A ureteral catheter

Abstract

The disclosed embodiment provides a ureteral catheter, which includes a tube body, a double-cavity structure including at least an expansion cavity and a drainage cavity is arranged in the tube body, a balloon is arranged on the tube body, the expansion cavity is connected to the balloon, a joint is arranged at the proximal end of the tube body, the expansion cavity and the drainage cavity extend to the proximal end of the tube body and are connected to the joint, and the distal end of the drainage cavity is arranged as an arc structure, and its end is arranged as an opening. The disclosed embodiment adjusts the tube body structure of the existing balloon dilatation catheter, optimizes the drainage effect from the renal pelvis to the bladder during the balloon dilatation process, significantly reduces the risk of hydronephrosis, is expected to be retained in the body and maintain continuous dilatation of the narrow ureter for 30-90 days, solves the problem that the balloon dilatation catheter can only dilate in the short term and has poor long-term effect, and has excellent therapeutic effect on ureteral stenosis.

Description

Technical Field

[0001] The present disclosure relates to the field of medical devices, and in particular to a ureteral catheter. Background Art

[0002] In the spectrum of urological diseases, ureteral stenosis is one of the more common diseases and can occur at any age. Ureteral stenosis is mostly a chronic progressive disease. There may be no clinical symptoms in the early stage. As the degree of stenosis gradually worsens, hydronephrosis gradually worsens, which can lead to renal damage on the affected side and even renal failure. Generally speaking, the closer the ureteral stenosis is to the kidney, the earlier the damage to renal function occurs and the more severe it is. Early treatment is particularly important to avoid renal damage. At this stage, surgical treatment is still the main treatment for the treatment of ureteral stenosis.

[0003] In recent years, with the increasing maturity of urological intracavitary techniques, especially ureteroscopy, and the upgrading of intracavitary surgical equipment, minimally invasive intracavitary techniques have become the main means of treating ureteral stenosis. Ureteral catheter dilation has been widely used in clinical practice due to its advantages such as easy operation and few postoperative complications.

[0004] At present, conventional balloon dilatation catheters use a double-lumen structure consisting of a balloon dilatation cavity and a guidewire cavity. When used, the balloon catheter is guided by the guidewire to the vicinity of the stenosis, and then a pressure pump is used to inject liquid to fill the balloon to dilate the ureteral stenosis. Since the guidewire cavity of the balloon catheter is small in size and the tube body is in a closed state, the flow of urine in the ureter is further obstructed and cannot be drained in time. Therefore, the balloon cannot be left in the stenosis for long-term dilation, and the long-term effect of short-term balloon dilation is poor. Summary of the invention

[0005] The purpose of the embodiment of the present disclosure is to provide a ureteral catheter to solve the problems existing in the prior art. In order to solve the technical problems, the embodiment of the present disclosure adopts the following technical solutions:

[0006] An embodiment of the present disclosure provides a ureteral catheter, which includes a tube body, in which a double-cavity structure including at least an expansion cavity and a drainage cavity is arranged, a balloon is arranged on the tube body, the expansion cavity is communicated with the balloon, a joint part is arranged at the proximal end of the tube body, the expansion cavity and the drainage cavity extend to the proximal end of the tube body and are connected to the joint part, and the distal end of the drainage cavity is arranged as at least one arc-shaped structure, and its end is arranged as an opening.

[0007] In some embodiments, drainage holes are provided on the cavity surface of the drainage cavity.

[0008] In some embodiments, the drainage holes are evenly distributed in a straight line or in a spiral shape on the drainage cavity.

[0009] In some embodiments, the distribution density and / or aperture of the drainage holes on the arc-shaped structure are greater than the distribution density and / or aperture of the drainage holes at other positions on the drainage cavity.

[0010] In some embodiments, developing rings are provided on both sides of the balloon.

[0011] In some embodiments, the balloon is made of polyurethane, nylon, or segmented polyamide.

[0012] In some embodiments, the arc-shaped structure is a ring-shaped structure.

[0013] In some embodiments, the tail end of the expansion cavity is located in the middle section of the balloon, and a through hole is provided at the tail end of the expansion cavity to communicate with the balloon.

[0014] In some embodiments, the joint portion is in a Y-shaped structure, comprising a first arm and a second arm that cross each other, one end of the first arm is connected to the drainage cavity, and the other end of the first arm is used for an external drainage bag; one end of the second arm is connected to the expansion cavity.

[0015] In some embodiments, a two-way valve capable of achieving on-off is provided on the second arm.

