Head and neck fixing pillow for radioactive therapy and fixing assembly

Abstract

The utility model discloses a head and neck fixing pillow for radioactive therapy and a fixing assembly, the head and neck fixing pillow for radioactive therapy comprises a main body integrally formed through 3D printing, the main body is provided with an upper surface in contact with a human body and a lower surface in contact with a positioning bed board, and the lower surface is provided with a plurality of positioning mounting holes; the main body is provided with a first pillow part used for supporting the head and neck and a second pillow part used for supporting the shoulders, a part of area of the upper surface of the first pillow part is sunken downwards to form a first limiting pit capable of enveloping the outer side of part of the head and neck of a human body, and the first pillow part has a first width; a part of the upper surface of the second pillow portion is recessed downwards to form a second limiting pit attached to the upper shoulder of the human body, and the second pillow portion has a second width larger than the first width. The main body is formed based on the body surface contour of the head, neck and shoulders of the patient, has the advantages of being simple in structure, good in stability and high in breathability and comfort level, the main body completely attached to the head of the patient avoids deviation of the head of the patient in the treatment process, and the positioning precision of radioactive rays during radiotherapy is improved.

Description

Technical Field

[0001] This application relates to auxiliary devices during radiotherapy, and particularly to a head and neck fixing pillow and a fixing component for radiotherapy. Background Art

[0002] Radiotherapy is an important treatment for head and neck cancers. Many patients with primary head and neck cancers have better functional outcomes after radiotherapy than after surgery. Therefore, for local lesions in the head and neck, radiotherapy is preferably used. When treating locally advanced lesions, radiotherapy is usually used together with chemotherapy as a radical treatment method to preserve organ function, or as adjuvant treatment after surgery.

[0003] Radiotherapy eliminates tumor cells through radiation, so the precise positioning of tumor cells is very important during the treatment process. For radiotherapy of head and neck tumors, it is necessary to fix the patient's head and neck and prevent the patient from moving or rotating. Currently, many head fixing devices fix the patient's head and neck through clamps. Due to the long radiotherapy process and the clamps not fitting well with the patient's head, it often causes discomfort to the patient and increases the probability of the patient's head shifting, reducing the accuracy of ray positioning and thus reducing the treatment effect. In addition, the manufacturing and use costs of the fixing device need to be considered, and the economic burden on the patient should be minimized as much as possible. Summary of the Invention

[0004] The purpose of this application is to provide a head and neck fixing pillow and a fixing component for radiotherapy that have a high degree of fit with the patient's head and neck, stable support, and low cost.

[0005] To achieve the above purpose, this application adopts the following technical solution: A head and neck fixing pillow for radiotherapy includes a main body integrally formed by 3D printing. The main body has an upper surface in contact with the human body and a lower surface in contact with the positioning bedplate. A plurality of positioning and mounting holes are provided on the lower surface. The main body has a first pillow part for supporting the head and neck and a second pillow part for supporting the shoulders. A part of the upper surface of the first pillow part is recessed downward to form a first limiting pit that can envelope the outer side of a part of the human head and neck. The first pillow part has a first width W1. A part of the upper surface of the second pillow part is recessed downward to form a second limiting pit that fits with the upper shoulders of the human body. The second pillow part has a second width W2, and the second width W2 is greater than the first width W1.

[0006] In one embodiment, 150 < W1 < 250 mm for the first width, and 300 < W2 < 500 mm for the second width.

[0007] In one embodiment, the height of the main body is 50 - 120 mm, and the maximum depth of the first limiting pit is 50 mm.

[0008] In one embodiment, the length of the main body is 200-500 mm.

[0009] In one embodiment, the main body is made of high molecular polymer material.

[0010] In one embodiment, the main body is constructed from a three-dimensional grid to form a hollow structure.

[0011] In one embodiment, the mesh density at the first and second recesses is smaller than the mesh density at other locations of the main body.

[0012] A head and neck fixation assembly for radiotherapy comprises a positioning bed plate for supporting a human torso, a head and neck fixation pillow, and a thermoplastic mask for covering the human head and face. The thermoplastic mask and the head and neck fixation pillow are both fixedly connected to the positioning bed plate, and the head and neck fixation pillow is located within the thermoplastic mask.

[0013] In one embodiment, the thermoplastic mask includes a frame and a thermoplastic mesh stretched within the frame. On a plane parallel to the positioning bed board, the outer contour of the head and neck support pillow matches the inner contour of the frame.

[0014] In one embodiment, a plurality of butterfly bolts are rotatably provided on the frame of the thermoplastic mask, a plurality of bolt holes are provided on the positioning bed plate, and the lower end of each butterfly bolt passes through the thread of the frame and fits into the bolt hole on the positioning bed plate.

