Three-balloon ureteral hydro-pneumatic dilation tube kit

Abstract

The present invention relates to a three-balloon ureteral liquid-gas dilation conduit kit, comprising a ureteral catheter, one end of which is provided with a tip drainage opening, and the side of the ureteral catheter close to the tip drainage opening is provided with an upper balloon, a spacer balloon and a lower balloon in sequence; the end of the ureteral catheter away from the upper balloon is provided with a first channel to a sixth channel in sequence; one side of the ureteral catheter is provided with a first opening and a second opening. The present invention divides the ureter into two cavities through the upper balloon, the spacer balloon and the lower balloon, and injects liquid or gas into the two cavities through the first opening and the second opening respectively; the liquid pressure of the two cavities is different in magnitude and action time, so as to achieve a substantially same dilation effect at one time under the premise of different ureteral anatomy and different dilation capabilities.

Description

Technical Field

[0001] The invention relates to the technical field of ureteral flexible endoscopic surgical treatment, in particular to a three-balloon ureteral liquid-gas dilation conduit kit. Background Art

[0002] Compared with rigid ureteroscopes, flexible ureteroscopes have a bendable function and can handle ureteral stones that go up the ureter to the kidney during lithotripsy. More and more patients are receiving ureteral flexible ureteroscope surgery. For kidney stones with surgical indications, percutaneous nephrolithotomy was the absolute mainstream for a long time before the development of ureteral flexible ureteroscope technology. Compared with percutaneous nephrolithotomy, flexible ureteroscope lithotripsy does not require renal puncture, so there is no risk of renal bleeding caused by puncture dilation and pulling the scope during lithotripsy. With the improvement of ureteral flexible ureteroscope technology and the promotion of this technology, in recent years, more and more kidney stones with less load and surgical indications and upper ureteral stones have been treated with ureteral flexible ureteroscopes. Percutaneous nephrolithotomy combined with ureteral flexible ureteroscope to remove residual stones is also a hot topic of research. For kidney stones with high hardness and unsuccessful extracorporeal shock wave lithotripsy, ureteral flexible ureteroscope lithotripsy has become the first choice.

[0003] Although flexible ureteroscope lithotripsy has many advantages over rigid ureteroscope and percutaneous nephrolithotomy, it also has its limitations, one of the most important of which is that the inner diameter of the ureteral cavity is relatively small, which limits the outer diameter of the soft endoscope and the diameter of the operation (water flow) channel. The consequences are: 1) In the first stage of flexible ureteroscope lithotripsy, the flexible ureteroscope sheath cannot be successfully placed into the relatively narrow ureteral cavity, and the flexible ureteroscope sheath cannot be inserted, which directly leads to the inability to complete the flexible endoscope lithotripsy operation. Even for units and experts with very rich operating experience, the catheterization failure rate of the first stage of flexible ureteroscope lithotripsy is about 10% or even higher. 2) The narrow inner diameter of the ureter increases the process requirements of the flexible ureteroscope, making the price of the flexible endoscope higher and easy to damage, which directly increases the cost of the technology and limits the development of the technology. 3) The operation channel of the ureteroscope is narrow, and the channel is occupied by the lithotripsy fiber during lithotripsy. The various consequences caused by the obstruction of water outflow include kidney damage caused by increased pressure, retrograde infection, accidental injury caused by unclear vision, decreased lithotripsy efficiency, prolonged operation time, and limited total operation time. It is true that the first-stage ureteral stent placement, which makes the ureter passively dilated, and then the second-stage ureteroscope lithotripsy can increase the success rate of sheath placement in ureteroscope lithotripsy to a certain extent. At present, many units use this method, but this operation requires two operations, and the interval between the two operations is about one week or even longer. Carrying a ureteral stent has a significant impact on the patient's quality of life: waist discomfort, hematuria, frequent urination, and low back pain during urination. Therefore, many units and experts with rich experience in ureteroscope operation refuse to place a stent before ureteroscope lithotripsy. Moreover, the effect of inserting a ureteral stent in advance to dilate the ureter is relatively limited. Whether to perform a primary stent placement to dilate the ureter before ureteroscopic lithotripsy has been a controversial topic in the urology community in recent years.

