CN107050629A - A kind of urethral dilatation drainage system and application method - Google Patents

Abstract

The invention discloses a urethral dilatation and drainage device and a usage method thereof. The urethral dilation and drainage device includes a urethral dilation catheter, an inner sheath, a guide wire and a pressure measuring device; the urethra dilation catheter includes a tube head, a tube body and a tube tail, A guide hole is set in the middle of the tube head, side holes are set on the side of the tube body, and the tube body below the side holes is covered with two air bags, and the inner sheath is a hollow curved plastic structure with a Guide wire hole; on the one hand, the present invention can be used as an ordinary urinary catheter; on the other hand, for patients with bladder neck contracture and stenosis after undergoing prostate or bladder neck surgery, it can be smoothly and precisely guided by the guide wire and supported by the hollow inner sheath. It passes through the contracted and narrow bladder neck, and after being inserted into the bladder neck, it can accurately expand the narrow area through pressure, prevent the expanded contracture scar from shrinking and recurring, reduce the pain of the patient, and make the treatment more convenient for the patient.

Description

Urethral expansion and drainage device and method of use

technical field

The invention relates to the field of medical devices, in particular to a urethral dilatation and drainage device and a usage method.

Background technique

Benign prostatic hyperplasia (BPH) is the most common disease among elderly men, and about 30% of patients need transurethral resection of the prostate. Bladder neck contracture is one of the common complications after resection of the prostate. Often this kind of contracture narrowing will appear "pinhole-like" changes, and the bladder neck is contracted and narrowed into a pinhole-like gap. Generally, metal dilators can be used for clinical expansion. If there is a little carelessness, a "false tract" will appear, and even the rectum will be damaged, resulting in serious consequences. Even if the metal dilator is successfully dilated, when the urinary catheter is inserted because of the hard texture of the stenotic scar, the urinary catheter often folds, bends, and cannot pass through the stenosis smoothly. The end lumen is thinner, and the expansion effect is limited, only limited to the range of its lumen diameter.

Contents of the invention

The object of the present invention is to provide a urethral dilatation and drainage device and its usage method, which are used to solve common bladder neck contracture and stenosis after resection of prostate. The present invention can measure the pressure and adjust the dilation, and guide through the built-in guide wire, it can effectively guide through the pinhole-like narrow contracture part of the bladder neck, and with the help of the built-in curved inner sheath, the catheter can break through the resistance of the narrow part and insert into the bladder Inside, the pressure-adjustable external handle expands the columnar balloon at the front end of the catheter, so as to achieve the purpose of precisely dilating the stenosis.

The technical scheme that the present invention solves its technical problem to take is:

A urethral dilatation and drainage device, comprising a urethral drainage dilation catheter, an inner sheath, a guide wire and a pressure measuring device; the urethral drainage dilation catheter includes a tube head, a tube body and a tube tail, and a guide hole is provided in the middle of the tube head, The tube body is provided with a drainage hole near the tube head, the tube body below the drainage hole is coated with a first air bag and a second air bag, and the inner wall of the tube is provided with a first inflation channel and a second inflation channel The tail of the tube includes a urine outlet tube, a first air bag tube and a second air bag tube, the bottom end of the first air bag tube is provided with a conduction valve, and the first air bag tube communicates with the first air bag through the first inflation channel , the second airbag tube communicates with the second airbag through the second inflatable channel; the top of the inner sheath is provided with a guide wire hole; the guide wire is a steel wire with a soft front end and a harder rear end, and the guide wire is placed in the inner sheath , the front end of the guide wire passes through the guide wire hole at the top of the inner sheath;

The second airbag is cylindrical after being inflated;

The tube head is provided with an injection hole, the side wall of the tube body is provided with an injection channel, and the tube tail is provided with an injection tube, and the injection tube communicates with the injection hole through the injection channel;

The surface of the guide wire is provided with a PTFE coating;

The inner sheath is a hollow cylindrical shape with a radian, the tail end of the inner sheath is open, and the diameter of the inner sheath is smaller than the inner diameter of the urethral drainage dilation catheter tube;

The second airbag tube is provided with a pressure measuring device. The pressure measuring device includes a connector, a closed lumen and a pressure gauge. Threads are provided, and a screw push rod is provided in the closed lumen, and the screw push rod includes a piston head, a push rod and a rod head, and the piston head cooperates with the thread;

