Radiotherapy positioning device with oral cavity protection function

Abstract

The invention discloses a radiotherapy positioning device with an oral cavity protection function, belongs to the technical field of radiotherapy positioning, and provides the following scheme that the radiotherapy positioning device comprises an oral cavity positioning mechanism, an oral cavity treatment auxiliary mechanism is arranged in the oral cavity positioning mechanism, and the oral cavity positioning mechanism comprises an oral cavity positioner structure; one side of the oral cavity positioner structure is connected with a flexible tongue pressing assembly; the tongue depressing adjusting air bag is inflated through the piston assembly, the tongue depressing adjusting air bag is bulged so that the flexible wrapping layer can be adjusted to be attached to the tongue face of a patient, then the flexible wrapping layer is vacuumized and shaped, and therefore self-adaptive deformation adjustment can be conducted according to the shape, thickness and position characteristics of tongues of different patients; according to the tongue depressor, the problem of limiting looseness caused by form mismatching of a traditional rigid tongue depressor is solved, it is ensured that the tongue position is stable in the treatment process, pressing force is dispersed through flexible contact, local tissue of the tongue is prevented from being pressed and damaged, discomfort of a patient in the treatment process is reduced, and the tolerance of the patient to long-time radiotherapy is improved.

Description

Technical Field

[0001] This invention relates to the field of radiotherapy positioning technology, and more particularly to a radiotherapy positioning device with oral cavity protection. Background Technology

[0002] In radiotherapy for head and neck tumors, the oral cavity, as a key area adjacent to the treatment target, needs to be supported and protected by positioning devices. On the one hand, precise oral support can fix the position of soft tissues such as the tongue and gums, preventing tongue displacement due to swallowing and breathing during treatment, ensuring that the radiation beam is accurately focused on the tumor target area, and reducing radiation damage to surrounding normal oral tissues. On the other hand, protecting the integrity of the oral mucosa and tongue surface can reduce the risk of complications such as oral mucositis and xerostomia after radiotherapy, and improve patients' treatment tolerance and quality of life.

[0003] However, the tongue depressors in existing radiotherapy oral positioning devices are mostly fixed rigid structures, which cannot adapt to the differences in the shape and position of the tongue of different patients. This can easily lead to unstable tongue positioning or local discomfort and obstructed blood circulation caused by rigid contact and pressure on the tongue. At the same time, the radiotherapy process is long and the treatment environment is dry, and the moisture on the surface of the tongue can evaporate quickly. Existing devices lack real-time hydration functions, which can easily lead to dry and cracked tongue. This not only aggravates the patient's pain, but may also cause local tissue inflammation due to tongue dryness, affecting the treatment process.

[0004] To address the above problems, this invention proposes a radiotherapy positioning device that protects the oral cavity. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing devices that cannot simultaneously achieve precise tongue fitting and real-time moisturizing protection, resulting in poor oral cavity protection and failing to meet the dual requirements of radiotherapy for positioning accuracy and patient comfort. Therefore, this invention proposes a radiotherapy positioning device that protects the oral cavity.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A radiotherapy positioning device with oral cavity protection includes an oral cavity positioning mechanism, wherein an oral cavity treatment auxiliary mechanism is provided in the oral cavity positioning mechanism;

[0008] The oral cavity positioning mechanism includes an oral cavity positioning device structure, a flexible tongue depressor assembly is connected to one side of the oral cavity positioning device structure, and a tongue surface hydration assembly is provided below the flexible tongue depressor assembly.

[0009] The oral treatment auxiliary mechanism includes a shell, inside which a piston assembly is provided. A tongue depressor connecting piece is provided on one side of the shell, and a tongue depressor adjusting airbag is fixedly connected below the tongue depressor connecting piece. The tongue depressor adjusting airbag is connected to the shell through an adjusting valve assembly. The shell is connected to an infusion tube, and the infusion tube is connected to the water outlet connector structure of the tongue surface water replenishment component.

[0010] Preferably, the oral cavity locator structure is provided with an oral cavity positioning ring, and the oral cavity locator structure is also provided with two operating handles.

[0011] Preferably, a housing guide rail is fixedly connected to the bottom wall of the inner cavity of the oral cavity locator structure, and the housing guide rail is provided with a docking groove.

