A urethral stent for non-invasive surgery and its preparation method

A technology for urethra and surgery, which is applied in the field of urethral stent and its preparation for non-invasive implantation surgery, which can solve the problems of lack of personalized customization, easy movement of urine, and poor fit, so as to prevent accidental slippage, reduce the difficulty of surgery, The effect of improving comfort

Active Publication Date: 2021-08-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application solves the technical problems of the existing degradable stents such as poor fit, complicated operation, easy movement during urine flushing, and lack of personalized customization, and then provides a controllable degradable stent with good mechanical properties. , a custom-made, comfortable urethral stent for non-invasive implantation surgery, the application also provides a preparation method for the urethral stent

Method used

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  • A urethral stent for non-invasive surgery and its preparation method
  • A urethral stent for non-invasive surgery and its preparation method
  • A urethral stent for non-invasive surgery and its preparation method

Examples

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Embodiment 1

[0034] This embodiment provides a urethral stent for non-invasive surgery, including: a main structure 10 made of polylaurin material, and the main structure 10 is as follows at a normal temperature lower than 30°C. figure 1As shown in the elongated strip with a diameter of 3 mm, the normal temperature state in this embodiment refers to a temperature lower than 30°C, specifically in the range of 15°C to less than 30°C. A degradable alloy wire is coiled on the outer surface of the main structure. In this embodiment, the degradable alloy wire is a cylindrical wire-shaped magnesium alloy wire with a diameter of 0.1 mm. The magnesium alloy wire is on the outer surface of the main structure. The winding density per unit length was 50 turns / cm.

[0035] The surface of the main structure 10 and the degradable alloy wire 6 is coated with lubricating and antibacterial drugs. In order to facilitate implantation into the urethra during the operation, the front end of the main structure ...

Embodiment 2

[0043] This embodiment provides a urethral stent for non-invasive surgery, including: a main structure 10 made of polylaurin material, and the main structure 10 is as follows at a normal temperature lower than 30°C. figure 1 As shown in the elongated strip with a diameter of 5 mm, the normal temperature state in this embodiment refers to a temperature lower than 30°C, specifically between 15°C and less than 30°C. A degradable alloy wire is coiled on the outer surface of the main structure. In this embodiment, the degradable alloy wire is a cylindrical wire-shaped magnesium alloy wire with a diameter of 1 mm. The magnesium alloy wire is in the unit length of the main structure. The winding density is 2 turns / cm. The surface of the main structure 10 and the degradable alloy wire 6 is coated with lubricating and antibacterial drugs. In order to facilitate implantation into the urethra during the operation, the front end of the main structure in this embodiment is a cone structur...

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Abstract

The present invention provides a urethral stent for non-invasive surgery. The urethral stent includes: a main structure made of polyglyceryl dodecanoate (PGD), the main structure is in the shape of a long and thin strip at normal temperature, After being implanted in the human body, it transforms into a helical structure; the degradable alloy wire is coiled on the outer surface of the main structure. The main structure of the stent in the present invention is made of polylaurin, and the main structure is in the shape of a slender strip at room temperature, which is convenient to be placed in the urethra during surgery. The polylaurin has a memory effect at body temperature, After it is implanted into the human body, it can deform and become a helical structure, which can expand the urethra, thereby significantly reducing the difficulty of the operation and improving the comfort of the stent after implantation. In the present invention, the degradable alloy wire is coiled around the main structure, which can deform together with the PGD material while providing support for the stent structure, so as to expand the urethra.

Description

technical field [0001] The invention belongs to the technical field of urethral stents, and in particular relates to a urethral stent for non-invasive implantation operations that is controllable in degradation, has good mechanical properties, can be customized individually, and is comfortable, and a preparation method thereof. Background technique [0002] Prostatic hyperplasia is a common and frequently-occurring disease in middle-aged and elderly men. It can easily cause stenosis of the urethral opening and lead to urinary retention. The existing clinical treatment measures are mainly open skin peeling surgery or cavity surgery, but this kind of surgery is more traumatic and risky, so some patients cannot accept the above-mentioned surgery due to factors such as age or low wound healing ability. Surgery can only be treated with adjuvant drug therapy or intervention with a permanent indwelling catheter. However, there are still big problems in these two methods: drug trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/88A61L31/06A61L31/14
CPCA61F2/885A61F2210/0004A61F2210/0014A61F2240/001A61F2250/0067A61L31/06A61L31/14A61L31/148C08L67/00
Inventor 王丽珍候博成林承延靳凯翔杜鑫樊瑜波
Owner BEIHANG UNIV
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