[0004] In fact, the ureter is an elastic, water-expandable muscular tube with a large passive expansion capacity, which can be understood from the anatomy of the ureter. Compared with mechanical force to expand the ureter, water and gas expand the ureter more gently and evenly. As a urologist, it is very easy to understand that the ureter is expanded by water and the inner diameter increases: when ureteral stones obstruct the ureter, the kidney and the part above the ureteral obstruction plane are expanded to varying degrees by urine, and the inner diameter of the ureter may even exceed 20mm. Moreover, this expansion is mostly reversible and is not accompanied by obvious damage to the anatomical structure and function of the ureter: after the acute ureteral obstruction is relieved for a period of time, B-ultrasound or angiography is performed again, and the originally expanded ureter no longer expands, the renal effusion disappears, and the renal function returns to normal. However, we can understand from the following experience that in the early stage of ureteral acute obstruction relief, the ureter remains dilated: patients with ureteral stones and renal colic undergo ureteroscopic lithotripsy, and only a spacious ureter is found, without ureteral stones, which means that the stones have been discharged. After the stones have been discharged, we can still obtain a spacious ureter.

[0005] On June 4, 2018, Dr. Li Qiang of Panyu Central Hospital submitted an invention patent application for "A double-balloon tubing kit for dilating the ureter" (application number: 201810563731.5) to the State Intellectual Property Office. The invention patent is currently in the stage of awaiting substantive examination. The patent discloses the use of liquid or gas pressure to dilate the ureter, and the dilation force is gentle, controllable and measurable, without damage or bleeding. After dilating the ureter with this tool and method, a thicker soft endoscope sheath can be inserted more conveniently and safely to increase the success rate of ureteroscope operations, reduce the process requirements and price of ureteroscopes, improve the performance of ureteroscopes, increase the diameter of the water flow channel, and quickly improve the safety and effectiveness of ureteroscopes.

[0006] The disadvantage of this invention is that it ignores the anatomical differences between the middle and upper sections of the ureter and the lower section of the ureter. The lower section of the ureter has an additional layer of circular muscle than the upper and middle sections of the ureter, and its ability to expand is lower than that of the upper and middle sections of the ureter. As a result, under the same air or water pressure and action time, the expansion effects of the lower section of the ureter are different from those of the upper and middle sections of the ureter.

[0007] In view of this deficiency, it is necessary to provide a three-balloon ureteral liquid-gas dilation conduit kit. Summary of the invention

[0008] Based on this, the purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and provide a three-balloon ureteral liquid-gas dilation conduit kit.

[0009] A three-balloon ureteral liquid-gas dilation conduit kit comprises a ureteral catheter, wherein one end of the ureteral catheter is provided with a tip drainage opening, and an upper balloon, a spacer balloon and a lower balloon are sequentially arranged at intervals on the side of the ureteral catheter close to the tip drainage opening; a first channel, a second channel, a third channel, a fourth channel, a fifth channel and a sixth channel are sequentially arranged on the end of the ureteral catheter away from the upper balloon; the first channel is communicated with the tip drainage opening, the second channel is communicated with the upper balloon, the third channel is communicated with the spacer balloon; the fourth channel is communicated with the lower balloon; a first opening and a second opening are provided on one side of the ureteral catheter; the first opening is located between the upper balloon and the spacer balloon, and the first opening is communicated with the fifth channel; the second opening is located between the spacer balloon and the lower balloon, and the second opening is communicated with the sixth channel; the first channel coincides with the ureteral catheter.

[0010] Furthermore, the distance between the spacer balloon and the upper balloon is greater than the distance between the spacer balloon and the lower balloon; the position between the spacer balloon and the upper balloon corresponds to the middle and upper sections of the ureter; the position between the spacer balloon and the lower balloon corresponds to the lower section of the ureter.

[0011] Furthermore, it also includes a first constant-pressure water replenishing device and a second constant-pressure water replenishing device; the first constant-pressure water replenishing device is connected to the fifth channel; and the second constant-pressure water replenishing device is connected to the sixth channel.

[0012] Furthermore, a seventh channel is provided at one end of the ureteral catheter away from the upper balloon; a third opening is provided at one side of the ureteral catheter; the third opening is located at a side away from the lower balloon, and the third opening is communicated with the seventh channel.

