Transurethral ureter hard convection negative-pressure channel broken stone remover

Abstract

The invention discloses a transurethral ureter hard convection negative-pressure channel broken stone remover and relates to the field of medical apparatus and instruments. The transurethral ureter hard convection negative-pressure channel broken stone remover comprises an import mirror tube and a broken stone nephroscope tube which are used in matched with a ureteropyeloscope; the import mirror tube or the broken stone nephroscope tube is a metal hard tube, and the shape and the size of the cross section of the whole tube are the same; a sheath tube is a round thin-wall metal hard tube; a gap between the broken stone nephroscope tube and the sheath tube form a water outlet channel with equal cross section area; and [the outer circumference Fr(sheath tube) of the cross section of the sheath tube]*k is equal to the outside perimeter Fr(broken stone nephroscope tube) of the cross section of the broken stone nephroscope tube, and k is equal to 0.35 to 0.65. The transurethral ureter hard convection negative-pressure channel broken stone remover can solve the problem of operation failure caused by the facts that stones are difficult to appear and the operation channel is lost because the sheath tube is imported into the operation part at inaccurate position, and can solve the problems that the operation time is prolonged, the residual stones are excessive and the operation risk is increased because of low absorbing and removing speed of the broken stones and residues caused by the facts that the pressure in pelvis is not liable to rapid and free adjustment and a relief control valve cannot be adjusted flexibly and smoothly in the broken stone removing process.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a surgical device used for intracavity surgical treatment of kidney stones and ureteral bladder stones. Background technique [0002] The urinary tract is the human detoxification system. Urine is filtered by the kidneys and then enters the urinary tract. Because there are many toxins and sediments in the urine, during the metabolic process, sediments are often formed in the kidneys and urinary tract. The accumulation of sediment for a long time can form kidney or urinary tract stones. The presence of stones can cause symptoms such as low back pain or abdominal pain and hematuria. In the removal of kidney stones in urology, a relatively advanced "transurethral rigid convection negative pressure channel holmium laser lithotripsy" is currently used. The commonly used ureteroscope and some specific equipment and methods are used in the operation. Stone crushing and expellin...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a lithotripsy device with a rigid convective negative pressure channel through the urethra and ureter, which can solve the problem of the introduction of the outer sheath tube at the beginning of the operation of various existing lithotripsy devices with a rigid passage through the urethra and ureter. Inaccurate positioning of the surgical site leads to difficulty in stone exposure and loss of surgical access, resulting in surgical failure; and the pressure in the renal pelvis is difficult to adjust during the stone removal process of the lithotripsy device, and the existing pressure relief control valve is not flexible enough in adjustment , the adjustment is not smooth enough, after the stone is crushed, the removal speed of the stone is slow, and the residue is not easy to absorb, resulting in prolonged operation time, excessive residual stones, increased operation risk, and increased patient pain.

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