Membrane type ureteral calculus blocking removal machine

Abstract

The invention relates to a membrane type ureteral calculus blocking removal machine which is provided with a hollow operating rod. An opening is formed in a near end of the operating rod, a far end of the operating rod is closed, and a blocking membrane is arranged in a section of the far end of the operating rod; the blocking membrane forms a circular blocking object when seen from an end of the operating rod to the other end of the operating rod in a service state; the distance from a free edge of the blocking membrane to the near end of the operating rod is smaller than the distance from a fixed edge of the blocking membrane to the near end of the operating rod; through holes are further formed in the walls of the operating rod, and water current which flows out of a cavity of the operating rod via the through holes generates acting force on the inner walls of the blocking object. The membrane type ureteral calculus blocking removal machine has the advantages that the ureteral calculus blocking removal machine is small in size and easy to place in the ureters of patients, and calculi can be prevented from being pushed to reversely move towards the kidneys of the patients and injure the walls of the ureters of the patients; the ureters of the patients can be completely blocked, so that the calculi and fragments of the calculi can be effectively prevented from being flushed back into the kidneys of the patients by the poured water current, calculus incarceration can be prevented, deformation and rubbing of the walls of the ureters of the patients can be prevented in calculus dragging and removing procedures, all the calculi can be removed at one step, and the purpose of efficiently removing the calculi can be achieved.

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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