A ureteral dilation device

Abstract

The present invention relates to a ureteral dilation device, comprising a first tube body and a second tube body; a first end of the first tube body is provided with a first bladder; the first tube body is in communication with the first bladder; a convex portion is provided on the outer side surface of the first tube body; a second end of the first tube body is provided with a water injection channel, an output end of the water injection channel penetrates through the outer side surface of the first tube body, and the output end of the water injection channel is located between the first bladder and the convex portion; a second bladder is provided around the circumference of a first end of the second tube body, and the second tube body is in communication with the second bladder; the first tube body is slidably arranged in the second tube body. In the present invention, by providing a convex portion on the first tube body, the second bladder can quickly reach the position of the convex portion and achieve pre-positioning, avoiding the situation where the second bladder moves to a deeper position, and the convex portion can improve the sealing performance between the first tube body and the second tube body, achieve sealing, and prevent the liquid between the two bladders from flowing out from the gap between the two tubes.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible ureteroscopy surgery, and particularly to a ureteral dilation device. Background Art

[0002] Compared with rigid ureteroscopes, flexible ureteroscopes have the function of being bendable and can handle ureteral stones that ascend along the ureter to the kidney and upper ureteral stones during the lithotripsy process. More and more patients are receiving flexible ureteroscopy surgery. For kidney stones with surgical stone removal indications, percutaneous nephrolithotomy was the absolute mainstream for a quite long time before the development of flexible ureteroscopy technology. Compared with percutaneous nephrolithotomy, flexible ureteroscopy lithotripsy does not require renal puncture, so there is no risk of puncture dilation and renal hemorrhage caused by moving the endoscope body during lithotripsy. With the improvement of flexible ureteroscopy technology and the popularization of this technology, in recent years, more and more kidney stones and upper ureteral stones with not too large a burden and surgical indications have been treated by flexible ureteroscopy. The combination of percutaneous nephrolithotomy and flexible ureteroscopy for removing residual stones is also a research hotspot. For kidney stones with high hardness and unsuccessful extracorporeal shock wave lithotripsy, flexible ureteroscopy lithotripsy has become the first choice.

[0003] In fact, the ureter is an elastic and water-expandable muscular tube with a large passive dilation ability, which can be understood from the ureteral anatomy. Compared with mechanical force dilation of the ureter, water and gas dilation of the ureter are more gentle and uniform. As a urologist, it is very easy to understand that the ureter is dilated by water and its inner diameter increases: when a ureteral stone obstructs the ureter, the part above the obstruction plane of the kidney and ureter is dilated by urine to varying degrees, and even the inner diameter of the ureter exceeds 20 mm. Moreover, most of this dilation is reversible and does not accompany obvious damage to the ureteral anatomical structure and function: after the acute ureteral obstruction is relieved for a period of time, when reexamined by B-ultrasound or angiography, the originally dilated ureter is no longer dilated, the hydronephrosis disappears, and the renal function returns to normal. However, from the following experience, we can understand that in the initial stage after the acute ureteral obstruction is relieved, the ureter still remains in a dilated state: for patients with ureteral stones and renal colic who undergo ureteroscopy lithotripsy, only a spacious ureter is found and no ureteral stone is seen, which means the stone has been discharged. Even after the stone has been discharged, we can still obtain a spacious ureter.

[0004] The project team has applied for a combined ureteral hydraulic dilation conduit kit. By adopting a split first tube body and a second tube body, the first tube body and the second tube body are slidingly arranged with each other, so that the distance between the first balloon body and the second balloon body on the first tube body and the second tube body can be flexibly adjusted, so as to accurately and freely expand a specific section of the ureter as needed; experiments have found that this patent has two disadvantages: 1) The second balloon body is slidably connected to the first tube body, which is easy to form a gap and cannot ensure the sealing of the kit. During the ureteral dilation process, the liquid in the blocked part will easily flow out, and it is difficult to reach a certain threshold pressure, so the ureter will not dilate well; 2) When the second balloon body slides relative to the first tube body, there is no pre-positioning, and it is easy to move to a deeper position or even detach from the first tube body.

