A kind of medical bracket and its manufacturing method

Abstract

The invention relates to a medical stent and a manufacturing method thereof. A stent body with a main body part and a thin film for covering the peripheral surface of the main body part are set and prepared; the periphery of the stent body is provided with a hollow cavity and a plurality of holes are formed in the hollow cavity through a plurality of crossed lines or laser patterns; one layer of the thin film covers the outer surface of the main body part and blocks the plurality of holes of the stent body; the bracket body is inserted into a hollow part of the thin film so that the thin film covers the periphery of the stent body; overlapped parts of the two ends of the main body part and the thin film are impregnated so that a coating layer is formed. The medical stent has the beneficial effects that a phenomenon that tissues of a narrow part protrude towards the inner part of the stent through the holes in the surface of the stent is prevented; a foreign body sensation of people subjected to surgeries can be remarkably reduced when the stent is arranged; the friction force can be adjusted and a bent state is kept; the thin film can be fixed under a state that a sewing wire is not used; stent manufacturing steps and time can be reduced by parts and the manufacturing cost of the stent can also be reduced; the thin film can be more stably fixed on the stent body.

Description

technical field [0001] The invention relates to medical bracket technology, in particular to a medical bracket and a manufacturing method thereof. Background technique [0002] With the rapid development of material science and precision micromachining technology, there are more and more types of medical stent materials. The more common ones are stainless steel 316L, nickel-titanium alloy, cobalt-based alloy, pure iron, magnesium alloy and other metal materials, as well as polymers, etc. non-metallic materials. [0003] Generally speaking, blood vessels, esophagus, etc. in the human body need to ensure a certain inner diameter. Due to various reasons such as sediment, such organs are narrowed. At this time, it is necessary to insert a stent to artificially expand the narrowed part. In addition, It is also necessary to insert a stent for the purpose of surgery, etc. Because the medical stent expands the vascular wall in the blood vessel to prevent vasoconstriction or even c...

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Problems solved by technology

[0008] However, in the above-mentioned process, if the dipping process is used, the silica gel is coated on the entire area of ​​the stent, so when used in curved parts such as the digestive system, there is a strong restoring force to restore the initial state; that is, the softness of the stent Sexual decline, friction on the lesion, will lead to inflammation

[0009] In terms of the method of using the film, in the approval of medical device products, not only the stent, but also the suture thread must undergo biological tests before approval. In addition, an additional step of bonding and fixing the film to the stent with the suture thread is required. Therefore, the manufacturing cost and manufacturing time of the stent are increased

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