Ureteral stent tube capable of being taken out without cystoscope and taking-out structure of ureteral stent tube

Abstract

The utility model discloses a cystoscope removal-free ureter inner stent tube and a removal structure thereof, the cystoscope removal-free ureter inner stent tube comprises a ureter stent tube and a guide tube capable of leading out the ureter stent tube from the bladder, the ureter stent tube comprises a first J-shaped head of which one end is arranged at the pelvis and a second J-shaped head of which the other end is arranged in the bladder; the second J-shaped head is provided with the magnetic attraction piece, the end of the guide tube is provided with the magnetic body capable of attracting the magnetic attraction piece, and compared with a traditional secondary taking-out operation of the stent tube in the ureter, the guide tube can rapidly position and attract the second J-shaped head in the bladder, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ureters, in particular to a ureteral stent tube and a removal structure thereof which can be removed without cystoscope. Background Art

[0002] Ureteral stents, also known as double J tubes, are placed in the human ureter, from the renal pelvis to the bladder. They are long and thin tubes used to relieve urinary tract obstruction, support postoperative rehabilitation, treat related diseases, and urgently solve the problem of urinary obstruction, such as kidney stones and ureteral stones surgery, ureteroplasty and repair surgery, and sometimes used to drain hydronephrosis, especially infected hydronephrosis. Ureteral stents temporarily connect the kidney and bladder to ensure that urine in the kidney is discharged into the bladder smoothly. When the patient's ureter returns to normal, a second operation is required to remove the double J tube. This operation generally uses tools such as cystoscopes to enter the bladder through the urethra to guide and pull the lower end of the double J tube. The second operation will increase the pain and inconvenience of postoperative patients, especially for male patients. Due to the long urethra, the operation process needs to be combined with anesthesia to remove the double J tube under cystoscopy. The operation process may cause urethral damage and increase the risk of iatrogenic infection, which brings great pain and discomfort to patients. Secondly, the cost of ordinary tube removal is high, which increases the economic burden of patients and the pressure on medical insurance funds. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a ureteral stent tube and a removal structure thereof that can be removed without cystoscopy, which has the characteristics of convenient removal of the ureteral stent tube and relatively simple operation.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A ureteral stent tube that can be removed without cystoscopy and a removal structure thereof, comprising a ureteral stent tube and a guide tube that can lead the ureteral stent tube out of the bladder, the ureteral stent tube comprising a first J-shaped head with one end arranged on the renal pelvis and a second J-shaped head with the other end arranged in the bladder, the second J-shaped head being provided with a magnetic attraction piece, and a magnetic body that can attract the magnetic attraction piece is provided at the end of the guide tube.

[0006] The magnetic attraction piece is sleeved outside the tube wall of the second J-shaped head.

[0007] The magnetic attraction member includes a metal annular coil, and the metal annular coil is evenly arranged outside the tube wall of the second J-shaped head.

[0008] The outer shell of the metal annular coil is provided with a protective sleeve, and the metal annular coil is sealed and arranged between the protective sleeve and the wall of the second J-shaped head pipe.

[0009] The magnetic body at the end of the guide pipe is an electromagnet, and a wire connected to the electromagnet is arranged on the inner wall of the guide pipe.

[0010] A through hole is arranged on the guide tube located at the lower part of the magnetic body.

[0011] The magnetic attraction component includes a metal head arranged at the second J-shaped head port, and a guide rope is connected between the second J-shaped head and the metal head.

[0012] The guide rope is wound outside the pipe wall of the second J-shaped head, and the guide rope includes a first anchor point with one end fixed at the port of the second J-shaped head and a second anchor point with the other end fixed at the metal head.

[0013] The second J-shaped head is coated with a degradable layer, the guide rope is wound through the degradable layer and bonded to the outside of the tube wall of the second J-shaped head, and the metal head is also bonded and fixed to the port of the second J-shaped head through the degradable layer.

[0014] The second J-type head is made of a material including ferromagnetic material.

