Covered basket type ureteral calculus blockage extractor

Abstract

The invention relates to a covered basket type ureteral calculus blockage extractor provided with a catheter and a guide wire. The far end of the guide wire is provided with a basket wire made of shape memory and super elastic material, the far end of the basket wire is gathered to form a basket, and the basket is fixed to a blocking film in a scoop shape in a pre-shaped manner; during usage, the basket wire is in a curved shape, and the blocking film is unfolded through the basket wire; during idle, the basket wire and the blocking film are both accommodated in the catheter. The covered basket type ureteral calculus blockage extractor can be placed in the ureter easily, is prevented from pushing calculus to move reversely towards kidneys and damaging the wall of the ureter and is capable of blocking the ureter completely, the calculus and calculus pieces are prevented from returning to the kidney through injected water effectively, the covered basket type ureteral calculus blockage extractor is not prone to deformation during calculus drawing and extraction, is prevented from friction with the wall of the ureter and is capable of extracting all calculus once, and the purpose of extracting calculus effectively is achieved.

Description

Technical field [0001] The present invention involves the field of medical device. Specifically, it involves a diaphragm -based ureteral stones blocking device. Background technique [0002] The incidence of urinary stones is as high as 5%-10%, which can be seen in any part of the kidney, bladder, ureter and urethra, and kidney and ureteral stones are common.Ureutal mirror fragmentation is performed by the natural cavity of the human body. It has the advantages of minimally invasive and gravel. It is one of the main treatment methods of ureteral stones at present.However, there are also certain insufficient ureteral mirror mosaic mosaic shattering: 1. The middle, upper stones and stone fragments of the ureter are easily poured back to the kidneys of the water flow or gravel tools; 2.Lack of fast and effective locations. [0003] The top of the ureteral stones through the tool seal is an important means to prevent ureteral stones from being reborn back to the kidneys. At present, ...

AI Technical Summary

Problems solved by technology

However, the current ureteroscopic lithotripsy also has certain deficiencies: 1. Stones and stone fragments in the middle and upper ureters are easily washed back into the kidney by the perfusion water flow or the recoil force of the lithotripsy tool; 2. Residual stone fragments in the ureter lumen Lack of quick and effective way to remove

However, it cannot completely block the lumen of the ureter, especially during the process of dragging stones, the shape of the device is likely to change due to water injection into the working channel of the endoscope, causing the stones to slip between the device and the ureter wall, or Due to the large number of broken stones, the stones and the occluder are embedded in the ureter, and there is a risk of damage to the ureteral mucosa

In addition, the existing membranous occluders or balloons are often too large in size, which is not as convenient as a stone basket during placement, and it is easier to push stones back to the kidney

[0006] In summary, there is an urgent need for a ureteral calculus blocking extractor that is completely blocked, convenient for stone removal, not easily deformed when dragging the stone, does not damage the ureteral wall, and is easy to place and does not easily cause stone displacement. Not yet reported

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