Special-shaped balloon type ureteral calculus blocking extractor

Abstract

The invention relates to a special-shaped balloon type ureteral calculus blocking extractor. The special-shaped balloon type ureteral calculus blocking extractor comprises a hollow operation rod with the near end open and the far end closed, the far-end section of the operation rod is provided with an embedment groove, an annular balloon is arranged in the embedment groove, the outer periphery of the balloon is provided with a blocking film which surrounds the outer periphery of the balloon by at least one round, and the interior of the balloon is communicated with a cavity of the operation rod. The special-shaped balloon type ureteral calculus blocking extractor is small in size and easy to place in the ureter, the ureter can be completely blocked without pushing ureteral calculi to move reversely towards the kidney or causing damage of ureteral walls, and the calculi and calculus fragments can be effectively prevented from being flushed back to the kidney by perfusion water, the extractor is less prone to calculus incarceration, deformation and friction of ureteral walls during dragging for calculi extraction, all calculi can be extracted for one time, and accordingly high-efficiency calculus extraction is realized.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a special-shaped balloon-type ureteral 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...

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] To sum up, there is an urgent need for a ureteral calculus blocking extractor that is easy to place, not easy to cause stone displacement, not easy to deform when removing gravel, completely blocked, not easy to cause stone incarceration and damage the ureter wall, and convenient to remove stones. However, there are no reports on such devices

Images