CN106110472B

CN106110472B - Exchangeable catheter for men and catheter replacement method

Info

Publication number: CN106110472B
Application number: CN201610672238.8A
Authority: CN
Inventors: 李约延; 夏勇; 夏妍; 沈莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2022-09-23
Anticipated expiration: 2036-08-12
Also published as: CN106110472A

Abstract

The invention discloses an exchangeable catheter for men and a catheter replacement method, and belongs to the technical field of medical instruments. The invention comprises four main characteristics of gradual transition from thin to thick of the external diameter of the head end to the tail end of the catheter, a side deflection air bag, a guiding side hole and a hard guiding guide wire with a soft head and a hard tail, and solves the problems in the prior art in the background technology. The urethral catheterization device solves the urethral injury problem caused by reinserting the urethral catheter and improves the working efficiency.

Description

Exchangeable catheter for men and catheter replacement method

Technical Field

The invention relates to a catheter, and belongs to the technical field of medical instruments.

Background

The existing indwelling catheter is a common basic skill operation in clinical work. At present, the Frey's catheter widely used in clinic is a two-cavity or three-cavity balloon catheter which is made of silica gel material and has uniform outer diameter of 4-8 mm, the two-cavity catheter consists of an annular balloon, an inflation tube hole and a catheter hole, and the existing problems are that:

1. the annular air bag is communicated with the vent pipe on the inner wall of the catheter, liquid or gas is injected into the annular air bag through the vent pipe, and the annular air bag expands to pass through a urethral orifice far away so that the catheter is fixed in the bladder and is not easy to drop; the three-cavity structure is additionally provided with a flushing pipe hole inside the catheter, one end of the flushing pipe is communicated with the end part of the catheter, and the bladder can be flushed. A catheter is selected according to the age and the condition of a patient, and a thinner catheter is selected for the initial indwelling catheterization, particularly for a heart disease patient, so that the resistance of intubation is reduced, and accidents such as sudden death and the like are avoided; patients with prostatic hyperplasia can only select a small size catheter. A slightly thicker catheter is suitable for patients lying in bed for a long time or the elderly, because the perineum muscles of the patients have poor elasticity and the urethral sphincter is looser and has poor contractility. Confusion in selecting catheters with uniform outer diameter: the catheter with small size and thin tube cavity is easy to operate and cause urine overflow, so that the infection probability of the bacteria at the urethral opening through the extra-cavity route is increased; the catheter with large size and thick tube cavity can prevent urine from overflowing, but is not easy to operate and can cause pain to patients.

2. The thin-head end catheter is difficult to pass through the prostatic urethra in the process of placement, and the judgment of whether the catheter passes through the urethral stricture part and is inserted into the urethral depth is highly dependent on the visual observation, feeling and experience of an operator, and the blindness, failure rate and complications of intubation are high. A stiffened guide wire section specially equipped is inserted into the urination cavity of the catheter to increase the hardness and the supporting effect of the catheter and obviously promote the passing property of the catheter. The male urethra is about 16-22 cm long, the average diameter of the pipe is 5-7 mm, and the male urethra has the anatomical characteristics that: three parts of the prostate part, the bulbourethral urethra and the navicular urethra are enlarged, two physiological curvatures of the inferior pubic curvature and the anterior pubic curvature are formed, and three narrow parts of the internal urethral orifice, the membranous part and the external urethral orifice are formed; the urinary catheter is sometimes difficult or unsuccessful to place in a male patient due to the complex structure of the male urethra.

3. The annular air sac with the air sac indwelling catheter playing a fixing role has the defect that the continuous compression of the mucous membrane of the neck of the bladder can cause ischemic necrosis, calcium salt deposition on the wall of the air sac indwelling catheter for a long time is easy to form a stone ball with the air sac as the center, and once the stone ball is formed, the operation treatment is needed.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides an exchangeable catheter for men and a catheter replacing method, which solve the problem of urethral injury caused by reinsertion of the catheter and improve the working efficiency.

The invention is realized by the following technical scheme: an exchangeable catheter for men comprises a catheter main body, wherein the catheter main body is a flexible pipe body with a drainage channel inside, the front end of the catheter main body is a closed pipe head, the tail end of the catheter main body is a drainage interface, a drainage side hole is formed in the side wall of the catheter main body close to the closed pipe head, a lateral airbag is arranged on the side wall of the catheter main body behind the drainage side hole, a vent pipe for controlling the lateral airbag to expand or compress is arranged in the catheter main body, the vent pipe is isolated from the drainage channel, an inflation hole communicated with the lateral airbag is formed in the front end of the vent pipe, the tail end of the vent pipe is an inflation interface, and an airbag position mark is arranged at the tail end of the catheter main body; an exchange guide wire channel is arranged on one side, opposite to the side airbag, in the catheter body and is isolated from the drainage channel, a guide wire front guide hole is formed in the side wall of the catheter body, located in the front of the exchange guide wire channel, the tail end of the exchange guide wire channel is provided with a guide wire rear guide hole, an exchange guide wire can completely penetrate through the exchange guide wire channel, and the exchange guide wire is made of flexible materials.

