CN112426616A

CN112426616A - Special ureteral stent for kidney transplantation

Info

Publication number: CN112426616A
Application number: CN202011407678.3A
Authority: CN
Inventors: 杨璟辉; 王立明; 傅尚希; 鲍海力
Original assignee: Shanghai Changzheng Hospital
Current assignee: Shanghai Changzheng Hospital
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-03-02

Abstract

The invention discloses a special ureteral stent for kidney transplantation, which comprises a stent body, a first curled tube, a tube opening, an intercepting tube, a second curled tube, a catheter, a bent guide wire, a through hole, a protrusion, an intercepting tube wall, a limiting block, a rubber ring, a round hole, an intercepting cavity, a water blocking ball, an installation cap and an elastic support body. The bent guide wire is made of a plastic material, so that the second curled tube can be conveniently and stably fixed in a renal pelvis for transplanting a kidney, the protrusions are all rubber protrusions, and therefore, particles of calculi can be blocked by the rubber protrusions, the stent body is made of a medical silica gel material, the water blocking ball is matched with the round hole, the diameter of the water blocking ball is larger than the maximum diameter of the round hole, the phenomenon of urine backflow is conveniently prevented, the smooth inner surface is conveniently provided for the ureteral stent, so that the smooth passing of fluid is facilitated, and the smoothness of the inner cavity of the ureteral stent body is improved.

Description

Special ureteral stent for kidney transplantation

Technical Field

The invention relates to a ureteral stent, in particular to a special ureteral stent for kidney transplantation, and belongs to the technical field of medical equipment.

Background

The ureteral stent is an indispensable medical consumable in urology surgery, has extremely wide application in the field of urology surgery, is a common technical tool in the treatment process of various benign and malignant urinary system diseases, and is mainly suitable for the operation process of operations such as urinary calculus, benign and malignant tumors of the urinary system, hydronephrosis, kidney transplantation and the like. Kidney transplantation refers to a treatment method for surgically transplanting a healthy donor kidney to a recipient with renal disorder or renal function loss, and with the progress of transplantation technology, the number of kidney transplantation surgeries is increasing year by year, which is promising for many patients with end-stage renal disease. In addition to the necessary anastomosis of the renal artery and vein vessels, ureteral reconstruction is also required in renal transplantation, and ureteral stents are often required to be placed in the ureteral reconstruction process, which is important for reducing the occurrence of complications after renal transplantation, especially ureteral stenosis. Ureteral stenosis is one of the most common complications after renal transplantation, and is liable to cause damage of transplanted kidney function and increase the risk of loss of transplanted kidney, so that a ureteral stent is often required to be kept for a long time after renal transplantation to maintain the patency of ureter.

At present, no ureteral stent specially applied to kidney transplantation operation exists in clinic, and the most used ureteral stent comprises a double J tube, a metal stent and the like, but the stents all have the following defects:

1) the risk of stenosis and bleeding can be reduced after the insertion of the ureteral stent after the kidney transplant recipient is operated, but there is also a problem that the current clinically-used stent basically belongs to the siphunculus. An anti-reflux mechanism exists from a ureter to a bladder section in a normal human body, the anti-reflux structure is damaged after the ureter stent is placed in the normal human body, the pressure in the bladder is suddenly increased when a patient urinates or holds the urine, the urine flows back to the kidney, so that lumbago of the patient is caused, the risk of early urinary tract infection is increased, and the recovery after renal transplantation is influenced;

2) the ureteral stent usually needs to be placed for a long time after kidney transplantation, but the existing ureteral stent material often forms small stones on the outer tube wall of the ureter after being placed for a long time in a human body, even stone packages appear, so that the ureteral stent is difficult to pull out, or residual small stones cannot be pulled out together with the stent when the stent is pulled out and are left in the ureter, and secondary ureteral obstruction and urinary tract infection are caused.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a ureteral stent dedicated to kidney transplantation.