[0005] In view of the above disadvantages, the present invention provides a ureteral dilation device. Summary of the invention

[0006] Based on this, the purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and provide a ureteral dilation device.

[0007] A ureteral dilation device comprises a first tube body and a second tube body; a first bag body is provided at a first end of the first tube body; the first tube body is connected to the first bag body; a convex portion is provided on the outer side of the first tube body; a water injection channel is provided at the second end of the first tube body, an output end of the water injection channel passes through the outer side of the first tube body, and the output end of the water injection channel is located between the first bag body and the convex portion;

[0008] A second sac is disposed around the first end of the second tube, and the second tube is connected to the second sac; the first tube is slidably disposed in the second tube.

[0009] Furthermore, the protrusion is circumferentially arranged around the outer side surface of the first tube body; the protrusion is spindle-shaped, and the surface of the protrusion is smoothly transitionally connected to the outer side surface of the first tube body.

[0010] Furthermore, a first channel is provided at the second end of the first tube body; and an output end of the first channel is communicated with the first capsule body.

[0011] Furthermore, a drainage port is provided at the first end of the first tube body; the first capsule is located close to the drainage port; a drainage channel is provided at the second end of the first tube body, and the drainage channel is connected to the drainage port.

[0012] Further, the tube wall thickness of the first end of the first tube body is smaller than the tube wall thickness of the second end of the first tube body.

[0013] Further, a sliding hole is provided in the second tube body along its axial direction, a cavity is provided around the second bladder, and the cavity is coaxially arranged with the sliding hole; the first tube body passes through the cavity and the sliding hole; the diameter of the sliding hole is smaller than the maximum diameter of the convex portion.

[0014] Further, the inner surface of the cavity is in a flared shape, and after the second bladder is filled, the inner surface of the cavity is in close contact with the outer side surface of the convex portion.

[0015] Further, a second channel is provided at the wall of the second end of the second tube body; the second channel is communicated with the second bladder.

[0016] Further, the thickness of the first end of the first bladder is greater than the thickness of the second end of the first bladder; the thickness of the first end of the second bladder is greater than the thickness of the second end of the second bladder.

[0017] A method for using a ureteral dilation device, which uses the above ureteral dilation device for ureteral dilation, includes the following steps:

[0018] Step 1: Place the first tube body and the first bladder into the upper segment of the ureter, inject contrast agent into the drainage channel and flow out from the drainage port, confirm the position of the first bladder in a suitable position by combining with external equipment, and then inject liquid or gas into the first bladder through the first channel to fill the first bladder; the urine produced in the kidney is discharged to the outside of the body through the drainage port and the drainage channel.

[0019] Step 2: Pass the first tube body through the cavity and the sliding hole, and then place the second tube body and the second bladder into the ureter until the second bladder reaches the position of the convex portion and cannot be inserted further; then inject liquid or gas into the second bladder through the second channel to fill the second bladder.

[0020] Step 3: Inject liquid into the water injection channel and expand the ureter.

[0021] Further, before Step 1, first place a super-slippery guide wire into the ureter to ensure that the top of the guide wire reaches the renal collecting system, and then place the first tube body along the super-slippery guide wire.

[0022] After the ureter is expanded in Step 3, draw out the liquid or gas in the second bladder and draw out the second tube body; then draw out the liquid or gas in the first bladder and draw out the first tube body.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The ureteral dilatation device and its usage method described in the present invention adopt a split first tube body and second tube body. The first tube body and the second tube body are slidably arranged relative to each other, and the distance between the first bladder and the second bladder can be flexibly adjusted, so as to accurately and freely dilate a specific segment of the ureter according to needs. Compared with the prior art pipeline kit, the product of this patent has a raised part on the first tube body, enabling the second bladder to quickly reach the position of the raised part and achieve pre-positioning, avoiding the situation where the second bladder moves to a deeper position. Moreover, the raised part is spindle-shaped, which can increase the sealing performance between the first tube body and the second tube body, achieve plugging, prevent the liquid between the two bladders from flowing out through the gap between the two tubes, and avoid the formation of a gap between the two.

