incidence of AMI in my country is increasing year by year and showing a younger trend. question. Data show that the number of cardiovascular diseases in my country has reached 230 million, among which, the number of patients with acute myocardial infarction has exceeded 2 million, with at least 500,000 to 800,000 new cases each year, and the t...

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Problems solved by technology

[0017] When designing the suction catheter, two issues must be considered. One is how to ensure the effectiveness of thrombus suction, because in PCI, once the thrombus fragments flow to the distal end of the coronary artery, the distal vascular Obstruction, "no reflow" or "slow reflow" phenomenon, even if intracoronary thrombolysis or intravenous platelet membrane protein inhibitors are given, the effect is not obvious; the second is how to effectively remove the thrombus by injecting drugs , because some drugs can only inhibit the expansion of thrombus, and the formed thrombus can only be effectively eliminated with high-concentration drugs, and when peripheral intravenous injection is performed, the drug concentration at the thrombus is low, especially at the thrombus formation, due to poor blood flow , the blood concentration is lower, and the optimal antithrombotic effect cannot be achieved at all. If the dosage of the drug is increased, the risk of massive bleeding will increase significantly

[0018] We can see that the suction catheter mentioned in most of the above patents has the following imperfections: first, it has a relatively complicated structure; second, it does not provide a design that can inject thrombolytic agents in time during suction; The third is that most of the materials used to enter the human body are hollow metal wires, which have poor lubrication performance and have effects such as blood coagulation; fourth, these suction catheters need to be operated under the guidance of the guide catheter, and the guide catheter is wedged into the coronary artery. When inside the artery, negative pressure suction can only make the coronary artery collapse, but it cannot suck the thrombus; fifth, it does not take into account that the effect of thrombus suction is easily affected by the anatomical shape of the coronary artery and the characteristics of the thrombus, especially in severe Stenosis, calcification, thrombus at the distal end of tortuous lesion, and thrombus stubbornly attached to the coronary artery wall make it difficult to aspirate the thrombus

In addition, there are also patents that use balloons to block blood vessels. In fact, when the thrombus is located at the distal end of the severely stenotic lesion, the use of balloons can easily cause coronary artery occlusion at the stenosis, resulting in the inability to fully exert the negative pressure suction effect. make thrombus aspiration difficult

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