Body position fixing bag for whole body radiotherapy
By incorporating silicone compensator layer and foam particles in the vacuum fixing bag, the problem of position error and inaccurate irradiation in whole body radiation therapy is solved, and simpler operation and higher treatment accuracy are achieved, suitable for patients with reduced mobility Risks and side effects of falling bed.
Patent Information
- Application Number
- CN202420735433.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-10
AI Technical Summary
During the whole body radiation therapy process, traditional vacuum fixing bags lead to inaccurate position errors and irradiation doses in patients, especially for patients with mobility inconvenience and prone to position errors, affecting the treatment effect.
A position fixing bag including the surface layer and the inner layer was designed. The intermediate interlayer was equipped with a tissue compensator layer for radiotherapy. The foam particles were hardened and fixed by vacuuming. The built-in silicone compensator layer covered the patient's side back, simplifying operation and reducing position. error.
It realizes simple operation without pre-covering tissue compensators, reduces position errors, improves the accuracy of radiotherapy doses and patient comfort, and is especially suitable for patients with reduced mobility, reducing the risk of falling beds and treatment side effects.
Smart Images
Figure CN222286254U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a body position fixing bag used for whole body radiotherapy. Background Art
[0002] Chinese patent document CN204319525U discloses a vacuum fixation bag, which includes a bag body, the bag body is connected to an air nozzle, and foam particles are arranged in the bag body. During radiotherapy, a vacuum fixation bag similar to the above scheme is usually used to fix the patient on the treatment bed board to achieve the effect of precise positioning. However, during whole-body radiotherapy, X-rays usually form a built-up area in the patient's body, the surface irradiation dose is low, and the total irradiation dose of the patient is high, which affects the endangered organs. Therefore, when the patient lies on the vacuum fixation bag, a layer of tissue compensation (such as a silicone compensation block) is often coated on the surface of the body. Under the action of the tissue compensation, the built-up area can be moved from the body to the surface of the body, which can reduce the built-up area of X-rays in the patient's body, increase the surface irradiation dose, reduce the total irradiation dose of the patient, and protect the endangered organs. However, since both the front and back sides of the patient's body have to be covered, the patient's entire body is usually wrapped with tissue compensation material before being allowed to lie on the vacuum bag. However, this is obviously not friendly enough for some patients with limited mobility, and there are certain inconveniences in operation. Alternatively, a layer of tissue compensation material is spread on the vacuum bag, and the patient is allowed to lie on the vacuum bag and then a layer of tissue compensation material is spread on the front side of the patient. Although this method is relatively convenient, because the tissue compensation material spread on the vacuum bag cannot be fixed, it is easy to move after the patient lies down, resulting in some positioning errors, which increases the position error during radiotherapy and causes deviations in radiotherapy doses. Utility Model Content
[0003] The utility model aims to provide a vacuum fixing bag which does not require the patient to be covered with tissue compensation material all over the body before lying down and can reduce the position error during radiotherapy.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solution: a body position fixation bag for whole body radiotherapy, including a bag body, the bag body including a surface layer and an inner layer, and a radiotherapy tissue compensation layer is arranged between the surface layer and the inner layer.
[0005] The tissue compensation layer for radiotherapy can be clamped between the surface layer and the inner layer, or the interlayer between the surface layer and the inner layer can be filled, which is conducive to ensuring the accuracy of the dose. Generally speaking, the body position fixing bag also includes foam particles and an air nozzle.
[0006] Furthermore, the bag body includes a head area, a trunk area, an upper limb area and a lower limb area corresponding to various parts of the human body. By setting the bag body shape to be similar to the shape of the human body, it is helpful to control the position of the patient lying down each time, and the fixed bag with a shape similar to the human body can also fit the patient better, making it easier to perform shaping operations after vacuuming.
[0007] Furthermore, the upper limb area and the lower limb area are both provided with adjustable restraints. By fixing the patient's limbs with the restraints, the risk of falling out of bed during treatment of the patient (especially young patients) can be reduced to a certain extent.
[0008] Furthermore, the binding belt is provided with scales, and the binding belt with scales can ensure the repeatability of the positions of the patient's limbs during each treatment.