The external diameter of the catheter main body is gradually increased from the front end to the tail end, and the whole catheter main body is conical.

The medium filled in the vent pipe and used for controlling the expansion or compression of the offset side air bag is gas or liquid.

The rear end of the exchange guide wire channel is provided with an inclined tube, and the inclination of the inclined tube can ensure that the exchange guide wire is smoothly guided in.

The front section of the exchange guide wire extends into the exchange guide wire channel to serve as an exchange guide wire, and the rear section of the exchange guide wire bends and extends into the drainage channel to serve as a boosting guide wire.

The method for replacing the catheter by adopting the exchangeable urinary catheter for men comprises the steps of firstly, penetrating the front end of the exchangeable guide wire into the urinary catheter through the exchange guide wire channel from the guide wire rear guide hole and penetrating out of the guide wire front guide hole to be sent into a urinary bladder to form a track, then taking out the urinary catheter to be replaced, still taking the exchanged guide wire as the track for the newly replaced urinary catheter, forming a guide track by penetrating the tail end of the exchangeable guide wire into the guide wire front guide hole of the new urinary catheter and penetrating out of the guide wire rear guide hole to form a guide track, and then putting the boosting guide wire into the drainage channel to realize the smooth replacement of the new urinary catheter.

The invention has the beneficial effects that:

the invention comprises four main characteristics of gradual transition from thin to thick of the external diameter of the head end to the tail end of the catheter, a side deflection air bag, a guiding side hole and a hard guiding guide wire with a soft head and a hard tail, and solves the problems in the prior art in the background technology.

1. The thinner end of the catheter can reduce the resistance of the catheter inserted into the urethra, is easy to operate, and simultaneously reduces the possibility of damaging the mucous membrane of the urethra and relieves the pain of a patient; a boosting guide wire section is inserted into the cavity to increase the hardness and the supporting effect of the catheter, and the head end of the catheter is designed into a blind end to prevent the guide wire from sliding out to damage the urethra;

2. the gradual thickening of the external diameter of the tail end of the catheter body is beneficial to flexibly expanding the urethra and can increase the sealing degree of the outer wall of the catheter and the urethra to prevent urine overflow and urine leakage. In order to overcome the defect that the annular air bag with a fixing function in the air bag indwelling catheter continuously presses the mucous membrane of the bladder neck to possibly cause ischemic necrosis, a side air bag is designed 25-35 mm away from the head end of the catheter, a side air bag position mark is arranged at the tail end of the catheter, and the side air bag does not press the mucous membrane of the bladder neck at the same part for a long time by rotating the catheter in vitro regularly.

3. A side hole communicated with the tail end of the catheter is designed on the opposite side of the catheter side air bag, the side hole is equivalent to a flushing pipe in a three-cavity air bag indwelling catheter, besides the flushing or local medicine injection surface anesthesia or other treatment effects, a guide wire soft head is arranged as an exchange guide wire and is sent into a bladder from the outside through the side hole, the exchange guide wire is kept and fixed as a track, the old catheter is withdrawn and needs to be replaced, and then a new catheter is sent along the exchange guide wire to realize the smooth exchange of the catheter, so that the urethral injury problem of reinserting the catheter is solved, and the working efficiency is improved. The novel catheter has remarkable popularization and application values.

Drawings

The invention is further illustrated below with reference to the figures and examples.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 1;

FIG. 4 is a cross-sectional view C-C of FIG. 1;

FIG. 5 is a view in the direction D of FIG. 1;

FIG. 6 is a reference view of the present invention in use, the push wire and the exchange wire being two wires;

FIG. 7 is a reference view of the present invention in use, the push wire and the exchange wire being the same wire;

in the drawing, 1, a catheter body, 2, an exchange guide wire channel, 2-1, an inclined tube, 3, a guide wire front guide hole, 4, a drainage side hole, 5, a closed tube head, 6, a drainage channel, 7, a side air bag, 8, an inflation hole, 9, an air pipe, 10, an inflation interface, 11, a drainage interface, 12, a guide wire rear guide hole, 13, an air bag position mark, 14, a boosting guide wire, 15 and an exchange guide wire.

Detailed Description

The present invention will be further described with reference to the following examples.

