Bionic urethral catheterization device

Abstract

A bionic urethral catheterization device comprises a catheter and a balloon arranged on the upper section of the catheter, wherein the catheter includes a balloon filling medium convey cavity and a urine drainage cavity, or the catheter includes a balloon filling medium convey cavity, a urine drainage cavity and a lavage cavity; a check valve is arranged at the lower end of the balloon filling medium convey cavity; a hole communicated with the balloon is arranged on the section, which is covered by the balloon, of the balloon filling medium convey cavity; a urine inlet is arranged at the upper end of the urine drainage cavity and a urine outlet and a relief valve simulating the physiological function of bladder sphincter are arranged at the lower end of the urine drainage cavity. The bionic urethral catheterization device can prevent and cure uroschesis after indwelling the urethral catheterization device and avoid urinary tract retrograde infection and bladder adhesion.

Description

technical field [0001] The invention belongs to medical equipment, in particular to an indwelling catheterization device for patients after surgery, severe burns, urinary retention, advanced bladder cancer, urinary incontinence and the like. Background technique [0002] Existing urinary catheterization devices have two structures, wherein the catheter of one catheterization device is a two-lumen tube, which contains a balloon filling medium delivery chamber and a urine drainage chamber, such as figure 1 As shown, the catheter of another urinary catheterization device is a three-lumen tube, which contains a balloon filling medium delivery lumen, a urine drainage lumen, and an lavage lumen, such as figure 2 shown. When in use, both catheterization devices pass through the inflated high-pressure balloon (pressure > 100cmH 2 O) Fixed in the bladder. [0003] Under normal physiological conditions, the bladder collects and stores the urine produced by both kidneys, and can em...

AI Technical Summary

Problems solved by technology

[0004] (1) The urethral sphincter continues to open, and the urine and bacteria that drain out may retrograde into the bladder, causing infection;

[0005] (2) Although the continuous empty state of the bladder during surgery is beneficial to pelvic surgery and reduces the damage to the bladder during surgery, the bladder lacks a full state for a long time during non-operation, and bladder wall adhesions are prone to occur;

[0006] (3) The continuous drainage of the urinary catheter reduces the pressure gradient between the bladder and the outside world. In order to ensure smooth drainage, it is often necessary to use a catheter with a larger diameter and thicker wall, which will inevitably increase the outer diameter and hardness of the catheter. The hard thick urinary catheter increases the pressure on the urethral mucosa and causes ischemic injury;

[0008] (5) Some junior operators lack the anatomical knowledge of the urethra, and inject the filling medium (liquid or gas) to expand the balloon before the balloon enters the bladder cavity, resulting in urethral compression injury or even laceration

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