Customized body surface fixing device for head, neck and shoulder radiotherapy

Abstract

The utility model discloses a customized body surface fixing device for head, neck and shoulder radiotherapy. The customized body surface fixing device comprises a fixed base, a lower positioning plate and an upper positioning plate, the fixed base comprises a base and plug pin plates arranged on the two sides of the base, a first conformal curved surface matched with the outer surface of the lower positioning plate is arranged on the surface of the base, and a plurality of limiting holes are further formed in the surface of the base; the inner surface of the lower positioning plate is completely matched with the surface curvature of the back skin of the head, the shoulder and the neck of the patient, and cylindrical positioning rods matched with the limiting holes are arranged on the outer surface of the lower positioning plate; positioning grooves are formed in the two sides of the lower positioning plate; the inner surface of the upper positioning plate is matched with the skin surface of a patient in shape, positioning blocks matched with the positioning grooves are arranged on the two sides of the upper positioning plate, and a ventilation opening is further formed in the upper positioning plate. According to the device, the comfort, accuracy, repeatability and stability of body position positioning of the head, neck and shoulder patients can be improved, so that precise implementation of radiotherapy is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a customized body surface fixation device for head, neck and shoulder radiotherapy. Background Art

[0002] Radiotherapy is a treatment for malignant tumors and some benign diseases using one or more ionizing radiations. During radiotherapy, patients usually undergo radiotherapy according to the clinically specified radiotherapy plan. Posture deviation and involuntary movement during radiotherapy can cause tumor displacement, resulting in dose deviation in the target area. Therefore, it is necessary to maintain a high degree of precision and repeatability of the posture during multiple repeated treatments.

[0003] With the continuous development of computer technology, radiotherapy has entered the "three-precision" era, namely precise positioning, precise planning, and precise treatment. Among them, precise positioning is the first step of precise radiotherapy. Radiotherapy needs to fix the patient's posture before treatment. Therefore, before radiotherapy, posture fixation is the first and most important step of the whole precise radiotherapy. Moreover, to ensure the accuracy and repeatability of the patient's posture during radiotherapy, reliable posture fixation technology and fixation devices are required. Good and reliable posture fixation can not only improve the patient's compliance, but also reduce the setup error and improve the setup accuracy.

[0004] From the anatomical structure, the head, neck and shoulder are composed of bones, soft tissues and joints. The joints between the upper and lower vertebral bodies of the cervical vertebra and the skull are attached with ligaments and muscles around them. These anatomical characteristics determine that the relative positions of anatomical structures such as the skull, mandible, cervical vertebra and shoulder are prone to change. Therefore, ensuring that the positions and relative relationships of the anatomical structures of the head and neck during radiotherapy are exactly the same as those during the image acquisition process of simulation positioning becomes the primary and key link to improve the efficacy of radiotherapy.

[0005] At present, the body position fixation for head and neck radiotherapy mainly includes the following types: 1. Standard headrest and thermoplastic membrane body position fixation: Standard-sized headrests support the occipital part of the patient. According to the size and shape of the thermoplastic membrane, it can be divided into head membranes, head-neck-shoulder membranes, body membranes, etc. After soaking the thermoplastic membrane body in hot water, it is applied to the patient's skin surface and moderately pressed to conform to the body surface. After the membrane body cools down, it solidifies and forms, binding the patient's jaw, shoulder and other body surfaces, achieving the purpose of fixing the body position to a certain extent. Although the thermoplastic membrane has good air permeability, no pollution, easy to use, etc., it has the following disadvantages: The standard headrests on the market are limited to several fixed specifications, and cannot perfectly solve the problem of the void at the posterior neck position caused by individual differences of patients. At the same time, there is a large gap between the thermoplastic membrane and the patient's body surface, so the positioning accuracy and repeatability are greatly reduced. In addition, the thermoplastic material has the phenomenon of thermal expansion and contraction. In the low-temperature environment in winter, the cooled and formed thermoplastic membrane will have a slight shrinkage over time, causing varying degrees of compressive discomfort when attached to the patient's jaw. At the same time, the thermoplastic membrane cannot be squeezed or placed in a high-temperature environment during storage, as it is prone to deformation. 2. Vacuum negative pressure pad body position fixation: Vacuum negative pressure pads are mainly used for the fixation of the chest, abdomen, pelvic cavity and other parts, and it is difficult to achieve the high-precision body position fixation required by head and neck tumor patients, and there is a possibility of deformation due to loss of vacuum during use. Therefore, how to provide a customizable body surface fixation device for head, neck and shoulder radiotherapy with high comfort, precision, repeatability and stability according to the clinical needs is a problem that needs to be solved by those skilled in the art. Summary of the Utility Model

