CN111420230A

CN111420230A - Urethral stricture dilation drainage device

Info

Publication number: CN111420230A
Application number: CN202010194519.3A
Authority: CN
Inventors: 宋玲玲; 张�诚
Original assignee: Affiliated Zhongshan Hospital of Dalian University
Current assignee: Affiliated Zhongshan Hospital of Dalian University
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-07-17

Abstract

The technical field of the manufacturing of medical instruments of urethral stricture dilation drainage devices. Comprises a urethra expansion drainage tube, a supporting tube and a guide wire; in the urethra dilatation drainage tube, a flow passage 10, a channel 12, a channel 17 and a connector 18 are communicated in sequence, an air bag 8, a channel 9, a channel 11, a channel 16 and a connector 21 are communicated in sequence, and an air bag 14, a channel 13, a channel 15 and a connector 19 are communicated in sequence; the supporting tube is a single-channel tube and is arranged in the drainage tube, the tail part of the supporting tube is connected with a screw cap and is screwed on a connector 18 at the tail part of the channel 17; the guide wire body part is rigid, and the head end is made of soft materials. The invention has the advantages of preventing the drainage tube from falling off, being easy to pass through stricture, being simpler to operate and not causing the secondary stricture caused by the tearing of the urethral mucosa and the scar repair.

Description

Urethral stricture dilation drainage device

Technical Field

The invention belongs to the technical field of medical appliance manufacturing. Relates to a urethral stricture dilation drainage device.

Background

The urinary catheter is a common clinical medical instrument, is placed into the bladder through the external orifice of the urethra to drain urine to the outside of the body, has the main functions of accurately recording urine volume, facilitating drainage, flushing and the like, and plays an important role in clinic.

The catheter applied at present is mainly made of silica gel, rubber, EVA, PVC and the like, and the catheter body is softer. For patients with symptoms such as urethral stricture, prostatic hyperplasia, prostatitis, prostate tumor, and urethral injury, the internal diameter, the running and the bending degree of the urethra change. The conventional urethral catheterization in-process resistance is great, needs to use great strength, and violence intubate not only brings huge misery for the patient, causes secondary urethra damage even easily, such as false way, hemorrhage, perforation etc. and then has aggravated the severity of urethra disease, has influenced the healing of urethra, leads to the urethra damage and the stenosis of complexity even, has seriously influenced patient's quality of life. For the patients outlined above, in order to increase the success rate of indwelling catheters and reduce the incidence of complications, a drainage catheter may be placed under the guidance of a guidewire. The prior catheter mostly adopts a tube body with a closed front end and an open back end, wherein a side opening is communicated with a catheter cavity, when the guide wire is put in, the guide wire is led out from the side opening of the catheter through the tube cavity, and the head end of the urinary catheter is not parallel to the guide wire, thus leading to difficult guide and failure of indwelling urinary catheter.

Even if the catheter can be placed into a small-sized urinary catheter, the drainage effect is poor, and the urinary retention is easy to occur again after the catheter is pulled out. In order to keep the spontaneous urination smooth, urethral dilation is often required for the above-mentioned patients. The conventional method adopted at present is to expand the urethra by a metal urethra dilator, multiple urethra dilations from small size to large size are mostly adopted, and then a thick ureter is inserted for supporting for a long time so as to promote the healing of injured mucous membrane.

Disclosure of Invention

The invention aims to provide a urethral stricture dilation drainage device which can prevent a drainage tube from falling off, is easy to pass stricture, is simpler to operate and can not cause the secondary stricture caused by urethral mucosa tearing and scar repair.

The invention comprises a urethra dilatation drainage tube 1, a supporting tube 2 and a guide wire 3; the urethra dilatation drainage tube 1 consists of a head part 4, a body part 5 and a tail part 6, wherein the outer wall of the front end of the head part 4 in a cone shape is provided with a side hole 7, the tube wall is provided with a spherical air bag 8 membrane which is in a membrane shape when not expanded, the two ends of the air bag 8 are fixed on the tube wall, and an air bag channel 9 and a urine drainage channel 10 are arranged in the air bag 8; the body part 5 is a double-pass tube, a channel 11, a channel 12 and a channel 13 are arranged in the body part, the channel 11 is communicated with the channel 9, the channel 12 is communicated with the channel 10, a cylindrical air bag 14 is arranged on the tube wall, two ends of the air bag 14 are fixed on the tube wall, and the channel 13 is communicated with the air bag 14; a channel 15, a channel 16 and a channel 17 are arranged in the tail part 6, wherein the channel 17 is communicated with the channel 12, the channel 17 is communicated with a urine bag connector 18 arranged at the tail end of the tail part 6, the channel 16 is communicated with the body part channel 11, the channel 16 is communicated with a water injection connector 21 arranged at the tail end of the tail part 6, the channel 15 is communicated with the channel 13, and the channel 15 is communicated with a water injection connector 19 arranged at the tail end of the tail part 6; the support tube 2 is a single-channel tube and is arranged in the drainage tube 1, the tail part of the support tube 2 is connected with a screw cap 20, and the screw cap 20 is screwed on a connector 18 at the tail part of the channel 17;

