Intravascular thrombus withdrawing device

Abstract

The invention provides an intravascular thrombus withdrawing device. The intravascular thrombus withdrawing device comprises a thrombus withdrawing system and a delivery system. The intravascular thrombus withdrawing device is characterized in that the thrombus withdrawing system comprises a thrombus pushback component and a thrombus storage and sealing component, the delivery system comprises a push component and a control component, the push component far end is connected to the thrombus sealing component, the control component far end is connected to the thrombus pushback component, the thrombus pushback component can be released at the far end of a target thrombus, and the thrombus storage and sealing component can be released at the near end of the target thrombus. By keeping the push component constant, the control component is pushed back toward the near end direction so as to make the thrombus pushback component push the target thrombus enter the thrombus storage and sealing component; moreover, the thrombus storage and sealing component can also partially or wholly enter the thrombus storage and sealing component of the near end, and finally the thrombus system wrapped with the target thrombus is withdrawn out of the body. The intravascular thrombus withdrawing device has the advantages that the thrombus catching rate is high, the thrombus does not easily fall off in the withdrawing process, the delivery system is good in flexibility, and harm to the blood vessel is small in the thrombus withdrawing process.

Description

[0001] Technical field: [0002] The invention relates to a medical device for interventional treatment in the field of medical devices, in particular to a device for taking out thrombus in a blood vessel. [0003] Background technique: [0004] Acute cerebral thrombosis, mainly caused by cerebrovascular thrombosis, is the most common fatal and disabling disease of the central nervous system. Cerebral thrombosis has the characteristics of high morbidity, disability, mortality and recurrence. According to a statistical data in Beijing, the incidence of acute cerebral hemorrhage in Beijing has shown a significant downward trend in recent years, while the incidence of acute cerebral thrombosis has increased significantly, that is, the proportion of acute cerebral hemorrhage to stroke has increased from 42 % decreased to 16%, while the proportion of acute cerebral thrombosis increased from 55.8% to 81.6%, which shows that cerebral thrombosis has become the number one disease of th...

AI Technical Summary

Problems solved by technology

[0015] The above-mentioned suction thrombus removal system works better when taking out small embolisms, but when taking out large thrombi, in order to prevent clogging of the suction tube, it is necessary to repeatedly crush the thrombus before suctioning, the process is cumbersome and it is easy to damage the blood vessel

[0016] From the above discussion, it can be seen that the thrombectomy devices in the above-mentioned patent documents, as well as the existing thrombus removal techniques, all have one or more defects.

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