2results about How to "Prevent stenosis" patented technology

This invention discloses a dynamic pressure-adaptive arterial puncture closure system and method, relating to the field of medical device technology. The system includes: a pressure sensing module for acquiring pressure distribution information at different circumferential locations within the blood vessel and sensing pulsating pressure signals in real time; an intelligent control module electrically connected to the pressure sensing module for receiving and processing the pulsating pressure signals and generating dynamic closure control commands according to a preset adaptive algorithm; and a mechanical execution module electrically connected to the intelligent control module for receiving the dynamic closure control commands and driving the closure element to apply a dynamically adjustable radial closure force to the arterial puncture site. This invention can adapt to the dynamic changes in the patient's blood pressure in real time and automatically. Through a dynamic pressure adaptive mechanism, it achieves a fundamental shift from "static compression" to "dynamic adaptive compression," minimizing vascular wall damage while ensuring hemostasis and significantly reducing the risk of complications.

This invention relates to a biliary stent material, its preparation method, and its application, belonging to the field of biliary stent technology. A method for preparing a biliary stent material includes the following steps: dissolving 4-(ethylene glycol ketal)-ε-caprolactone and caprolactone copolymer in an organic solvent, then adding barium sulfate to obtain a mixed solution; after the organic solvent in the mixed solution evaporates, a composite casting membrane is obtained; the composite casting membrane is coated onto the surface of a mold, heated, cooled, and the mold is removed to obtain a tubular stent; the tubular stent is immersed in a dopamine hydrochloride buffer solution and stirred to obtain a tubular stent loaded with a polydopamine coating; curcumin is added to an amnion decellularized hydrogel solution to obtain a composite hydrogel solution; the tubular stent loaded with the polydopamine coating is then immersed in the composite hydrogel solution and allowed to gel statically to obtain the biliary stent material. The biliary stent material of this invention has the characteristics of being biodegradable, having good flexibility, and excellent biocompatibility.