The invention realizes the purpose through the following technical scheme: a ureter stent special for kidney transplantation comprises a stent body, a first curled tube, a tube opening, an intercepting tube, a second curled tube, a catheter, a bent guide wire, a through hole, a bulge, an intercepting tube wall, a limiting block, a rubber ring, a round hole, an intercepting cavity, a water blocking ball, an installation cap and an elastic support body; the device comprises a support body, a first curled pipe and a second curled pipe, wherein the support body, the first curled pipe and the second curled pipe form a main body structure of the device, one end of the support body is fixedly connected with the first curled pipe, the end part of the first curled pipe is provided with a pipe orifice, one end of the pipe orifice, which is far away from the first curled pipe, is fixedly connected with an intercepting pipe, the intercepting pipe comprises an intercepting pipe wall, two sides of the intercepting pipe wall are fixedly provided with limiting blocks, one side of each limiting block is provided with a rubber ring fixedly connected to the inner side of the intercepting pipe wall, the center position of each rubber ring is provided with a round hole, the limiting blocks and the rubber rings jointly form an intercepting cavity, a water blocking ball is arranged in the intercepting cavity, one end of the support body, which is far away from the first curled pipe, is fixedly connected with the second curled pipe, the inner part of the second curled pipe is provided with a bent guide wire, the support is characterized in that bulges are arranged on the outer walls of the two sides of the support body, through holes are further formed in the support body, and an elastic support body is fixedly arranged inside the support body.

Preferably, in order to facilitate that the second crimping tube can be stably arranged in the renal pelvis of the patient, the second crimping tube is prevented from sliding out of the renal pelvis of the patient, a certain limiting effect is achieved, and the bending guide wire is made of a plastic material.

Preferably, in order to clear up remaining calculus granule through this bellied effect of blockking of rubber when the support body is taken out to make calculus clear up more thoroughly, the arch is the rubber bulge, is provided with a plurality of, and is located the outside of support body.

Preferably, in order to support the support body conveniently, prevent that in the in-service use process, because the patient sits down, lies down the action such as can lateral extrusion support body, cause the support body to be extruded and narrow or block up, the support body is made by medical silica gel material, and the inside elastic support body that sets up of support body is arranged by the superpose of a plurality of plastics winding silk to be formed, and be spiral helicine structure.

Preferably, in order to facilitate the phenomenon of preventing urine reflux, play certain degree guard action to human kidney, hinder water ball and round hole and match each other, hinder water ball diameter and be greater than the maximum distance between two symmetrical stopper, the diameter that hinders water ball is greater than the maximum diameter of round hole.

Preferably, in order to provide a smooth inner surface for the ureteral stent, so as to facilitate smooth passage of fluid and improve the patency of the inner cavity of the ureteral stent, a smooth layer is arranged inside the stent body.

The invention has the beneficial effects that: the ureteral stent special for kidney transplantation is reasonable in design, the bent guide wire is made of plastic materials, the second crimping tube can be stably arranged in the renal pelvis of a patient conveniently, the second crimping tube is prevented from sliding out of the renal pelvis of the patient and plays a certain limiting role, the protrusions are rubber protrusions and are arranged in a plurality of numbers and are positioned on the outer side of the stent body, when the stent body is taken out, residual stone particles can be cleaned through the rubber protrusions on the outer side, the possibility of residual stones is reduced, the stent body is made of medical silica gel materials, an elastic support body arranged inside the stent body is formed by overlapping and arranging a plurality of plastic winding wires and is of a spiral structure, the stent body is conveniently supported, the problem that the stent body is extruded and narrowed or blocked due to the fact that the stent body is extruded laterally under actions of sitting, lying and the like of the patient in the actual use process is solved, the ball that blocks water matches each other with the round hole, and the ball diameter that blocks water is greater than the maximum distance between two symmetry stoppers, and the diameter that blocks water the ball is greater than the maximum diameter of round hole, is convenient for prevent to take place the phenomenon of urine reflux, plays certain degree guard action to the human kidney, and the inside of support body is provided with the glossy layer, is convenient for provide glossy internal surface for ureteral stent, and then is convenient for fluid smooth and easy passing through, improves the patency of ureteral stent body inner chamber.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic view of the internal structure of the intercepting tube of the present invention;

FIG. 4 is a schematic view of the internal structure of the stent body according to the present invention.

