Combined water-lubricated urethral dilator

Abstract

The invention provides a combined water-lubricated urethral dilator. The combined water-lubricated urethral dilator comprises a hollow supersmooth catheter, a urethral probe sleeving the supersmooth catheter and a guide wire running through the supersmooth catheter, wherein the urethral probe is made of a PVC material; the surfaces of the urethral probe and the supersmooth catheter are covered by hydrophilic rubber films; the guide wire is a hook-shaped guide wire with a deformable front end. The supersmooth catheter is used for replacing the guide wire to guide the urethral probe, so that the combined water-lubricated urethral dilator is unlikely to zigzag in a urethra or drop out from a bladder or the like; the supersmooth catheter can drain urine inside the bladder, so that the situations of hypothesis and excessive bladder distention are avoided; the hydrophilic rubber films modify non-hydrophilic materials and lubricate the surface of equipment, so that injuries and secondary infection caused by insertion of the combined water-lubricated urethral dilator into the urethra and the bladder are reduced; when the combined water-lubricated urethral dilator is used, urethral mucosal injuries and urethral dilatation discomforts can be reduced better, the guide wire is avoided from slipping off in the dilating process, continuous drainage of the urine in the bladder is ensured, and the situations of urethral mucosal hypothesis, urethral perforation and excessive bladder distention are avoided.

Description

technical field [0001] The invention relates to the technical field of urethral dilators, in particular to a combined water-lubricated urethral dilator that does not need to be coated with lubricant. Background technique [0002] With the development of endovascular technology in urology, the transurethral approach has become the most important natural channel for urology diagnosis and treatment. Dilation of a narrow urethra with a urethral dilator is the most common approach when endoscopic access to the posterior urethra and bladder is not possible during endoscopic procedures (eg, transurethral resection of the prostate, transurethral resection of bladder tumors). When dilating the urethra, the urologist inserts a traditional urethral dilator into the urethra and bladder according to the anatomical structure of the urethra and operating experience. For male urethras with narrow and abnormal angles, urethral mucosal false passages, avulsions, and perforations are prone to ...

AI Technical Summary

Problems solved by technology

[0005] Compared with the traditional urethral dilator, the above-mentioned urethral dilator has the innovation of guide wire guidance, which reduces the blindness of urethral dilation, but in the process of using the guide wire to guide the dilation tube, there may be several defects: 1) guide wire The wire coils, reverses or forms a false tract in the urethra. 2) The guide wire is easy to slip out of the bladder during the guiding process and loses its guiding function. When the head of the dilator is located in the bladder, it can drain urine. 4) The guide wire and the urethral dilator cannot be seamlessly connected. When the dilator is expanded step by step, the gap between the two may increase the friction in the urethra and damage the urethra. The urethral mucosa or part of the urethral mucosa or scar tissue is mixed. 5) When dilating step by step, the urethral dilator needs to be repeatedly coated with lubricant. Because the lubricant can be diluted by the lavage fluid in the urethra, and the lubricant is applied unevenly, etc., it cannot Minimize the friction with the urethral mucosa, protect the urethral mucosa, and reduce the formation of urethral scars

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