CN219090732U - Urinary catheter - Google Patents

Abstract

The utility model discloses a urinary catheter, which belongs to the technical field of medical instruments and comprises a catheter body and a mandrel, wherein the mandrel is sleeved in the catheter body, the catheter body comprises a catheterization cavity, an indwelling cavity, an infusion cavity and a core cavity, and the catheterization cavity, the indwelling cavity and the infusion cavity are arranged around the core cavity in an array manner; the mandrel comprises a plurality of connecting units, and the connecting units are rotationally connected; with the arrangement, the urinary catheter of the utility model can maintain sufficient strength when being passed into the urethra of a patient with a blocked urinary tract, and can alleviate the problem that the conventional metal urinary catheter cannot be remained in the urinary tract of the patient for a long time.

Description

Urinary catheter

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a urinary catheter.

Background

The time span of some large-scale operations in clinic is longer and the patient needs general anesthesia, so that the urine tube needs to be inserted into the urine tube to guide the urine for the patient to prevent urine retention or bladder rupture, but the following problems easily occur in the operation process of the indwelling urine tube for the middle-aged and elderly people:

the urethra of the old men is narrow, and the common urinary catheter commonly used in hospitals is insufficient in hardness, so that the intubation process is difficult.

Therefore, it is necessary to design a catheter, in particular a catheter, which has a high overall hardness and can be bent.

Disclosure of Invention

In order to overcome the problems in the background art, the utility model adopts the following technical scheme:

the catheter comprises a catheter body and a mandrel, wherein the mandrel is sleeved in the catheter body, the catheter body comprises a catheterization cavity, an indwelling cavity, an infusion cavity and a core cavity, and the catheterization cavity, the indwelling cavity and the infusion cavity are arranged around the core cavity in an array manner; the mandrel comprises a plurality of connecting units, and the connecting units are rotationally connected.

Further, a first end of the mandrel is connected to the proximal end of the core lumen and a second end of the mandrel is connected to the distal end of the core lumen.

Further, each of the connection units is not parallel to two rotation planes which can be formed after the connection units are connected with two adjacent connection units respectively.

Further, one end of the connecting unit is provided with a placement block with a through hole, the other side of the connecting unit is provided with a containing groove with a connecting shaft, the width of the placement block is not larger than that of the containing groove, and the connecting shaft is rotationally connected with the through hole, so that the connection of the adjacent connecting units is realized.

Further, the outer surface of the pipe body further comprises a threaded portion comprising at least one thread strip.

Further, one end of the tube body far away from the patient is a far end when the catheter is used, a catheter, an indwelling tube and an infusion tube are arranged at the far end of the tube body, the catheter is communicated with the catheterization cavity, the indwelling tube is communicated with the indwelling cavity, and the infusion tube is communicated with the infusion cavity.

Further, the proximal end of the catheter body is provided with a urethral catheterization valve communicated with the urethral catheterization cavity, the urethral catheterization valve is a one-way valve, and the flow direction of liquid passing through the urethral catheterization valve is from the inside of the patient to the urethral catheterization cavity.

Further, the proximal end of the tube body is provided with an infusion valve communicated with the infusion cavity, the infusion valve is a one-way valve, and the liquid flowing through the infusion valve flows from the infusion cavity to the inside of the patient.

Further, the indwelling cavity is provided with an expansion part at one side close to the proximal end of the tube body, the expansion part is arranged inside the tube body, and the expansion part surrounds the outer parts of the urethral catheterization cavity and the transfusion cavity.

Further, no cross or contact exists among the catheterization cavity, the indwelling cavity, the infusion cavity and the core cavity.

The utility model has the beneficial effects that:

1. through setting up the dabber that cup joints in the inside of catheter for soft catheter has possessed the bulk strength of hard material, has both solved ordinary catheter and to the hardness not enough problem of old urethra blocking patient, does not also have the problem that the metal catheter can't keep somewhere for a long time in the patient.

2. By arranging the threaded part on the surface of the urinary catheter and combining the entering mode of rotary entering, the contact area between the urinary catheter and the urethra of a patient during insertion is reduced, and then the resistance during entering is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of a urinary catheterization cavity according to the present utility model;

FIG. 3 is a schematic cross-sectional view of an indwelling lumen according to the present utility model;

FIG. 4 is a schematic cross-sectional view of an infusion chamber according to the present utility model;

FIG. 5 is a schematic view of the overall structure of the mandrel of the present utility model;

fig. 6 is a schematic structural view of the connection unit of the present utility model.

In the figure, 1, a pipe body; 11. a urinary catheterization cavity; 111. a urinary catheter; 112. a urinary catheter flap; 12. a retention cavity; 121. a retention tube; 122. an expansion section; 13. an infusion chamber; 131. an infusion tube; 132. infusion valve; 14. a core cavity; 15. a threaded portion; 2. a mandrel; 21. a connection unit; 211. a receiving groove; 212. a through hole; 213. placing a block; 214. and a connecting shaft.

