Taking-out system for urinary system stent

A urinary system and catheter technology, which is applied in the field of medical devices, can solve the problems of stent type limitation, increase the difficulty of surgery, and sensitization, and achieve the effect of accurate stent removal process, increase the success rate of surgery, and reduce the difficulty of surgery

Pending Publication Date: 2021-06-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 i

Method used

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  • Taking-out system for urinary system stent
  • Taking-out system for urinary system stent
  • Taking-out system for urinary system stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Patients implanted with bladder neck stents had to have the stents removed due to problems such as stent displacement and recurrent stenosis. During the bladder neck stent removal operation, the stent removal channel 3 assembled with the distal catheter protection tube 8 (the distal catheter 7 has been assembled) and the proximal catheter 6 passes through the operation channel reserved on the external operation handle 1 as a whole, and It is fixed with the operating handle outside the body, and the front end is placed in the channel 2 of the working sleeve inside the body. The operation adopts retrograde insertion and extraction. One person holds the operating handle 1 to perform the water injection operation to flush out the obstructed tissue, and at the same time adjusts the imaging system to observe the operation position in real time, and guides the extraction system to the end of the stent. After the other person adjusts the stent take-out channel 3 and reaches th...

Embodiment 2

[0061] Ureteral stents are the most difficult to remove among urinary stents. Metal ureteral stents (Uventa TM ) is a three-layer structure of nickel-titanium alloy mesh-polytetrafluoroethylene film-nickel-titanium alloy mesh. When this kind of bracket is taken out, one person holds the operating handle 1 to perform the water injection operation, and guides the removal system to the end of the bracket. The other person adjusts the proximal catheter joint 11 on the extracorporeal operating handle 1, moves the anchor buckle 162 at the end of the proximal catheter 6, and fixes it with the metal edge at the end of the bracket. Adjust the anchor buckle 161 at the end of the distal catheter 7 and fix it with the metal edge of the stent head. Adjust the distal catheter protection tube 8 to the head of the stent, and adjust the position of the proximal catheter 6 outward. After the stent is detached from the ureteral tissue, reversely adjust the knob 17 to detach the distal cathete...

Embodiment 3

[0063] Nickel-free austenitic stainless steel ureteral stent design structure as follows Figure 11 shown. When this kind of bracket is taken out, one person holds the operating handle 1 to perform the water injection operation, and guides the removal system to the end of the bracket. The other person adjusts the proximal catheter joint 11 on the extracorporeal operating handle 1, moves the anchor buckle 162 at the end of the proximal catheter 6, and fixes it with the metal edge at the end of the bracket. Adjust the anchor buckle 161 at the end of the distal catheter 7 and fix it with the metal edge of the stent head. Adjust the distal catheter protection tube 8 to the head of the stent, and adjust the position of the proximal catheter 6 outward. After the stent is detached from the ureteral tissue, reversely adjust the knob 17 to detach the distal catheter protection tube 8 from the stent, and at the same time adjust the distal catheter 7 to detach it from the stent, and con...

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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,...

Claims

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Application Information

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IPC IPC(8): A61F2/966A61F2/97
CPCA61F2/966A61F2/97
Inventor 赵静张炳春杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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