[0013] Furthermore, it also includes a bladder balloon; the bladder balloon is used to be placed inside the bladder, and is arranged on the side of the ureteral catheter away from the lower balloon; the end of the ureteral catheter away from the upper balloon is also provided with an eighth channel, and the eighth channel is connected to the bladder balloon; the third opening is located between the lower balloon and the bladder balloon.

[0014] Furthermore, the diameter of the ureteral catheter between the upper balloon and the lower balloon is smaller than the diameter of the ureteral catheter between the lower balloon and the bladder balloon.

[0015] Furthermore, the diameter of the ureteral catheter is 8Fr-13Fr.

[0016] Furthermore, the diameters of the second channel, the third channel, the fourth channel, the fifth channel, the sixth channel, the seventh channel and the eighth channel are 1.5Fr-2Fr.

[0017] Furthermore, an annular protrusion is provided on the circumferential side of the upper balloon, the spacer balloon, the lower balloon and the bladder balloon; the annular protrusion is connected with the corresponding upper balloon, the spacer balloon, the lower balloon or the bladder balloon; when the upper balloon, the spacer balloon, the lower balloon and the bladder balloon are not expanded, the annular protrusion is combined with the surface of the upper balloon, the spacer balloon, the lower balloon or the bladder balloon to form a smooth surface.

[0018] Furthermore, the axial direction of the annular protrusion is parallel to the axial direction of the ureteral catheter; and the annular protrusion on the surface of the bladder balloon is located on a side away from the lower balloon.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The ureter is divided into two cavities by an upper balloon, a spacer balloon, and a lower balloon, and liquid or gas is injected into the two cavities through the first opening and the second opening respectively; the liquid pressures and the duration of action of the two cavities are different, so as to achieve a substantially similar expansion effect at one time under the premise that different ureteral segments have different anatomy and expansion capabilities;

[0021] (2) By setting up the first constant pressure water replenishment device and the second constant pressure water replenishment device, the pressure of the cavities at both ends of the blocked ureter can be directly measured respectively, so as to manually or automatically adjust the liquid and gas injected into the fifth channel or the sixth channel to reach the set pressure, thereby ensuring that the ureter is expanded to a suitable diameter;

[0022] (3) By providing the seventh channel and the third opening, the third opening can be placed in the bladder, and the urine in the bladder can flow to the seventh channel through the third opening, thereby achieving the purpose of bladder urine drainage, making it convenient for users to discharge urine in the bladder, without having to insert a urinary catheter into the human body, thereby reducing the difficulty of insertion and the risk of injury;

[0023] (4) By setting up a bladder balloon, the bladder balloon can be used to clamp the position between the bladder and the urethra, thereby preventing the ureteral catheter from being pulled during the patient's activities, thereby preventing the patient from feeling uncomfortable, and at the same time avoiding the risk of ureteral catheter displacement, effectively improving the working stability of the ureteral catheter;

[0024] (5) By providing an annular protrusion, after the upper balloon, the spacer balloon, and the lower balloon are inflated, the annular protrusion can be used to completely fit the inner wall of the ureter, acting as a sealing ring to improve its sealing performance and prevent liquid or air from seeping out of the ureter during the process of injecting air or liquid into the blocked ureter; and the bladder balloon can better clamp the bladder neck position between the bladder and the urethra through the annular protrusion. Since the annular protrusion on the surface of the bladder balloon is located on the side away from the lower balloon, the annular protrusion can be used to clamp the bladder neck position between the bladder and the urethra, avoiding the entire bladder balloon from being blocked in the urethra and causing discomfort to the patient.

[0025] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of Embodiment 1;

[0027] Figure 2 is a cross-sectional schematic diagram of embodiment 1;

[0028] Figure 3 This is a schematic structural diagram of the second embodiment.