[0015] The beneficial effects of the utility model are:

[0016] 1. The ureteral stent is placed in the ureter. In patients with obstructed urinary flow, it is used to assist the kidneys in draining urine to the bladder. After the patient recovers, a guide tube is introduced from the urethra. This guide tube is modified from the existing urinary catheter. A magnetic body is provided at the front end of the guide tube, and the outer surface of the magnetic body is insulated, such as a silicone layer wrapped on the outside. A magnetic suction piece is provided on the second J-shaped head of the ureteral stent. When the guide tube is inserted into the bladder through the urethra, the guide tube acts as a urinary catheter, drains urine and properly empties the bladder, and increases the probability of adsorption between the magnetic body and the magnetic suction piece. When the magnetic body adsorbs the magnetic suction piece, the second J-shaped head adsorbs and fits at the end of the guide tube, and the guide tube gradually withdraws from the urethra and leads out the ureteral stent. Compared with the traditional secondary removal operation of the ureteral stent, the guide tube can quickly locate and adsorb the second J-shaped head in the bladder, which is more convenient and quick. It can be performed in a general clinic, or the internal stent tube can be removed under the guidance of B-ultrasound, shortening the operation time, saving patients from the pain of secondary surgery, and secondly reducing the economic burden of patients and maintaining medical insurance funds.

[0017] 2. The magnetic suction piece is made into several metal ring coils and is evenly wound around the tube wall of the second J-shaped head. On the one hand, it can maintain the original curved shape of the second J-shaped head when in use, preventing the stent tube from being washed into the deep bladder by urine or even moved out of the body when the patient is moving or urinating; on the other hand, when the guide tube absorbs and leads out the second J-shaped head, the second J-shaped head can be deformed and fit at the end position of the guide tube under the action of magnetic force.

[0018] 3. The metal annular coil seal is set between the protective sleeve and the wall of the second J-shaped head tube to avoid direct mechanical stimulation of the metal material on the ureter wall and bladder neck, thereby reducing the patient's discomfort and the occurrence of related complications; on the other hand, it avoids corrosion of the metal material in the urine environment in the bladder.

[0019] 4. The magnetic body can be an electromagnet to obtain a larger magnetic force to adsorb the second J-type head. The electromagnet and the wire are both insulated.

[0020] 5. The magnetic suction piece is made into a metal head shape and is arranged at the port of the second J-type head. The metal head and the port of the second J-type head are connected through a guide rope. The guide rope is wound and fixed outside the tube wall near the port of the second J-type head, and the guide rope and the metal head are kept in their winding and fixed state through the degradable layer. Before the degradable layer dissolves, the ureteral stent tube works normally. After the degradable layer gradually dissolves, the metal head and the guide rope begin to release. The first anchor point and the second anchor point are insoluble, and the metal head maintains the connection state with the second J-type head through the guide rope. When the guide tube enters the bladder, the metal head is adsorbed on the end of the guide tube under the action of magnetic force, and then the metal head is led out, and the ureteral stent tube is pulled out through the metal head. By means of magnetic suction, the metal head can be quickly positioned and adsorbed, and the second J-type head can be guided out more conveniently and quickly, thereby improving the efficiency of removing the ureteral stent tube, shortening the treatment time, and reducing the pain of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a ureteral stent connecting the kidney to the bladder;

[0022] Figure 2 It is a schematic diagram of the structure of the protective cover on the second J-type head;

[0023] Figure 3 It is a schematic diagram of the structure of a metal toroidal coil;

[0024] Figure 4 is a cross-sectional view of the end portion of the guide tube;

[0025] Figure 5 is a schematic diagram of the second J-shaped head being adsorbed and attached to the end of the guide tube;

[0026] Figure 6 This is a schematic diagram of the structure of the metal head and the guide rope on the second J-shaped head;

[0027] Figure 7 It is a schematic diagram of the structure where the guide rope is wound around the second J-shaped head;

[0028] Figure 8 is a schematic diagram of the structure of the degradable layer on the second J-shaped head;

