Trocar applied to middle cerebral artery occlusion models

Abstract

The invention provides a trocar applied to middle cerebral artery occlusion models, and belongs to the field of medical apparatus and instruments. The trocar can be recycled and comprises a puncture needle, a core and a suture. The puncture needle comprises a needle, a fixing wing and a fixing connector, the fixing wing is fixed to a side surface of the needle, the tapered top of the fixing connector is connected with the bottom of the needle, and a tapered opening is formed in the bottom of the fixing connector; the core comprises a core body and a fixing interface, and the taper of the tapered top of the fixing interface is identical to the taper of the opening in the bottom of the fixing connector, so that the fixing interface can assuredly cling to the fixing connector; the core is used for fixing the integral trocar, and effects of stopping bleeding and preventing the puncture needle from penetrating blood vessels can be realized; the suture is of a commercially available structure. The trocar has the advantages that the puncture needle is used for being arranged in the blood vessels, the core can be pushed into the puncture needle, the puncture needle can be prevented from piecing the blood vessels, and the suture can be inserted into the core and can penetrate the core to reach target blood vessel locations; the trocar is simple in structure and low in manufacturing cost, and can be conveniently and quickly operated, the puncture needle can be arranged in the blood vessels and can be simultaneously fixed, and accordingly bleeding can be stopped by means of blocking.

Description

technical field [0001] The invention belongs to the field of medical devices and relates to a trocar used in a middle cerebral artery occlusion model. Background technique [0002] Stroke is an acute cerebrovascular disease, which is a group of diseases caused by the sudden rupture of blood vessels in the brain or the inability of blood to flow into the brain due to vascular obstruction, which causes brain tissue damage. It has high morbidity, high mortality and high disability rate. features. It is of great social significance to use animal models to explore the possible pathogenesis of this disease and to find effective therapeutic drugs and methods. The establishment of stable animal pathological models is a key link in the study of this disease, among which the middle cerebral artery occlusion (MCAO) model is widely used. It is considered as a standard animal model of focal cerebral ischemia. [0003] The key technologies of MCAO modeling include the surgical method, i...

AI Technical Summary

Problems solved by technology

The existing method, which directly opens the common carotid artery, has the disadvantages of small operating space, large amount of blood loss, and difficult operation when cutting blood vessels

The size of the surgical opening is not easy to determine. If it is too large, it may cause blood vessel rupture and bleeding, and if it is too small, it will be difficult to insert the suture

The above problems lead to prolonged operation time and large surgical damage, which lead to failure and instability of the model

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