[0025] (2) Combined with a contrast agent and external detection equipment, the positions of the first bladder and the second bladder in the ureter can be accurately judged. After the first bladder and the second bladder reach the appropriate positions, they are filled and the ureter is blocked, greatly improving the adaptability of the pipeline kit to the ureters of different patients, saving time and cost, and at the same time avoiding ureteral injuries caused by multiple insertions.

[0026] (3) By setting a hydrostatic pressure measuring device connected to the water injection channel, the pressure of the blocked ureter can be directly measured to regulate the liquid injected into the water injection channel and ensure that the ureter is expanded to an appropriate size.

[0027] (4) By setting a conical drainage opening, it can play a guiding function during the process of inserting the ureteral catheter into the human body, enabling the ureteral catheter to be smoothly inserted into the human body, and at the same time playing a role in protecting the first bladder.

[0028] (5) The wall thickness of the first end of the first tube body is less than the wall thickness of the second end of the first tube body, so that the diameter of the first end of the first tube body is relatively thin, and during the process of inserting it into the ureter, the probability of damage to the upper and middle parts of the ureter is greatly reduced.

[0029] (6) The thickness of the first end of the first bladder is greater than the thickness of the second end of the first bladder; the thickness of the first end of the second bladder is greater than the thickness of the second end of the second bladder. When the first bladder and the second bladder contract, the position with a smaller thickness contracts first, so that the first bladder and the second bladder contract in the same direction, not easily forming a wrinkled surface, maintaining the smoothness of the surfaces of the first tube body and the second tube body, and reducing the damage to the ureteral wall.

[0030] For better understanding and implementation, the present invention will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the ureteral dilatation device of the present invention;

[0032] Figure 2 Schematic diagram of the cooperation after the first bladder and the second bladder of the present invention are filled

[0033] Figure 3 Schematic diagram of the internal structure of the first tube body of the present invention;

[0034] Figure 4 Schematic diagram of the internal structure of the second tube body of the present invention;

[0035] Figure 5 Usage state diagram of the ureteral dilation device of the present invention.

[0036] In the figure: 1, ureter; 10, first tube body; 11, first bladder; 12, convex part; 13, water injection channel; 14, first channel; 15, drainage port; 16, drainage channel; 20, second tube body; 21, second bladder; 211, cavity; 22, sliding hole; 23, second channel. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0038] It should be understood that in the description of the present application, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 to the present application. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, that is, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In addition, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] It should be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "arranged", "connected", "joined", and "hollow" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0040] Please refer to Figures 1 to 5 , Figures 1 through 5 which is only a schematic diagram. The first tube body 10 and the second tube body 20 are slender articles, and the lengths of the first tube body 10 and the second tube body 20 are drawn in an omitted way. A ureteral dilation device in this embodiment includes a first tube body 10 and a second tube body 20;

[0041] Specifically, a first bladder 11 is provided at the first end of the first tube body 10; the first tube body 10 is in communication with the first bladder 11; a convex portion 12 is provided on the outer side surface of the first tube body 10; a water injection channel 13 is provided at the second end of the first tube body 10, and the output end of the water injection channel 13 passes through the outer side surface of the first tube body 10, and the output end of the water injection channel 13 is located between the first bladder 11 and the convex portion 12;

[0042] More specifically, the convex portion 12 is circumferentially arranged around the outer side surface of the first tube body 10; the convex portion 12 is spindle-shaped, and the surface of the convex portion 12 is smoothly and transitionally connected to the outer side surface of the first tube body 10;

[0043] More specifically, a first channel 14 is provided at the second end of the first tube body 10; the output end of the first channel 14 is in communication with the first bladder 11;

[0044] More specifically, a drainage port 15 is provided at the first end of the first tube body 10; the first bladder 11 is located near the drainage port 15; a drainage channel 16 is provided at the second end of the first tube body 10, and the drainage channel 16 is in communication with the drainage port 15; the drainage port 15 is preferably conical; by providing the conical drainage port 15, it can play a guiding function during the process of inserting the ureteral 1 catheter into the human body, enabling the ureteral 1 catheter to be smoothly inserted into the human body, and at the same time, it also plays a role in protecting the first bladder 11;

[0045] More specifically, the wall thickness of the first end of the first tube body 10 is less than that of the second end of the first tube body 10; the wall thickness of the first end of the first tube body 10 is less than that of the second end of the first tube body 10, such that the diameter of the first end of the first tube body 10 is relatively thin, and during the process of inserting it into the ureter 1, the probability of damaging the upper part of the ureter 1 is greatly reduced.