The exchangeable male catheter shown in the attached drawings 1-5 comprises a catheter body 1, wherein the catheter body 1 is a flexible pipe body with a drainage channel 6 inside, the front end of the catheter body 1 is a closed tube head 5, the tail end of the catheter body 1 is a drainage interface 11, a drainage side hole 4 is formed in the side wall of the catheter body 1 close to the closed tube head 5, a lateral air bag 7 is arranged on the side wall of the catheter body 1 behind the drainage side hole 4, a vent pipe 9 for controlling the lateral air bag 7 to expand or compress is arranged in the catheter body 1, the vent pipe 9 is isolated from the drainage channel 6, an inflation hole 8 communicated with the lateral air bag 7 is arranged at the front end of the vent pipe 9, an inflation interface 10 is arranged at the tail end of the vent pipe 9, and an air bag position mark 13 is arranged at the tail end of the catheter body 1; an exchange guide wire channel 2 is arranged on one side, opposite to the side airbag 7, in the urinary catheter main body 1, the exchange guide wire channel 2 is isolated from the drainage channel 6, a guide wire front guide hole 3 is formed in the side wall of the urinary catheter main body 1, which is positioned in front of the exchange guide wire channel 2, a guide wire rear guide hole 12 is formed in the tail end of the exchange guide wire channel 2, an exchange guide wire 15 can completely penetrate through the exchange guide wire channel 2, and the exchange guide wire 15 is a guide wire with a flexible material at the front end.

The outer diameter of the catheter body 1 is gradually increased from the front end to the tail end, and the whole body is conical.

The medium filled in the vent pipe 9 for controlling the expansion or compression of the offset air bag 7 is gas or liquid. Such as gas or saline. A one-way valve is arranged at the inflation interface 10 of the vent pipe 9.

The rear end of the exchange guide wire channel 2 is provided with an inclined tube 2-1, and the inclination of the inclined tube 2-1 can ensure that the exchange guide wire 15 is smoothly guided in.

The front section of the exchange guide wire 15 extends into the exchange guide wire channel 2 to serve as an exchange guide wire, and the rear section of the exchange guide wire 15 bends and then extends into the drainage channel 6 to serve as a boosting guide wire 14.

As shown in figure 6, the method for replacing the urinary catheter by the exchangeable urinary catheter for men comprises the steps of firstly passing the front end of the exchangeable guide wire 15 through the exchangeable guide wire channel 2, penetrating the front end of the exchangeable guide wire 15 into the rear guide wire leading hole 12, penetrating the front guide wire leading hole 3 out of the front guide wire leading hole 3, and feeding the exchangeable guide wire into a bladder to form a track, then taking out the urinary catheter to be replaced, taking the exchanged urinary catheter out, using the exchangeable guide wire 15 as the track, and forming the guide track by penetrating the tail end of the exchangeable guide wire 15 into the front guide wire leading hole 3 of the new urinary catheter and penetrating the rear guide wire leading hole 12 of the new urinary catheter to form a guide track, then putting the boosting guide wire 14 into the drainage channel 6, and smoothly replacing the new urinary catheter.

As shown in fig. 7, the exchange guide wire 15 and the boosting guide wire 14 are the same guide wire, the front section of the exchange guide wire 15 extends into the exchange guide wire channel 2 to serve as the exchange guide wire, and the rear section of the exchange guide wire 15 bends and extends into the drainage channel 6 to serve as the boosting guide wire 14.

The specific implementation process and advantages of the invention are as follows:

1. the catheter is designed to have the characteristic that the external diameter of the catheter gradually changes from thin to thick from the head end to the tail end, which is beneficial to solving the defect of the catheter with uniform external diameter, the catheter with the thin head end can reduce the resistance of the urethra and smoothly insert the catheter, the operation is simplified, the possibility of damaging the mucous membrane of the urethra is reduced, the pain of a patient is relieved, the external diameter of the tail end of the catheter body gradually becomes thick, which is beneficial to flexibly expanding the urethra and can increase the sealing degree of the outer wall of the catheter and the urethra to prevent the overflow or the leakage of urine.

2. Aiming at the problem that the urinary catheter with a thin head end is difficult to pass through a prostatic urethra part in the process of being placed into the urinary catheter, a specially-equipped stiffened guide wire section is inserted into a urinary cavity of the urinary catheter to increase the hardness and the supporting effect of the urinary catheter, the passing performance of the urinary catheter is obviously boosted, and the head end of the urinary catheter is designed into a blind end which can prevent a guide wire from sliding out to damage the urethra. A side hole communicated with the tail end of the catheter is designed on the opposite side of a side airbag of the catheter, which is equivalent to a flushing pipe in a three-cavity airbag indwelling catheter, besides the flushing or local injection surface anesthesia or other treatment effects, a guide wire soft head is arranged and used as an exchange guide wire to be sent into a bladder from the outside of a human body through the side hole, the exchange guide wire is kept and fixed as a track, the old catheter is removed and needs to be replaced, and then a new catheter is sent along the exchange guide wire, so that the smooth exchange of the catheter can be realized, the problem of urethral injury caused by reinsertion of the catheter is solved, and the working efficiency can be obviously improved.

