Bladder stabilizing device for radiotherapy

Abstract

The invention discloses a bladder stabilizing device for radiotherapy, and relates to the technical field of radiotherapy. The device specifically comprises a pipeline and a water bag, the pipeline is provided with a first channel used for conveying water to the water bag, and areas with different elasticity are arranged on the surface of the water bag and used for forming a concave area on the surface after the water bag is filled with water. The bladder is supported by the built-in water bag, so that the volume of the bladder is kept stable. Even if the kidney continuously generates urine and the urine flows into the bladder, the newly generated urine can be contained in the concave area on the surface of the water bag, so that the change of the volume of the bladder is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radiotherapy technology, and particularly provides a bladder stabilizing device for radiotherapy. BACKGROUND

[0002] As a new type of medical accelerator, the magnetic resonance accelerator integrates a 1.5T diagnostic level magnetic resonance imaging system and a 7MV linear accelerator, can realize excellent soft tissue contrast imaging under non-radiation conditions, supports adaptive plan adjustment based on real-time images before each treatment, improves treatment effect and reduces toxic side reactions, and simultaneously monitors the whole treatment process to ensure accurate target coverage and protection of organs at risk.

[0003] During the treatment of pelvic tumors in the system, multiple MRI image acquisition by technicians, online modification of the target area by physicians, and online planning by physicists are required, and the patient must maintain a long time of bladder fullness. This state is of great significance: it can not only reduce the dose of the bladder itself and maintain the relative position stability of the bladder and the target area, but also help to push the small intestine and other organs at risk away from the irradiation field to reduce their dose. However, long-term bladder fullness can significantly reduce patient comfort and tolerance, and even cause some patients to be unable to complete the treatment. In addition, as the treatment time increases, the volume of the bladder gradually increases, and the change in its shape may affect the position accuracy of the target area and organs at risk (OAR), not only increasing the risk of radiation toxicity of OAR, but also reducing the coverage rate of the target area prescription dose.

[0004] The current conventional method is to ask the patient to drink water before scanning to make the bladder full, reduce the volume change after the target area is determined, and improve the accuracy of radiotherapy. Although this method can generally maintain bladder fullness, it cannot achieve precise control: on the one hand, there are significant individual differences in the bladder filling rate and urine production rate after the patient drinks water; on the other hand, the bladder volume is also easily affected by factors such as water metabolism, diet, and kidney function status on the same day, resulting in uncontrollable changes in the bladder volume during radiotherapy, which affects the treatment effect.

[0005] The use of a urinary catheter can accurately regulate the liquid capacity in the bladder, ensure the stability of the bladder volume during treatment, reduce the impact on the positioning of the target area, and at the same time avoid patient discomfort and treatment interruption caused by excessive bladder distension, thereby improving the treatment completion rate. With the help of multiple MR image monitoring of the bladder volume consistency during treatment, not only can the accuracy of radiotherapy be improved and the risk of irradiation of organs at risk be reduced, but also the target area can be reduced in size, the dose can be more concentrated in the tumor area, unnecessary irradiation of healthy tissues can be avoided, and ultimately the safety and efficacy of treatment can be improved. SUMMARY

[0006] The present application provides a bladder stabilizing device for radiotherapy, which solves the problem of inability to accurately control the bladder volume of a patient in the prior art of radiotherapy.

[0007] The technical scheme of the present application is as follows:

[0008] A bladder stabilizing device for radiotherapy, comprising a pipe and a water bag, the pipe is provided with a first channel for water supply to the water bag, and the surface of the water bag is provided with areas with different elasticity for forming recessed areas on the surface after the water bag is filled with water.

[0009] In the present scheme, one end of the pipe can be inserted into the bladder, and then the water bag is filled with water through the first channel, and the volume of the water filled can be accurately controlled, so as to accurately control the volume of the water bag and accurately control the volume of the bladder. When urine enters the bladder, because there are recessed areas on the surface of the water bag, the urine can be collected in the recessed areas, and there will be space between the recessed areas and the bladder wall, so that the collection of urine will not cause the bladder to be enlarged by urine, and the problem that the volume of the bladder is difficult to control due to the entry of urine into the bladder can be avoided.