[0016] The disclosed embodiment adjusts the tube structure of the existing balloon dilatation catheter, optimizes the drainage effect from the renal pelvis to the bladder during the balloon dilatation process, significantly reduces the risk of hydronephrosis, and is expected to remain in the body and maintain continuous dilatation of the narrow ureter for 30-90 days, thereby solving the problem that the balloon dilatation catheter can only dilate in the short term and has poor long-term effects, and has excellent therapeutic effects on ureteral stenosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic structural diagram of a ureteral catheter according to an embodiment of the present disclosure;

[0019] Figure 2 It is a schematic structural diagram of a ureteral catheter according to an embodiment of the present disclosure;

[0020] Figure 3 It is a cross-sectional schematic diagram of a tube body in a ureteral catheter according to an embodiment of the present disclosure;

[0021] Figure 4(a) Figure 4 (b) Figure 4 (c) is a schematic diagram of the arrangement of drainage holes in the ureteral catheter according to an embodiment of the present disclosure;

[0022] Figure 5 (a) Figure 5 (b) Figure 5 (c) is a schematic diagram of the structure of the arc structure in the ureteral catheter of the embodiment of the present disclosure.

[0023] Reference numerals:

[0024] 1-tube body; 11-expansion cavity; 12-drainage cavity; 13-drainage hole; 2-balloon; 21-expansion hole; 3-joint part; 31-first arm; 32-second arm; 4-developing ring; 5-arc structure. DETAILED DESCRIPTION

[0025] Various aspects and features of the present disclosure are described herein with reference to the drawings.

[0026] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0028] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the attached drawings.

[0029] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0030] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0031] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0032] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0033] The present disclosure provides a ureteral catheter, which is used to achieve long-term dilation of the diseased and narrowed part of the patient's ureter to facilitate later treatment. Figure 1 As shown, Figure 1 A schematic structural diagram of the ureteral catheter involved in an embodiment of the present disclosure is shown, wherein the overall outer diameter of the ureteral catheter is in the range of 4-12F, that is, its effective length when working is in the range of 15-100cm. The outer diameter and effective length here are matched with the ureters of different patients, so that the requirements of use and expansion in ureters of different diameters or lengths can be met.

[0034] Specifically, continue as Figure 1 As shown, the ureteral catheter includes a tube body 1, which is a cylindrical tube with a double-lumen structure inside. A balloon 2 is arranged on the tube body 1. The balloon 2 here can be located at different positions away from the distal end of the tube body 1 to meet the differentiated requirements of the ureteral stenosis to be expanded. The distal end mentioned in this embodiment refers to the end away from the operator and close to the patient's operating position, and the proximal end refers to the end close to the operator and away from the patient.

[0035] The balloon 2 can be filled with liquid through the tube body 1. After being filled with liquid, the balloon 2 expands in the ureter. The diameter of the balloon 2 after expansion is in the range of 4-8 mm and the length is in the range of 20-200 mm. In order to facilitate the expansion of the balloon 2, the balloon 2 here can be made of materials such as polyurethane, nylon or block polyamide.

[0036] In addition, developing rings 4 are provided on both sides of the balloon 2, and the developing rings 4 can facilitate real-time observation of the position of the balloon 2 in the patient's ureter, thereby facilitating accurate and long-term placement of the balloon 2 in the ureter. The number and position of the developing rings 4 can be determined according to actual needs, for example, according to the length of the balloon. Furthermore, a hydrophilic coating can be provided on the surface of the tube body 1 and the balloon 2.

[0037] Furthermore, if Figure 3 As shown, Figure 3 A cross-sectional schematic diagram of the tube body 1 is shown, in which a double-cavity structure including at least an expansion cavity 11 and a drainage cavity 12 is arranged. For example, the expansion cavity 11 and the drainage cavity 12 can be arranged in parallel along the length direction of the tube body 1 in the tube body 1. Here, the expansion cavity 11 and the drainage cavity 12 can both adopt a single-layer tube cavity structure, and the cavity can also be reinforced with a wire mesh or a spring to ensure a certain hardness.

[0038] Specifically, the expansion chamber 11 here is connected with the balloon 2, and is used to fill the balloon 2 when expansion is required, so that liquid can be injected into the balloon 2 through the expansion chamber 11 and fill the balloon 2. In one embodiment, in order to facilitate the communication between the expansion chamber 11 and the balloon 2, the tail end of the expansion chamber 11 can be located in the middle section of the balloon 2; in another embodiment, a through hole 21 can be provided at the tail end of the expansion chamber 11 to communicate with the balloon 2, so as to facilitate the liquid to enter the balloon 2.

[0039] The drainage cavity 12 here can be set through the balloon 2. The drainage cavity 12 is used to keep the urine in the ureter unobstructed so as to achieve timely drainage of urine. The length of the drainage cavity 12 is set so that it can pass through the bladder-ureter-kidney and other parts of the patient's body, thereby achieving urine drainage at multiple locations in the patient's body.

