CN204563249U - A kind of anti-reflux ureter rack tube - Google Patents

Abstract

The utility model provides an anti-reflux ureteral stent tube, which comprises a hollow tube body, a first curled section and a second curled section, and the first curled section includes a curved section, an elastic switch section and a urine outlet connected in sequence The elastic switch section includes a bracket for supporting and connecting the curved section and the urine outlet, and two elastic films that are arranged between the curved section and the urine outlet and are attached to each other. The anti-reflux ureteral stent provided by the utility model is provided with an elastic switch section on the first curled section, which can control the liquid flow in the first curled section. Open and close during the change of the ureteral stent to realize the one-way drainage of the ureteral stent and prevent the urine in the bladder from returning to the renal pelvis to cause secondary damage to the patient.

Description

An anti-reflux ureteral stent

technical field

The utility model relates to the technical field of medical devices, in particular to an anti-reflux ureteral stent tube.

Background technique

The ureteral stent is a slender flexible tube that is left in the ureter of the human body for diseases such as urinary tract obstruction caused by ureteral stenosis caused by various reasons. The ureteral stent is placed in the patient's ureter to support the ureter, one end is set in the patient's kidney, and the other end is set in the patient's bladder to drain the urine in the kidney and postoperative small stones into the bladder. When the ureteral stent is placed in the ureter, the material is soft, which can reduce the irritation to the ureter and bladder. The indwelling time is generally less than three months, which relieves the pain of the patient and reduces the risk of postoperative ureteral stricture and secondary kidney stones. .

However, most of the ureteral stents currently on the market are two-way drainage stents. After being inserted into the human body, the urine in the bladder is likely to flow back into the kidney through the ureteral stent when the patient is lying down or standing to urinate. As a result, the patient's waist pain, renal colic, or secondary urinary tract infection are caused, and more seriously, secondary dilated water infection and renal function impairment are caused.

Utility model content

The purpose of this utility model is to solve the shortcomings of the existing ureteral stent tube placed in the patient's body, the urine in the bladder is easily backflowed back into the kidney due to bidirectional drainage, resulting in discomfort or even secondary damage to the patient, and to provide an anti-reflux ureter The stent tube, which is placed in the patient's body, realizes the one-way drainage effect of the ureteral stent tube and prevents the urine in the bladder from backflowing back into the kidney.

The technical solution adopted by the utility model to solve the technical problem is: an anti-reflux ureteral stent tube, which includes a hollow tube body placed in the patient's ureter and two ends of the hollow tube body respectively placed in the patient's bladder. The first crimped section and the second crimped section placed in the patient's renal pelvis, the hollow tube and the second crimped section are respectively provided with at least one through hole for the inflow of urine, the first crimped The section includes a curved section connected in sequence, an elastic switch section and a urine outlet, one end of the curved section communicates with the hollow tube body, and the elastic switch section includes a support for connecting the curved section and the urine outlet. The bracket of the mouth and two pieces of elastic films that are arranged between the curved section and the urine outlet are attached to each other.

Further, the upper and lower sides of the two elastic films are respectively sealed and fixed on the outer wall of the curved section and the outer wall of the urine outlet, and the left and right sides of the two elastic films are attached and fixed to each other.

Further, the thickness of the elastic film is 0.1mm-0.2mm.

Further, the urine outlet is a trumpet-shaped opening, the front end of the urine outlet is an oval opening, the tail end of the urine outlet is a circular opening, and the cross-sectional area of the oval opening is larger than the The cross-sectional area of the circular opening, the circular opening is fixedly connected to the curved section through the bracket.

Further, the urine outlet, the bracket and the curved section are integrally formed.

Specifically, the elastic film is a medical silicone film.

Specifically, the curvature radius R of the curved section of the first curled section is 0.25mm≤R≤0.5mm.

Specifically, a hydrophilic gel film layer is provided on the outside of the hollow tube body, the first curled section and the second curled section.