[0029] Fig. 9It is a schematic diagram of the guide tube adsorbing the metal head. DETAILED DESCRIPTION

[0030] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0031] Reference Figure 1-4 The utility model proposes a ureteral stent tube and a removal structure thereof that can be removed without cystoscopy, including an intraureteral stent tube 1 and a guide tube 3 that can lead the intraureteral stent tube 1 out of the bladder. The intraureteral stent tube 1 includes a first J-shaped head 11 with one end arranged in the renal pelvis and a second J-shaped head 10 with the other end arranged in the bladder. The second J-shaped head 10 is provided with a magnetic attraction part 2, and a magnetic body 30 that can attract the magnetic attraction part 2 is provided at the end of the guide tube 3.

[0032] Further, the ureteral stent tube 1 is placed in the ureter, and in patients with obstructed urinary flow, it is used to assist the kidney 5 in draining urine to the bladder 4. After the patient recovers, the guide tube 3 is introduced from the urethra. This guide tube 3 is modified from the existing urinary catheter, and the guide tube 3 is made of sterile silicone or latex material. A magnetic body 30 is arranged at the front end of the guide tube 3, and the outer surface of the magnetic body 30 is insulated, such as being wrapped with a silicone layer on the outside. A magnetic suction piece 2 is arranged on the second J-shaped head 10 of the ureteral stent tube 1. When the guide tube 3 is inserted into the bladder 4 through the urethra, the guide tube 3 acts as a urinary catheter, drains urine and properly empties the bladder 4, and increases the probability of adsorption of the magnetic body 30 and the magnetic suction piece 2. When the magnetic body 30 adsorbs the magnetic suction piece 2, the second J-shaped head 10 adsorbs and fits at the end of the guide tube 3, and the guide tube 3 gradually withdraws from the urethra and leads out the ureteral stent tube 1, and finally until the ureteral stent tube 1 is pulled out of the patient's body. Compared with the traditional secondary removal operation of the ureteral stent tube 1, the guide tube 3 can quickly locate and adsorb the second J-shaped head 10 in the bladder 4, which is more convenient and quick, shortens the operation time, improves the efficiency of medical staff and reduces the patient's discomfort or pain; on the other hand, it also saves surgical expenses.

[0033] refer to Figure 2 or Figure 3The magnetic member 2 is sleeved outside the tube wall of the second J-shaped head 10. Preferably, the magnetic member 2 is a metal annular coil 21, and the metal annular coil 21 is evenly wound outside the tube wall of the second J-shaped head 10, so that the second J-shaped head 10 has a certain deformation ability. The metal annular coil 21 can be selected from a ferromagnetic metal or metal alloy. As another embodiment, the magnetic member 2 can also be designed as a metal spiral coil wound outside the tube wall of the second J-shaped head 10.

[0034] Furthermore, the magnetic attraction component 2 is made into a metal annular coil 21 and is arranged outside the tube wall of the second J-shaped head 10. On the one hand, it can maintain the original curved shape of the second J-shaped head 10 when in use, and prevent the stent tube from being washed into the deep part of the bladder 4 or even moved out of the body by urine when the patient is active or urinating; on the other hand, when the guide tube 3 adsorbs and leads out the second J-shaped head 10, the second J-shaped head 10 can have a certain deformation ability under the action of magnetic force, and it is easier to deform and fit at the end position of the guide tube 3.

[0035] As another embodiment, the outer tube wall of the second J-shaped head 10 is provided with a magnetic attraction member 2 . Meanwhile, ferromagnetic particles are added to the material forming the second J-shaped head 10 to further increase the adsorption force with the magnetic body 30 .

[0036] refer to Figure 2 The metal annular coil 21 is covered with a protective sleeve 20, and the metal annular coil 21 is sealed between the protective sleeve 20 and the tube wall of the second J-shaped head 10, which can avoid direct mechanical stimulation of the metal annular coil 21 on the ureter wall and the bladder neck, thereby alleviating the patient's discomfort and reducing the occurrence of related complications; on the other hand, it avoids corrosion of the metal material in the urine environment.