[0040] Furthermore, if Figure 1 As shown, a joint portion 3 is provided at the proximal end of the tube body 1, and the expansion cavity 11 and the drainage cavity 12 can extend to the proximal end of the tube body 1 and be connected to the joint portion 3. Specifically, the joint portion 3 is provided as a Y-shaped structure, which includes a first arm 31 and a second arm 32 that cross each other, one end of the first arm 31 is connected to the drainage cavity 12, and the other end of the first arm 31 can be externally connected to a drainage bag, so that urine drained from the bladder and the renal pelvis in the drainage cavity 12 can be drained to the outside of the body; one end of the second arm 32 is connected to the expansion cavity 11, so as to facilitate the delivery of liquid through an external syringe or pressure pump to fill the balloon 2.

[0041] In addition, in order to better achieve the filling of the balloon 2, a two-way valve that can be turned on and off is also provided on the second arm 32. In this way, since the second arm 32 is connected to the expansion chamber 11, when the balloon 2 is expanded, the two-way valve is opened to connect it to a syringe or a pressure pump, so that liquid can be injected into the expansion chamber 11 for expanding the balloon 2; after the filling is completed, the two-way valve is closed to prevent liquid backflow or gas entry, thereby keeping the balloon 2 in a continuous expansion state.

[0042] Further, continue as Figure 1 Combined with Figure 5 As shown, considering the need to drain urine from the bladder, renal pelvis and other locations through the drainage cavity 12, for this purpose, at least one arc-shaped structure 5 is set at the distal end of the drainage cavity 12 extending into the patient's body, and a plurality of continuous arc-shaped structures 5 can also be formed. The end of the drainage cavity 12 or the last arc-shaped structure 5 is set to be open to facilitate urine collection. The diameter of the arc-shaped structure 5 here is set according to the size of the patient's bladder, so that the arc-shaped structure 5 can be stably placed in the patient's bladder. For example, the arc-shaped structure 5 can be hung on the patient's bladder to facilitate stable urine collection. The increase in the number of the arc-shaped structures 5 here can increase the drainage area to drain and accommodate more urine.

[0043] In order to facilitate the arrangement of the arc structure 5 on the bladder to prevent the arc structure 5 from falling off, the arc structure 5 here has various structural forms based on factors such as the structure of the bladder, such as Figure 5 As shown, the arc structure 5 can be as follows Figure 5 (a) shows a complete ring-shaped structure, that is, the distal end of the drainage cavity 12 is bent into a closed ring-shaped structure, which is convenient for being stably hung on the bladder; of course, it can also be as Figure 5 (b) and Figure 5 (c) shows that an open loop structure is formed, which can not only be set on the patient's bladder, but also can adjust the arc curvature according to the size of the bladder to be suitable for bladders of different sizes or ureteral openings of different orientations. In addition, the arrangement of the arc structure 5 can effectively improve the fixing strength of the ureteral catheter to maintain the stability of the drainage position.

[0044] Furthermore, the arc structure 5 is made of a soft material with good biocompatibility, such as polyurethane, polyamide or silicone, so that the stimulation to the bladder when it is suspended at, for example, the ureteral opening can be reduced.

[0045] In addition, to facilitate the drainage of urine, such as Figure 4 (a) Figure 4 (b) Figure 4 As shown in (c), a drainage hole 13 is provided on the surface of the drainage cavity 12. The shape of the drainage hole 13 can be circular, elliptical or other similar shapes. For example, Figure 1 The drainage hole 13 is arranged at the portion A of the tube body 1 shown in the figure. The drainage hole 13 can be located on the surface of the proximal end and the middle portion of the drainage cavity 12, or on the surface of the arc structure 5 at the distal end.

[0046] Preferably, since the arc-shaped structure 5 has a larger drainage area, it can collect more urine in the bladder. For this reason, the distribution density of the drainage holes 13 on the arc-shaped structure 5 is greater than the distribution density of the drainage holes 13 at other positions on the drainage cavity 12, so as to improve the efficiency of collecting urine in the bladder. The density here refers to the number of the drainage holes 13 per unit area on the surface of the drainage cavity 13. Of course, in order to improve the drainage efficiency, in another embodiment, the aperture of the drainage holes 13 on the arc-shaped structure 5 is greater than the aperture of the drainage holes 13 at other positions on the drainage cavity 12. In this way, by changing the density and / or aperture of the drainage holes 12, the arc-shaped structure 5 can drain more urine at positions such as the bladder, and achieve a better drainage effect.