[0029] In the figure: 10, ureteral catheter; 11, tip drainage channel opening; 12, first channel; 13, second channel; 14, third channel; 15, fourth channel; 16, fifth channel; 17, sixth channel; 18, seventh channel; 19, eighth channel; 21, first opening; 22, second opening; 23, third opening; 30, upper balloon; 40, spacer balloon; 50, lower balloon; 60, bladder balloon; 71, first constant-pressure water replenishment device; 72, second constant-pressure water replenishment device; 80, annular protrusion. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] It should be understood that, in the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0032] It should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "couple" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Embodiment 1:

[0034] See also Figure 1 to Figure 2The three-balloon ureteral liquid-gas dilatation conduit kit of this embodiment comprises a ureteral catheter 10, wherein one end of the ureteral catheter 10 is provided with a tip drainage opening 11, and the side of the ureteral catheter 10 close to the tip drainage opening 11 is provided with an upper balloon 30, a spacer balloon 40 and a lower balloon 50 in sequence; the end of the ureteral catheter 10 away from the upper balloon 30 is provided with a first channel 12, a second channel 13, a third channel 14, a fourth channel 15, a fifth channel 16 and a sixth channel 17 in sequence; the first channel 12 is communicated with the tip drainage opening 11, the second channel 13 is communicated with the upper balloon 30, the third channel 14 is communicated with the spacer balloon 40; the fourth channel 15 is communicated with the lower balloon 50; one side of the ureteral catheter 10 is provided with a first opening 21 and a second opening 22; the first opening 21 is located between the upper balloon 30 and the spacer balloon 40, and the first opening 21 is communicated with the fifth channel 16; the second opening 22 Located between the spacer balloon 40 and the lower balloon 50 , the second opening 22 is communicated with the sixth channel 17 ; the first channel 12 coincides with the ureteral catheter 10 .

[0035] Specifically, the distance between the spacer balloon 40 and the upper balloon 30 is greater than the distance between the spacer balloon 40 and the lower balloon 50; the position between the spacer balloon 40 and the upper balloon 30 corresponds to the middle and upper sections of the ureter; the position between the spacer balloon 40 and the lower balloon 50 corresponds to the lower section of the ureter.

[0036] Specifically, the end of the ureteral catheter 10 away from the upper balloon 30 is further provided with a seventh channel 18; one side of the ureteral catheter 10 is further provided with a third opening 23; the third opening 23 is located on a side away from the lower balloon 50, and the third opening 23 is communicated with the seventh channel 18;

[0037] Specifically, it also includes a bladder balloon 60; the bladder balloon 60 is used to be placed inside the bladder, and is arranged on the side of the ureteral catheter 10 away from the lower balloon 50; the end of the ureteral catheter 10 away from the upper balloon 30 is also provided with an eighth channel 19, and the eighth channel 19 is connected to the bladder balloon 60; the third opening 23 is located between the lower balloon 50 and the bladder balloon 60;

[0038] In the preferred embodiment, the diameter of the ureteral catheter 10 between the upper balloon 30 and the lower balloon 50 is smaller than the diameter of the ureteral catheter 10 between the lower balloon 50 and the bladder balloon 60 .

[0039] In the preferred embodiment, the diameter of the ureteral catheter 10 is 8Fr-13Fr, and in the preferred embodiment, 13Fr.

[0040] In the preferred embodiment, the diameters of the second channel 13, the third channel 14, the fourth channel 15, the fifth channel 16, the sixth channel 17, the seventh channel 18 and the eighth channel 19 are 1.5Fr-2Fr, and the preferred diameter in the present embodiment is 1.5Fr.

[0041] Preferably, an X-ray-proof metal (not shown) is embedded in the upper balloon 30, the spacer balloon 40, the lower balloon 50 and the bladder balloon 60 to display the position of the balloons during the operation.

[0042] The working process of this embodiment:

[0043] Under the cystoscope, an operating side guide wire is inserted, and then the ureteral catheter 10 is inserted into the ureter from outside the body through the human urethra and then through the bladder along the guide wire, so that the upper balloon 30, the spacer balloon 40 and the lower balloon 50 are located in the ureter, and the bladder balloon 60 is located at the bladder position to clamp the position of the bladder neck of the human body; then water or air is injected into the upper balloon 30, the spacer balloon 40 and the lower balloon 50 through the second channel 13, the third channel 14 and the fourth balloon respectively, so that the upper balloon 30, the spacer balloon 40 and the lower balloon 50 block the ureter, and the middle section and the upper section and the lower section of the ureter are separated into two cavities; water or air is injected into the bladder balloon 60 through the eighth channel 19, and the bladder balloon 60 will clamp the bladder neck position between the bladder and the urethra, so that the ureteral catheter 10 is fixed in the human body as a whole and is not easily affected by external traction;

[0044] Then, water or gas is injected into the two cavities through the fifth channel 16, the first opening 21, the sixth channel 17 and the second opening 22 to expand the ureter. The liquid pressure and the action time of the two cavities can be treated differently to achieve basically the same expansion effect at one time under the premise of different ureteral anatomy and expansion capacity in different segments; the urine produced in the kidney is discharged to the body through the tip drainage channel 11 and the first channel 12; the urine in the bladder will be discharged to the body through the third opening 23 and the seventh channel 18.