[0037] Optionally, the magnetic body 30 can be a permanent magnet, such as ferrite, neodymium iron boron, etc.; preferably, the magnetic body 30 at the end of the guide tube 3 is an electromagnet to obtain a larger and controllable magnetic force. A wire 31 connected to the electromagnet is provided on the inner wall of the guide tube 3, and the electromagnet and the wire are both insulated, such as the outer layer is wrapped with insulating paint or insulating silicone.

[0038] refer to Figure 4 A through hole 32 is provided on the guide tube 3 located at the lower part of the magnetic body 30. When the guide tube 3 enters the bladder from the urethra, the through hole 32 is used to divert part of the urine and contract the bladder, so that the end of the guide tube 3 is easier to position and adsorb the second J-shaped head 10.

[0039] refer to Figure 6 , Figure 7As another embodiment, the magnetic attraction member 2 includes a metal head 22 disposed at the end of the second J-shaped head 10, and a guide rope 23 is connected between the second J-shaped head 10 and the metal head 22. The outer surface of the metal head 22 is also provided with an isolation layer, such as a sterile silicone layer.

[0040] refer to Figure 7 The guide rope 23 is wound around the pipe wall of the second J-shaped head 10 , and the guide rope 23 includes a first anchor point 230 fixed at one end at the port of the second J-shaped head 10 and a second anchor point 231 fixed at the other end of the metal head 22 .

[0041] refer to Figure 8 The second J-type head 10 is coated with a degradable layer 232, the guide rope 23 is wound around and bonded to the outside of the tube wall of the second J-type head 10 through the degradable layer 232, and the metal head 22 is also bonded and fixed to the port of the second J-type head 10 through the degradable layer 232. Further, the first anchor point 230 is located as close to the port of the second J-type head 10 as possible, and the winding direction of the guide rope 23 is located in a direction away from the port of the second J-type head 10, so that after the degradable layer 232 is degraded, the guide rope 23 is more easily detached from the second J-type head 10, which has the effect of preventing the guide rope 23 from winding around the second J-type head 10.

[0042] Optionally, the degradable layer 232 is made of medical degradable materials, such as natural degradable polymer biomaterials: proteins (collagen, fibrin, silk, etc.), polysaccharides (starch, alginate, chitin, hyaluronic acid derivatives, etc.), natural polyesters, etc. The degradable layer 232 can be completely degraded after 2-4 weeks. In practice, degradable materials with different degradation cycles can be used according to the condition requirements of different patients.

[0043] refer to Figure 7 The metal head 22 is provided with a guide port 220. When the metal head 22 is bonded and fixed to the port of the second J-shaped head 10, urine is discharged from the guide port 220 without affecting the normal operation of the ureteral stent tube 1.

[0044] The magnetic attraction member 2 is made into a metal head 22 and is arranged at the port of the second J-shaped head 10. The metal head 22 is connected to the port of the second J-shaped head 10 through a guide rope 23. The guide rope 23 is wound and fixed outside the tube wall near the port of the second J-shaped head 10, and the guide rope 23 and the metal head 22 are kept in a wound and fixed state through a degradable layer 232. Before the degradable layer 232 dissolves, the ureteral stent tube 1 works normally. After the degradable layer gradually dissolves, the metal head 22 and the guide rope 23 begin to release, but the first anchor point and the second anchor point are insoluble, and the metal head 22 maintains a connection state with the second J-shaped head 10 through the guide rope 23. When the guide tube 3 enters the bladder 4, the metal head 22 is adsorbed on the end of the guide tube 3 under the action of magnetic force, and then the metal head 22 is drawn out from the bladder 4, and the ureteral stent tube 1 is pulled out through the metal head 22 until the ureteral stent tube 1 is pulled out of the body. By means of magnetic attraction, the metal head 22 is quickly positioned and adsorbed, and the second J-shaped head 10 is conveniently and quickly guided out, thereby improving the efficiency of removing the ureteral stent tube 1, shortening the operation time, and reducing the pain of the patient.