[0015] Compared with the prior art, this application achieves the following beneficial effects:

[0016] The head and neck fixation pillow of the present application is molded based on the surface contours of the patient's head and neck, and has the advantages of simple structure, high breathability and comfort. It can completely fit the patient's head, shoulders and neck, avoiding the patient's head from shifting during treatment and improving the positioning accuracy of radiation during radiotherapy. The head and neck fixation pillow of the present application can be used in conjunction with a thermoplastic mask and a positioning bed plate to stabilize and fix the patient. Since the positioning bed plate is reusable and does not need to be replaced every time, the production cost of the thermoplastic mask is low, and the head and neck fixation pillow is made of a reasonable three-dimensional grid, which can achieve a stable support structure with less material. Therefore, the head and neck fixation assembly of the present application has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a head and neck support pillow provided in an embodiment of the present application;

[0018] Figure 2 A bottom view of a head and neck support pillow provided in an embodiment of the present application;

[0019] Figure 3 Schematic diagram of a thermoplastic mask provided in an embodiment of the present application (unplasticized);

[0020] Figure 4 A schematic diagram of a thermoplastic mask provided in an embodiment of the present application (after plasticization);

[0021] Figure 5 Schematic diagram of the head and neck fixation assembly provided in an embodiment of the present application.

[0022] Among them: 100, head and neck fixing pillow; 110, first pillow part; 111, first limiting pit; 112, positioning installation hole; 120, second pillow part; 121, second limiting pit; 200, thermoplastic mask; 210, frame; 220, mesh; 230, butterfly bolt; 300, positioning bed board. DETAILED DESCRIPTION

[0023] In order to describe the technical content, structural features, achieved purposes and effects of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but are not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0024] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0025] The “upper” and “lower” directions in this application correspond to the attached Figure 5 The up and down directions in .

[0026] An embodiment of the present application provides a head and neck fixation pillow for radiotherapy, which is placed on an operating table and fixedly connected to a positioning bed plate by fasteners. During radiotherapy, the patient lies on his back on the head and neck fixation pillow, thereby providing stable support and fixing the patient's head and neck, preventing the patient's head from shaking during treatment.

[0027] As Figure 1 , 2 shown, the head and neck fixing pillow 100 includes a main body capable of accommodating part of the patient's head, neck and shoulders. The main body is formed by using 3D printing technology with a non-metallic material based on the body surface contours of the patient's head and neck. The main body of the head and neck fixing pillow 100 has an upper surface contacting the human body and a lower surface contacting the positioning bedplate 300. A plurality of positioning and mounting holes 112 are formed on the lower surface. The head and neck fixing pillow 100 can be fixedly mounted on the positioning bedplate 300 through bolts to prevent displacement. Multiple lugs can also be provided on the lower surface of the head and neck fixing pillow, and positioning and mounting holes are formed at the lugs. While fixing the thermoplastic mask, the butterfly bolts simultaneously pass through the positioning and mounting holes, so as to achieve the purpose of simultaneously fixing the thermoplastic mask and the head and neck fixing pillow.

[0028] Furthermore, the head and neck fixing pillow 100 is generally in a "T" shape with one end wide and one end narrow. The main body has a first pillow part 110 for supporting the head and neck and a second pillow part 120 for supporting the shoulders. A partial area on the upper surface of the first pillow part 110 is recessed downward to form a first limiting pit 111 capable of enveloping the human head and neck. The first pillow part has a first width W1. Generally, 150 < W1 < 250 mm, approximately 20 - 100 mm larger than the width of the human head, and it can be adapted for people of different ages and head circumferences. Usually, for adults, the commonly used width sizes of W1 are 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230 mm, etc. A partial area on the upper surface of the second pillow part 120 is recessed downward to form a second limiting pit 121 that fits the upper half of the human shoulder. The second pillow part 120 has a second width W2. The second width W2 is greater than the first width W1. The second width 300 < W2 < 500 mm, approximately 20 - 100 mm larger than the width of the human shoulder. Usually, for adults, the commonly used width sizes of W2 are 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470 mm, etc.

[0029] Before manufacturing the head and neck fixing pillow 100, it is usually necessary to perform three-dimensional scanning and modeling on the patient's body parameters, and then conduct

[0030] More preferably, the mesh density at the first recess 111 and the second recess 121 of the head and neck support pillow 100 is smaller than the mesh density at other locations of the main body.

[0031] To ensure stable support for the head, neck, and shoulders during radiotherapy without discomfort, the head and neck support pillow 100 in this embodiment has a main body height (the distance from the upper surface to the lower surface) of 50-120 mm, and a maximum depth of 50 mm for the first retaining recess. This ensures the back of the patient's head is completely enclosed by the first support, providing a safe and comfortable feeling while preventing rotation. Common main body heights for adults include 50, 55, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, and 80 mm.

[0032] In this embodiment, the head and neck support pillow 100 has a main body length of 200-500 mm, capable of covering the area from the top of the head to the upper shoulders. Common heights for adults include 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470, 480, and 490 mm. The first and second recesses 111, 121 are interconnected, with a raised area corresponding to the neck located between them, providing stable support for the neck.

