Thrombectomy bracket system

Abstract

The invention discloses a thrombectomy bracket system which comprises a thrombectomy bracket, marking rings, a hoop, a conveying steel cable, a tension tail sleeve, an operation handle, a locking screw and a guide tube, wherein the thrombectomy bracket comprises a bracket front end part, a bracket thrombectomy part and a bracket tail end part in sequence from front to back; the marking rings are respectively arranged on the bracket front end part and the bracket tail end part of the thrombectomy bracket; the front end part of the conveying steel cable is tensioned by using the hoop; the hoop is fixed on the bracket tail end part of the thrombectomy bracket; the rear end part of the conveying steel cable is tensioned by using the tension tail sleeve; a central hole is formed in the operation handle; a locking threaded hole is formed in a lateral side of the operation handle; and the rear end part of the conveying steel cable is inserted into the central hole, is screwed into the locking threaded hole through the locking screw, and then is propped against the rear end part of the conveying steel cable, so that the rear end part of the conveying steel cable can be fixed inside the operation handle. The thrombectomy bracket system has the advantages of being simple in structure, convenient to operate, precise in capturing positioning, clean in thrombectomy, high in blood flow recovery speed and the like.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a thrombectomy bracket system. Background technique [0002] Cerebral infarction (CI) is the general term for ischemic stroke, including cerebral thrombosis, lacunar infarction, and cerebral embolism, accounting for about 70% of all strokes. local lesions. Cerebral infarction is due to the sudden reduction or cessation of the blood flow of the local blood supply arteries of the brain tissue, resulting in ischemia and hypoxia of the brain tissue in the blood supply area of ​​the blood vessel, resulting in necrosis and softening of the brain tissue, accompanied by clinical symptoms and signs of the corresponding parts, such as hemiplegia , aphasia and other symptoms of neurological deficits. 24 to 48 hours after the onset of cerebral infarction, brain CT scans showed low-density lesions in the corresponding parts, with unclear boundaries, which may have a certain mass eff...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of drug thrombolysis are: it is only suitable for small thrombus, and the treatment effect on large-volume thromboembolism is not ideal. Only about 3-5% of patients are suitable for drug thrombolysis; the effectiveness of thrombolysis is less than one-third one

[0005] Mechanical thrombectomy is to deliver the thrombus remover to the lesion site, and then take the thrombus out of the body through the sheath. Mechanical thrombectomy includes the following methods: Thrombectomy, this method removes the thrombus thoroughly, but causes too much damage to the vessel wall , can easily cause various complications; laser thrombectomy, this method is difficult to operate, if the laser energy is too low, it will be ineffective, and if the energy is too high, it will damage the blood vessels, and it will also cause various inflammations. The wall damage is small, but the blood clot is often not caught; although the thrombus removal with the thrombus catcher is simple, it cannot be used in intracranial vessels due to the large size of the thrombus catcher

[0006] The currently disclosed technology performs thrombus removal, and the plaque and broken thrombus on the blood vessel wall are easy to fall off and flow to the distal blood vessel, causing the risk of new embolism

[0007] In order to try to solve the above technical problems, the Chinese patent with publication number CN104068912A discloses an intracranial blood vessel thrombus retriever and a thrombus retrieval device, which is composed of an outer stent and an inner stent, and the inner and outer stents all form a mesh , and the outer stent is covered by the inner stent, and a gap is formed between the two. During the recovery process after the thrombus is captured, the thrombus is firmly fixed through the gap between the inner and outer stents: but this device does not consider intracranial blood vessels In this case, the intracranial blood vessels are very tortuous and the diameter is basically within 4mm. This method of superimposing the stent requires a large inner and outer diameter of the catheter, and when assembled into the catheter, a very hard catheter segment will be formed, making it impossible to reach the embolism through the tortuous intracranial blood vessels. place

Even if it reaches the carotid artery, the blood clot can pass through the gap between the inner and outer stents during the capture process, but because the mesh of the inner stent is too small, the blood clot cannot enter the inner stent, resulting in an unstable state of the blood clot. , when the blood flows into the inner stent, it impacts the blood clot in the interlayer from the inside of the inner stent, causing the blood clot to flow out from the outer stent. Therefore, the substantive technical problem of new embolism caused by the shedding of the thrombus cannot be solved

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