Quick exchange type large-cavity thrombus aspiration catheter and use method thereof

Abstract

The invention discloses a quick exchange type large-cavity thrombus aspiration catheter, which comprises a guide catheter, wherein the tail end of the guide catheter is externally provided with a sealing balloon, and the sealing balloon communicates to a Luer taper needle bed arranged on the tail end of a handle through the central cavity of a pushing rod. When the quick exchange type large-cavitythrombus aspiration catheter is used, the quick exchange type large-cavity thrombus aspiration catheter enters the far end of the guide catheter through a guiding wire, the needle bed of the aspiration catheter is connected with a pressure pump, through pressurization or pressure relief by the pressure pump, the balloon is full or retracted, so that a cavity gap between the aspiration catheter and the guide catheter is sealed or is not sealed, and the aspiration catheter and the guide catheter are connected into a whole or are independently separated. When the quick exchange type large-cavitythrombus aspiration catheter is used for carrying out PPCI (percutaneous coronary intervention) on a high thrombus load STEMI (ST-elevation myocardial infarction) patient, thrombus suction can be effectively carried out while supporting is reinforced, and in addition, D to B time is not affected. When the balloon is expanded and a stent is implanted, thrombus suction is continuously carried out,and thrombi and broken tissues can be effectively prevented from being washed to the far end of a vessel by blood flow so as to prevent and treat slow flow and no reflow.

Description

technical field [0001] The invention belongs to the technical field of thrombus aspiration catheters in interventional diagnosis and treatment of cardiovascular diseases, and in particular relates to a rapid-exchange large-cavity thrombus aspiration catheter and a method for using the same. Background technique [0002] Acute ST-segment elevation myocardial infarction (STEMI) (mainly refers to type 1 myocardial infarction) is caused by acute rupture or erosion of coronary atherosclerotic plaque, activation of platelets, secondary coronary thrombosis, causing myocardial ischemia and injury or necrosis. At present, it is believed that primary percutaneous coronary intervention (PPCI) is the most effective method to open the culprit vessel and restore myocardial perfusion in STEMI patients. However, "no-reflow" phenomenon occurs in about 1 / 3 of patients after PPCI, and its main mechanism is that thrombosis and tissue fragments block distal coronary microvessels, resulting in p...

AI Technical Summary

Problems solved by technology

[0006] The main defects of this technology are: 1. Thrombus aspiration is performed before emergency coronary artery balloon dilation. Due to design defects, balloon dilation and thrombus aspiration cannot be performed simultaneously, and a balloon dilation catheter and a thrombus aspiration catheter are required. Switching back and forth increases the operation steps, delays the time of balloon expansion, delays the opening of blood vessels and the time for myocardial reperfusion

2. Most of the current thrombus suction catheters are designed with double lumens at the head end. The outer diameter is large and the inner diameter of the effective suction chamber is small. Larger and stronger thrombus and tissue fragments are not easy to be sucked out, and the suction catheter is easy to be blocked, resulting in aspiration. suction failure

It is a waste of time and the effect is not obvious. This is a common problem of manual thrombus aspiration catheters on the market, and it is also a taboo for PPCI.

3. When the current manual thrombus aspiration catheter is withdrawn from the target coronary artery, the thrombus and tissue fragments adsorbed at the tip of the catheter are easy to fall off, causing embolism of other coronary arteries and peripheral arteries, resulting in extension of myocardial infarction and / or damage to other tissues and organs. iatrogenic ischemic injury

This method has a limited scope of application. In addition, it is easy to damage the coronary artery, and it is easy to cause thrombus to fall off and block the coronary artery branch near the lesion, resulting in iatrogenic damage and expansion of the range of myocardial infarction.

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