Fixing device suitable for lithotomy position irradiation

Abstract

The utility model relates to the technical field of radiotherapy, in particular to a fixing device suitable for lithotomy position irradiation, which comprises a fixing plate used for being placed on an accelerator treatment bed, and the fixing plate is provided with an omentum which is used for being attached to the abdomen, the thighs and the vulva of a patient after being soaked and softened by warm water and is cooled and shaped. A detachable connecting structure matched with the fixing plate is arranged on the net film, and polystyrene foam bags used for supporting the thighs, the shanks and the lower side faces of knee joints of a patient are further arranged on the two sides of the front portion of the fixing plate. The fixing device is helpful for greatly improving the positioning accuracy of a pelvic tumor patient in radiotherapy.

Description

Technical Field

[0001] The utility model relates to the technical field of radiotherapy, and particularly relates to a fixing device suitable for lithotomy position irradiation. Background Art

[0002] Radiotherapy is one of the main treatment means for vaginal and vulvar malignant tumors. During the implementation of radiotherapy, the fixation of the patient's body position and the repeatability of the patient's body position are the keys affecting the efficacy of precise radiotherapy. At present, during the implementation of external radiotherapy for vulvar and vaginal malignant tumors, especially the electron boost radiotherapy using a medical linear accelerator, the patient mostly adopts the "lithotomy position", that is, the patient lies flat on the treatment bed of the medical linear accelerator, the buttocks are elevated, the knees are flexed, and the thighs are abducted and separated, effectively exposing the vulva, so as to facilitate the rotation of the medical linear accelerator head and alignment with the vulva for external radiotherapy.

[0003] However, the existing fixing devices for the external radiotherapy body position of vulvar tumors have defects such as poor stability, poor body position repeatability, poor patient comfort, and great difficulty for radiotherapy technicians to position the body. In particular, the positioning and fixation of the thighs and knees affect the accuracy and stability of treatment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a fixing device suitable for lithotomy position irradiation, which helps to greatly improve the accuracy of positioning pelvic tumor patients during radiotherapy.

[0005] The technical solution of the utility model is as follows: A fixing device suitable for lithotomy position irradiation includes a fixing plate for placing on the accelerator treatment bed. A net is arranged on the fixing plate and is used to fit on the patient's abdomen, thighs and vulva after being softened by soaking in warm water and then cooled and shaped. A detachable connection structure for cooperating with the fixing plate is arranged on the net. Foam rubber bags for supporting the lower sides of the patient's thighs, calves and knees are also arranged on both sides of the front part of the fixing plate.

[0006] Furthermore, the net includes an abdominal fixing part for fitting on the patient's abdomen. Leg fixing parts for fitting on the upper sides of the patient's thighs are connected to both sides of the front part of the abdominal fixing part. The middle part of the front side of the abdominal fixing part has a fitting part for fitting on the patient's vulva opening. A pressing part for cooperating with the fixing plate is arranged between the leg fixing parts and on the front side of the fitting part.

[0007] Furthermore, the detachable connection structure includes a first fixing part arranged on both sides of the abdominal fixing part and extending downward. A second fixing part extending downward is arranged on the outer side of the leg fixing part. Plug-ins for cooperating with the fixing plate are connected to the lower ends of the first fixing part and the second fixing part.

[0008] Further, a horizontal plate is provided at the lower end of the plug, which turns inward to form a clamping groove on the inner side of the plug. A pair of grooves are provided on both sides of the fixing plate, and convex parts for clamping the clamping groove are provided on the side walls of the grooves. A locking bolt is provided on the side of the fixing plate and penetrates horizontally into the groove.

[0009] Further, a sunk groove is provided in the middle of the front side of the fixing plate, and a pressing block for pressing the pressing part into the sunk groove to achieve a tight fit is installed.

[0010] Further, a pair of arc-shaped concave parts recessed outward are provided on both side walls of the sunk groove, and a pull rope is installed on the pressing block.

[0011] Further, the omentum is reticular and made of a low-temperature thermoplastic material.

[0012] Further, the foamed rubber bag is formed by hardening and shaping the foamed rubber material contained in the bag under the lower side of the knee joint.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The fixing device helps to greatly improve the accuracy and personalized positioning of pelvic tumor patients during radiotherapy.