[0045] Furthermore, when the degradable layer 232 is decomposed, the metal head 22 may also be flushed into the deep bladder by urine or even discharged from the urethra when the patient urinates. At this time, the guide tube 3 can be removed from the bladder according to the guidance of the medical staff, thereby eliminating the need for the guide tube 3 to enter the bladder and then pulling out the ureteral stent tube 1, further saving surgical operations and surgical expenses. When inserting the ureteral stent tube 1, different ureteral stent tubes 1 are selected according to the different genders of the patients. The main difference is that the length of the guide rope 23 between the metal head 22 and the second J-shaped head 10 of male patients is 26cm-30cm, and that of female patients is 6-10cm, which ensures that when the metal head 22 is flushed into the deep bladder, it has enough length to be discharged from the body.

Claims

1. A ureteral stent tube and a removal structure thereof for removing without cystoscopy, characterized in that: The invention comprises an intraureteral stent tube (1) and a guide tube (3) capable of leading the intraureteral stent tube (1) out of the bladder, wherein the intraureteral stent tube (1) comprises a first J-shaped head (11) with one end arranged in the renal pelvis and a second J-shaped head (10) with the other end arranged in the bladder, the second J-shaped head (10) being provided with a magnetic attraction component (2), and a magnetic body (30) capable of attracting the magnetic attraction component (2) being provided at the end of the guide tube (3).

2. A ureteral stent tube and a removal structure thereof for removing without cystoscopy according to claim 1, characterized in that: The magnetic attraction member (2) is sleeved outside the tube wall of the second J-shaped head (10).

3. A ureteral stent tube and a removal structure thereof for removing without cystoscopy according to claim 2, characterized in that: The magnetic attraction member (2) comprises a plurality of metal annular coils (21), and the metal annular coils (21) are evenly arranged outside the tube wall of the second J-shaped head (10).

4. A ureteral stent tube and a removal structure thereof for removing without cystoscopy according to claim 3, characterized in that: The metal annular coil (21) is covered with a protective sleeve (20), and the metal annular coil (21) is sealed between the protective sleeve (20) and the pipe wall of the second J-shaped head (10).

5. The ureteral stent tube and its removal structure for cystoscopic removal free according to claim 1, characterized in that: The magnetic body (30) at the end of the guide tube (3) is an electromagnet, and a wire (31) connected to the electromagnet is arranged on the inner wall of the guide tube (3).

6. A ureteral stent tube and a removal structure thereof for removing without cystoscopy according to claim 5, characterized in that: A through hole (32) is provided on the guide tube (3) located at the lower part of the magnetic body (30).

7. A ureteral stent tube and a removal structure thereof for removing without cystoscopy according to claim 1, characterized in that: The magnetic attraction member (2) comprises a metal head (22) arranged at the end of the second J-shaped head (10), and a guide rope (23) is connected between the second J-shaped head (10) and the metal head (22).

8. The ureteral stent tube and its removal structure for removing without cystoscopy according to claim 7, characterized in that: The guide rope (23) is wound around the outside of the pipe wall of the second J-shaped head (10), and the guide rope (23) comprises a first anchor point (230) with one end fixed at the port of the second J-shaped head (10) and a second anchor point (231) with the other end fixed at the metal head (22).

9. A ureteral stent tube and a removal structure thereof for removing without cystoscopy according to claim 8, characterized in that: The second J-shaped head (10) is coated with a degradable layer (232), the guide rope (23) is wound around the degradable layer (232) and bonded to the outside of the tube wall of the second J-shaped head (10), and the metal head (22) is also bonded and fixed at the port of the second J-shaped head (10) through the degradable layer (232).

10. The ureteral stent tube and its removal structure for removing without cystoscopy according to claim 1, characterized in that: The constituent material of the second J-type head (10) includes ferromagnetic material.

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