Spiral urethral stent and production method thereof

A production method and spiral technology, applied in the field of medical devices, can solve the problems of low elasticity of scaffold materials, blockage, and inability to fundamentally solve the problem of urethra, and achieve good tissue compatibility, good dispersion, fragmentation and connection, and foreign matter small effect
CN102488931AInactive Publication Date: 2012-06-13张自强
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
张自强
Publication Date
2012-06-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention aims to provide a spiral urethral stent and a production method thereof. The spiral urethral stent is made of polymer composites. The polymer composites are formed by compositing nondegradable high polymer materials and biodegradable high polymer materials. The nondegradable high polymer materials and the biodegradable high polymer materials are mixed uniformly according to a certain proportion, and are extruded to be high polymer material filaments through an extruding machine at a certain melting temperature. The production method of the spiral urethral stent comprises the following steps: winding the high polymer material filaments on a mold to be a spiral shape; and shaping for 0.5h to 48h at the temperature of 40 DEG C to 90 DEG C so as to form the spiral urethral stent. The stent can be partially degraded within a controlled range, and after urethral repair is finished, the partial degraded stent can be taken out from the urethral.
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Description

technical field

[0001] The invention belongs to the field of medical instruments and relates to a spiral urethral support, which is used for treating male urethral stricture. Background technique

[0002] The treatment of male urethral stricture is still a problem in urology, and various permanent or temporary stents have been developed to treat urethral stricture. In 1980, Fabian first reported the use of urethral stents to relieve the pain of patients with urethral blockage caused by prostatic hypertrophy (BPH) (Urologe A, 1980,19: 236). In 1989, Milroy et al. reported the successful treatment of recurrent urethral stricture with a permanent metal stent (Journal of urology, 1989, 141: 1120-1122). At present, nickel-titanium memory alloy stents are commonly used clinically. The stents are generally epithelialized and grow into the urethral tissue after 4 to 6 months of implantation. The bracket was removed after long-term use, and more damage was caused by it. From the c...

Claims

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