[0015] 2. The fixing device is simple to operate, safe and convenient to use, facilitates radiotherapy technicians to improve the positioning accuracy, reduces the workload, and can be applied to positioning scans under CT or MRI at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a top view schematic diagram of the utility model;

[0017] Figure 2 is a front view structural diagram of the omentum of the utility model;

[0018] Figure 3 is a schematic diagram of the matching structure of the plug and the groove of the utility model;

[0019] In the figure: 10 - fixing plate, 11 - groove, 12 - convex part, 13 - locking bolt, 14 - sunk groove, 141 - arc-shaped concave part, 15 - pressing block, 20 - omentum, 21 - abdominal fixing part, 22 - leg fixing part, 23 - fitting part, 24 - pressing part, 25 - first fixing part, 26 - second fixing part, 27 - plug, 271 - clamping groove, 272 - horizontal plate, 30 - foamed rubber bag. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the above features and advantages of the utility model more understandable, specific embodiments are given below in conjunction with the accompanying drawings and described in detail as follows, but the utility model is not limited thereto.

[0021] Reference Figures 1 to 3

[0022] A fixing device suitable for lithotomy position irradiation, comprising a fixing plate 10 for placing on an accelerator treatment bed. A net 20 is arranged on the fixing plate. After being softened by soaking in warm water, the net is used to fit on the patient's abdomen, thigh and vulva and is cooled and shaped. A detachable connection structure is arranged on the net and is matched with the fixing plate. Foam rubber bags 30 for supporting the patient's thigh, calf and the lower side of the knee joint are also arranged on both sides of the front part of the fixing plate.

[0023] In this embodiment, in order to better fix the patient, the net includes an abdominal fixing part 21 for fitting on the patient's abdomen. Leg fixing parts 22 for fitting on the upper side of the patient's thighs are connected to both sides of the front part of the abdominal fixing part. A fitting part 23 for fitting on the patient's vulva opening is arranged in the middle of the front side of the abdominal fixing part. A pressing part 24 matched with the fixing plate is arranged between the leg fixing parts and on the front side of the fitting part.

[0024] In this embodiment, the detachable connection structure includes first fixing parts 25 arranged on both sides of the abdominal fixing part and extending downward. Second fixing parts 26 extending downward are arranged on the outer sides of the leg fixing parts. Plug-ins 27 matched with the fixing plate are fixed at the lower ends of the first fixing parts and the second fixing parts, so as to be connected and fixed with the fixing plate through the plug-ins.

[0025] In this embodiment, in order to better realize the detachable connection between the plug-in and the fixing, a cross plate 272 is arranged at the lower end of the plug-in, which turns inward to form a buckle groove 271 on the inner side of the plug-in. A pair of grooves 11 are arranged on both side parts of the fixing plate. A convex part 12 for buckling with the buckle groove is arranged on the side wall of the groove. A locking bolt 13 penetrating into the groove horizontally is arranged on the side part of the fixing plate. Thus, the plug-in is inserted into the groove and buckled on the convex part, and then the plug-in is locked through the locking bolt to reduce the movement of the net.

[0026] In this embodiment, a sinking groove 14 is arranged in the middle of the front side of the fixing plate, and a pressing block 15 for pressing the pressing part into the sinking groove to achieve a tight fit is installed. The pressing block is an isosceles trapezoid pressing block. A pair of arc-shaped concave parts 141 recessed outward are arranged on both side walls of the sinking groove. A pull rope is installed on the pressing block, so as to facilitate the disassembly of the pressing block through the pull rope or in cooperation with a crowbar.

[0027] In this embodiment, the net is reticular and made of a low-temperature thermoplastic material.

[0028] In this embodiment, the foam rubber bag is formed by hardening and shaping the foam rubber material filled in the bag under the lower side of the knee joint. The bag is a special bag for foam rubber.

[0029] Usage method of the device:

[0030] 1. Body position fixation: The patient takes the lithotomy position on the fixing plate. The patient's vulva is horizontally perpendicular to the tip of the pressing block. The bilateral thighs form an angle of 60°, and the angle between the thigh and the lower leg is 60°. The heels of both feet are placed at the outermost side of the front end of the fixing plate.

