Stent suitable for urethral bent part

A bending and urethral technology, applied in stents, additive processing, etc., can solve problems such as stent fixation failure, decrease in inner diameter, stent displacement, etc., to achieve a good bending effect and reduce the effect of urethral straightening
CN112107401AActive Publication Date: 2020-12-22BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2020-12-22

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Abstract

The invention provides a stent suitable for a urethral bent part. A body of the urethral stent is of a tubular structure made of a degradable or non-degradable material; the tubular structure is in astraight tube state before being implanted; at least one part of the tubular structure is bent after being implanted into a human body; the tube wall of the tubular structure is formed by arranging and combining concave hexagonal structures; and, in the concave hexagon at the bent position after being implanted into the human body, the included angle theta formed by the straight edges and the inclined edges of the concave hexagons sequentially arranged from the bent outer side to the bent inner side is gradually increased. After the urethral stent in the invention is implanted into a urethralstenosis part, both the inner diameter and the length of the stent can be increased by means of balloon dilatation and the like; furthermore, the stent can be bent at the same time after being implanted so as to adapt to physiological bending of a urethral membrane part, a ball part and a pubis anterior bending part; and thus, the problems of intimal hyperplasia, stent restenosis and the like caused by urethral straightening due to overlarge rigidity of the stent are solved.
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Description

technical field

[0001] The application of the present invention relates to the field of medical devices, in particular to a bracket suitable for the curved part of the urethra Background technique

[0002] Urethral stricture is one of the common diseases of the urinary system. The main symptoms of urethral stricture are dysuria and prolonged urination. In addition, because the urine cannot be discharged in the narrow place and the retention will cause inflammation, so patients with urethral stricture are often accompanied by chronic urethritis, which may lead to a series of more serious diseases such as urinary tract infection, and even more serious diseases. Kidney failure and uremia caused by bacterial infection. Urethral stricture is a common disease of the urinary system, with an incidence rate of 2‰ to 12‰. It is estimated that more than 6 million patients in my country need treatment for urethral stricture every year.

[0003] For urethral stricture, the current clin...

Claims

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