The beneficial effect of the utility model is that: the anti-reflux ureteral stent tube provided by the utility model is provided with an elastic switch section on the first crimped section placed on the side of the patient's bladder section, which can control the opening of the first crimped section. Due to the effect of liquid flow, the two elastic films of the elastic switch section open and close during the change of internal and external pressure. When the liquid pressure outside the first curled section of the ureteral stent tube is higher than the internal liquid pressure, the external liquid compresses the two pieces. The elastic film makes the two elastic films stick together, thus closing the first curled section, so that the liquid outside the first curled section can no longer enter the first curled section; otherwise, the two elastic films are opened, making the first curled section The liquid in the bladder is discharged through the urine outlet, so that the unidirectional drainage of the ureteral stent tube is realized, and the urine in the bladder is prevented from returning to the renal pelvis to cause secondary damage to the patient.

Description of drawings

Fig. 1 is the front view of the anti-reflux ureteral stent provided by the embodiment of the present invention;

Fig. 2 is a partial enlarged view of the first crimp section provided by the embodiment of the present invention;

Fig. 3 is the sectional view of A-A place among Fig. 2;

Fig. 4 is a schematic diagram of the three-dimensional structure of the first crimping section provided by the embodiment of the present invention.

In the picture: 1-Anti-reflux ureteral stent tube

11-Hollow straight pipe 12-The first curling section

13-Second crimp section 14-Through hole

121-Bending section 122-Elastic switch section

123-urine outlet

1231-Oval opening 1232-Round opening

1221-Bracket 1222-Elastic film

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Referring to Fig. 1-Fig. 4, it is an anti-reflux ureteral stent tube 1 provided by the embodiment of the present invention. Specifically, the ureteral stent 1 includes a hollow tube body 12 placed in the patient's ureter, a first crimped section 12 placed in the patient's bladder and a second coiled section 12 placed in the patient's renal pelvis respectively arranged at both ends of the hollow tube body 12. 2. Curl segment 13. The anti-reflux ureteral stent tube 1 provided by the utility model is made of polyurethane (PU), which is very soft and durable, has high bending resistance, and can ensure that the hollow tube body 1 is bent at 90° in both directions. After repeated bending 20 times, it still remains soft and can automatically return to its original shape. And the ureteral stent tube 1 provided by the utility model is also provided with a hydrophilic gel film layer (not shown in the figure) on the outside of the hollow tube body 11 , the first curved section 12 and the second curved section 13 . The hydrophilic gel film layer will not affect the urine flow at the through hole 14 on the ureteral stent tube 1 . However, the hydrophilic gel film layer can improve the smoothness of the outside of the ureteral stent tube, and at the same time reduce the stimulation of the patient's ureter, renal pelvis and bladder after the ureteral stent tube 1 is placed in the patient's body. The existing ureteral stent 1 is generally left in the patient's body for no more than three months, and after adding a hydrophilic gel film layer, it can reduce bladder irritation and reduce the probability of calculus formation in the ureteral stent, prolong the indwelling time, and has the function of hydrophilic gel. The ureteral stent tube 1 of the film layer can be effectively left in the patient's body for one year, thereby greatly increasing the service life of the ureteral stent tube 1 . However, the ureteral stent 1 provided by the utility model can be well implanted in the patient's ureter, and plays the role of supporting the ureter and draining urine and gravel.