A method for using a urethral dilation and drainage device, comprising the following steps:

1) Insert the curved hollow inner sheath into the urethral drainage dilation catheter first, insert the guide wire, and lead out the front end of the guide wire from the guide hole of the urethral drainage dilation catheter tube head;

2) Hold the tail of the urethral drainage dilation catheter and insert it into the urethra. When it reaches the position of the bladder neck, continuously insert and adjust the guide wire to find the contracture and narrow bladder neck;

3) After the guide wire is successfully inserted, firmly hold the catheter and the inner sheath, and insert it into the bladder according to the physiological curvature of the male urethra until urine flows out;

4) Pull out the guide wire after seeing the urine flow out, pull out the inner sheath, inflate the first balloon by 15ml, pull the urethral drainage dilation catheter, and fix it at the neck of the bladder through the first balloon;

5) After fixing it in place, insert the urethral drainage dilation catheter 1 cm into the bladder so that the second balloon is located at the neck of the bladder, and then connect the connector of the pressure measuring device to the tube of the second balloon, rotate the rod head, and move toward the second balloon. Inject air into the air, observe the pressure change of the pressure gauge, and stop pressurizing when the pressure gauge shows 10ATM;

6) After 10 minutes, reversely rotate the rod head until the pressure on the pressure gauge returns to zero, then pull the urethral drainage dilation catheter to reset it and continue to drain urine;

7) For the common bladder neck contracture and stenosis after resection of the prostate, dilate the urethra twice a day.

The beneficial effects of the present invention are:

1. On the one hand, it can be used as an ordinary urinary catheter, on the other hand, it can pass through the contracted and narrow bladder neck smoothly and accurately under the guidance of the guide wire and the support of the hollow inner sheath, and can be accurately expanded by pressure after being inserted into the bladder neck Stenosis, to prevent the expansion of contracture scar retraction recurrence.

2. The guide wire is safe and reliable, and will not cause false tracts and damage the rectum, making it safer to use.

3. The support of the hollow inner sheath is more convenient to pass through the narrow part of the obstruction, and there will be no situation that the urinary catheter cannot be inserted due to pleating, and it is more convenient to use.

4. Accurate air bag expansion is performed through the device that can adjust the detection pressure, which will not make the wound open and is more reliable.

5. The PTFE hydrophilic coating on the surface of the guide wire makes it very smooth and soft, easy and safe to find and insert into the contracted and narrow bladder neck.

Description of drawings

Figure 1 is a schematic diagram of a urethral drainage dilation catheter;

Fig. 2 is a schematic diagram of a hollow curved inner sheath;

Fig. 3 is the sectional view of A-A direction in Fig. 1;

Fig. 4 is a schematic diagram of the use method of the urethral drainage dilation catheter with the inner sheath and the guide wire.

In the figure: 1 tube head, 101 guide hole, 102 injection hole, 2 tube body, 201 drainage hole, 202 first airbag, 203 second airbag, 204 first inflation channel, 205 injection channel, 206 second inflation channel, 3 Pipe tail, 301 first air bag tube, 302 second air bag tube, 303 injection tube, 304 urine outlet tube, 305 conduction valve, 4 pressure measuring device, 401 pressure gauge, 402 rod head, 403 push rod, 404 piston head, 405 threads, 406 connectors, 5 hollow curved inner sheaths, 501 guide wire holes, 6 guide wires.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

Example 1

A urethral dilatation and drainage device, comprising a urethral drainage dilation catheter, an inner sheath 5, a guide wire 6, and a pressure measuring device 4; the urethral drainage dilation catheter includes a tube head 1, a tube body 2, and a tube tail 3, with Guide hole 101, the tube body 2 is provided with a drainage hole 201 near the tube head 1, the tube body 2 below the drainage hole 201 is covered with a first air bag 202 and a second air bag 203, and the inner wall of the tube body 2 is provided with a first inflatable Channel 204 and second inflation channel 206; tube tail 3 includes a urine outlet tube 304, a first balloon tube 301 and a second balloon tube 302, the bottom end of the first balloon tube 301 is provided with a conduction valve 305, and the first balloon tube 201 passes through The first inflation channel 204 communicates with the first air bag 202, and the second air bag tube 302 communicates with the second air bag 203 through the second inflation channel 204; the inner sheath 5 top is provided with a guide wire hole 501; Hard steel wire, the guide wire 6 is placed in the inner sheath 5, and the front end of the guide wire 6 passes through the guide wire hole 501 at the top of the inner sheath 5;

