Intracavitary extraction device for urinary system stones

Abstract

The present invention relates to a device for taking stones in the cavity of the urinary system, which is provided with a catheter and a guide wire. It is preformed into a strip-shaped pocket and the proximal side is open, and micropores are also arranged on the stone pocket. The device for removing stones in the urinary system cavity of the present invention can remove a large amount of broken stones, blood clots and pus at one time, without being limited by the inner diameter of the ureteral lumen or the inner diameter of the operation channel, the stone removal process will not miss the broken stones, and can effectively avoid broken stones. The stone is perfused back to the kidney by the water flow, and at the same time, it can prevent the stone from damaging the ureter wall, which is safe and reliable.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a settling device for calculi in the urinary system cavity. Background technique [0002] Kidney stones are one of the most common diseases in urology, and minimally invasive treatment techniques have replaced traditional open surgery as the most important treatment for kidney stones. The fundamental purpose of minimally invasive treatment is to completely remove stones. The flexible ureteroscope enters the kidney through the natural orifice of the human body, and the stone is crushed by the holmium laser. The effect is accurate, and it is one of the main minimally invasive treatment methods for kidney stones. In order to improve the stone-clearing rate, after the holmium laser pulverizes the stones, a stone basket is often used to collect the larger broken stones. [0003] Most of the stone baskets used at home and abroad are simple basket structures. For example, Chinese paten...

AI Technical Summary

Problems solved by technology

[0004] It can be concluded that there are still the following deficiencies in the current set of stone baskets: 1) Whether it is a triangular set of stone baskets or a mesh set of stone baskets, they all adopt the design of centripetal collection, and the stones are spherical after being set, rather than elliptical. Spherical, the number of set stones is limited by the inner diameter of the ureter lumen or the inner diameter of the operating channel, and it is necessary to repeatedly enter the ureter to take stones, which is inefficient; 2) There are gaps between the steel wires after the set stone basket is collected, especially the mesh set stone basket is tightened The mesh behind the inner core is easy to miss stones, and the stone basket itself cannot stop stones, and small stones and gravels are easily washed back to the kidney under the infusion of reverse water flow; 3) The edges and corners of stones will be exposed to the mesh of the stone basket Outside the hole, it is easy to cause the stone basket to fail to pass through the operation channel, and it is very easy to scratch the ureteral wall, causing surgical complications; 4) For blood clots or pus accumulated in the kidney, it is difficult to grasp the stone basket under a soft microscope. low efficiency

[0005] To sum up, there is an urgent need for a safe and reliable intracavitary extraction device for stones in the urinary system, which has high stone removal efficiency, does not miss broken stones, and can collect blood clots and pus at the same time. However, there are no reports about such devices so far

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