In the figure: 1. the support comprises a support body, 2, a first curled pipe, 3, a pipe orifice, 4, an intercepting pipe, 5, a second curled pipe, 6, a guide pipe, 7, a bent guide wire, 8, a through hole, 9, a protrusion, 10, an intercepting pipe wall, 11, a limiting block, 12, a rubber ring, 13, a round hole, 14, an intercepting cavity, 15, a water blocking ball, 16, an installation cap, 17 and an elastic support body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a ureteral stent special for kidney transplantation comprises a stent body 1, a first curled tube 2, a tube opening 3, an intercepting tube 4, a second curled tube 5, a catheter 6, a curved guide wire 7, a through hole 8, a protrusion 9, an intercepting tube wall 10, a limiting block 11, a rubber ring 12, a round hole 13, an intercepting cavity 14, a water blocking ball 15, an installation cap 16 and an elastic support body 17; the support body 1, the first curled tube 2 and the second curled tube 5 form a main body structure of the device, one end of the support body 1 is fixedly connected with the first curled tube 2, the end part of the first curled tube 2 is provided with a tube orifice 3, one end of the tube orifice 3, which is far away from the first curled tube 2, is fixedly connected with a cut-off tube 4, the cut-off tube 4 comprises a cut-off tube wall 10, two sides of the cut-off tube wall 10 are fixedly provided with limiting blocks 11, one side of each limiting block 11 is provided with a rubber ring 12 which is fixedly connected with the inner side of the cut-off tube wall 10, the center of the rubber ring 12 is provided with a round hole 13, the limiting blocks 11 and the rubber ring 12 form a cut-off cavity 14 together, a water blocking ball 15 is arranged inside the cut-off cavity 14, one end of the support body 1, which is far away from the first curled tube 2, is fixedly connected with the second curled tube 5, a bent guide wire 7 is arranged inside, one side fixed mounting that the two 5 of curly pipe were kept away from to mounting cap 16 has pipe 6, be provided with arch 9 on the both sides outer wall of support body 1, and still be provided with through-hole 8 on the support body 1, the inside fixed mounting of support body 1 has elastic support body 17.

The bent guide wire 7 is made of plastic materials, so that the second crimping tube 5 can be stably arranged in the renal pelvis of a patient to prevent the second crimping tube 5 from sliding out of the renal pelvis of the patient to play a certain limiting role, the bulges 9 are all rubber bulges and are provided with a plurality of parts and positioned on the outer side of the support body 1, when the support body 1 is taken out, residual stone particles can be cleaned through the blocking effect of the rubber bulges, so that the stone is cleaned more thoroughly, the support body 1 is made of medical silica gel materials, and the elastic support body 17 arranged in the support body 1 is formed by superposing a plurality of plastic winding wires and is of a spiral structure, so that the support body 1 is conveniently supported to prevent the support body 1 from being extruded and narrowed or blocked due to the fact that the support body 1 is laterally extruded by actions of sitting down, lying down and the like of the patient in the actual use process, hinder water ball 15 and round hole 13 and match each other, hinder water ball 15 diameter and be greater than the maximum distance between two symmetry stoppers 11, hinder water ball 15's diameter and be greater than the maximum diameter of round hole 13 to prevent the phenomenon that takes place the urine reflux, play certain degree guard action to supplying the kidney, the inside of support body 1 is provided with the glossy layer, is convenient for provide glossy internal surface for ureteral stent, and then is convenient for fluid smooth and easy the passing through, improves ureteral stent body inner chamber's unobstructed nature.

