Taking-out system for urinary system stent

Abstract

The invention relates to a taking-out system for urinary system stent, the system comprises a working sleeve capable of being arranged in a body, and an operating handle connected with the outer end, a stent taking-out channel with the front end extending to a stent placement part and an auxiliary channel are formed in the working sleeve; the stent extraction channel comprises a near-end catheter, a far-end catheter and a far-end catheter protection tube; and the stent auxiliary channel comprises a water injection channel and an imaging channel. A working sleeve of the stent taking-out system enters the human body, after the working sleeve reaches the tail end of the stent, the near-end catheter is fixed to the tail end of the stent, the far-end catheter is fixed to the front end of the stent, and the stent is taken out by operating an adjusting knob on an in-vitro handle. The taking-out system for the urinary system stent is simple in use method and convenient to operate. The stent can be suitable for retrograde and smooth operation in urinary surgery, and is suitable for but not limited to related fields of hepatobiliary surgery stents, esophageal stents, intestinal stents, tracheal stents and the like.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a system for taking out a urinary stent. Background technique [0002] Implantation of stents is an important means of clinical treatment of urinary system diseases such as ureteral stricture, urethral stricture, and bladder neck stricture. After a period of time after the stent is implanted in the narrow area, it is very easy to cause infection and fever, stone blockage of the pipeline, unsatisfactory support effect, stent displacement and other related complications, which may lead to implantation failure. Therefore, how to remove the stent safely, easily, and with low damage has brought great challenges to clinicians. Taking ureteral stents as an example, at this stage, the main method of removing them is the use of endoscopes and foreign body forceps. Insert the endoscope to the part where the stent can be seen, insert the foreign body forceps through the endoscope,...

AI Technical Summary

Problems solved by technology

In addition, the utility model patent CN 204683849 U "a ureteral stent removal device" discloses a ureteral stent with a urethral probe and a magnet at the end of the tweezers to remove a ureteral stent with a phase-adsorbing magnet at the end. Restricted

[0003] Both of the above two stent removal devices cannot avoid the damage to the surrounding tissue caused by continuous mechanical dragging, and the stent cannot be observed in real time during removal, which leads to an unsmooth operation process and increases the difficulty of the operation

However, for stents with large inner diameters, especially metal stents with a certain strength, there is no suitable removal device

[0004] Moreover, the ureteral stents currently used clinically have poor compressive capacity, and cannot meet the effective support strength when treating complex ureteral strictures, resulting in lumen occlusion

In addition, the base material of the ureteral stent is nickel-titanium alloy, which continuously releases nickel ions in the environment of human tissue fluid such as urine, and the dissolved nickel ions have potential sensitization, teratogenic, and carcinogenic risks

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