[0006] The technical problem to be solved by the present utility model is: aiming at the deficiencies existing in the prior art, to provide a customizable body surface fixation device for head, neck and shoulder radiotherapy, which can improve the comfort, precision, repeatability and stability of body position positioning for head, neck and shoulder patients, so as to ensure the accurate implementation of radiotherapy.

[0007] To solve the above technical problem, the technical solution of the present utility model is:

[0008] A customizable body surface fixation device for head, neck and shoulder radiotherapy, comprising a fixed base, a lower positioning plate and an upper positioning plate;

[0009] The fixed base includes a base and pin plates arranged on both sides of the base. The surface of the base is provided with a first conforming curved surface adapted to the outer surface of the lower positioning plate, and a plurality of limiting holes are also provided on the surface of the base;

[0010] The inner surface of the lower positioning plate is a second conforming curved surface that completely conforms to the curvature of the back skin surface of the patient's head, neck and shoulders. The outer surface of the lower positioning plate is provided with cylindrical positioning rods adapted to the limiting holes; positioning grooves are provided on both sides of the lower positioning plate;

[0011] The inner surface of the upper positioning plate is a third conforming curved surface conforming to the patient's skin surface. Positioning blocks adapted to the positioning grooves are provided on both sides of the upper positioning plate, and ventilation openings are also provided on the upper positioning plate.

[0012] Preferably, positioning holes are provided on the plug plate.

[0013] Preferably, an annular limiting groove is provided inside the limiting hole, and a limiting protrusion adapted to the annular limiting groove is provided on the cylindrical positioning rod.

[0014] Preferably, the positioning block includes a limiting portion and a plugging portion adapted to the positioning groove.

[0015] Preferably, the number of the limiting holes is at least two, and the number of the cylindrical positioning rods is the same as that of the limiting holes.

[0016] Due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0017] The present invention provides a customized body surface fixing device for head, neck and shoulder radiotherapy, including a fixing base, a lower positioning plate and an upper positioning plate, which are clamped and connected with each other, convenient to fix, and the shapes of the fixing base, the lower positioning plate and the upper positioning plate can be customized according to the individual curvature of the patient's body surface, with high conformity, which can effectively avoid the problem of void in the posterior neck position caused by the traditional fixing method using a headrest and a heating plastic film. At the same time, it can improve the positioning accuracy, repeatability, patient compliance and comfort, ensure the precise fixation of the head, neck and shoulder anatomical structures of the patient during radiotherapy, avoid the body position change and tumor displacement caused by the involuntary movement of the patient during radiotherapy, improve the replicability of the radiotherapy and simulation positioning body positions, and reduce the deviation of the tumor irradiation dose in radiotherapy.

[0018] The device is provided with ventilation openings. The number and position of the ventilation openings are not unique and can be customized according to the patient's needs. For example, if there are special requirements for the target area and the skin needs to be completely exposed, ventilation holes with corresponding shapes can be designed at the target area position without affecting the target area. The setting of the ventilation opening part can also reduce the compression feeling on the respiratory throat part on the premise of ensuring the effective fixation and positioning of the patient, improve the comfort of the patient, and prevent the discomfort caused by the compression feeling from causing the patient to be nervous and move involuntarily.

