Degradable expandable local urine tract intracavity support system

An inner stent and urethral lumen technology, applied in the field of medical devices, can solve the problems such as the inability to place a double J tube and a urinary catheter to fully meet the expansion requirements, difficulty in placement, and damage to the urethral lumen, so as to prevent recurrence of stenosis and obstruction, The effect of reducing stenosis and reducing the incidence

Inactive Publication Date: 2017-03-08
曹庆杰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, both the ureter and urethra have physiological stenosis, which makes it impossible to place a double-J tube or urinary catheter that can fully meet the expansion requirements; , causing damage to the normal urethral lumen; it will also bring great pain to the patient

Method used

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  • Degradable expandable local urine tract intracavity support system
  • Degradable expandable local urine tract intracavity support system

Examples

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Embodiment Construction

[0029] The present invention is described in detail in conjunction with accompanying drawing now.

[0030] The present invention designs a class of degradable expandable urinary tract stents, which are made of degradable metal materials and / or degradable polymer materials, so that they can be degraded in the urinary tract system (the scar in the target lesion urinary tract is stable After that, before the formation of attached stones), it is excreted with urine and plays a role of temporary support and expansion. The stent can be coated with a variety of pharmaceutical ingredients to play corresponding roles, including but not limited to one or a combination of proliferation inhibitors, wound healing materials, stone formation inhibitors, antibiotics, contrast agents, etc., to inhibit scar formation. Tissue hyperplasia, promote wound healing, inhibit the formation of attached stones, prevent infection, and make the stent visible under X-ray. In order to prevent wound fibrous ...

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Abstract

The invention provides a degradable expandable local urine tract intracavity support system to effectively support a local lesion urine tract after urine tract stricture obstruction surgery and to prevent stricture obstruction replase due to postoperation scar hyperplasia and contracture. The support system is made of degradable material and can be degraded after scar stability and before adhesive lithogenesis formation and can be discharged with urine outside the body; and the support system comprises but is not confined to a naked rack, a drug eluting stent or a drug coating layer rack, a film covering rack, etc. The support is compressed into an exotheca with small caliber and then released after reaching a target urine tract position, then expanded and enlarged to support the lesion urine tract; the internal diameter and length of the support can be adjusted according to clinic demands; and compared with traditional double J type ureter racks and catheters, interference and damage to normal urine tract except for the stricture part can be avoided, and limitation of rack lumen inner diameter by the urine tract physiological stricture part can be avoided.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a degradable and expandable local stent system for treating urinary tract strictures (including but not limited to ureteropelvic junction strictures, ureteral strictures, urethral strictures, etc.) in a cavity. Background technique [0002] Cadaveric studies show that the incidence of hydronephrosis is 3.1%, and 2%-2.5% of children suffer from hydronephrosis; urinary tract obstruction is an important cause of hydronephrosis, and ureteropelvic junction stricture, ureteral stricture and urethral stricture It is the most common type of urinary tract obstruction clinically. The classic treatment for urinary tract obstruction is open or laparoscopic surgery to resect the stenotic segment of the urinary tract, and then end-to-end anastomosis to reconstruct the integrity of the urinary tract; The advantages of fast recovery and low cost are accepted by more and more doctors. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/82A61F2/04A61M29/04
CPCA61F2/82A61F2/0077A61F2/04A61F2002/047A61F2210/00A61F2210/0061A61F2250/0067A61M29/02
Inventor 曹庆杰程勇
Owner 曹庆杰
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