the internal thread of the screw cap 20 connected with the tail part of the supporting tube 2 is matched and connected with the external thread of the connector 18 at the tail end 6 of the urethra dilating tube 1, and the screw cap 20 is screwed on the connector 18;

the diameter of the drainage tube 1 is 8-12Fr, and the length is 40 cm;

the front end air bag 8 is expanded to have the diameter of 2-4 cm;

the cylindrical air sac 14 expands to the circumference of 20-28 Fr;

the cylindrical balloon 14 has expanded circumferential diameters of 20Fr, 22Fr, 24Fr, 26Fr and 28 Fr;

the outer diameter of the support tube 2 is 6-10Fr, the inner diameter is 5-9Fr, and the length is 40 cm;

the body part of the guide wire 3 is rigid, the head end is made of soft materials, the length is 100cm, and the diameter is 0.5-1 mm;

2 side holes 7 are arranged on the conical outer wall at the front end of the head 4 of the drainage tube 1;

two ends of the air bag 8 are fixed on the pipe wall by metal rings, and two ends of the air bag 14 are fixed on the pipe wall by metal rings;

the side wall of the head of the support tube 2 is provided with a resistance block 22,

the head end of the supporting tube 2 is a metal tube.

The invention has the advantages that:

1. the device can be placed into the urethra under the guidance of the guide wire, the operation is simpler, and the secondary injury of the urethra can not be caused;

2. the hardness of the device is higher than that of a conventional ureter, the diameter of the device is thin, the head end of the device is conical, a supporting tube is arranged in the device, and the device is easy to pass through a narrow part;

3. the head end of the device is provided with the method saccule which can prevent the drainage tube from falling off;

4. the device is provided with the expansion saccule, can perform urethral expansion while draining urine, and is simple to operate;

5. the urethral dilator can perform urethral dilation step by step, gradually increases pressure to the maximum dilation diameter, has little pain, and can not cause the secondary stenosis caused by urethral mucosa tearing and scar repair.

Drawings

FIG. 1 is a schematic view of the draft tube construction of the present invention,

figure 2 is a schematic view of the support tube structure of the present invention,

figure 3 is a schematic view of the assembled structure of the present invention,

FIG. 4 is a schematic structural diagram of the present invention after being placed in a designated position,

figure 5 is a schematic view of the device showing the structure of the inflated head balloon,

figure 6 is a schematic view of the present device showing the structure of the inflated body balloon,

the drainage tube comprises a drainage tube 1, a support tube 2, a guide wire 3, a head 4, a body 5, a tail 6, a side hole 7, an air bag 8, a channel 9, a channel 10, a channel 11, a channel 12, a channel 13, a channel 14, an air bag 15, a channel 16, a channel 17, a channel 18, a connector 19, a connector 20, a screw cap 21, a connector 22, a resistance block 23, a pressure pump A, a section and a section B.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The invention comprises a urethra dilatation drainage tube 1, a supporting tube 2 and a guide wire 3; the urethra dilatation drainage tube 1 consists of a head part 4, a body part 5 and a tail part 6, the diameter of the drainage tube 1 is 8Fr, the length of the drainage tube is 40cm, wherein, the outer wall of the front end of the head part 4 in a taper shape is provided with 2 side holes 7, the tube wall is provided with a spherical air bag 8 membrane, the diameter of the front end air bag 8 is expanded by 3cm, the two ends of the air bag 8 are fixed on the tube wall by metal rings, and an air bag channel 9 and a urine drainage channel 10; the body part 5 is a two-way pipe, a channel 11, a channel 12 and a channel 13 are arranged in the two-way pipe, the channel 11 is communicated with the channel 9, the channel 12 is communicated with the channel 10, a cylindrical air bag 14 is arranged on the pipe wall, the expansion circumference type of the cylindrical air bag 14 is 22Fr, two ends of the air bag 14 are fixed on the pipe wall by metal rings, and the channel 13 is communicated with the air bag 14; a channel 15, a channel 16 and a channel 17 are arranged in the tail part 6, wherein the channel 17 is communicated with the channel 12, the channel 17 is communicated with a urine bag connector 18 arranged at the tail end of the tail part 6, the channel 16 is communicated with the body part channel 11, the channel 16 is communicated with a water injection connector 21 arranged at the tail end of the tail part 6, the channel 15 is communicated with the channel 13, and the channel 15 is communicated with a water injection connector 19 arranged at the tail end of the tail part 6; the supporting tube 2 is a single-channel tube, the outer diameter is 6Fr, the inner diameter is 5Fr, the length is 40cm, the head end is a metal tube, the side wall of the head part of the supporting tube 2 is provided with a resistance block 22 which is arranged in the drainage tube 1, the internal thread of the tail part of the supporting tube 2 connected with the screw cap 20 is matched and connected with the external thread of the connector 18 at the tail end 6 of the urethra dilating tube 1, and the screw cap 20 is screwed on the connector 18; the body part of the guide wire 3 is rigid, the head end is made of soft materials, the length is 100cm, and the diameter is 0.9 mm.