[0012] Preferably, one end of the docking groove is an open end, and the other end of the docking groove is a closed end.

[0013] Preferably, the flexible tongue depressor assembly includes a flexible wrapping layer, and the interior of the flexible wrapping layer is provided with a plurality of shapeable flexible sheets.

[0014] Preferably, an exhaust pipe connector structure is connected above the flexible wrapping layer, and the exhaust pipe connector structure is disposed through the outer shell guide rail.

[0015] Preferably, the tongue surface hydration component includes a penetrating layer tongue surface contact surface, which is installed below the flexible wrapping layer. A water outlet connector structure is provided on one side of the penetrating layer tongue surface contact surface, and the water outlet connector structure is provided through the oral cavity locator structure.

[0016] Preferably, the lower part of the outer casing is provided with scale markings, and a docking guide strip is fixedly connected to the lower part of the outer casing, the docking guide strip being adapted to the docking groove.

[0017] Preferably, the piston assembly includes an operating rod that passes through the housing and is fixedly connected to the piston structure. The piston structure is located inside the housing, and the housing is provided with a water injection connector. A suspension ring is fixedly connected to the pressure tongue connecting piece, and the suspension ring is used to hang on the suspension structure.

[0018] Preferably, the regulating valve assembly includes a connecting pipe, the two ends of which are connected to the housing and the pressure tongue regulating airbag, and a control valve is provided on the connecting pipe.

[0019] Compared with the prior art, the present invention provides a radiotherapy positioning device that protects the oral cavity, and has the following beneficial effects:

[0020] 1. This radiotherapy positioning device with oral cavity protection uses a piston assembly to inflate the tongue depressor adjustment airbag. The inflated airbag allows the flexible wrapping layer to be lowered to fit the patient's tongue. The flexible wrapping layer is then vacuumed and shaped, allowing for adaptive deformation adjustment according to the shape, thickness, and position of different patients' tongues. This avoids the problem of loosening caused by shape mismatch in traditional rigid tongue depressors, ensuring the stability of the tongue position during treatment. Furthermore, the flexible contact disperses the pressure, preventing pressure damage to local tongue tissues, reducing patient discomfort during treatment, and improving patient tolerance to long-term radiotherapy.

[0021] 2. This radiotherapy positioning device with oral cavity protection allows liquid in the outer shell to be replenished to the patient's tongue surface through the tongue surface hydration component by hanging the suspension ring on the suspension structure. This enables real-time hydration of the tongue surface during radiotherapy, effectively preventing dryness of the tongue, maintaining the moisture of the tongue mucosa, reducing the irritation of the oral mucosa to radiotherapy, and thus reducing the risk of oral complications. Furthermore, the movement speed of the piston structure can be controlled by the regulating valve component, thereby adjusting the amount of hydration to meet the tongue surface hydration requirements as needed.

[0022] 3. This radiotherapy positioning device with oral cavity protection uses a piston assembly to inflate the tongue depressor adjustment airbag. The expansion of the tongue depressor adjustment airbag adjusts the position of the flexible tongue depressor component, allowing it to precisely fit the patient's tongue surface. After fitting, the flexible tongue depressor component is vacuum-sealed and shaped, ensuring that the tongue surface hydration component precisely aligns with the tongue surface. This method, by precisely limiting the tongue surface, maintains a stable tongue posture, ensuring that the hydration channel outlet is always aligned with the key areas of the tongue surface that require moisturization. It avoids deviations in hydration position due to tongue displacement, ensuring the stability of the hydration effect. The two work together to effectively ensure the precision of radiotherapy. Attached Figure Description

[0023] Figure 1 This is a perspective view of a radiotherapy positioning device with oral cavity protection proposed in this invention;

[0024] Figure 2 This is a perspective view of the outer shell and oral cavity locator structure of a radiotherapy positioning device with oral cavity protection proposed in this invention;

[0025] Figure 3 This is a perspective view of the oral cavity locator structure of a radiotherapy positioning device with oral cavity protection proposed in this invention;

[0026] Figure 4 This is a cross-sectional perspective view of a flexible tongue depressor assembly of a radiotherapy positioning device with oral cavity protection proposed in this invention.

