Urethral catheterization dilatorTechnical Field
The application relates to a medical instrument, in particular to a urethral dilator.
Background
Urethral sound 30 is commonly used to dilate the urethra, particularly for patients with prostatic hypertrophy, which results in difficult urination, and prior to insertion into the urinary canal, it is often necessary to insert the urethral sound into the urethra of a male patient prior to its expansion. The urethral probe is a steel rod-shaped body, the front end of the urethral probe is bent, and due to the physiological bending of the human body urethra, the urethral probe is difficult to insert, and the inner mucosa of the urethra is often damaged by the urethral probe and even penetrates through the urethra as shown in fig. 7.
Disclosure of Invention
In view of the above problems, the present application aims to propose a urethral dilator for urethral dilation, which can flexibly adapt to the physiological curve of the urethra on the one hand and is not easy to cause damage to the mucosa inside the urethra on the other hand.
The urethral catheterization dilator comprises an outer channel unit and an inner dilating unit;
The outer channel unit comprises a contractible reticular pipeline, the front end of the reticular pipeline comprises a sphere, and the rear end of the reticular pipeline forms a horn-shaped opening; the net-shaped pipeline is formed by intersecting a plurality of first spirals formed by rotating clockwise and a plurality of second spirals formed by rotating anticlockwise, wherein at least one of the plurality of first spirals and the plurality of second spirals is made of elastic metal;
the inner expansion unit comprises a rod body which is made of elastic metal and is easy to elastically bend, wherein the front end of the rod body is provided with a cylindrical expansion head, and the two ends of the expansion head are provided with arc surfaces;
The inner expansion unit can be inserted into the mesh tube from a horn-shaped opening at the rear end of the mesh tube.
Preferably, a portion of the anterior segment surrounding the mesh tube is covered with a silicone membrane corresponding to the location of the patient's prostate.
Preferably, the shaft has graduations formed thereon to indicate the depth of insertion into the patient's urethra.
Preferably, the rear end of the lever body is formed with a handle.
Preferably, the outer side of the outer channel unit is coated with a lidocaine gel.
Preferably, at least one of the first plurality of spirals is made of a resilient metal and at least one of the second plurality of spirals is made of a resilient metal.
The urethral dilator is designed into an outer channel unit and an inner dilating unit, and the traditional urethral probe is decomposed into two parts for being respectively executed according to the functions of entering the urethra and dilating the prostate. Therefore, when the urethral catheterization dilator is inserted into the urethra, the external channel unit can be easily inserted into the urethra because the external channel unit has smaller diameter and does not have the effect of expanding the prostate, after the external channel unit is inserted into the urethra, the internal expansion unit is inserted into the external channel unit, at the moment, the expansion head of the internal expansion unit moves in the reticular pipeline due to the existence of the reticular pipeline of the external channel unit, the reticular pipeline protects the urethral mucosa, and the reticular pipeline of the external channel unit and the rod body made of elastic metal of the internal expansion unit are easy to adapt to the physiological curve of the urethra.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of the outer channel unit of the urinary dilator of the present application;
fig. 2 is a schematic structural view of a second embodiment of the outer channel unit of the urinary dilator of the present application;
FIG. 3 is a schematic view of the structure of the inner expansion unit of the urinary catheter expander of the application;
FIG. 4 is a schematic illustration of the insertion of the inner stent unit of FIG. 3 into the outer channel unit of FIG. 1;
FIG. 5 is a schematic illustration of the insertion of the inner stent unit of FIG. 3 into the outer channel unit of FIG. 2;
FIG. 6 is a schematic cross-sectional view of the outer channel member after insertion of the inner expansion member;
fig. 7 is a schematic view of a prior art urethral sound after insertion into the urethra of a male patient.
Detailed Description
The urinary catheter dilator according to the present application will be described in detail with reference to the accompanying drawings.
The urinary catheter of the present application comprises an outer channel member 10 and an inner dilating member 20;
The outer channel unit 10 includes a collapsible mesh tube 12, a front end of the mesh tube 12 including a ball 11, and a rear end of the mesh tube 12 forming a horn-shaped opening 13, the mesh tube 12 being formed by crossing a plurality of first spirals formed by rotating in a clockwise direction and a plurality of second spirals formed by rotating in a counterclockwise direction, the first spirals being woven with the second spirals or being formed by laser engraving of a memory metal.
To facilitate insertion of the outer channel unit 10 into the urethra, at least one of the first and second pluralities of spirals is made of metal, preferably at least one of the first spirals is made of resilient metal and at least one of the second spirals is made of resilient metal, and the diameter of the constricted mesh tube 12 is smaller than the diameter of the sphere 11. The ball 11 may be metallic, integrally fixed with the first or second spiral of metal.
The inner expansion unit 20 comprises a rod body 22 which is made of elastic metal and is easy to elastically bend, a cylindrical expansion head 21 is formed at the front end of the rod body 22, arc surfaces are formed at the two ends of the expansion head 21, the diameter of the expansion head 21 is far greater than that of the rod body 22 and the sphere 11, and the expansion head 21 is used for expanding the prostate position of the urethra.
The inner expansion unit 20 can be inserted into the mesh tube 12 from the flared opening 13 of the rear end of the mesh tube 12.
A silicone membrane 14 is coated around a portion of the anterior segment of the mesh tube 12, as shown in fig. 2, and is preferably formed on the outside of the mesh tube corresponding to the location of the patient's prostate to prevent the mucous membrane of the urethra from entering the mesh tube through the window formed by the intersection of the first spiral and the second spiral due to the hypertrophy of the prostate at the location of the prostate, and is distended and injured as the distension head proceeds.
The rod body 22 is formed with graduations to indicate the depth of insertion into the urethra of the patient, so that the operator can clearly understand the depth of insertion of the expansion head 21, judge whether the expansion head 21 reaches the position corresponding to the prostate, and if so, make the expansion head 21 stay at the position to perform long-time support expansion.
The rear end of the rod body 22 is formed with a handle 23 to facilitate the pushing in and pulling out of the inner expansion unit 20.
The outer side of the outer channel unit 10 is coated with lidocaine gel, which on the one hand serves a lubrication function and on the other hand serves an anesthesia function.
When the external channel unit is used, the external channel unit is firstly inserted into the urethra from the urethral orifice of a patient until the ball enters the bladder, then the internal expansion unit is inserted from the horn orifice of the external channel unit, so that the expansion head stays at the position of the prostatic gland of the urethra, the position is supported and expanded, after a preset time period, the internal expansion unit is firstly withdrawn, then the external channel unit is withdrawn, and the urinary catheter is inserted into the urethra of the patient after the external channel unit is withdrawn.