[0019] The positions and numbers of the connecting structures such as the positioning grooves, positioning blocks, limiting holes, cylindrical positioning rods, etc. in the device are not unique either, and will intentionally avoid the relevant target area positions when the clinical decision-maker marks the target area positions.

[0020] This fixing device does not need to be fabricated on site, and the material has a moderate hardness, which can avoid problems such as uneven stretching, unstable positioning, thermal deformation, and cold shrinkage of the traditional thermoplastic film. At the same time, this device does not require hot water immersion, avoiding problems such as wound or tumor surface ulceration, infection, and non-healing caused by the influence of hot water on the skin surface. This fixing device is mainly used for the body position fixation of the head, neck, and shoulder parts of head and neck tumor patients, avoiding the disadvantages of the vacuum negative pressure pad being difficult to effectively fix the head, neck, and shoulders, and there is no problem of vacuum loss deformation caused by being pierced by sharp objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0023] Figure 2 is a schematic structural diagram of the fixing base;

[0024] Figure 3 is Figure 2 a cross-sectional view taken along the A-A direction;

[0025] Figure 4 is a schematic structural diagram of the lower positioning plate;

[0026] Figure 5 is a three-dimensional structural diagram of the lower positioning plate in another direction;

[0027] Figure 6 is a schematic structural diagram of the upper positioning plate;

[0028] In the figure, 1, fixing base; 2, lower positioning plate; 3, upper positioning plate; 4, base; 5, pin plate; 6, first conforming surface; 7, limiting hole; 8, positioning hole; 9, second conforming surface; 10, cylindrical positioning rod; 11, positioning groove; 12, third conforming surface; 13, positioning block; 1301, limiting part; 1302, plugging part; 14, air vent; 15, annular limiting groove; 16, limiting protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1

[0031] As Figures 1 to 6 shown, a customized body surface fixation device for head, neck and shoulder radiotherapy includes a fixed base 1, a lower positioning plate 2, and an upper positioning plate 3;

[0032] As Figures 1 to 3 collectively shown, the fixed base 1 includes a base 4 and pin plates 5 provided on both sides of the base 4. The surface of the base 4 is provided with a first conforming curved surface 6 adapted to the outer surface of the lower positioning plate 2 to maintain good support stability. The surface of the base 4 is also provided with a plurality of limit holes 7 for accurately guiding the position of the lower positioning plate 2.

[0033] Furthermore, the fixed base 1 in this device can be prepared by integrally forming a 3D print using carbon fiber material, which has a low attenuation rate for radioactive rays.

[0034] Even further, the pin plate 5 is provided with positioning holes 8. During use, the positioning holes 8 are passed through the fixing columns on the radiotherapy couch plate to complete the positioning of the fixed base 1, preventing the fixed base 1 from moving relative to the radiotherapy couch plate and other equipment, and improving the positioning accuracy.

[0035] As Figure 1 、 Figures 4 - 5 collectively shown, the inner surface of the lower positioning plate 2 is a second conforming curved surface 9 that completely conforms to the curvature of the back skin surface of the patient's head, neck and shoulders. The outer surface of the lower positioning plate 2 is provided with cylindrical positioning rods 10 adapted to the limit holes 7. The cylindrical positioning rods 10 are integrally formed with the lower positioning plate 2. During use, the cylindrical positioning rods 10 are inserted into the limit holes 7 to form a snap-fit fixation. Both sides of the lower positioning plate 2 are provided with positioning grooves 11.

[0036] Furthermore, the lower positioning plate 2 is integrally formed by 3D printing with carbon fiber material, and its formed structure is an irregularly curved sheet structure. The specific shape of the second conforming surface 9 of the lower positioning plate 2 is customized according to patient data, so as to improve the comfort of the fixing device, keep the patient's neck at a comfortable pitch angle, limit the movement of the patient in the horizontal left-right and head-foot directions, support the back and both sides of the patient's cervical vertebra, the back of the head and the back, improve the comfort during the patient's treatment process and effectively limit the spontaneous displacement, thereby reducing the generation of radiotherapy positioning and setup errors of the head and neck, and further improving the accuracy of radiotherapy.

