Ureteral stone movement plugging device

Abstract

The invention provides a ureteral stone movement plugging device. The ureteral stone movement plugging device consists of a catheter (1), an expandable compressed airbag (2) and a valve (3), wherein the catheter (1) adopts a hollow long tubular structure with elasticity and is made of elastic silica gel or latex; an opening is formed in the front end of the catheter (1); the opening is positioned inside the expandable compressed airbag (2); the expandable compressed airbag (2) is arranged at the front end of the catheter (1), and in the expanded state, the expandable compressed airbag (2) is ellipsoid-shaped; the valve (3) is positioned at the tail end of the catheter (1), and a syringe connecting port (4) is formed in the valve (3). The front section of the catheter (1) of the ureteral stone movement plugging device can enter a ureter through an operating chamber of a ureteroscope to relatively fix the airbag (2) into a ureteral cavity at the upstream of a stone or at an outlet of a renal pelvis, so that a kidney filling and expanding destructive effect of a water flow injected by the ureteroscope is eliminated and any passage through which the stone may move or escape into the renal pelvis is completely blocked.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a mobile blocking device for ureteral calculi. Background technique [0002] Ureteral calculus is the most common inpatient disease of the urinary system, and it is also the disease with the largest number of urological operations. More than 400,000 ureteral calculi operations are performed in my country every year. Ureteral stones are divided into upper ureteral stones, middle ureteral stones and lower ureteral stones. At present, the operation of ureteral calculi basically relies on minimally invasive intracavitary crushing or extraction. Common surgical methods include ureteroscopy combined with holmium laser lithotripsy, percutaneous nephrolithotomy and laparoscopic ureterolithotomy. [0003] It is the most common and efficient minimally invasive treatment method for ureteral calculi to use ureteroscope to go retrograde through the urethral bladder and ureter to reach the site...

AI Technical Summary

Problems solved by technology

Moreover, since the shape and diameter of the upper section of the ureter change greatly after expansion, it is actually difficult to achieve a tight fit between the expanded inner meridian of the ureter and the curved surface of the stone-blocking net. In this way, many small stones can also occur under the impact of water flow and laser excitation. The displacement is flushed into the renal pelvis, causing stones to enter the kidney to produce kidney stones and promote the occurrence of residual stones after surgery

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