Medical spring ring and conveying system comprising same

Abstract

The invention relates to a medical spring ring which comprises at least two sections of first spring units, and the adjacent first spring units are flexibly connected. According to the medical spring ring, an integrated structure of the spring ring is changed into flexible connection of the multiple sections of first spring units, and the sections of first spring units are not directly connected, so that the sections of first spring units are not directly connected, and force transmission does not exist; interference between the two connected first spring units in the spring ring filling process can be avoided, and the intra-tumor overturning phenomenon generated by an integrated spring ring in an operation is avoided. Furthermore, the conditions of superposition and tail end tightening caused by traditional integrated structure filling cannot be caused by filling of all the independent first spring units, so that the tube kicking phenomenon is reduced, the product operation safety is improved, the risks of aneurysm rupture and operation time prolonging are avoided, the life safety of a patient is guaranteed, and the safety of the patient is improved. Good use feedback of doctors is obtained, and the product complaint rate is low.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a medical coil with multi-segment flexible connection and a delivery system comprising the coil. Background technique [0002] Intracranial aneurysm is a tumor-like protrusion formed by expansion or expansion of the arterial vessel wall due to cerebrovascular wall lesions or injuries. Once the aneurysm ruptures, it can easily cause intracranial subarachnoid hemorrhage, which has a high mortality rate and disability. Rate. The basic structure of the coils on the market is a medical device with a ball spring structure formed by alloy wires. The delivery device is used to sequentially deliver the coils to the position of the diseased aneurysm through a microcatheter, fill it into the aneurysm, change the blood flow in the tumor, and form an embolism. The therapeutic effect is achieved by closing the aneurysm to prevent further development of the aneurysm leading to rupture ...

AI Technical Summary

Problems solved by technology

The main defect is that the one-piece coil product has poor connection flexibility between the units. During the filling process, the subsequent filled units continuously exert force in different directions on the filled unit, causing the position of the coil to change and flip in the aneurysm. Happening

Flipping will cause relative sliding between the product and the aneurysm, and friction will easily increase the risk of aneurysm rupture

[0005] The second defect is that the one-piece design results in a longer spring coil length, and the front-end units are continuously stacked, resulting in the final filling unit being tightened, resulting in an increase in the hardness of the rear-end spring coil, which is very prone to the risk of tube kicking

The kicking tube is the reaction force of the microcatheter during the filling process of the coil. The increase in product hardness will lead to an increase in the reaction force of the microcatheter, forcing the microcatheter to swing and move backward, and the aneurysm will fall. Reoperation needs to adjust the microcatheter , increasing the operating time will increase the patient's surgical risk

Therefore, the design of the one-piece spring coil has defects such as long length, poor flexibility at the unit connection position, easy flipping inside the tumor, and kicking the tube.

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