[0046] Specifically, a second bladder 21 is provided around the circumference of the first end of the second tube body 20, and the second tube body 20 communicates with the second bladder 21; the first tube body 10 is slidably disposed within the second tube body 20;

[0047] More specifically, a sliding hole 22 is provided along the axial direction of the second tube body 20, and a cavity 211 is provided around the second bladder 21, and the cavity 211 is coaxially disposed with the sliding hole 22; the first tube body 10 passes through the sliding hole 22; the diameter of the sliding hole 22 is less than the maximum diameter of the convex portion 12; the inner surface of the cavity 211 is in a flared shape or a wine glass shape, so that the shape of the inner surface of the cavity 211 matches the outer side shape of the convex portion 12. After the second bladder 21 is filled, the inner surface of the cavity 211 can better adhere to the outer side surface of the convex portion 12; preferably, the material of the convex portion 12 can be a compressible material with certain elasticity, so as to improve the sealing performance between the convex portion 12 and the second bladder 21 after the second bladder 21 is filled.

[0048] More specifically, a second channel 23 is provided at the wall of the second end of the second tube body 20; the second channel 23 communicates with the second bladder 21.

[0049] In the preferred embodiment of the present invention, the first bladder 11 and the second bladder 21 are in an annular tubular shape; the thickness of the first end of the first bladder 11 is greater than that of the second end of the first bladder 11; the thickness of the first end of the second bladder 21 is greater than that of the second end of the second bladder 21; the thickness of the first end of the first bladder 11 is greater than that of the second end of the first bladder 11; the thickness of the first end of the second bladder 21 is greater than that of the second end of the second bladder 21, so that during the contraction process of the first bladder 11 and the second bladder 21, the position with a smaller thickness contracts first, and thus the first bladder 11 and the second bladder 21 contract in the same direction, and it is not easy to form a wrinkled surface, maintaining the smoothness of the surfaces of the first tube body 10 and the second tube body 20 and reducing the damage to the wall of the ureter 1.

[0050] In the preferred embodiment of the present invention, a hydrostatic pressure measuring device (not shown in the figure) is further included; the hydrostatic pressure measuring device is connected to the water injection channel 13; the hydrostatic pressure measuring device can preferably be a constant pressure pump. More specifically, the constant pressure pump can be a water injection pump or a liquid injection pump with controllable and set pressure.

[0051] The usage method of the ureter 1 dilation device of this embodiment is to use the above-mentioned ureter 1 dilation device to dilate the ureter 1, including the following steps:

[0052] Step 1: Place the first tube body 10 and the first bladder 11 into the upper segment of the ureter 1. Inject a contrast agent into the drainage channel 16 and let it flow out from the drainage opening 15. Combine with an external device (not shown in the figure) to confirm that the first bladder 11 is in a suitable position. Then, inject liquid or gas into the first bladder 11 through the first channel 14 to make the first bladder 11 full; the urine produced in the kidney is discharged to the outside through the drainage opening 15 and the drainage channel 16.

[0053] Step 2: Pass the first tube body 10 through the cavity 211 and the sliding hole 22, and then place the second tube body 20 and the second bladder 21 into the ureter 1 until the second bladder 21 reaches the position of the convex part 12 and can no longer be inserted; then, inject liquid or gas into the second bladder 21 through the second channel 23 to make the second bladder 21 full; the inner side surface of the second bladder 21 is closely attached to the outer wall of the convex part 12, and then the gap between the inner wall of the second bladder 21 and the outer wall of the first tube body 10 can be sealed to avoid water leakage.