[0045] Embodiment 2:

[0046] See also Figure 3 This embodiment makes the following improvements on the basis of the first embodiment:

[0047] Specifically, it also includes a first constant-pressure water replenishing device 71 and a second constant-pressure water replenishing device 72; the first constant-pressure water replenishing device 71 is connected to the fifth channel 16; the second constant-pressure water replenishing device 72 is connected to the sixth channel 17; the first constant-pressure water replenishing device 71 and the second constant-pressure water replenishing device 72 can preferably be automatic water replenishing valves, which can automatically replenish water to the fifth channel 16 or the sixth channel 17 according to the set pressure value to keep the water pressure in a constant pressure state; the first constant-pressure water replenishing device 71 and the second constant-pressure water replenishing device can also be replaced by a constant-pressure air replenishing device, which is a device that can replenish gas at a constant pressure, belongs to the prior art, and will not be described in detail here;

[0048] By providing the first constant pressure water replenishing device 71 and the second constant pressure water replenishing device 72, the pressures of the cavities at both ends of the blocked ureter can be directly measured respectively, so as to regulate the amount of injected liquid and gas and ensure that the ureter is expanded to a suitable size.

[0049] Specifically, an annular protrusion 80 is provided on the circumference of the upper balloon 30, the spacer balloon 40, the lower balloon 50 and the bladder balloon 60; the annular protrusion 80 is connected with the corresponding upper balloon 30, the spacer balloon 40, the lower balloon 50 or the bladder balloon 60; when the upper balloon 30, the spacer balloon 40, the lower balloon 50 and the bladder balloon 60 are not expanded, the annular protrusion 80 and the surfaces of the upper balloon 30, the spacer balloon 40, the lower balloon 50 and the bladder balloon 60 are combined into a smooth surface;

[0050] Specifically, the axial direction of the annular protrusion 80 is parallel to the axial direction of the ureteral catheter 10; the annular protrusion 80 on the surface of the bladder balloon 60 is located on a side away from the lower balloon 50;

[0051] By providing the annular protrusion 80, after the upper balloon 30, the spacer balloon 40, and the lower balloon 50 are inflated, the annular protrusion 80 can be used to completely fit with the inner wall of the ureter, acting as a sealing ring to improve its sealing performance and prevent liquid or air from seeping out of the ureter during the process of injecting air or liquid into the blocked ureter; and the bladder balloon 60 can better clamp the bladder neck position between the bladder and the urethra through the annular protrusion 80. Since the annular protrusion 80 on the surface of the bladder balloon 60 is located on the side away from the lower balloon 50, the annular protrusion 80 can be used to clamp the bladder neck position between the bladder and the urethra, avoiding the entire bladder balloon 60 from being blocked in the urethra and causing discomfort to the patient.

[0052] Compared with the prior art, the present invention divides the ureter into two cavities by means of an upper balloon, a spacer balloon and a lower balloon, and injects liquid or gas into the two cavities respectively through the first opening and the second opening; the liquid pressures and the duration of action of the two cavities are different, so as to achieve basically the same expansion effect at one time under the premise that the anatomical and expansion capabilities of different ureteral segments are different.

