Urethral stent and placement system

Abstract

The invention discloses a urethral stent and a placement system. The urethral stent is mainly used for supporting prostate urethral obstructions and achieving automatic urination. The urethral stent is composed of a prostate urethral stent body, connecting lines, a soft anchor, a taking line, an adjustable limit device, a supporting rod and a handle. The prostate urethral stent body is made of medical silicone materials, the head end of the prostate urethral stent body is of a petal-shaped spherical structure, the tail end of the prostate urethral stent body is connected with the soft triangular anchor through the connecting lines, the ends of the connecting lines are directly fixed into holes in the two sides of the tail of the stent body through viscose and penetrate through a middle hole in the soft anchor, the soft anchor is fixed to the connecting lines through viscose, a pulling line does not need to be wound around the outer pipe wall of the stent body but is sleeved with a pulling line fixing ring and fixed by viscose, and therefore the function of fixing the stent body is achieved. The supporting rod is inserted in a stent pipe, and the outer wall of the supporting rod ismarked with scales; the adjustable limit device is arranged on the outer wall of the supporting rod. Compared with metal and nonmetal stents of the same type, the silicone prostate urethral stent is simpler in structure and more convenient and safer to operate. The petal-shaped spherical structure at the head end of the stent pipe is placed in the human body and then naturally expands at the neckof the bladder to prevent the stent body from misaligning. The petal-shaped structure can obviously improve the passability of urine and reduce the contact area of a triangular area of the bladder, and the inner discomfort of a patient is alleviated.

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 f...

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 to 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, and the diameter of the larger Fr24 is difficult to place, which may easily cause urethral mucosal damage; , 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 fixing 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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