A kind of urethral stent and implantation system

Abstract

The invention discloses a urethral support and an implantation system, which are mainly used to support the prostatic urethral obstruction and realize autonomous urination. It consists of prostatic urethral stent, connecting wire, soft anchor, taking out wire, adjustable limit device, support rod and handle. The prostatic urethral stent is made of medical silica gel, and its head end is designed as a petal-shaped spherical structure. The tail end is connected with a soft triangular anchor through a connecting wire. The middle hole of the soft anchor is penetrated, and the soft anchor is fixed on the connecting line with silica gel, without winding the stay wire around the outer tube wall of the bracket, and the stay wire is fixed on the stay wire and fixed with silica gel, which plays the role of fixing the bracket. The support rod is inserted into the support tube, and the outer wall of the support rod is marked with a scale; the adjustable limit device is arranged on the outer wall of the support rod; compared with similar metal and non-metallic stents, the silicone prostate urethral stent of the present invention has The structure is simpler, and the operation is more convenient and safe. The petal-shaped spherical structure at the head end of the stent tube can expand naturally at the bladder neck to prevent the stent from shifting. The multi-lobed structure can significantly increase the passage of urine and reduce the contact surface with the trigone of the bladder, thereby reducing discomfort in the patient's body.

Description

technical field [0001] The invention relates to a urethral stent and an implantation system, belonging to the technical field of medical devices. Background technique [0002] Bladder outlet obstruction and urinary retention caused by benign and malignant lesions of the prostate are common clinical diseases and frequently-occurring diseases. In clinical practice, urinary catheterization and drainage are often used to relieve the obstruction, which brings great inconvenience and pain to the life of the patients, and at the same time easily causes their own infection and nosocomial cross-infection. In the existing technical field of metal and non-metallic prostate stents, by effectively supporting the urethra of the prostate, the obstruction of the bladder outlet can be solved, autonomous urination can be realized, and the quality of life of patients can be greatly improved and infection caused by catheterization can be prevented. However, through clinical practice, it is fou...

AI Technical Summary

Problems solved by technology

In the existing technical field of metal and non-metallic prostate stents, by effectively supporting the urethra of the prostate, the obstruction of the bladder outlet can be solved, autonomous urination can be realized, and the quality of life of patients can be greatly improved and infection caused by catheterization can be prevented. However, through clinical practice, it is found that there are disadvantages such as poor urination caused by stent displacement, urethral irritation symptoms, poor comfort, and cumbersome operations by doctors.

[0003] Accurate placement of the stent is particularly important in clinical applications. In the current technical field, the fixation device in the bladder is usually fixed with a fluid injection balloon. The internal movement of the bladder will cause the stent to shift, affect the effective support of the stent, and cause poor urination; 2. The balloon may rupture due to long-term placement of the balloon, and the liquid leakage in the balloon may cause the stent to slip out and other influencing factors; 3. Because there is a certain distance between the urination hole of the balloon and the neck of the bladder, it affects the emptying of bladder urine: 4. The liquid injection balloon increases the contact surface with the bladder triangle, which can stimulate the bladder to a certain extent and reduce its pressure. Comfort; 5. Using the balloon structure requires the use of a two-way valve device (filling device) to increase the complexity of the structure and operation

[0004] In the description of patent application number 2017205697891, the catheter set of the urethral stent system includes a first silicone catheter, a second silicone catheter and a guide tube, the tail end of the first silicone catheter is connected to the head end of the second silicone catheter, and the second silicone catheter The tail end of the stent is connected with the guide tube through the connector; both the first silicone catheter and the second silicone catheter have built-in support springs, the structure is complex, the diameter of the tube is relatively thick, and it is difficult to insert, which may easily cause urethral mucosal damage; and after the stent is positioned and released , the stent may be displaced when the balloon is taken out; in addition, the connecting wire is wrapped around the wall of the stent tube, which will reduce the inner diameter of the stent tube and affect the patency of urination; the designed triangular soft anchor is large, and the connecting wire There is a rough surface formed by externally wound fixed wires and knots on the surface of the soft anchor, which will cause a long-term foreign body sensation after being inserted into the urethra, and the patient will be very painful

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