[0027] Figure 5 In this invention Figure 4 Enlarged view of point A;

[0028] Figure 6 This is a perspective view of the housing of a radiotherapy positioning device with oral cavity protection proposed in this invention;

[0029] Figure 7 This is a cross-sectional perspective view of the housing of a radiotherapy positioning device with oral cavity protection proposed in this invention;

[0030] Figure 8 This is a perspective view of the suspended state of a radiotherapy positioning device with oral cavity protection proposed in this invention.

[0031] In the diagram: 100, Oral cavity positioning mechanism; 101, Oral cavity locator structure; 102, Tongue surface water replenishment component; 1021, Tongue surface contact surface of the penetrating layer; 1022, Water outlet connector structure; 103, Oral cavity positioning ring; 104, Operating handle; 105, Outer shell guide rail; 106, Flexible tongue depressor component; 1061, Flexible wrapping layer; 1062, Shapeable flexible sheet; 1063, Exhaust pipe connector structure; 107, Docking groove; 200 1. Oral treatment auxiliary mechanism; 201. Outer shell; 202. Piston assembly; 2021. Operating lever; 2022. Piston structure; 203. Docking guide bar; 204. Scale markings; 205. Tongue depressor adjustment airbag; 206. Water injection connector; 207. Tongue depressor connecting piece; 208. Adjusting valve assembly; 2081. Connecting pipe; 2082. Control valve; 209. Suspension ring; 210. Infusion tube; 300. Suspension structure. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Example 1: Refer to Figures 1-8 A radiotherapy positioning device with oral cavity protection includes an oral cavity positioning mechanism 100, in which an oral cavity treatment auxiliary mechanism 200 is provided.

[0035] The oral positioning mechanism 100 includes an oral positioning device structure 101, on which an oral positioning ring 103 is provided. By placing the oral positioning device structure 101 in the patient's oral cavity, the oral positioning ring 103 engages between the gums and lips, thus providing a limiting function. The oral positioning device structure 101 is also provided with two operating handles 104, which provide operating points for medical personnel, allowing them to smoothly place the oral positioning device structure 101 in the patient's oral cavity. A housing guide rail 105 is fixedly connected to the bottom wall of the inner cavity of the oral positioning device structure 101. The housing guide rail 105 has a docking groove 107, one end of which is open and the other end of which is closed. The docking guide bar 203 smoothly enters the docking groove 107 through the open end, and the docking guide bar 203 is easy to move through the closed end of the docking groove 107. The tongue depressor can be positioned at the closed end to ensure precise correspondence between the tongue depressor adjustment airbag 205 and the flexible wrapping layer 1061. A flexible tongue depressor assembly 106 is connected to one side of the oral cavity locator structure 101. The flexible tongue depressor assembly 106 includes a flexible wrapping layer 1061. Multiple shapeable flexible sheets 1062 are provided inside the flexible wrapping layer 1061. The shapeable flexible sheets 1062 are deformable, allowing the tongue surface contact surface 1021 of the permeable layer to be adjusted downwards to precisely fit the patient's tongue surface. An exhaust pipe connector structure 1063 is connected above the flexible wrapping layer 1061. The exhaust pipe connector structure 1063 can be connected to a vacuum device, which then evacuates the flexible wrapping layer 1061, causing the shapeable flexible sheets 1062 to fit tightly together, thus providing a shaping effect and ensuring stable contact with the tongue surface. The exhaust pipe connector structure 1063 is provided through the outer shell guide rail 105. A tongue surface water replenishment assembly 102 is provided below the flexible tongue depressor assembly 106.

[0036] The oral treatment auxiliary device 200 includes a housing 201. A scale mark 204 is provided on the lower part of the housing 201, clearly indicating the internal liquid level. A docking guide strip 203 is fixedly connected to the lower part of the housing 201, and the docking guide strip 203 is adapted to the docking groove 107. A piston assembly 202 is provided inside the housing 201. The piston assembly 202 includes an operating rod 2021, which allows medical personnel to easily control the movement of the piston structure 2022. The operating rod 2021 passes through the housing 201 and is fixedly connected to the piston structure 2022. Structure 2022 is housed in housing 201. A tongue depressor connecting piece 207 is provided on one side of housing 201. A tongue depressor regulating airbag 205 is fixedly connected to the lower part of tongue depressor connecting piece 207. The tongue depressor regulating airbag 205 is connected to housing 201 through regulating valve assembly 208. Regulating valve assembly 208 includes connecting pipe 2081. Both ends of connecting pipe 2081 are connected to housing 201 and tongue depressor regulating airbag 205. A control valve 2082 is provided on connecting pipe 2081. Housing 201 is connected to infusion pipe 210. Infusion pipe 210 is connected to water outlet pipe connector structure 1022 of tongue surface water replenishment component 102.