[0054] Step 3: Inject liquid, such as sterile saline isotonic with urine, into the water injection channel 13 through a syringe with a pressure pump, and maintain a constant pressure to dilate the ureter 1 between the first bladder 11 and the second bladder 21; after dilating for a period of time, draw out the liquid or gas in the second bladder 21, and then draw out the second tube body 20; then draw out the liquid or gas in the first bladder 11 and draw out the first tube body 10.

[0055] Finally, after the entire target segment of the ureter 1 is fully dilated, a sheath can be placed for ureteroscopy lithotripsy.

[0056] In the preferred embodiment of this invention, before step 1, a super-slippery guide wire (not shown in the figure) is first placed into the ureter 1 to ensure that the top of the guide wire reaches the renal collecting system, and then the first tube body 10 and the first bladder 11 are placed into the ureter 1 along the super-slippery guide wire.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] (1) The ureteral dilation device and its usage method according to the present invention adopt a split first tube body and second tube body. The first tube body and the second tube body are slidably arranged relative to each other, and the distance between the first bladder and the second bladder can be flexibly adjusted, so as to accurately and freely dilate a specific segment of the ureter as needed. Compared with the prior art pipeline kit, in this patented product, a convex part is provided on the first tube body, enabling the second bladder to quickly reach the position of the convex part and achieve pre-positioning, avoiding the situation where the second bladder moves to a deeper position. Moreover, the convex part is spindle-shaped, which can increase the sealing performance between the first tube body and the second tube body, avoiding the formation of a gap between the two.

[0059] (2) In combination with a contrast agent and an external detection device, the positions of the first bladder and the second bladder in the ureter can be accurately judged. After the first bladder and the second bladder reach the appropriate positions, they are filled and the ureter is blocked, greatly improving the adaptability of the pipeline kit to the ureters of different patients, saving time and cost, and at the same time avoiding ureteral injuries caused by multiple insertions.

[0060] (3) By setting a hydrostatic pressure measuring device connected to the water injection channel, the pressure of the blocked ureter can be directly measured to regulate the liquid injected into the water injection channel and ensure that the ureter is expanded to an appropriate size.

[0061] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A ureteral dilatation device, characterized in that, Comprising: A first tube body, a first bladder is provided at the first end of the first tube body; the first tube body is in communication with the first bladder; a convex portion is provided on the outer side surface of the first tube body; the convex portion is circumferentially arranged around the outer side surface of the first tube body and is spindle-shaped, and the surface of the convex portion is smoothly connected to the outer side surface of the first tube body; a water injection channel is provided at the second end of the first tube body, and the output end of the water injection channel penetrates through the outer side surface of the first tube body, and the output end of the water injection channel is located between the first bladder and the convex portion; A second tube body, a second bladder is provided around the circumference of the first end of the second tube body, and the second tube body is in communication with the second bladder; the first tube body is slidably arranged in the second tube body; A sliding hole is provided along the axial direction of the second tube body, and a cavity with a flared inner surface is provided around the second bladder, and the cavity is coaxially arranged with the sliding hole; after the second bladder is filled, the inner surface of the cavity is in close contact with the outer side surface of the convex portion; the first tube body passes through the cavity and the sliding hole; the diameter of the sliding hole is smaller than the maximum diameter of the convex portion.

2. The ureteral dilation device according to claim 1, wherein A drainage port is provided at the first end of the first tube body; the first bladder is located near the drainage port; a drainage channel is provided at the second end of the first tube body, and the drainage channel is in communication with the drainage port.

3. The ureteral dilation device according to claim 1, characterized in that, The wall thickness of the first end of the first tube body is smaller than the wall thickness of the second end of the first tube body.

4. The ureteral dilation device according to claim 1, characterized in that A first channel is provided at the second end of the first tube body; the output end of the first channel is in communication with the first bladder; a second channel is provided at the second end wall of the second tube body; the second channel is in communication with the second bladder.

5. The ureteral dilatation device according to claim 1, wherein The thickness of the first end of the first bladder is greater than the thickness of the second end of the first bladder; the thickness of the first end of the second bladder is greater than the thickness of the second end of the second bladder.

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