[0010] In order to solve the problem that the patient generates a large amount of urine and the recessed area cannot be contained, resulting in the bladder being continuously enlarged, the pipe is also provided with a second channel, the second channel is connected between the two ends of the pipe, the recessed area is connected with the second channel, and the second channel is used for discharging urine.

[0011] In the present scheme, the urine can be discharged from the second channel, and the recessed area at this time serves as a channel for the flow of urine, for guiding the urine to the second channel for discharge, solving the problem that the bladder is enlarged due to the fullness of the recessed area with urine.

[0012] Preferably, the surface of the water bag is provided with elastic wires, and the elastic wires are elongated and give the water bag an inward pressure in the water-filled state of the water bag, so that the recessed areas are formed on the surface of the water bag.

[0013] In the present scheme, the elastic wires can be fixed to the surface of the water bag by pasting, so as to facilitate the formation of areas with different elasticity on the surface of the water bag.

[0014] Preferably, the elastic wires cross each other to form a wire mesh, and the wire mesh is covered on the surface of the water bag.

[0015] In the present scheme, the wire mesh can connect the recessed areas on the surface of the water bag with each other, because the angle position of the water bag after entering is different, it is difficult to determine the position of the recessed area, in order to avoid the surface of the water bag being attached to the bladder wall and preventing the flow of urine, therefore, by connecting the recessed areas formed by the wire mesh with each other, it can be ensured that the urine can be dispersed to each recessed area, so that each recessed area can be used to contain urine, and the capacity of urine can be improved.

[0016] Preferably, the water bag is provided with a constraint wire inside, and the two ends of the constraint wire are connected with the inner side wall of the water bag.

[0017] In the scheme, the constraint line is located inside the water bag, and when the water bag is inflated by water, the side wall of the water bag can be pulled inward, so as to form a concave area on the surface of the water bag.

[0018] Preferably, the side wall of the pipeline is provided with a through hole, and the through hole is communicated with the second channel.

[0019] In the scheme, when the water bag is inflated, the end surface of the pipeline can be closed by the water bag, so that the urine cannot enter the second channel from the end surface of the pipeline, at this time, the through hole of the side wall can be used for the urine to enter, so that the urine can enter the second channel from the through hole and be discharged.

[0020] Preferably, the pipeline comprises an outer pipe and an inner pipe, the inner pipe is inserted into the outer pipe, the first channel is a hole of the inner pipe, and the second channel is an annular space between the outer pipe and the inner pipe.

[0021] In the scheme, the first channel and the second channel are assembled by the inner pipe and the outer pipe, so that the pipeline including two channels inside does not need to be manufactured, and the cost is easy to control.

[0022] Preferably, an end of the outer pipe away from the water bag is provided with a branch pipe, the inner pipe is inserted into the outer pipe from the branch pipe, and the inner pipe is in interference fit with the branch pipe.

[0023] In the scheme, the water bag can be moved towards the inner pipe by pulling the inner pipe, so that the water bag is received into the outer pipe, the water bag is easy to take out, and the urethra is prevented from being scratched when the water bag is taken out.

[0024] Preferably, an end of the inner pipe located outside the outer pipe is provided with a stop valve.

[0025] In the scheme, the stop valve is arranged, liquid in the water bag is prevented from flowing outwards, and the syringe is prevented from continuously inputting liquid into the water bag, so that the volume of the water bag is accurately controlled.

[0026] Preferably, one end of the inner pipe is inserted into the water bag, and the side wall of the inner pipe in the water bag is provided with a drain hole.

[0027] In the scheme, even if the end of the water bag close to the outer pipe is contracted, the drainage of the water bag is not blocked, and the liquid in the water bag is easy to drain.

[0028] The beneficial effects of the present application are as follows:

[0029] The present application can support the bladder by the water bag, so that the volume of the bladder remains unchanged, and even if the bladder newly enters urine, the urine can be accommodated in the concave area on the surface of the water bag, so that the newly generated urine does not affect the volume of the bladder. BRIEF DESCRIPTION OF DRAWINGS

[0030] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a cross-sectional view of Embodiment 1;

[0032] Figure 2 This is a bottom view of Embodiment 1;

[0033] Figure 3 This is a cross-sectional view of Example 2;

[0034] Figure 4 This is a cross-sectional view of another embodiment of Example 2;

[0035] Figure 5 This is a cross-sectional view of a connection structure between the inner and outer tubes in Embodiment 2;

[0036] Figure 6 This is a cross-sectional view of another connection structure between the inner and outer tubes in Embodiment 2.