3. The problem that the annular air bag which plays a role in fixing the air bag indwelling catheter has the defect that ischemia necrosis is possibly caused by continuous compression of the mucous membrane of the neck of the bladder and the like is solved; according to the invention, the side airbag is designed 25-35 cm away from the head end of the catheter, 10-15 ml of physiological saline is injected into the airbag until the airbag expands to play a fixing role, the tail end of the catheter is provided with the side airbag position mark, the catheter is rotated in vitro at regular time, so that the side airbag does not press tissues at the same part for a long time to avoid ischemic necrosis, and the side airbag is also helpful for thoroughly draining urine without residual urine.

Compared with the existing three-cavity air bag indwelling catheter technology, the external diameter of the catheter from the head end to the tail end is gradually transited from thin to thick, so that the catheter is easy to insert, the urethra is flexibly expanded, and urine is prevented from overflowing; the side air bag design stops continuous compression of a bladder neck mucous membrane by regularly rotating the catheter in vitro; the flushing pipe in the three-cavity air bag indwelling catheter is changed into a side hole, so that the flushing or local medicine injection function is realized, and besides, the exchange guide wire can be sent into the bladder from the outside of the body through the side hole, and the smooth exchange of the catheter without damage is realized. The novel catheter has remarkable popularization and application values.

Claims

1. The utility model provides a male exchangeable catheter, includes catheter main part (1), and catheter main part (1) is the inside flexible pipe body that has drainage channel (6), and the front end of catheter main part (1) is closed tube head (5), and the tail end of catheter main part (1) is drainage interface (11), is close to it has drainage side opening (4), its characterized in that to make on the lateral wall of the catheter main part (1) of closed tube head (5): the lateral walls of two sides of the catheter main body (1) are respectively provided with one drainage side hole (4), the drainage side holes (4) of the two sides are arranged in a staggered mode, the lateral wall of the catheter main body (1) behind the drainage side holes (4) is provided with a lateral air bag (7), a vent pipe (9) for controlling the expansion or compression of the lateral air bag (7) is arranged in the catheter main body (1), the vent pipe (9) is isolated from the drainage channel (6), the front end of the vent pipe (9) is provided with an inflation hole (8) communicated with the lateral air bag (7), the tail end of the vent pipe (9) is provided with an inflation connector (10), and the tail end of the catheter main body (1) is provided with an air bag position mark (13);

an exchange guide wire channel (2) is arranged on one side, opposite to the side airbag (7), in the catheter body (1), the exchange guide wire channel (2) is isolated from the drainage channel (6), a guide wire front guide hole (3) is formed in the side wall of the catheter body (1) positioned in front of the exchange guide wire channel (2), a guide wire rear guide hole (12) is formed in the tail end of the exchange guide wire channel (2), an exchange guide wire (15) can completely penetrate through the exchange guide wire channel (2), and the exchange guide wire (15) is a guide wire with a flexible material at the front end;

the exchange guide wire (15) and the boosting guide wire (14) are provided with guide wires by the same piece, the front section of the provided guide wire extends into the exchange guide wire channel (2) to be used as the exchange guide wire (15), the rear section of the provided guide wire is provided with a hardened guide wire section, and the hardened guide wire section extends into the drainage channel (6) to be used as the boosting guide wire (14) after being bent;

through the exchange guide wire channel (2), the front end of the exchange guide wire (15) penetrates through the guide wire rear guide hole (12) and penetrates out of the guide wire front guide hole (3) to be sent into the bladder to form a track, then the catheter to be replaced is taken out, the newly replaced catheter still takes the exchange guide wire (15) as the track, and contrary to the old catheter, the tail end of the exchange guide wire (15) penetrates through the guide wire front guide hole (3) of the new catheter and penetrates out of the guide wire rear guide hole (12) to form a guide track, then the boosting guide wire (14) is placed into the drainage channel (6), and the new catheter is smoothly replaced.

2. The male exchangeable urinary catheter according to claim 1, characterized in that: the external diameter of the catheter body (1) is gradually increased from the front end to the tail end, and the whole catheter body is conical.

3. The male exchangeable urinary catheter according to claim 1, characterized in that: the medium which is filled in the vent pipe (9) and controls the expansion or compression of the offset air bag (7) is gas or liquid.

4. The male exchangeable urinary catheter according to claim 1, characterized in that: the rear end of the exchange guide wire channel (2) is provided with an inclined tube (2-1), and the inclination of the inclined tube (2-1) can ensure that the exchange guide wire (15) can be smoothly guided in.