[0009] Furthermore, the coverage area of the radiotherapy tissue compensation layer is at least equivalent to the area of the bag body that is used to contact the human body, that is, the radiotherapy tissue compensation layer is configured to at least cover the area of the bag body that is used to contact the human body. Of course, the radiotherapy tissue compensation layer can cover the entire area of the bag body, but in order to reduce costs, it can also cover only the area of the bag body that is used to contact the human body.
[0010] Furthermore, the tissue compensation layer for radiotherapy is a silicone compensation layer. The silicone compensation layer is made of silicone, and its density may be 1.03 g / ml and its thickness may be 2 mm.
[0011] Furthermore, the surface layer and the inner layer are both soft fabrics and at least the surface layer is waterproof fabric. Generally speaking, the surface layer and the inner layer are both waterproof soft fabrics, such as Oxford cloth TPU composite fabric, which can play a waterproof role, and the texture is softer and more suitable for skin contact.
[0012] The above-mentioned body position fixing bag for whole body radiotherapy is actually used, and the patient can lie on the fixing bag, and then the gas inside the fixing bag is evacuated to form a negative pressure inside the fixing bag, and the foam particles inside the fixing bag are assembled and hardened under the extrusion of the vacuum, which plays a role of shaping, and has a certain strength after shaping, so as to fix and support the human body or limbs. The utility model combines the tissue compensator for radiotherapy into the bag body of the fixing bag, and arranges it between the surface layer and the inner layer of the bag body, so that the tissue compensator for radiotherapy can be deformed with the bag body and fit the human body. In this way, after the human body is fixed by the fixing bag, the side and back of the human body can be covered with the tissue compensator for radiotherapy, so that only the tissue compensator needs to be covered on the front of the human body, which is not only simpler and more convenient in operation, but also does not need to cover the whole body with tissue compensators before the patient lies down, which is more friendly to some patients with limited mobility, and the tissue compensator built into the fixing bag will not move after the patient lies down, which can reduce the position error during radiotherapy and improve the accuracy of radiotherapy dose. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of a body position fixing bag;
[0014] Figure 2 is a cross-sectional view of a body positioning bag;
[0015] Figure 3 Cross-section of a human body lying on a body fixation bag Figure 1 ;
[0016] Figure 4 Cross-section of a human body lying on a body fixation bag Figure 2 .
[0017] In the figure:
[0018] 1——Bag body 1a——Surface layer
[0019] 1b——Inner layer 1c——Tissue compensation layer for radiotherapy
[0020] 1d - head area 1e - trunk area
[0021] 1f——Upper limb area 1h——Lower limb area
[0022] 2——Binding belt 3——Foam particles
[0023] 4——Silicone compensation block 5——Human body
[0024] 6—Human lower limbs. DETAILED DESCRIPTION
[0025] In the description of the present invention, it should be understood that the terms "front", "rear", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The term "plurality" means more than two (including two).
[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.
[0027] like Figure 1-4As shown, this embodiment provides a body position fixing vacuum bag for whole body radiotherapy, which can be applied to whole body radiotherapy using VMAT technology. The vacuum bag mainly includes a waterproof and airtight bag body 1, the interior of the bag body 1 is filled with spherical elastic foam particles 3 (for example, polystyrene spherical foam particles with a diameter of about 2 mm), and the bag body 1 is connected to a gas nozzle or a negative pressure exhaust valve for vacuuming.
[0028] The bag body 1 in this embodiment no longer adopts the traditional single-layer structure, but adopts a sandwich structure. Figure 2 As shown, the bag body 1 mainly includes a surface layer 1a and an inner layer 1b, and a radiotherapy tissue compensation layer 1c is arranged between the surface layer 1a and the inner layer 1b. The radiotherapy tissue compensation layer 1c is mainly used to move the built-up area of X-rays in the patient's body outward, so that as much as possible, it can reduce the built-up area of X-rays in the patient's body, increase the surface irradiation dose, reduce the patient's total irradiation dose, and better protect the endangered organs.
[0029] The tissue compensation material layer 1c for radiotherapy in this embodiment can be made of silicone compensator, which is mainly made of silicone, with a density of 1.03g / ml and a thickness of 2mm. Compared with directly contacting the patient's body surface with such silicone compensation block 4 (silicone compensator), the silicone compensator is built into the bag body 1, and indirectly contacts the patient through the bag body 1, which will be more comfortable and reduce the built-up area of X-rays in the patient's body. It will be more patient-friendly, especially for some young patients, and can reduce their resistance to treatment due to discomfort.