Specifically, as shown in FIG. 1, the anti-reflux ureteral stent 1 provided by the embodiment of the present invention is provided with at least one through hole 14 for the inflow of urine on the hollow tube body 11 and the second curled section respectively. . Urine can not only flow into the hollow tubular body 1 through the port of the second curled section 13, but also pass through the second curled section 13 of the through hole 14 and the joint between the hollow tubular body 11 and the second curled section 13. The two crimped sections 13 and the through holes 14 on the hollow tube body 11 flow into the hollow tube body 1, increasing the channel for urine to flow in. The anti-reflux ureteral stent 1 provided by the utility model can play the role of anti-reflux because of its unique structure of the first crimped section 12, which enables it to realize one-way drainage. The first crimped section 11 includes a curved section 121 , an elastic switch section 122 and a urine outlet 123 connected in sequence, and one end of the curved section 121 communicates with the hollow tube body 11 . The elastic switch section 122 includes a bracket 1221 for supporting the connection between the curved section and the urine outlet, and two elastic films 1222 that are arranged between the curved section and the urine outlet. The first crimp section 12 realizes one-way drainage through the elastic switch section 122, and the elastic switch section 122 uses two elastic films 1222 to push the relative movement between the two elastic films 1222 by the change of the internal and external liquid pressure, Thus, the flow of liquid in the first crimped section 12 can be controlled. However, only the elastic film 1222 cannot guarantee the relative fixation between the curved section 121 and the urine outlet 123 , so a bracket 1221 needs to be provided in the middle of the elastic film 1222 . In this embodiment, two opposing support columns are provided. And the quantity of this support 1221 is different according to the difference of its material, if the material of this support 1221 is soft, then need to set the number of support 1221 more, to guarantee the stable between its fixed support bending section 121 and urine outlet 123 . Then, two elastic films 1222 are arranged outside the bracket 1221 to function as elastic switches. When the internal liquid pressure at the first crimped section 12 of the ureteral stent 1 in the bladder section is lower than the external liquid pressure, the external liquid pushes the two elastic films 1222 close to each other until they fit together. When the two elastic films 1222 are attached to each other, the outlet of the first curled section 12 is closed, and the liquid outside the first curled section 12 cannot flow into the first curled section 12 . Conversely, when the pressure of the internal liquid at the first crimped section 12 is greater than the pressure of the external liquid, the internal liquid pushes the two elastic films 1222 apart from each other, and at this moment, the liquid in the curved section 121 of the first crimped section 12 flows to the elastic switch section 122 , and flows out through the urine outlet 123 , the ureteral stent 1 realizes unidirectional drainage from the second crimped section 13 to the first crimped section 12 .

Specifically, referring to FIG. 3 and FIG. 4 , the upper and lower sides of the two elastic films 1222 are sealed and fixed on the outer wall of the curved section 121 and the outer wall of the urine outlet 123 respectively. The left and right sides of the two elastic films 1222 are attached and fixed to each other. When the two elastic films 1222 are separated from each other, the four sides of the two elastic films 1222 surround and form an elastic accommodation space, so that the liquid in the bending section 12 can flow into the elastic accommodation space, and the entrance of the elastic accommodation space It communicates with the curved section 121, the outlet and the urine outlet 123, and the two elastic films 1222 make the connection between the curved section 121 and the urine outlet 123, and the liquid in the hollow tube body 11 of the ureteral stent tube 1 can pass through the urine outlet. 123 outflows. When the two elastic films 1222 are attached to each other, the two elastic films 1222 block the connection between the curved section 121 and the urine outlet 123, so that the liquid outside the urine outlet 123 cannot enter the curved section 121, and the liquid in the curved section 121 Liquids cannot flow out. The sealing connection between the elastic film 1222 and the curved section 121 and the urine outlet 123 and the connection between the elastic films can not only be fixedly connected by a sealing ring, but also can be realized by other sealing and fixing methods such as glue bonding, etc., to realize the elastic film up and down. Fixed around the four sides.

Further, in order to ensure that the two elastic membranes 1222 at the elastic switch section 122 have higher sensitivity and ensure that they can move relative to each other with changes in internal and external pressure, the thickness of the elastic membranes 1222 should be controlled at 0.1 mm to 0.2 mm between. And the elastic film 1222 of the anti-reflux ureteral stent tube 1 provided by the utility model is a medical silica gel film, and the elastic material of the medical silica gel film enables the two elastic films 1222 to better elastically open and close during unidirectional drainage. It plays the role of positive drainage. When the pressure inside the ureteral stent 1 is higher than the external pressure, the distance between the two elastic films 1222 is larger, and the liquid in the first curled section 12 can be drained out as soon as possible and as much as possible. When the pressure inside the ureteral stent tube 1 is lower than the external pressure, the two elastic films 1222 can be closely attached to prevent the influx of urine outside the urine outlet 123 and play a good role in anti-reflux.