Detailed Description

The following detailed description of the embodiments of the present utility model will be made more apparent to those skilled in the art from the following detailed description, in which the utility model is embodied in several, but not all, embodiments of the utility model. The utility model may be embodied or applied in other specific forms and features of the following examples and examples may be combined with each other without conflict, all other examples being contemplated by those of ordinary skill in the art without undue burden from the present disclosure, based on the examples of the utility model.

1-6, the catheter comprises a catheter body 1 and a mandrel 2, wherein the mandrel 2 is sleeved in the catheter body 1, the catheter body 1 comprises a catheter cavity 11, an indwelling cavity 12, an infusion cavity 13 and a core cavity 14, and the catheter cavity 11, the indwelling cavity 12 and the infusion cavity 13 are arranged around the core cavity 14 in an array manner; the mandrel 2 comprises a plurality of connecting units 21, and the connecting units 21 are rotationally connected; with the arrangement, the urinary catheter of the utility model can maintain sufficient strength when being passed into the urethra of a patient with a blocked urinary tract, and can alleviate the problem that the conventional metal urinary catheter cannot be remained in the urinary tract of the patient for a long time.

In some embodiments of the present application, as shown in fig. 3 and 5, a first end of the mandrel 2 is connected to a proximal end of the core cavity 14, and a second end of the mandrel 2 is connected to a distal end of the core cavity 14, so that two ends of the core cavity 14 are supported by the mandrel 2, thereby enhancing the overall strength of the urinary catheter and reducing the resistance to insertion of the urinary catheter into a patient.

In some embodiments of the present application, as shown in fig. 5, each connection unit 21 is not parallel to two rotation planes that can be formed after two adjacent connection units 21 are respectively connected, so that the tube body 1 cannot deflect towards one direction when entering the patient, and the rotation angle between the connection units 21 is not greater than 30 °, so as to prevent the tube body 1 behind from being bent too much when the proximal end of the tube body 1 is subjected to too much resistance, and further damage the urethra of the patient.

In some embodiments of the present application, the material used for the tube body 1 is at least one of latex, plastic, polyvinyl chloride, full silicone or silica gel, and the material used for the connection unit 21 is stainless steel, so that corrosion generated when the urinary catheter is damaged and damage is caused when the urinary catheter enters the patient.

In some embodiments of the present application, as shown in fig. 6, one end of the connection unit 21 is provided with a placement block 213 with a through hole 212, the other side of the connection unit 21 is provided with a receiving groove 211 with a connection shaft 214, the width of the placement block 213 is not greater than the width of the receiving groove 211, and the connection shaft 214 is rotatably connected with the through hole 212, thereby realizing connection of adjacent connection units 21.

In other embodiments of the present application, the mandrel 2 is made of an entire piece of soft metal, and is made of aluminum or aluminum alloy, the soft tube body 1 is wrapped with a metal with higher axial hardness, so that the overall axial hardness of the urinary catheter is improved, and the problem that the urinary catheter is difficult to insert due to low axial hardness and blockage of the urinary catheter of a patient is avoided in the process of inserting the urinary catheter into the urinary catheter of the patient.

In some embodiments of the present application, as shown in fig. 3, the outer surface of the pipe body 1 further comprises a threaded portion 15, the threaded portion 15 comprising at least one thread strip. When the urinary catheter enters the patient, a rotary entering mode is adopted, the threaded strips arranged on the outer surface of the catheter body 1 are matched, and the resistance applied in the rotary entering process is reduced by changing the shape of the contact surface between the urinary catheter and the urethra of the patient. And when the rotation is entered, the torsion between the adjacent connecting units 21 is improved, so the rotation angle between the connecting units 21 is not excessively large, and further the component force for bending the tube body 1 in the pushing process is greatly reduced, and the pushing of the urinary catheter is smoother. The lubricant needs to be smeared on the proximal end before the urinary catheter is inserted into a patient, and the threaded portion 15 is further beneficial to the lubricant on the proximal end of the catheter body 1 to continuously and uniformly move backwards in the screwing process, so that the lubrication effect on the catheter body 1 is improved.

In the embodiment in which the mandrel 2 is made of a whole metal, the mandrel 2 is not suitable for rotating and advancing because of the high overall hardness after being inserted into a patient, so that when the mandrel 2 is made of the whole metal, the threaded portion 15 is changed into a straight-line portion, and the threaded strip is changed into a straight-line strip, so that the insertion mode of non-rotating pushing in the embodiment is more suitable on the basis of not affecting the original pushing auxiliary effect.