[0030] The surface layer 1a and the inner layer 1b are both made of relatively soft fabrics, and at least the surface layer 1a is waterproof. Generally speaking, the surface layer 1a and the inner layer 1b can be relatively soft waterproof fabrics, such as Oxford cloth TPU composite fabrics, which can play a waterproof role and are relatively soft and more suitable for skin contact. Of course, the surface layer 1a and the inner layer 1b can also be polyvinyl chloride (PVC) nylon reinforced composite membrane materials.
[0031] In this embodiment, the tissue compensator for radiotherapy is incorporated into the bag body 1 of the fixing bag and arranged between the surface layer 1a and the inner layer 1b of the bag body 1, so that the tissue compensator for radiotherapy can be deformed together with the bag body 1 and fit the human body. In this way, after the human body is fixed by the fixing bag, the side and back of the human body can be covered with the tissue compensator for radiotherapy (see the attached Figure 3-4), in this way, it is only necessary to cover the front part of the human body with a silicone compensation block 4 (i.e., tissue compensation material for radiotherapy). This is not only simpler and more convenient in operation, but also does not require the patient to be fully covered with tissue compensation material before lying down. This is more friendly to some patients with limited mobility, and the tissue compensation material built into the fixed bag will not move after the patient lies down, which can reduce the position error during radiotherapy and improve the accuracy of radiotherapy dose.
[0032] Those skilled in the art should understand that although the bag body 1 of this structure can only reduce the direct contact of the patient's sides and back with the silicone compensation block 4, compared with directly covering the entire body with the silicone compensation block 4, at least the comfort of the patient's sides and back is improved. Therefore, in this embodiment, it is regarded as improving comfort.
[0033] For the bag body 1, the coverage area of the built-in radiotherapy tissue compensation layer 1c should be at least equivalent to the area of the bag body 1 that is used to contact the human body, that is, the radiotherapy tissue compensation layer 1c should at least cover the area of the bag body 1 that is used to contact the human body. Generally speaking, the radiotherapy tissue compensation layer 1c can cover the entire area of the bag body 1, but in order to reduce costs, it can also only cover the area of the bag body 1 that is used to contact the human body.
[0034] Among them, the tissue compensation layer 1c for radiotherapy can be connected to the surface layer 1a and the inner layer 1b through an adhesive, and of course it can also be clamped between the surface layer 1a and the inner layer 1b, or fill the interlayer between the surface layer 1a and the inner layer 1b by filling, which is conducive to ensuring the accuracy of the dose.
[0035] Different from the existing vacuum fixing belt, the bag body 1 in this embodiment is no longer in the common rectangular shape, but is designed according to the shape of the human body, and is set to a shape equivalent to the human body. The bag body 1 may include a head area 1d, a trunk area 1e, an upper limb area 1f and a lower limb area 1d corresponding to various parts of the human body (head, trunk 5, upper limbs, lower limbs 6), which can be seen in Figure 1 The bag body 1 designed to be in the same shape as the human body can better fit the human body. The patient lies on the corresponding area according to the distribution of the body parts. After vacuuming, the bag body 1 almost fits the patient's body (the corresponding area fits the corresponding part. The schematic diagram of the bag body 1 fitting the torso 5 and the lower limbs 6 can be seen in Figure 3-4 ), the technician can easily shape it so that the bag body 1 presents a shape comparable to the patient's body. Moreover, the shape of the bag body 1 corresponds to the shape of the human body, which can facilitate the patient to lie in almost the same position every time, further ensuring the effect of precise positioning. In addition, since the fixation bag is reusable, fixation bags of different sizes can be designed according to patients of different shapes (for example, children, adults, and elderly patients), so that the adaptability will be higher.
[0036] Among them, the upper limb area 1f and the lower limb area 1d can also be provided with adjustable straps 2, and the patient's limbs can be fixed by the straps 2, which can reduce the risk of patients (especially young patients) falling out of bed during treatment to a certain extent. Furthermore, scales can be set on the straps 2, so that the position repeatability of the patient's limbs can be ensured during each treatment. In addition, the straps 2 can be fixed by Velcro.