[0053] The following is a brief supplementary description of the safety of the present invention using liquid and gas to expand the ureter:

[0054] Urology clinicians all know that when a stone blocks the lower ureter, the urine produced by the kidney cannot flow out, and the urine with a certain pressure gathers in the ureter and renal collecting system, which causes the entire ureter, renal pelvis, and renal collecting system (the place in the kidney where urine is collected and discharged) to expand. The expansion is most obvious in the upper ureter, but the lower ureter is also well expanded, rather than the upper ureter being well expanded or interrupted and the lower ureter being slightly expanded or not expanded; or a certain ureter segment or a certain ureter point is bulging and dilated;

[0055] The pressure of the liquid we use to dilate the ureter can be precisely controlled. It can be fixed at a level equivalent to the intrarenal pressure when the ureter is blocked by stones and the kidney cannot produce urine. It can also be set around this pressure; instead of rapidly injecting water in uncontrolled amounts, the pressure in the ureter when water fills the ureter can be measured, and the diameters of the ureters at different locations can also be measured.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A three-balloon ureteral liquid-gas dilation conduit kit, characterized in that: include: A ureteral catheter, wherein one end of the ureteral catheter is provided with a tip drainage opening, and an upper balloon, a spacer balloon and a lower balloon are sequentially arranged at intervals on a side of the ureteral catheter close to the tip drainage opening; a first channel, a second channel, a third channel, a fourth channel, a fifth channel and a sixth channel are sequentially arranged on an end of the ureteral catheter away from the upper balloon; the first channel is communicated with the tip drainage opening, the second channel is communicated with the upper balloon, the third channel is communicated with the spacer balloon; the fourth channel is communicated with the lower balloon; a first opening and a second opening are provided on one side of the ureteral catheter; the first opening is located between the upper balloon and the spacer balloon, and the first opening is communicated with the fifth channel; the second opening is located between the spacer balloon and the lower balloon, and the second opening is communicated with the sixth channel; the first channel coincides with the ureteral catheter; The distance between the spacer balloon and the upper balloon is greater than the distance between the spacer balloon and the lower balloon; the position between the spacer balloon and the upper balloon corresponds to the middle and upper sections of the ureter; the position between the spacer balloon and the lower balloon corresponds to the lower section of the ureter; It also includes a first constant-pressure water replenishing device and a second constant-pressure water replenishing device; The first constant-pressure water replenishing device is connected to the fifth channel; the second constant-pressure water replenishing device is connected to the sixth channel.

2. The three-balloon ureteral liquid-gas dilation conduit kit according to claim 1, characterized in that: A seventh channel is also provided at one end of the ureteral catheter away from the upper balloon; a third opening is also provided at one side of the ureteral catheter; the third opening is located at a side away from the lower balloon, and the third opening is communicated with the seventh channel.

3. The three-balloon ureteral liquid-gas dilation conduit kit according to claim 2, characterized in that: It also includes a bladder balloon; the bladder balloon is used to be placed at the bladder neck of the bladder, and is arranged on the side of the ureteral catheter away from the lower balloon; the end of the ureteral catheter away from the upper balloon is also provided with an eighth channel, and the eighth channel is connected to the bladder balloon; the third opening is located between the lower balloon and the bladder balloon.

4. The three-balloon ureteral liquid-gas dilation conduit kit according to claim 3, characterized in that: The diameter of the ureteral catheter between the upper balloon and the lower balloon is smaller than the diameter of the ureteral catheter between the lower balloon and the bladder balloon.

5. The three-balloon ureteral liquid-gas dilation conduit kit according to claim 4, characterized in that: The diameter of the ureteral catheter is 8Fr-13Fr.

6. The three-balloon ureteral liquid-gas dilation conduit kit according to claim 4, characterized in that: The diameters of the second channel, the third channel, the fourth channel, the fifth channel, the sixth channel, the seventh channel and the eighth channel are 1.5Fr-2Fr.

7. The three-balloon ureteral liquid-gas dilation conduit kit according to claim 4, characterized in that: The upper balloon, the spacer balloon, the lower balloon and the bladder balloon are provided with an annular protrusion on their circumferential sides; the annular protrusion is connected with the corresponding upper balloon, the spacer balloon, the lower balloon or the bladder balloon; when the upper balloon, the spacer balloon, the lower balloon and the bladder balloon are not expanded, the annular protrusion and the surface of the upper balloon, the spacer balloon, the lower balloon or the bladder balloon are combined into a smooth surface.

8. The three-balloon ureteral liquid-gas dilation conduit kit according to claim 7, characterized in that: The axial direction of the annular protrusion is parallel to the axial direction of the ureteral catheter; the annular protrusion on the surface of the bladder balloon is located on the side away from the lower balloon.

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