An occluder for ureteroscopic lithotripsy

Abstract

The invention relates to a plugging device for ureteroscope lithotripsy. The plugging device comprises a one-way valve switch, a guide pipe, a handle, a plugging balloon, a protecting film, a metal guide wire and a small hole, the plugging balloon wraps the outer surface of the guide pipe, a sealed balloon cavity is formed between the plugging balloon and the guide pipe, the diameter of the balloon cavity is 5-25mm, the plugging balloon is elliptical or spherical, the length of the plugging balloon is 0.5-5cm, the small hole is formed in the guide pipe wrapped by the plugging balloon, a far end of the guide pipe is fixedly connected with the metal guide wire, the metal guide wire is wrapped by the protecting film, a near end of the guide pipe is fixedly connected with the handle, stripes are arranged on the handle, and the one-way valve switch is connected at the near end of the guide pipe, provided with a valve disk and connected with an injector or inflation valve. The plugging device has the advantages that upward escape of a ureter calculus can be effectively prevented, crushed stone plugging success rate is high, operation is simple, and surgical safety is fine.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an occluder for ureteroscopic lithotripsy. Background technique [0002] Ureteral calculus is a common disease in urology. 95% of the calculi can be resolved by ureteroscopic lithotripsy. Obstruction by calculi often leads to damage to renal function, and in severe cases, it can cause renal failure. [0003] Currently URL has become the best treatment for ureteral calculi. It has the advantages of small surgical trauma and quick recovery. [0004] However, since ureteral calculus obstruction often leads to the expansion of the ureter above the obstruction and the accumulation of water in the kidney, when using ureteroscopy for stone removal, it is necessary to flush water retrogradely during the operation to ensure a clear surgical field of view, but the stones often escape into the kidney along with the retrograde water flow. Thus affecting the success rate of ston...

AI Technical Summary

Problems solved by technology

The stone basket generally can only capture one stone at a time, and the operation time for multiple stone extractions is long; the stone basket is a mesh structure, and its mesh diameter is generally more than 1mm, and it is easy to slip through the mesh for stones smaller than the mesh diameter; If you use the stone removal basket blindly to remove stones in the stone-taking style, it may cause ureteral perforation; oversized stones may be pulled out forcibly with a mesh basket to cover the stones, which may cause ureteral tearing; the metal wire of the mesh basket may be interrupted by the laser

[0006] The occluder of its diaphragm structure is a single-piece film with soft material. After the single-piece film is compressed and folded, the occluder has a large gap. Gravel may pass through the gap under the impact of water pouring and energy, resulting in insufficient sealing; secondly, because of the large gap and soft material of the tethered diaphragm sealing device, it is difficult to drag. When crushed stones are collected, the blocking force of the occluder is not strong, and the crushed stones will escape from between the occluder and the ureteral wall, resulting in dragging failure; moreover, the diaphragm enters the ureter in an expanded state, and the volume is relatively large. It is not easy to pass through the stones to reach the upper part of the ureteral stones, and it is easy to cause the stones to move up during the placement process, which may cause the failure of the operation

[0007] In summary, there is an urgent need for a ureteroscopic lithotripsy occluder that is used to prevent ureteral stones from escaping, is convenient for operation, and has a high success rate of occluding lithotripsy. No report

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