Ureter plugging device with balloon

Abstract

The invention relates to the technical field of medical equipment, in particular to a ureter plugging device with a balloon. The device comprises a catheter and a balloon, wherein the catheter is hollow inside, the outer wall of the catheter is wrapped with the balloon, and at least one through hole is formed in the side wall of the catheter inside the balloon. The device further comprises a guidewire and a plugging device, wherein one end of the guide wire passes through the side wall of the catheter and is connected with the plugging device, and the other end of the guide wire is pulled todrive the plugging device to stick to the end part of the catheter to block the opening. The device plays a drainage role before operation, and artificial hydronephrosis can be established by injecting physiological saline through the catheter; balloon inflation during the operation plays a blocking role, which can prevent broken stone from descending to the ureter during percutaneous nephrolithotomy, and thus the fact of residual stones in the ureter is avoided, so that operation difficulty and operation time are reduced, stone clearance rate is increased, and the occurrence rate of stones inthe ureter after operation is reduced. In addition, the device can be used for assisting the indwelling of double J tubes after percutaneous nephrolithotomy, shortening the operation time, reducing the occurrence of operation complications and reducing the treatment cost.

Description

technical field [0001] The invention relates to the technical field of medical equipment, more specifically, to a ureteral occlusion device with a balloon. Background technique [0002] The treatment of kidney stones is mainly based on surgery and drug excretion. For kidney stones > 20mm or complicated stones, percutaneous nephrolithotripsy is required. At present, percutaneous nephrolithotripsy has high lithotripsy efficiency, less surgical trauma, and faster postoperative recovery, and has become the main treatment for kidney stones. During percutaneous nephrolithotripsy, the surgeon usually places a ureteral catheter in the ipsilateral ureter before lithotripsy. However, the diameter of the traditional ureteral catheter is only 4Fr ~ 5Fr, and its ability to prevent stones from descending to the ureter during the operation is very limited. In the process of percutaneous nephrolithotripsy, there will often be a part of 3mm-4mm crushed stones moving towards the ureter a...

AI Technical Summary

Problems solved by technology

During the operation, when the lithotripsy descends beyond the upper ureter to the middle or lower ureter, it is quite difficult to remove it through the percutaneous nephroscope. Usually, it is necessary to put the patient in the lithotomy position again for ureteroscopic lithotomy to deal with the descending lithotripsy, thus increasing the The difficulty of the operation prolongs the operation time and increases the risk of related complications such as postoperative stone street; in addition, the stones descending to the ureter are often difficult to detect under the nephroscope, which may easily cause the surgeon to miss it, resulting in residual stones after the operation To the ureter, reducing the stone-free rate and surgical effect, increasing the risk of reoperation

[0003] At present, a mechanical occluder is proposed abroad, which enters the ureter through a ureteroscope and is placed in the upper ureter. After the percutaneous renal channel is established, the occluder forms an umbrella-like structure through manipulation to prevent stone fragments from falling into the upper ureter. , but the umbrella-shaped structure formed by the occluder often has pores, which cannot completely block the gravel; and the production cost is high and expensive

In addition, Chinese patent CN201510386032.4 discloses an occluder for ureteroscopic lithotripsy. The occluder balloon is wrapped on the outer surface of the catheter and forms a closed cavity with the catheter. Normal saline makes the occlusion balloon expand outwards to fit the inner wall of the ureter, tightly seal the ureteral calculi, and prevent ureteral stones from escaping. However, on the one hand, the one-way valve is not convenient for retrograde injection of contrast medium and retrograde injection of contrast agents to the renal pelvis and calyces. Water injection to establish artificial hydronephrosis; on the one hand, the structure is complex and the production cost is high

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