In some embodiments of the present application, as shown in fig. 1-4, the end of the tube body 1, which is far away from the patient in use, is a distal end, and the distal end of the tube body 1 is provided with a catheter 111, an indwelling tube 121 and an infusion tube 131, the catheter 111 is in communication with the catheter lumen 11, the indwelling tube 121 is in communication with the indwelling lumen 12, and the infusion tube 131 is in communication with the infusion lumen 13. The urinary catheterization cavity 11, the indwelling cavity 12 and the transfusion cavity 13 are all parallel to the core cavity 14, and the core cavity 14 is parallel to the central axis of the tube body 1 when the tube body 1 is horizontally placed, so that the influence on the bending degree of the tube body 1 when liquid or gas flows in the tube body 1 is reduced. There is no intersection or contact between the urinary catheterization chamber 11, the indwelling chamber 12, the infusion chamber 13 and the core chamber 14.

In some embodiments of the present application, as shown in fig. 2, the proximal end of the catheter body 1 is provided with a urinary flap 112 communicating with the urinary lumen 11, the urinary flap 112 being a one-way flap, the flow of liquid through the urinary flap 112 being from the patient's body to the urinary lumen 11. In use, urine from a patient flows from within the body into the urinary catheter lumen 11 and out of the body through the urinary catheter 111 connected to the urinary catheter lumen 11, preventing backflow of urine or external contamination from entering the patient through the urinary catheter lumen 11.

In some embodiments of the present application, as shown in fig. 4, the proximal end of the tube 1 is provided with an infusion flap 132 in communication with the infusion lumen 13, the infusion flap 132 being a one-way flap, and the flow of fluid through the infusion flap 132 being from the infusion lumen 13 into the patient. In use, the infusion tube 131 is filled with the liquid medicine required by the patient, and the liquid medicine is injected into the patient through the infusion cavity 13 and the infusion flap 132, so that urine of the patient is prevented from flowing out of the body through the infusion cavity 13.

In some embodiments of the present application, as shown in fig. 1, 2, 3, 4, the indwelling lumen 12 is provided with an expansion portion 122 on the side near the proximal end of the tube body 1, the expansion portion 122 is inside the tube body 1 and the expansion portion 122 surrounds the outside of the urinary catheter lumen 11 and the infusion lumen 13. When the proximal end of the urinary catheter reaches the catheterization site, gas is injected into the indwelling lumen 12 through the indwelling catheter 121, so that the inflation portion 122 forms a balloon and inflates within the patient, preventing the urinary catheter from backing out of the patient.

The combined use method of the utility model comprises the following steps:

after the liquid paraffin is smeared on the proximal end of the urinary catheter, the proximal end of the urinary catheter is clamped by a vascular clamp, the urinary catheter is slowly inserted from the urethral orifice of a patient, the urinary catheter is pushed inwards while being rotated along the rotation direction of the screw thread strip on the surface of the catheter body 1 after being inserted by 1cm, when urine flows out of the urinary catheter 111, the urinary catheter is continuously pushed inwards for 2-3cm, the urinary catheter is stopped being pushed, and the indwelling catheter 121 is inflated with gas to expand the air bag, so that the insertion of the urinary catheter is completed.

Claims (10)

1. The catheter is characterized by comprising a catheter body and a mandrel, wherein the mandrel is sleeved in the catheter body, the catheter body comprises a catheterization cavity, an indwelling cavity, an infusion cavity and a core cavity, and the catheterization cavity, the indwelling cavity and the infusion cavity are arranged around the core cavity in an array manner; the mandrel comprises a plurality of connecting units, and the connecting units are rotationally connected.

2. A catheter as in claim 1, wherein a first end of the mandrel is attached to the proximal end of the core lumen and a second end of the mandrel is attached to the distal end of the core lumen.

3. A catheter according to claim 1, wherein each of said connection units is non-parallel to two planes of rotation that can be formed after connection to two adjacent connection units, respectively, such that said catheter body does not deflect in one direction upon entry into a patient.

4. A catheter according to claim 3, wherein the angle of rotation of adjacent two of said connection units is 0 ° -30 °.

5. A catheter as recited in claim 1, wherein said body further comprises a threaded portion, said threaded portion being disposed on an outer surface of said body.

6. A catheter as claimed in claim 1, wherein the end of the body which is remote from the patient in use is a distal end, the distal end of the body being provided with a catheter, an indwelling tube and an infusion tube, the catheter being in communication with the catheterization chamber, the indwelling tube being in communication with the indwelling chamber, the infusion tube being in communication with the infusion chamber.

7. The urinary catheter of claim 6, wherein the proximal end of the catheter body has a valve for communicating with the urinary lumen, the valve being a one-way valve, and the flow of fluid through the valve being from the patient's body to the urinary lumen.

8. The urinary catheter of claim 7, wherein the proximal end of the catheter body has an infusion flap in communication with the infusion lumen, the infusion flap being a one-way flap, and wherein fluid flow through the infusion flap is from the infusion lumen to the patient.

9. A catheter according to claim 8, wherein said indwelling lumen is provided with an expansion portion on a side near the proximal end of said body, said expansion portion being internal to said body and said expansion portion surrounding the exterior of said urinary and infusion lumens.

10. A catheter according to any of claims 6-9, wherein there is no cross-over or contact between the catheterization lumen, the indwelling lumen and the infusion lumen.

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