[0037] The specific method of using the body position fixation bag (ie, vacuum bag) for whole body radiotherapy in this embodiment is as follows:
[0038] Step 1: Open the air nozzle or exhaust valve of the vacuum bag to make the internal and external atmospheric pressures consistent and keep the vacuum bag in a soft state;
[0039] Step 2: Lay the soft vacuum bag flat on the integrated positioning plate;
[0040] Step 3: Place the patient on the vacuum bag and let the patient put his head, torso and limbs into the corresponding position of the vacuum bag in the most comfortable position;
[0041] Step 4: Connect the vacuum pump to the air nozzle or the air extraction valve to extract some of the air inside the vacuum bag, so that the vacuum bag is in a plastic state;
[0042] Step 5: The technician shapes the vacuum bag according to the patient's actual position, trying to ensure that the patient's entire body, especially the limbs, fits the surface of the vacuum bag;
[0043] Step 6: Continue to turn on the vacuum pump to extract all the air in the vacuum bag, so that it is in a vacuum fixed state, so as to achieve the purpose of fixing the patient's position;
[0044] The upper surface (i.e., front) of the patient can also be covered with a silicone compensating block, see Figure 3-4 .
[0045] Step 7: Use the limb restraints 2 with scales to fix the patient's limbs, and record the scale positions during positioning to ensure that the position repeatability is consistent during each treatment;
[0046] Step 8: After marking the treatment reference points on the vacuum pad using a positioning laser light, start the CT simulation positioning scan.
[0047] In general, the utility model has a simple structure, good radiation penetration, is easy to clean, and uses vacuum to fix the patient's position as a whole, which can achieve the effect of fixing the body and limbs separately when the patient receives whole-body radiotherapy. At the same time, the personalized design of the radiotherapy tissue compensation material (silicone) built into the bag body 1 can reduce the built-up area of X-rays in the patient's body, increase the surface irradiation dose, reduce the patient's total irradiation dose, and better protect the endangered organs. Moreover, such a design can also increase the comfort of patients during treatment, especially young children are more likely to accept it, ensure the consistency of positioning repeatability during each treatment, reduce the dose uncertainty and side effects caused by changes in the patient's position during treatment, and thus improve the treatment effect. In addition, the limb fixation belt (restraint belt 2) in the utility model can not only ensure the repeatability of the position of the patient's limbs during each treatment, but also reduce the risk of falling out of bed for young children during treatment to a certain extent.
[0048] The above is only the preferred implementation of the utility model, and does not constitute any form of limitation on the utility model. Although the utility model has been disclosed as the preferred embodiment as above, it is not used to limit the product form and style of the utility model. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments with equivalent changes without departing from the scope of the technical solution of the utility model. All contents that do not depart from the technical solution of the utility model belong to the patent scope of the technical solution of the utility model.
Claims
1. A body position fixation bag for whole body radiotherapy, comprising a bag body (1), characterized in that: The bag body (1) comprises a surface layer (1a) and an inner layer (1b), and a tissue compensation layer (1c) for radiotherapy is arranged between the surface layer (1a) and the inner layer (1b).
2. The body position fixation bag for whole body radiotherapy according to claim 1, characterized in that: The bag body (1) comprises a head area (1d), a trunk area (1e), an upper limb area (1f) and a lower limb area (1h).
3. The body position fixation bag for whole body radiotherapy according to claim 2, characterized in that: The upper limb area (1f) and the lower limb area (1h) are both provided with adjustable restraint belts (2).
4. The body position fixation bag for whole body radiotherapy according to claim 3, characterized in that: The restraining belt (2) is provided with scales.
5. The body position fixation bag for whole body radiotherapy according to claim 1, characterized in that: The coverage area of the radiotherapy tissue compensation layer (1c) is at least equivalent to the area of the bag body (1) that is used to contact the human body.
6. The body position fixation bag for whole body radiotherapy according to any one of claims 1 to 5, characterized in that: The tissue compensation layer (1c) for radiotherapy is a silicone compensation layer.
7. The body position fixation bag for whole body radiotherapy according to any one of claims 1 to 5, characterized in that: The surface layer (1a) and the inner layer (1b) are both made of soft fabrics, and at least the surface layer (1a) is made of waterproof fabric.