Urethral catheter and ureteral stent device comprising same

Abstract

The invention discloses a urethral catheter and a ureteral stent device comprising the same, which are used for leading out a pull wire of a ureteral stent tube in the body of a patient. The urethral catheter comprises an outer sheath and an inner core slidably sleeved in the outer sheath, the inner surface of the head of the outer sheath and the outer surface of the head of the inner core enclose a pull wire fixing cavity, and a magnetic portion is arranged at a position close to the head of the inner core. When the urethral catheter is used for leading out the pull wire, the urethral catheter is fed into an anterior urethra by means of conventionally indwelling the urethral catheter, the pull wire is embedded into the pull wire fixing cavity by pulling the inner core backwards after the magnetic portion sucks the pull wire, the urethral catheter is integrally pulled outwards, and then the pull wire can be smoothly led out of a urethral orifice. The position of the pull wire is determined by the aid of the magnetic portion, the pull wire is clamped and led out by means of coordination of the inner core and the outer sheath, and the pull wire can be led out of the body of the patient by means of simple operation.

Description

technical field [0001] The invention relates to the field of medical instruments, more specifically, to a urinary catheter, and also to a ureteral stent device using the urinary catheter. Background technique [0002] A ureteral stent is a medical device in the form of a long, thin tube. When the ureter is obstructed by stones, scar stenosis, tumor, etc., a ureteral stent can be implanted in the patient to support the ureter so that urine can drain from the kidney to the bladder. At the same time, ureteral surgery (including ureteroscopy, lithotripsy, and open ureteral surgery) and renal pelvis surgery (eg, pyelolithotomy, pelvis plasticity, percutaneous nephrolithotomy, etc.) routinely require placement of ureteral stents. At present, there is no ureteral stent that can be permanently placed in the body. After a period of use, it is necessary to remove the ureteral stent through an invasive operation, usually by cystoscopy. Although cystoscopic operation is not a major op...

AI Technical Summary

Problems solved by technology

However, since the traction wire is deployed after the ureteral stent is implanted in the patient, when the operator needs to take out the ureteral stent through the traction wire, the operation is inconvenient because the specific position of the traction wire is not clear.

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