The working principle is as follows: when the special ureteral stent for kidney transplantation is used, an operator places the disinfected ureteral stent body 1 in a ureter of a transplanted kidney through an anastomotic stoma, after the installation is finished, when urine flows to the bladder direction from the kidney, the water blocking ball 15 moves to the direction of the limiting block 11 under the pushing action of the urine, at the moment, the ureteral stent body 1 is a through pipe, and the urine can smoothly flow to the bladder from the kidney; when the patient is holding back urine, the urine can take place to flow backward, and the ball 15 that blocks water moves to the direction of rubber ring 12 under the pushing action of the urine that flows backward, makes the ball 15 that blocks water plug up round hole 14, and ureter support body 1 at this moment is the closed tube, and the urine of flowing backward can not flow backward to the kidney from the bladder, when the user used this support tube, can avoid taking place the phenomenon that the urine flows backward, plays the guard action of certain degree to transplanting the kidney.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a special ureteral stent is transplanted to kidney which characterized in that: the device comprises a bracket body (1), a first curled pipe (2), a pipe orifice (3), an intercepting pipe (4), a second curled pipe (5), a guide pipe (6), a bent guide wire (7), a through hole (8), a bulge (9), an intercepting pipe wall (10), a limiting block (11), a rubber ring (12), a round hole (13), an intercepting cavity (14), a water blocking ball (15), an installation cap (16) and an elastic supporting body (17); the support comprises a support body (1), a first curled pipe (2) and a second curled pipe (5) which form the main structure of the device, wherein one end of the support body (1) is fixedly connected with the first curled pipe (2), the end part of the first curled pipe (2) is provided with a pipe orifice (3), one end, far away from the first curled pipe (2), of the pipe orifice (3) is fixedly connected with a cut-off pipe (4), the cut-off pipe (4) comprises a cut-off pipe wall (10), limiting blocks (11) are fixedly mounted on two sides of the cut-off pipe wall (10), one side of each limiting block (11) is provided with a rubber ring (12) fixedly connected to the inner side of the cut-off pipe wall (10), a round hole (13) is formed in the center position of each rubber ring (12), each limiting block (11) and the rubber ring (12) jointly form a cut-off cavity (14), a water blocking ball (15) is arranged inside the cut-off cavity (14), and one end, far away from the first curled pipe (2), of the, the utility model discloses a support, including the support body, the inside of curly pipe two (5) is provided with crooked seal wire (7), and the front end fixedly connected with installation cap (16) of curly pipe two (5), one side fixed mounting that curly pipe two (5) were kept away from in installation cap (16) has pipe (6), be provided with arch (9) on the both sides outer wall of support body (1), and still be provided with through-hole (8) on support body (1), the inside fixed mounting of support body (1) has elastic support body (17).

2. The ureteral stent special for kidney transplantation according to claim 1, wherein: the bent guide wire (7) is made of plastic materials.

3. The ureteral stent special for kidney transplantation according to claim 1, wherein: the bulges (9) are all rubber bulges, are provided with a plurality of and are positioned on the outer side of the bracket body (1).

4. The ureteral stent special for kidney transplantation according to claim 1 or 2, wherein: the support body (1) is made of medical silica gel materials, and an elastic support body (17) arranged inside the support body (1) is formed by superposing and arranging a plurality of plastic winding wires and is of a spiral structure.

5. The ureteral stent special for kidney transplantation according to claim 4, wherein: the water blocking ball (15) is matched with the round hole (13), the diameter of the water blocking ball (15) is larger than the maximum distance between the two symmetrical limiting blocks (11), and the diameter of the water blocking ball (15) is larger than the maximum diameter of the round hole (13).

6. The ureteral stent special for kidney transplantation according to claim 5, wherein: the support is characterized in that a smooth layer is arranged inside the support body (1).