[0037] As Figure 1 and Figure 6 collectively shown, the inner surface of the upper positioning plate 3 is a third conforming surface 12 conforming to the patient's skin surface. Positioning blocks 13 adapted to the positioning grooves 11 are provided on both sides of the upper positioning plate 3. When it is confirmed through the clinical decision-making port that the patient needs to use the upper positioning plate 3, the upper positioning plate positioning blocks 13 are inserted into the positioning grooves 11 and fixed by clamping, so that the lower positioning plate 2 and the upper positioning plate 3 are relatively fixed. An air vent 14 is also provided on the upper positioning plate 3, which can reduce the pressure on the respiratory and throat parts on the premise of ensuring the effective fixation and positioning of the patient, improve the comfort of the patient, and prevent the discomfort caused by the pressure from causing the patient to be tense and move involuntarily.

[0038] Furthermore, an annular limiting groove 15 is provided inside the limiting hole 7, and a limiting protrusion 16 adapted to the annular limiting groove 15 is provided on the cylindrical positioning rod 10. Through the mutual cooperation of the annular limiting groove 15 and the limiting protrusion 16, the stable connection between the lower positioning plate 2 and the fixed base 1 is further realized.

[0039] Furthermore, the positioning block 13 includes a limiting portion 1301 and a plugging portion 1302 adapted to the positioning groove 11.

[0040] Furthermore, the number of the limiting holes 7 is at least two, and the number of the cylindrical positioning rods 10 is the same as that of the limiting holes 7.

[0041] A customized body surface fixing device for head, neck and shoulder radiotherapy provided by the present invention can be customized and designed for patients. The positions and numbers of the limiting holes, annular limiting grooves, positioning blocks, positioning grooves, etc. used for clamping connection in the device are not unique. When the clinical decision maker marks the target area position, relevant target area positions will be intentionally avoided. If there are special requirements for the target area position and the skin needs to be completely exposed, corresponding-shaped air vents can be designed at the target area position, which will not affect the target area.

[0042] This device is formed by 3D printing with carbon fiber material, has a low CT value, and the ray attenuation rate is lower than 0.7% / mm, having a low impact on the radiotherapy dose.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A customized body surface fixation device for head, neck and shoulder radiotherapy, characterized in that: It includes a fixed base, a lower positioning plate and an upper positioning plate; The fixed base includes a base and latch plates arranged on both sides of the base, the surface of the base is a first conformal curved surface adapted to the outer surface of the lower positioning plate, and the surface of the base is also provided with a plurality of limiting holes; The inner surface of the lower positioning plate is a second conformal curved surface that is completely conformal to the curvature of the back skin surface of the patient's head, shoulders and neck. The outer surface of the lower positioning plate is provided with a cylindrical positioning rod adapted to the limiting hole; both sides of the lower positioning plate are provided with positioning grooves; The inner surface of the upper positioning plate is a third conformal curved surface conforming to the patient's skin surface. Positioning blocks adapted to the positioning grooves are provided on both sides of the upper positioning plate. A vent is also provided on the upper positioning plate.

2. A customized body surface fixation device for head, neck and shoulder radiotherapy according to claim 1, characterized in that: The latch plate is provided with a positioning hole.

3. A customized body surface fixation device for head, neck and shoulder radiotherapy according to claim 1, characterized in that: An annular limiting groove is arranged inside the limiting hole, and a limiting protrusion adapted to the annular limiting groove is arranged on the cylindrical positioning rod.

4. The customized body surface fixation device for head, neck and shoulder radiotherapy according to claim 1, characterized in that: The positioning block comprises a limiting portion and an inserting portion adapted to the positioning groove.

5. The customized body surface fixation device for head, neck and shoulder radiotherapy according to claim 1, characterized in that: The number of the limiting holes is at least two, and the number of the cylindrical positioning rods is the same as the number of the limiting holes.

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