Specifically, please refer to Fig. 3 again, the urine outlet 123 provided by the embodiment of the utility model is a horn-shaped opening, the front end of the urine outlet 123 is an oval opening 1231, and the tail end of the urine outlet 123 is a circular opening 1232, and the cross-sectional area of the elliptical opening 1231 is greater than that of the circular opening 1232, and the circular opening 1232 is fixedly connected to the curved section 121 through the bracket 1221. The circular opening 1232 at the tail end of the urine outlet 123 is fixedly connected to the curved section 121 through the bracket 1221, then the liquid in the ureteral stent tube 1 enters the urine outlet 123 through the circular opening 1232, and then passes through the oval opening 1231 discharge. Just because of the design of the trumpet-shaped opening of the urine outlet 123, when the two elastic films 1222 at the elastic switch section 122 are opened, the liquid in the curved section 121 can flow to the urine outlet 123 more rapidly and faster The discharge of liquid in the ureteral stent tube 1. In this embodiment, the urine outlet 123, the bracket 1221, and the curved section 121 are all made of PU material, so the three can be integrally formed, thereby reducing the production cost of the ureteral stent tube 1, and are easy to process and manufacture. mass production.

At the same time, the first crimped section 12 of the anti-reflux ureteral stent tube 1 provided by the utility model also has certain restrictions on the radius of curvature R of the curved section 121, and the radius of curvature is 0.25mm≤R≤0.5mm. If the radius of curvature is less than 0.25mm, the curved section 121 of the first crimped section 12 is easily bent, thereby affecting the flow of urine in the ureteral stent tube 1 . And when the radius of curvature is too large to exceed 0.5 mm, the outer tube wall of the first curled section 12 is likely to touch the patient's bladder, causing touching and scratching of the bladder. Therefore, in order to enable the ureteral stent 1 to be better placed in the patient's body, the curvature radius of the first curled section 12 placed in the bladder is set between 0.25-0.5 mm.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model should be included in the utility model. within the scope of protection.

Claims (8)

1. an anti-reflux ureter rack tube, comprise the hollow tube that is placed in patient ureter and be located at being placed in the intravesical first volume tune of patient and being placed in the volume Two tune in patient's renal pelvis of described hollow tube two ends respectively, described hollow tube and described volume Two tune are respectively equipped with at least one through hole that can flow into for urine, it is characterized in that, described first volume tune comprises the bending section connected successively, elastic switch section and urine outlet, one end of described bending section is communicated with described hollow tube, described elastic switch section comprise for bending section described in support and connection and described urine outlet support and be located at two panels surrounding between described bending section and described urine outlet elastic film bonded to each other.

2. a kind of anti-reflux ureter rack tube as claimed in claim 1, it is characterized in that, the dual-side up and down of elastic film described in two panels is sealingly fastened on the outer wall of described bending section and the outer wall of described urine outlet respectively, and the limit, the left and right sides of elastic film described in two panels is bonded to each other fixing.

3. a kind of anti-reflux ureter rack tube as claimed in claim 1, is characterized in that, described elastic film thickness is 0.1mm ~ 0.2mm.

4. a kind of anti-reflux ureter rack tube as claimed in claim 1, it is characterized in that, described urine outlet is horn opening, the front end of described urine outlet is elliptical openings, the tail end of described urine outlet is circular open, the cross-sectional area of described elliptical openings is greater than the cross-sectional area of described circular open, and described circular open is fixedly connected with by described support with described bending section.

5. a kind of anti-reflux ureter rack tube as claimed in claim 1, is characterized in that, described urine outlet, described support and described bending section are one-body molded.

6. the anti-reflux ureter rack tube of the one as described in any one of claim 1-5, is characterized in that, described elastic film is medical silica-gel thin film.

7. the anti-reflux ureter rack tube of the one as described in any one of claim 1-5, is characterized in that, the radius of curvature R of the bending section of described first volume tune is 0.25mm≤R≤0.5mm.

8. the anti-reflux ureter rack tube of the one as described in any one of claim 1-5, is characterized in that, is equipped with hydrophilic gel rete outside described hollow tube, described first volume tune and described volume Two tune.