Medical self-expanding support

Abstract

The invention provides a medical self-expanding support. The medical self-expanding support comprises a body and a transition region. The body comprises multiple sets of first circumferential winding lines connected into a whole. Each first circumferential winding line is provided with multiple first sawtooth waveform objects spirally arranged in the circumferential direction. The adjacent first circumferential winding lines are connected through first connecting bridges. Each first sawtooth waveform object comprises two adjacent equal-length first struts and a first top section for connecting the adjacent first struts. The first connecting bridges are connected between the first top sections. The transition region is arranged at the end of the body and comprises a first transition section and a second transition section which are adjacently connected, and the first transition section and the second transition section are connected with the body through second connecting bridges. The support is of a tubular structure and has the shrinking diameter through which the support is arranged in the blood vessel and the expansion diameter through which the support abuts and expands in the blood vessel. The medical self-expanding support is reasonable in structure, convenient to use, high in flexibility and radial and axial strength and good and durable in use effect.

Description

technical field [0001] The invention relates to the technical field of implantable medical appliances, in particular to a medical self-expanding stent. Background technique [0002] Medical stents can be placed into diseased blood vessel segments to support and unblock the blood vessel walls, and are often used in angioplasty to repair and reconstruct blood vessels. Placement of stents within damaged arterial segments prevents elastic recoil and arterial closure, as well as partial dissection of the artery along the medial layer. Theoretically, stents can be used in any physiological lumen of the human body, such as arteries, veins, bile ducts, urinary tract, digestive tract, tracheobronchial tree, cerebral aqueduct, or genitourinary system, and of course can also be placed in animal lumens. [0003] Generally, there are two types of stents based on how they are deployed within the vessel: self-expanding stents and balloon-expandable stents. The balloon-expandable stent is...

AI Technical Summary

Problems solved by technology

The problem with balloon-expandable stents is that over time, if the stent lacks expansion elasticity, the inner diameter of the stent gradually decreases and eventually collapses due to the natural elastic receding of the vessel

However, this type of transition zone structure is still lacking in functions such as the uniform compression and expansion of the stent, the drug coating of the stent and its contact rate with the blood vessel, and the radial support strength of the stent. status

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