[0033] See also Figure 3-5 The present application also provides a head and neck fixation assembly for radiotherapy, comprising a positioning bed plate 300 for supporting the human torso, a head and neck fixation pillow 100, and a thermoplastic mask 200 for covering the head and face of the human body. The positioning bed plate 300 is usually a radiotherapy bed and can be reused many times, while the thermoplastic mask 200 and the head and neck fixation pillow 100 are replaced according to each patient. The thermoplastic mask 200 is a universal component and is mass-produced, so the procurement cost is low. The head and neck fixation pillow 100 is customized to fit the body contour of each patient. Therefore, the solution of the head and neck fixation assembly for radiotherapy can combine economic cost, fixation effect and comfort, and is very suitable for patients.

[0034] The thermoplastic mask 200 and the head and neck fixing pillow 100 are both fixedly connected to the positioning bed board 300 , and the head and neck fixing pillow 100 is located in the thermoplastic mask 200 .

[0035] The thermoplastic mask 200 includes a frame 210 and a thermoplastic mesh 220 stretched within the frame. On the horizontal plane, the outer contour of the head and neck support pillow 100 coincides with the inner contour of the frame 210, so that when the thermoplastic mask is installed on the head and neck support pillow, it can be ensured that there is no excessive gap between the head and neck support pillow and the thermoplastic mask, and the head and neck support pillow will not shake inside the thermoplastic mask.

[0036] A plurality of butterfly bolts 230 are rotatably provided on the frame 210 of the thermoplastic mask 200, and a plurality of bolt holes are provided on the positioning bed plate 300. The lower end of each butterfly bolt 230 passes through the frame 210 and is threadedly engaged in the bolt hole on the positioning bed plate 300 to achieve the stable fixing of the thermoplastic mask 200 on the positioning bed plate.

[0037] Before radiotherapy begins, the head and neck support pillow 100 is first fixed to the positioning bedplate 300. The thermoplastic mask 200 is then heated to soften and pliable. The heated material is then placed on the patient's face, using pressure and shaping tools to conform to the facial contours, and the butterfly bolts are locked in place. During the cooling process, the mask is molded to the patient's facial shape. Once molded, the patient can leave the positioning bedplate. Once the shaping is complete, the mask cools and solidifies before proceeding with radiotherapy.

[0038] The main body of this application is formed based on the surface contour of the patient's head and neck. It has a simple structure, high breathability and comfort. The main body fits the patient's head perfectly to avoid displacement of the patient's head during treatment and improve the positioning accuracy of radiation during radiotherapy.

[0039] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. The scope of protection claimed in the present application is defined by the appended claims, the description and their equivalents.

Claims

1. A head and neck fixation pillow for radiotherapy, characterized in that: It includes a main body integrally formed by 3D printing. The main body has an upper surface in contact with the human body and a lower surface opposite to the upper surface. The main body has a first pillow part for supporting the head and neck and a second pillow part for supporting the shoulders. On the upper surface of the first pillow part, there is a partial area sunken downward to form a first limiting concave pit that can envelope the outside of a partial human head and neck. The first pillow part has a first width W1. On the upper surface of the second pillow part, there is a partial area sunken downward to form a second limiting concave pit that fits the upper shoulders of the human body. The second pillow part has a second width W2, and the second width W2 is greater than the first width W1.

2. The head and neck fixation pillow for radiotherapy according to claim 1, characterized in that: The first width is 150 < W1 < 250 mm, and the second width is 300 < W2 < 500 mm.

3. The head and neck fixation pillow for radiotherapy according to claim 1, characterized in that: The height of the main body is 50 - 120 mm, and the maximum depth of the first limiting concave pit is 50 mm.

4. The head and neck fixation pillow for radiotherapy according to claim 1, characterized in that: A plurality of positioning and mounting holes are provided on the lower surface.

5. The head and neck fixation pillow for radiotherapy according to claim 1, characterized in that: The length of the main body is 200 - 500 mm.

6. The head and neck fixation pillow for radiotherapy according to claim 1, characterized in that: The main body is formed by building a three-dimensional grid to form a hollow structure.

7. The head and neck fixation pillow for radiotherapy according to claim 6, characterized in that: The grid density of the first limiting concave pit and the second limiting concave pit is less than the grid density of the rest of the main body.

8. A head and neck fixation assembly for radiotherapy, characterized in that: It includes a positioning bed board for supporting the human trunk, a head and neck fixing pillow as described in any one of claims 1 - 7, and a thermoplastic mask for covering the human head and face. The thermoplastic mask and the head and neck fixing pillow are both fixedly connected to the positioning bed board, and the head and neck fixing pillow is located inside the thermoplastic mask.

9. The head and neck fixation assembly for radiotherapy according to claim 8, characterized in that: The thermoplastic mask includes a frame and a thermoplastic mesh sheet tensioned inside the frame. In a plane parallel to the positioning bed board, the outer contour of the head and neck fixing pillow coincides with the inner contour of the frame.

10. The head and neck fixation assembly for radiotherapy according to claim 8, characterized in that: A plurality of butterfly bolts are rotatably provided on the frame of the thermoplastic mask. A plurality of bolt holes are provided on the positioning bed board. The lower ends of each of the butterfly bolts respectively pass through the frame and are threadedly engaged in the bolt holes on the positioning bed board.

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