Marker capable of developing degradable stent under X rays and preparation method of marker

Abstract

The invention relates to the field of medical apparatus and instruments, and in particular relates to a marker capable of developing a degradable stent under X rays and a preparation method of the marker. Tantalum having good biocompatibility and developing effect serves as a material for manufacturing the developing marker, through surface treatment, while the developing property under the X rays is not reduced and the biocompatibility is improved, the galvanic corrosion effect caused by corrosion due to contact of different metals (the developing point and the degradable metal stent) is completely avoided. The developing markers of different size specifications are prepared and placed at the reserved holes of the degradable stents of different specifications, after implantation in the stents, along with the gradual reconstruction and self-healing of the vascular function of the implanted part, the side surface as well as the upper and lower surfaces of the developing marker are respectively tightly bounded by netting wires and blood vessels, and drug coatings wrap the surfaces of the developing point and the stents. The developing marker can bear the long-term vascular contraction movement and blood flow scouring and can not fall off, thus having good medical safety and simple practical operability.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a marker capable of developing a degraded bracket under X-rays and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, the change of eating habits, the continuous increase of work and life pressure, the increasingly serious environmental pollution, the number of people suffering from coronary heart disease is increasing day by day. Coronary heart disease is an organic disease of myocardial dysfunction caused by coronary artery stenosis and insufficient blood supply, so it is also called ischemic cardiomyopathy. It is a kind of heart disease with high clinical incidence rate. At present, minimally invasive implantation of vascular stents is widely used for treatment. This technology uses techniques such as puncture, catheter, balloon catheter expansion and intravascular stent placement to expand and recanalize narrowed and ...

AI Technical Summary

Problems solved by technology

The problems caused by the first two methods are: (a) The adhesiveness between the developing film and the stent substrate must be firm, even after the stent undergoes crimping and expansion, the two cannot be separated

However, in addition to the use of expensive precious metals, the corrosion potential difference between the degradable metal bracket and the noble metal development mark is large. Once in contact, the metal bracket equivalent to the anode will quickly corrode and fail.

It can be seen that there are still many technical defects in the imaging technology of interventional stents, and further improvement is still needed.

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