Built-in catheter

Abstract

The invention provides a built-in catheter. The built-in catheter comprises a catheter body and a control valve, wherein the inside of the catheter body is hollow and serves as a urine guide cavity, one end of the catheter body is provided with a urine inlet, the other end of the catheter body is provided with a urine outlet, the catheter body comprises a partes prostatica part, a membranous partand a bulb part, the control valve is positioned inside the urine guide cavity and is used for controlling the on-off state of the urine guide cavity, in order to enable the catheter body to be stablyfixed inside the male urethra, the partes prostatica part is provided with a partes prostatica bulge, the bulb part is provided with a bulb bulge, the membranous part is provided with a membranous sinking part, the partes prostatica bulge, the bulb bulge and the membranous sinking part between the partes prostatica bulge and the bulb bulge are bent-dumbbell-shaped in the male urethra, thus the front-back movement of the catheter body can be prevented, and meanwhile, the interference pressing for the neck of the male bladder and the urethra can be eliminated.

Description

technical field [0001] The invention relates to a built-in urinary catheter, in particular to a device for controlling the drainage of urine according to pressure changes in the human bladder, and belongs to the technical field of medical devices. Background technique [0002] Clinically, there are many patients with paraplegia and hemiplegia caused by cerebrovascular and spinal cord vascular diseases, as well as coma patients and high paraplegia patients, etc. Most of them are accompanied by urination obstacles, and indwelling catheterization has become a common method to solve the urination disorders of the above-mentioned patients. means. The catheterization device used in traditional indwelling catheterization consists of a through-type catheter inserted into the urethra and a urine bag connected to the lower end of the catheter. The urinary catheter continues to export the urine in the bladder, resulting in the failure to form a normal intravesical pressure in the blad...

AI Technical Summary

Problems solved by technology

The urinary catheter continues to export the urine in the bladder, resulting in the failure to form a normal intravesical pressure in the bladder. The patient's detrusor muscle and internal bladder sphincter are in a disused state for a long time, and they cannot use the functions of low-pressure urine storage and low-pressure urination. The principle of urinary continence protects the entire urinary tract system, and the through-type catheter is directly led out of the body from the inside of the human bladder, which increases the risk of infection of the human bladder. Long-term use of the through-type catheter will cause the following risks:

[0003] 1. The continuous drainage of the urinary catheter makes the patient's bladder lack of fullness for a long time, which may easily lead to adhesion of the bladder wall;

[0004] 2. 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 increase the outer diameter and hardness of the tube wall, which will cause pressure on the urethral mucosa of the patient and cause ischemic damage;

[0005] 3. The continuous drainage of the urinary catheter causes adaptive changes in the nerve receptors of the bladder, which cannot sense the filling of urine in the bladder and complete the urination reflex, resulting in urinary retention;

[0006] 4. While the catheter is draining urine, the bacteria on the outer wall of the catheter will reversely infect the urinary system;

[0007] 5. The urinary catheter is fixed at the neck of the bladder of the human body by a balloon, and long-term compression causes ischemic damage to the neck of the bladder of the patient;

[0008] 6. In order to avoid urinary catheter leakage, a larger size catheter is often selected, which will cause pressure on the urethral mucosa of the patient and cause ischemic damage, especially for the narrow membranous urethra, which is vulnerable to urethral trauma parts that are more susceptible to compression

[0011] Chinese Patent Publication No. CN2478610 discloses a catheter for local treatment of the prostate, which includes a tube body and a lumen. Two airbags, after inflated, the airbags are respectively stuck in the bladder opening and the urethral bulb, so that the catheter is fixed. This device also has the disadvantage of oppressing the human bladder neck

[0012] In the non-patent literature "Cause Analysis and Nursing of 28 Cases of Indwelling Balloon Catheter Discomfort" (selected from "Qilu Nursing Journal" 2007, Issue 19), it is disclosed that when using a balloon catheter, the pressure in the catheter balloon If the pressure is too high, the pressure on the neck of the bladder and the urethra will be too high, resulting in bladder spasm, pain and discomfort, and the feeling of wanting to urinate. The above literature further proves that the indwelling balloon catheter has the disadvantage of continuous compression of the neck of the human bladder.

Images