The second airbag 203 is cylindrical after being inflated;

The tube head 1 is provided with an injection hole 102, the tube wall of the tube body 2 is provided with an injection channel 205, and the tube tail 3 is provided with an injection tube 303, and the injection tube 303 communicates with the injection hole 102 through the injection channel 205;

The surface of the guide wire 6 is provided with PTFE coating, and the PTFE hydrophilic coating on the surface of the guide wire 6 makes it very smooth and soft, easy and safe to find and insert into the contracted and narrow bladder neck;

The inner sheath 5 is a hollow cylindrical shape with a radian, the tail end of the inner sheath is open, the diameter of the inner sheath 5 is smaller than the inner diameter of the tube body 2 of the urethral drainage dilation catheter, and the inner sheath 5 is in a curved "L" shape, which is more suitable for The physiological curvature of the male urethra for easy insertion;

The second airbag tube 302 is provided with a pressure measuring device 4, the pressure measuring device 4 includes a connector 406, a closed lumen and a pressure gauge 401, the connector 406 communicates with the sealed lumen, and the pressure gauge 401 is located in the upper part of the sealed lumen, A thread 405 is provided on the inner wall of the closed lumen, and a screw push rod is provided in the closed lumen. The screw push rod includes a piston head 404, a push rod 403 and a rod head 402, and the piston head cooperates with the 404 thread 405;

When in use, insert the curved hollow inner sheath 5 into the urethral drainage and dilation catheter, insert the guide wire 6, pull the guide wire 6 out from the guide hole 101 of the urethral drainage and dilation catheter tube head 1, and hold the urethral drainage and dilation catheter by hand. The catheter tail 3 inserts the urethral drainage dilation catheter, the hollow inner sheath 5 and the guide wire 6 together into the urethra. When reaching the position of the bladder neck, the guide wire 6 is continuously pushed and inserted to find the contracted and narrow bladder neck, and the guide wire 6 is inserted smoothly. Finally, firmly hold the urethral drainage dilation catheter and the inner sheath 5, and insert it into the bladder according to the physiological curvature of the male urethra, and the urine can be seen to flow out. Inflate the first balloon 202 by 15ml, pull the urethral drainage and dilation catheter, and fix the urethral drainage and dilation catheter at the neck of the bladder through the first balloon 202. Located at the neck of the bladder, the pressure measuring device 4 is connected to the second balloon tube 302 through the connection head 406, rotate the handle head 402, observe the pressure change of the pressure gauge 401, and stop pressurizing when the pressure gauge 401 shows 10ATM, 10 minutes Then reversely rotate the rod head 402 until the pressure on the pressure gauge 401 returns to zero, then pull the urethral drainage dilation catheter to reset it, continue to drain urine, and expand the scar tissue of the bladder neck intermittently according to the clinical needs. In addition, bleeding symptoms can be treated by injecting medicine through the injection tube 303, or injecting physiological saline for washing.

Example 2

A method for using a urethral dilation and drainage device, comprising the following steps:

1) Insert the curved hollow inner sheath 5 into the urethral drainage and dilation catheter first, insert the guide wire 6, and lead out the front end of the guide wire 6 from the guide hole 101 of the tube head 1 of the urethral drainage and dilation catheter;

2) Hold the tail 3 of the urethral drainage dilation catheter and insert it into the urethra. When reaching the position of the bladder neck, continuously insert and insert the guide wire 6 to find the contracted and narrow bladder neck;

3) After the guide wire 6 is successfully inserted, firmly hold the catheter and the inner sheath 5, and insert it into the bladder according to the physiological curvature of the male urethra until urine flows out;

4) Pull out the guide wire 6 after seeing the urine flow out, pull out the inner sheath 5, use a graduated syringe to inflate the first balloon 202 by 15ml, pull the urethral drainage dilation catheter, and fix it to the bladder through the first balloon 202 neck position;

5) After fixing it in place, insert the urethral drainage dilation catheter 1 cm into the bladder so that the second balloon 203 is located at the neck of the bladder, then connect the connector 406 of the pressure measuring device 4 to the second balloon tube 302, and rotate the rod head 402, inject air into the second air bag 203, observe the pressure change of the pressure gauge 401, and stop pressurizing when the pressure gauge 401 shows 10ATM;

6) After 10 minutes, reversely rotate the rod head 402 until the pressure on the pressure gauge 401 returns to zero, then pull the urethral drainage dilation catheter to reset it, and continue to drain urine;

7) For the common bladder neck contracture and stenosis after resection of the prostate, dilate the urethra twice a day.

Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Claims (7)

1. A urethral dilatation and drainage device, characterized in that it comprises a urethral drainage dilation catheter, an inner sheath, a guide wire and a pressure measuring device; There is a guide hole in the middle, and the tube body is provided with a drainage hole near the tube head. The tube body below the drainage hole is covered with a first air bag and a second air bag, and the inner wall of the tube is provided with a first air bag. channel and the second inflation channel; the tail of the tube includes a urine outlet tube, the first air bag tube and the second air bag tube, the bottom end of the first air bag tube is provided with a conduction valve, and the first air bag tube passes through the first air bag tube The channel communicates with the first air bag, and the second air bag tube communicates with the second air bag through the second inflatable channel; a guide wire hole is provided at the top of the inner sheath; the guide wire is a steel wire with a soft front end and a hard rear end, The wire is placed in the inner sheath, and the front end of the guide wire passes through the guide wire hole at the top of the inner sheath. 2 . The urethral dilatation and drainage device according to claim 1 , wherein the second airbag is cylindrical after being inflated. 3 . 3. A kind of urethral expansion and drainage device according to claim 2, characterized in that, the tube head is provided with an injection hole, the tube wall side wall of the tube body is provided with an injection channel, and the tube tail is provided with The injection tube communicates with the injection hole through the injection channel. 4. A urethral dilatation and drainage device according to claim 2, wherein the surface of the guide wire is provided with a PTFE coating. 5. A urethral dilatation and drainage device according to claim 3, wherein the inner sheath is a hollow cylindrical shape with a radian, the tail end of the inner sheath is open, and the diameter of the inner sheath is smaller than that of the urethra Dilation catheter tube inner diameter. 6. A kind of urethral dilation and drainage device according to claim 4, characterized in that, the second balloon tube is provided with a pressure measuring device, and the pressure measuring device comprises a connector, a closed lumen and a pressure gauge, and the connector is connected to the pressure gauge. The airtight lumen is connected, the pressure gauge is set in the upper part of the airtight lumen, the inner wall of the airtight lumen is provided with threads, and the inner wall of the airtight lumen is provided with a screw push rod. The screw push rod includes a piston head, a push rod and a rod head. The thread fits. 7. A method for using the urethral dilatation and drainage device according to any one of claims 1 to 6, characterized in that it comprises the following steps: 1) First insert the curved hollow inner sheath into the urethral dilation catheter, insert the guide wire, and lead out the front end of the guide wire from the guide hole of the urethral dilation catheter head; 2) Hold the tail of the urethral dilatation catheter and insert it into the urethra. When it reaches the bladder neck, continuously insert and adjust the guide wire to find the contracture and narrow bladder neck; 3) After the guide wire is successfully inserted, firmly hold the catheter and the inner sheath, and insert it into the bladder according to the physiological curvature of the male urethra until urine flows out; 4) Pull out the guide wire after seeing the urine flow out, pull out the inner sheath, inflate the first balloon by 15ml, pull the urethral dilatation catheter, and fix it at the neck of the bladder through the first balloon; 5) After fixing it in place, insert the urethral dilation catheter 1 cm into the bladder so that the second balloon is located at the neck of the bladder, then connect the connector of the pressure measuring device to the tube of the second balloon, rotate the rod head, and insert it into the second balloon. Inject air, observe the pressure change of the pressure gauge, and stop pressurizing when the pressure gauge shows 10ATM; 6) After 10 minutes, reversely rotate the rod head until the pressure on the pressure gauge returns to zero, then pull the urethral dilation catheter to reset it and continue to drain urine; 7) For the common bladder neck contracture and stenosis after resection of the prostate, dilate the urethra twice a day.