Shape memory urethral stent

Abstract

The invention provides a shape memory urethral stent, and relates to the technical field of auxiliary medical instruments, the shape memory urethral stent comprises a urethral catheter and a supporting member, the supporting member is arranged on the inner wall of the top of the urethral catheter, and the supporting member has an initial shape and a temporary shape and is used for being converted between the initial shape and the temporary shape under the driving of external stimulation; the supporting piece comprises a fixed part and a movable part, the fixed part is fixedly connected with the inner wall of the catheter, the movable part is connected with the fixed part and can rotate around the fixed part, in the initial shape, the movable part is bent outwards to protrude out of the catheter and is used for being placed on bladder tissue, and in the temporary shape, the movable part is bent outwards to protrude out of the catheter. And the movable part is bent inwards to be arranged towards the inner cavity of the catheter. Implantation and fixation of the urethral stent are controlled through the deformation process of the supporting piece with the bidirectional shape memory performance, after implantation, the movable part spontaneously deforms and is bent outwards to be attached to the bladder tissue, fixation is achieved, and the stability of the urethral stent can be improved.

Description

technical field [0001] The invention relates to the technical field of auxiliary medical devices, in particular to a shape-memory urethral stent. Background technique [0002] Urethral defect is a common urinary system disease, usually due to urethral tissue defect caused by epispadias, hypospadias, urethral injury, etc., or urethral stricture caused by inflammation, trauma, congenital factors and iatrogenic factors or Caused by the loss of urethral tissue caused by other diseases during the treatment process, it will cause the patient to urinate disorder, and in severe cases, it will cause abnormal kidney function. The current existing technologies for treating urethral defects usually use surgical operations to reconstruct the defective urethra, thereby restoring the patient's voiding function. There are many surgical methods for urethral reconstruction, and autologous materials are usually used to reconstruct the defect urethra, but it is difficult to achieve the expecte...

AI Technical Summary

Problems solved by technology

[0003] At present, some urethral stents have been developed for the treatment of urethral defects, but these catheters will move up or down over time. Some studies have proposed the use of two-end expandable memory alloy catheters to solve the problem of urinary catheterization. However, the design of the expanded mode cannot avoid the tendency of the urethral stent to move when the sphincter is in a relaxed state, and the expanded mode below it may affect the sphincter of the human body, and the existing urethral stent has a single function and cannot be applied to different scenes

Images