[0047] In this way, the design of the arc-shaped structure 5 located at the distal end of the drainage cavity 12 here can not only be fixed in the position of the patient's bladder, but also can increase the length of the drainage cavity 12 in the patient's bladder so that urine can be fully drained, and the distribution of the drainage holes 13 located on the drainage cavity 12, especially at the arc-shaped structure 5, significantly increases the drainage area. In this way, the mutual cooperation between the arc-shaped structure 5 and the drainage holes 13 here can significantly improve the drainage effect in the bladder.

[0048] Furthermore, considering that the proximal end and the middle section of the drainage cavity 12 are located in the renal pelvis and the ureter, the drainage holes 13 are evenly distributed on the drainage cavity 12. For example, the drainage holes 13 can be arranged at predetermined intervals on the cavity surface of the drainage cavity 12. In terms of the arrangement, the drainage holes 13 can be distributed in a straight line, so as to maintain smooth drainage of the entire bladder-ureter-kidney process and reduce the risks of infection and hydronephrosis. Preferably, they can also be distributed in a spiral shape along the cavity surface, which can improve the drainage efficiency, thereby effectively draining urine from different positions, and the drainage effect is better than that of a linear arrangement.

[0049] The method of using the ureteral catheter for long-term dilation and drainage of ureteral stenosis according to the embodiment of the present disclosure is as follows:

[0050] After determining the stenosis position of the patient's ureter, select the ureteral catheter of appropriate specifications or sizes, and push the connector 3 toward the patient's ureter through a guide wire, for example. Under X-ray irradiation, the developing rings 4 at both ends of the balloon 2 can accurately locate the position of the balloon 2 in the ureter until the balloon 2 reaches the designated stenosis position.

[0051] After the ureteral catheter is delivered to the designated stenotic position, a syringe or a pressure pump is connected through the second arm 32 as a secondary channel and the two-way valve is opened to fill the balloon 2 with liquid until the balloon 2 is inflated, thereby completing the expansion of the stenotic position. Then, the syringe or the pressure pump is removed and the two-way valve on the second arm 32 is closed to complete the insertion of the ureteral catheter. Then, by connecting an external drainage bag to the first arm 31 for drainage of the liquid in the bladder-ureter-kidney, the urine in the bladder-ureter-kidney and other parts enters the drainage cavity 12 through the drainage hole 13 and is finally discharged from the patient's body, thereby enabling the long-term expansion of the balloon 2 in the patient's body, facilitating other surgical operations.

[0052] The disclosed embodiment adjusts the tube structure of the existing balloon dilatation catheter, optimizes the drainage effect from the renal pelvis to the bladder during the balloon dilatation process, significantly reduces the risk of hydronephrosis, and is expected to remain in the body and maintain continuous dilatation of the narrow ureter for 30-90 days, thereby solving the problem that the balloon dilatation catheter can only dilate in the short term and has poor long-term effects, and has excellent therapeutic effects on ureteral stenosis.

[0053] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0054] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0055] Multiple embodiments of the present disclosure are described in detail above, but the present disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concepts of the present disclosure, and these variations and modifications should all fall within the scope of protection required by the present disclosure.

Claims

1. A ureteral catheter, comprising a tube body, a double-cavity structure including at least an expansion cavity and a drainage cavity is arranged in the tube body, a balloon is arranged on the tube body, the expansion cavity is communicated with the balloon, a joint part is arranged at the proximal end of the tube body, the expansion cavity and the drainage cavity extend to the proximal end of the tube body and are connected to the joint part, characterized in that: The distal end of the drainage cavity is configured as at least one arc-shaped structure, the distal end of which is configured as an opening, the arc-shaped structure is an unclosed ring-shaped structure, drainage holes are configured on the cavity surface of the drainage cavity, and the distribution density and / or aperture of the drainage holes on the arc-shaped structure are greater than the distribution density and / or aperture of the drainage holes at other positions on the drainage cavity.

2. The ureteral catheter according to claim 1, characterized in that: The drainage holes are evenly distributed in a straight line or in a spiral shape on the drainage cavity.

3. The ureteral catheter according to claim 1, characterized in that: Development rings are arranged on both sides of the balloon.

4. The ureteral catheter according to claim 1, characterized in that: The balloon is made of polyurethane, nylon or block polyamide.

5. The ureteral catheter according to claim 1, characterized in that: The tail end of the expansion cavity is located in the middle section of the balloon, and a through hole is arranged at the tail end of the expansion cavity to communicate with the balloon.

6. The ureteral catheter according to claim 1, characterized in that: The joint part is in a Y-shaped structure, including a first arm and a second arm that cross each other, one end of the first arm is connected to the drainage cavity, and the other end of the first arm is used for externally connecting a drainage bag; one end of the second arm is connected to the expansion cavity.

7. The ureteral catheter according to claim 6, characterized in that: A two-way valve capable of achieving on and off is arranged on the second arm.

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