[0037] In the above figures, the corresponding reference numerals are as follows:

[0038] 1. Water bladder; 2. Depressed area; 3. Pipe; 4. First channel; 5. Constraint line; 6. Rib line; 7. Second channel; 8. Through hole; 9. Branch pipe; 31. Inner pipe; 32. Outer pipe. Detailed Implementation

[0039] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific embodiments of the present invention.

[0040] Example 1:

[0041] like Figure 1 As shown, this embodiment provides a bladder stabilization device for radiotherapy, including a conduit 3 and a water-filled balloon 1. A first channel 4 is provided within the conduit 3, and one end of the first channel 4 is connected to the water-filled balloon 1. Liquid can be introduced into the water-filled balloon 1 through the first channel 4, causing the balloon 1 to inflate. The water-filled balloon 1 is made of an elastic material, giving its surface elasticity. The surface of the water-filled balloon 1 has regions with varying elasticity. After the water-filled balloon 1 inflates with water, due to these varying elasticities, the deformation at different points on the surface of the water-filled balloon 1 will differ, thus forming a concave region 2 on the surface of the water-filled balloon 1. A gap exists between the concave region 2 and the inner wall of the bladder. When urine enters the bladder, the urine flows into the concave region 2. When the volume of urine entering the bladder is less than the volume of the concave region 2, the urine entering the bladder will not cause the bladder to expand.

[0042] To make the surface of the water bag 1 form the recessed area 2, different fabrics can be sewn to form the water bag 1.

[0043] Or as shown in the figure, the water bag 1 is provided with a reinforcing line 6, and the reinforcing line 6 is fixed to the surface of the water bag 1 by means of glue. The reinforcing line 6 itself has elasticity, but the elasticity of the reinforcing line 6 provides resistance to the deformation of the position where the reinforcing line 6 is located, so that the surface of the water bag 1 forms the recessed area 2. Figure 2

[0044] The number of reinforcing lines 6 can be two or more, so as to form a larger number of recessed areas 2, and the volume between the water bag 1 and the inner side wall of the bladder can be increased by increasing the number of recessed areas 2.

[0045] When the reinforcing line 6 is arranged on the outer side wall of the water bag 1, the reinforcing lines 6 can be crossed with each other to form a reinforcing net, and the reinforcing net is arranged on the surface of the water bag 1. After the reinforcing net is formed, because the reinforcing line 6 is arranged on the outer surface of the water bag 1 to constrain the expansion of the water bag 1, so that the surface of the water bag 1 forms the recessed area 2, and after the reinforcing lines 6 are crossed with each other, the recessed areas 2 on the surface of the water bag 1 can be connected with each other, so that the urine can flow smoothly between the recessed areas 2, and the surface of the water bag 1 is prevented from being attached to the bladder wall to cause the urine to be unable to flow into each recessed area 2.

[0046] Optionally, a constraint line 5 can be arranged in the water bag 1, and the constraint line 5 is also an elastic line. For example, when the water bag 1 is made, the inner side of the water bag 1 is turned up, and then the two ends of the constraint line 5 are fixed to the inner side of the water bag 1 by sewing or gluing, so that the constraint line 5 is connected to the inner side of the water bag 1. After the constraint line 5 is connected, the inner side of the water bag 1 is turned back to the original position, and at this time the constraint line 5 is located in the water bag 1. When the water bag 1 is inflated by water, the constraint line 5 pulls the connection area from the inner side, so that the surface of the water bag 1 forms the recessed area 2.

[0047] Embodiment two:

[0048] The second embodiment provides a bladder stabilizing device for radiotherapy, which is different from the first embodiment in that the pipeline 3 is provided with a second channel 7.

[0049] In order to avoid the urine generated by the patient having a high content, the second channel 7 is arranged on the pipeline 3, and the two ends of the second channel 7 are connected to the pipeline 3. When the one end of the pipeline 3 connected to the water bag 1 is inserted into the bladder, the urine in the bladder can be discharged through the second channel 7, so as to avoid the volume change of the bladder caused by the urine entering the bladder.

