Membrane type ureteral calculus blocking extractor

Abstract

The invention relates to a membrane-type ureteral calculus blocking remover, which is provided with an operating rod with an open proximal end and a closed distal end, and a blocking membrane is provided on the distal end section of the operating rod; Looking at the other end from one end, the occlusion film constitutes a circular block; the distance from the free side of the occlusion film to the proximal end of the operating rod is less than the distance from the fixed side of the occlusion film to the proximal end of the operating rod; A through hole is also provided on the wall, and the water flowing out from the cavity of the operating rod through the through hole exerts force on the inner wall of the blocking object. The ureteral calculi blocking remover of the present invention is small in size, easy to be placed in the ureter, does not push the calculus retrograde to the kidney and causes ureteral wall damage, and can completely block the ureter, effectively preventing calculus and calculus fragments from being washed back into the kidney by perfusion water. Incarcerated stones are not easy to occur, and the process of dragging and removing stones is not easy to deform and rub against the ureteral wall, and all stones can be removed at one time to achieve the purpose of efficient stone removal.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a membrane-type ureter calculus blocking extractor. Background technique [0002] The incidence of urinary stones is as high as 5%-10%, which can be found in any part of the kidney, bladder, ureter and urethra, and kidney and ureter stones are the most common. Ureteroscopic lithotripsy is carried out through the natural orifice of the human body. It has the advantages of minimally invasive and accurate lithotripsy, and is currently one of the main treatment methods for ureteral calculi. 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 There is no quick and effective way to take it out. [0003] Blocking the upper part of the ureteral...

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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