[0031] 2. Application of the foaming glue bag: That is, mix the prepared foaming glue A and B evenly according to the shape of the knee joint and pour them into a special bag. After about three minutes, place the knee joint on the bag, so that the lower side of the patient's thigh, the lower side of the lower leg, and the lower side of the knee joint are supported on the upper side of the foaming glue bag. After about five minutes, the foaming glue in the bag hardens, and concave parts that fit the thigh and lower leg will be formed on the foaming glue bag, so that the knee joint, thigh, and lower leg are effectively supported and wrapped, making it conformable and playing a role of fixing and supporting.

[0032] 3. Making an individualized omentum: According to the patient's body position and the anatomical position of the vulva, fix it with the fixing plate and make an omentum in the lithotomy position. This omentum is a low-temperature thermoplastic material, which is softened by soaking in water at 70 degrees Celsius for about 1 minute. After taking it out and drying the water, it is attached to the vulva opening according to the patient's body position and the anatomical position of the vulva. After the body film is completely cooled, it is shaped, and the installation and fixation of the plug-in are completed.

[0033] 4. After making the omentum and marking the position of the vulva irradiation field, perform a reset verification on the treatment CT machine. Specific parameters: The bed angle is 270°, the gantry angle is 60°, and the source-skin distance is 100 cm, so that the irradiation center of the radiation source coincides with the target center position marked on the body film, and then start radiotherapy.

[0034] If the present utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or it can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming using casting technology) (except when it is obviously impossible to use the integral forming process).

[0035] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present utility model, unless otherwise stated, include states or shapes that are approximate, similar, or close to it.

[0036] Any component provided by the present utility model can either be assembled from multiple separate components or be a single component manufactured by integral forming technology.

[0037] The above are only the preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model shall fall within the scope covered by the present utility model.

Claims

1. A fixing device suitable for lithotomy position irradiation, comprising a fixing plate for placement on an accelerator treatment bed, characterized in that: The fixing plate is provided with a mesh membrane which is softened by soaking in warm water and is used to fit the patient's abdomen, thighs and vulva and cool and shape them. The mesh membrane is provided with a detachable connecting structure that cooperates with the fixing plate. The front two sides of the fixing plate are also provided with foam bags for supporting the patient's thighs, calves and lower sides of the knee joints.

2. A fixing device suitable for lithotomy position irradiation according to claim 1, characterized in that: The omentum includes an abdominal fixing portion for fitting the patient's abdomen, both sides of the front of the abdominal fixing portion are connected with leg fixing portions for fitting the upper sides of the patient's thighs, the front middle part of the abdominal fixing portion has a fitting portion for fitting the patient's vulva, and a clamping portion that cooperates with the fixing plate is provided between the leg fixing portions and on the front side of the fitting portion.

3. A fixing device suitable for lithotomy position irradiation according to claim 2, characterized in that: The detachable connection structure includes a first fixing part which is arranged on both sides of the abdomen fixing part and extends downward, and a second fixing part which extends downward is arranged on the outer side of the leg fixing part, and the lower ends of the first fixing part and the second fixing part are both connected to plug-ins which match the fixing plate.

4. A fixing device suitable for lithotomy position irradiation according to claim 3, characterized in that: The lower end of the plug-in is provided with a horizontal plate that turns inward to form a buckle groove on the inner side of the plug-in, and the two sides of the fixed plate are provided with a pair of grooves, the side walls of the groove are provided with convex parts for buckling the buckle grooves, and the side of the fixed plate is provided with a locking bolt that penetrates the groove transversely.

5. A fixing device suitable for lithotomy position irradiation according to claim 2, 3 or 4, characterized in that: A recessed groove is arranged in the middle of the front side of the fixing plate and a pressing block is installed thereon for pressing the pressing part into the recessed groove to achieve a tight fit.

6. A fixing device suitable for lithotomy position irradiation according to claim 5, characterized in that: Both side walls of the sink are provided with a pair of arc-shaped recessed portions sunken outwards, and a pull rope is installed on the pressing block.

7. A fixing device suitable for lithotomy position irradiation according to claim 1, 2, 3, 4 or 6, characterized in that: The mesh is in mesh shape and is made of low-temperature thermoplastic material.

8. A fixing device suitable for lithotomy position irradiation according to claim 1, 2, 3, 4 or 6, characterized in that: The foam rubber bag is formed by placing the foam rubber material in the bag on the lower side of the knee joint and hardening and shaping it.

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