[0050] The first channel 4 and the second channel 7 are kept in a state of not being connected during radiotherapy, so as to avoid the liquid in the water bag 1 being discharged from the second channel 7. ​

[0051] As shown in Figure 3 , the first channel 4 and the second channel 7 can be two separate holes directly machined when the pipe 3 is prepared.

[0052] Optionally, as shown in Figure 4 , the pipe 3 can also include an outer tube 32 and an inner tube 31, the inner tube 31 is inserted into the outer tube 32, the hole of the inner tube 31 is the first channel 4, the inner diameter of the outer tube 32 is larger than the outer diameter of the inner tube 31, so that there is a gap between the inner tube 31 and the outer tube 32, and an annular space is formed between the inner tube 31 and the outer tube 32, which is the second channel 7.

[0053] One end of the inner tube 31 is connected to the water bag 1, and the other end of the inner tube 31 is located outside the outer tube 32, which can be connected to the outer tube 32 through a syringe, and then liquid is input into the inner tube 31.

[0054] As shown in Figure 5 , the end of the outer tube 32 located outside the body can be provided with an insertion hole in the side wall, and the inner tube 31 is inserted into the inner tube 31 from the insertion hole. In order to prevent urine in the second channel 7 from leaking from the insertion hole, the insertion hole and the inner tube 31 are in interference fit, so that a seal can be formed between the insertion hole and the inner tube 31.

[0055] As an optional solution, as shown in Figure 6 , the end of the outer tube 32 located outside the body can also be provided with a branch pipe 9, and the inner tube 31 is inserted into the inner tube 31 from the end of the branch pipe 9, the inner diameter of the branch pipe 9 is the same as the outer diameter of the inner tube 31, and a seal is formed between the branch pipe 9 and the inner tube 31. Because the contact area between the branch pipe 9 and the inner tube 31 is large in this solution, the contact area is stable, and urine leakage will not occur due to the bending and deformation of the inner tube 31, so this solution is a more preferred solution.

[0056] When an external force is applied to pull the inner tube 31, the inner tube 31 can be moved outward relative to the outer tube 32. Pulling the inner tube 31 outward can move the water bag 1 inside the outer tube 32, and when the outer tube 32 is removed, the water bag 1 will not come into contact with the human tissue. Because there is water in the water bag 1, the volume of the water bag 1 is large, and if the outer tube 32 is directly removed, the large volume of the water bag 1 will squeeze the urethra and cause pain to the patient, so the water bag 1 can be retracted into the outer tube 32 to avoid the water bag 1 from squeezing the urethra of the patient. The branch pipe 9 and the inner tube 31 are in interference fit, which prevents the inner tube 31 from easily moving relative to the branch pipe 9.

[0057] When the outer tube 32 is inserted, the water bag 1 can also be inserted into the outer tube 32, and the end of the outer tube 32 enters the bladder, water is filled into the water bag 1 through the first channel 4, and the water bag 1 expands and automatically moves outside the outer tube 32.

[0058] The inner tube 31 is pulled before the water bag 1 is taken out, so that the water bag 1 enters the outer tube 32. When the water bag 1 enters the outer tube 32, the water bag 1 is extruded by the inner wall of the outer tube 32, and the liquid in the water bag 1 is extruded into the inner tube 31, so that the liquid in the water bag 1 is discharged. Because the water bag 1 is extruded, the end of the inner tube 31 can be blocked. Therefore, the end of the inner tube 31 can be extended into the water bag 1, and a plurality of drainage holes can be arranged on the side wall of the inner tube 31 in the water bag 1, so that the liquid in the water bag 1 can enter the inner tube 31 through the plurality of drainage holes when the water bag 1 is extruded, and then be discharged from the inner tube 31.

[0059] The water in the water bag 1 can be discharged by a syringe connected to the outer tube 32, and then the water in the water bag 1 can be quickly discharged by the syringe.

[0060] The end of the inner tube 31 in the water bag 1 is connected to the inner side wall of the water bag 1, and the connection can be fixed by glue dispensing. Because the inner tube 31 is fixedly connected to the inner side wall of the water bag 1, after the water in the water bag 1 is discharged, the water bag 1 can tightly adhere to the outer side wall of the inner tube 31, so that the water bag 1 cannot shrink into a lump and cannot enter the outer tube 32.