In clinical operation, for appointing the position needing to expand the stenosis between A section and B section, put into the bladder through the external orifice of urethra with seal wire 3 first, put into the bladder urethra expansion drainage tube 1 equipped with support tube 2 under the guide of seal wire 3, through gasbag 8 water injection joint 21, pour into the sufficient fixed globular gasbag 8 of head end of salt solution into, withdraw from support tube 2 and seal wire 3, expand cylindricality gasbag 14 joint 19 and connect the force pump 23, pour into the sufficient expansion gasbag 14 of salt solution gradually, increase pressure slowly, expand the stenosis step by step, drainage tube afterbody connector 18 connects the urine bag drainage urine.

Claims

1. The urethral stricture dilation drainage device is characterized by comprising a urethral dilation drainage tube (1), a support tube (2) and a guide wire (3); the urethra dilatation drainage tube (1) consists of a head part (4), a body part (5) and a tail part (6), wherein the conical outer wall of the front end of the head part (4) is provided with a side hole (7), the tube wall is provided with a spherical air bag (8) membrane, the two ends of the air bag (8) are fixed on the tube wall, and an air bag channel (9) and a urine drainage channel (10) are arranged in the air bag membrane; the body part (5) is a double-pass pipe, a channel (11), a channel (12) and a channel (13) are arranged in the double-pass pipe, the channel (11) is communicated with the channel (9), the channel (12) is communicated with the channel (10), a cylindrical air bag (14) is arranged on the pipe wall, two ends of the air bag (14) are fixed on the pipe wall, and the channel (13) is communicated with the air bag (14); a channel (15), a channel (16) and a channel (17) are arranged in the tail part (6), wherein the channel (17) is communicated with the channel (12), the channel (17) is communicated with a urine bag connector (18) arranged at the tail end of the tail part (6), the channel (16) is communicated with the body part channel (11), the channel (16) is communicated with a water injection connector (21) arranged at the tail end of the tail part (6), the channel (15) is communicated with the channel (13), and the channel (15) is communicated with a water injection connector (19) arranged at the tail end of the tail part (6); the supporting tube (2) is a single-channel tube and is arranged in the drainage tube (1), the tail part of the supporting tube (2) is connected with a screw cap (20), and the screw cap (20) is screwed on a connector (18) at the tail part of the channel (17).

2. The urethral stricture dilation drainage device as set forth in claim 1, wherein the internal thread of the screw cap (20) connected to the tail of the support tube (2) is engaged with the external thread of the connector (18) at the end of the tail (6) of the urethral dilation tube (1), and the screw cap (20) is screwed on the connector (18).

3. The urethral stricture dilation drainage device according to claim 1, wherein the drainage tube (1) has a tube diameter of 8-12Fr and a length of 40 cm.

4. The urethral stricture dilation drainage device according to claim 1, wherein the front balloon (8) dilates 2-4cm in diameter.

5. The urethral stricture dilation drainage device as set forth in claim 1, wherein the dilation balloon (14) has a dilation circumference of 20-28 Fr.

6. The urethral stricture dilation drainage device as set forth in claim 1, wherein the support tube (2) has an outer diameter of 6-10Fr, an inner diameter of 5-9Fr and a length of 40 cm.

7. The urethral stricture dilation drainage device according to claim 1, wherein the guide wire (3) has a rigid body and a soft tip with a length of 100cm and a diameter of 0.5-1 mm.

8. The urethral stricture dilation drainage device according to claim 1, wherein the tapered outer wall of the front end of the head (4) of the drainage tube (1) is provided with 2 side holes (7).

9. The urethral stricture dilation drainage device as set forth in claim 1, wherein the balloon (8) is fixed at both ends thereof to the wall of the vessel by metal rings, and the balloon (14) is fixed at both ends thereof to the wall of the vessel by metal rings.

10. The urethral stricture dilation drainage device according to claim 1, wherein the head end of the support tube (2) is a metal tube.