[0061] When the water bag 1 is inflated, the end of the outer tube 32 can be blocked. Therefore, in order to ensure that the urine can be smoothly discharged, a through hole 8 can be arranged on the side wall of the second channel 7. Because the through hole 8 is arranged on the side wall of the second channel 7, the inflation of the water bag 1 will not block the through hole 8, so that the urine can be discharged.

[0062] Embodiment three:

[0063] The embodiment three provides a bladder stabilizing device for radiotherapy. Different from the embodiment one, the embodiment three is provided with a pressure sensor arranged in the first channel 4 for detecting the water pressure of the first channel 4.

[0064] The water pressure can reflect the pressure received by the water bag 1. Because the water bag 1 is located in the bladder, if the metabolic rate of the patient is high, the urine generated quickly fills the gap between the recessed area 2 and the bladder, which causes the bladder to be continuously expanded by the urine. In order to determine whether the bladder is expanded by the urine, the pressure sensor is arranged, and the state of the bladder can be judged by the pressure value of the pressure sensor. When the bladder is expanded by the urine, the pressure of the bladder on the water bag 1 rises, so that the pressure value detected by the pressure sensor can be used for judgment.

[0065] The probe of the pressure sensor is inserted into the first channel 4, and the pressure sensor can be provided with a display screen for displaying the pressure reading.

[0066] In use, an initial reading is recorded and, after positioning the target area, the current reading on the display is compared with the initial reading to determine the state of the patient's bladder.

[0067] If the patient's bladder is distended with urine, water can be removed from the first channel 4 by means of a syringe until the pressure sensor reading is reduced to the initial reading, i.e. until the bladder is the same size as it was immediately after the water bladder 1 was filled.

[0068] This embodiment three can also be applied to embodiment two, with the aim of preventing the second channel 7 from being accidentally blocked.

Claims

1. A bladder stabilizing device for radiotherapy, characterized in that, It includes a pipe (3) and a water bladder (1). The pipe (3) is provided with a first channel (4) for supplying water to the water bladder (1). The surface of the water bladder (1) is provided with areas of different elasticity, which are used to form a concave area (2) on the surface after the water bladder (1) is filled with water.

2. The bladder stabilizing device for radiotherapy according to claim 1, characterized in that, The pipe (3) is also provided with a second channel (7), which connects the two ends of the pipe (3). The recessed area (2) is connected to the second channel (7), which is used to drain urine.

3. A bladder stabilizing device for radiotherapy according to claim 1, characterized in that, The surface of the water bladder (1) is provided with elastic ribs (6). When the water bladder (1) is filled with water, the ribs (6) are stretched and apply inward pressure to the water bladder (1), so that a concave area (2) is formed on the surface of the water bladder (1).

4. A bladder stabilizing device for radiotherapy according to claim 3, characterized in that, The ribs (6) intersect to form a rib mesh, which covers the surface of the water bladder (1).

5. A bladder stabilizing device for radiotherapy according to claim 1, characterized in that, The water bladder (1) is provided with a constraint line (5) inside, and the two ends of the constraint line (5) are respectively connected to the inner sidewall of the water bladder (1).

6. A bladder stabilizing device for radiotherapy according to claim 2, characterized in that, The side wall of the pipe (3) is provided with a through hole (8), which is connected to the second channel (7).

7. A bladder stabilizing device for radiotherapy according to claim 2, characterized in that, The pipe (3) includes an outer pipe (32) and an inner pipe (31). The inner pipe (31) is inserted into the outer pipe (32). The first channel (4) is a passage of the inner pipe (31), and the second channel (7) is an annular space between the outer pipe (32) and the inner pipe (31).

8. A bladder stabilizing device for radiotherapy according to claim 7, characterized in that, The outer tube (32) is provided with a branch tube (9) at the end away from the water bladder (1), and the inner tube (31) is inserted into the outer tube (32) through the branch tube (9). The inner tube (31) and the branch tube (9) are press-fitted.

9. A bladder stabilizing device for radiotherapy according to claim 7, characterized in that, A shut-off valve is provided at the end of the inner tube (31) located outside the outer tube (32).

10. A bladder stabilizing device for radiotherapy according to claim 7, characterized in that, One end of the inner tube (31) is inserted into the water bladder (1), and the side wall of the inner tube (31) inside the water bladder (1) is provided with a drain hole.

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