[0037] In this embodiment: by pushing the outer shell 201 into the oral cavity locator structure 101, the tongue depressor connecting piece 207 drives the tongue depressor adjusting airbag 205 into the oral cavity. Then, the operating rod 2021 is pushed, causing the operating rod 2021 to drive the piston structure 2022 to move. The piston structure 2022 forces the gas from the outer shell 201 into the tongue depressor adjusting airbag 205 through the connecting pipe 2081. The tongue depressor adjusting airbag 205 inflates and lowers the flexible wrapping layer 1061 and the shape-adjustable flexible sheet 1062, so that the tongue contact surface 1021 of the permeable layer fits against the patient's tongue surface. Then, the flexible wrapping layer 1061 is vacuumed and shaped. In this way, adaptive deformation adjustment can be performed according to the shape, thickness and position characteristics of different patients' tongues, avoiding the problem of limiting loosening caused by the shape mismatch of traditional rigid tongue depressors. This ensures the stability of the tongue position during treatment, and the pressure is dispersed by flexible contact, avoiding pressure damage to local tongue tissues, reducing patient discomfort during treatment, and improving patient tolerance to long-term radiotherapy.

[0038] Example 2: Refer to Figure 2 , Figure 4 and Figures 6-8A radiotherapy positioning device with oral cavity protection includes a tongue surface hydration component 102. The tongue surface hydration component 102 includes a permeable tongue surface contact surface 1021, which is installed below a flexible wrapping layer 1061. A water outlet connector structure 1022 is provided on one side of the permeable tongue surface contact surface 1021. The water outlet connector structure 1022 can be connected to an infusion tube 210, allowing liquid to smoothly pass through the infusion tube 210 into the water outlet connector structure 1022 and replenish water to the patient's tongue surface through the permeable tongue surface contact surface 1021, keeping the tongue surface moist, thereby facilitating radiotherapy operations. The water outlet connector structure 1022 is provided through an oral cavity locator structure 101.

[0039] The piston assembly 202 includes an operating rod 2021, which passes through the housing 201 and is fixedly connected to the piston structure 2022. The piston structure 2022 is located in the housing 201. A water injection connector 206 is provided on the housing 201. A suspension ring 209 is fixedly connected to the pressure tongue connecting piece 207. The suspension ring 209 is used to hang on the suspension structure 300.

[0040] The regulating valve assembly 208 includes a connecting pipe 2081, the two ends of which are connected to the outer shell 201 and the tongue depressor regulating airbag 205. A control valve 2082 is provided on the connecting pipe 2081. By operating the control valve 2082, the opening size of the connecting pipe 2081 can be controlled, thereby adjusting the air intake and controlling the rate of water replenishment as needed to prevent discomfort to the patient. A water injection connector 206 is provided on the outer shell 201, through which a water source can be connected to facilitate the injection of water into the outer shell 201. A suspension ring 209 is fixedly connected to the tongue depressor connecting piece 207. By hanging the suspension ring 209 on the suspension structure 300, it is convenient to perform subsequent water replenishment on the patient's tongue. The suspension ring 209 is used to hang on the suspension structure 300.

[0041] In this embodiment: by hanging the suspension ring 209 on the suspension structure 300, the liquid in the outer shell 201 can flow downward through the infusion tube 210 and enter the tongue contact surface 1021 of the permeation layer through the water outlet connector structure 1022, so that water can be replenished to the tongue surface. This allows for real-time hydration of the tongue surface during radiotherapy, effectively preventing the tongue from drying out, maintaining the moisture of the tongue mucosa, reducing the stimulation of the oral mucosa by radiotherapy, and thus reducing the risk of oral complications. Furthermore, the opening size of the connecting pipe 2081 can be adjusted by using the control valve 2082, and the moving speed of the piston structure 2022 can be controlled by controlling the air intake, thereby adjusting the amount of water replenished and meeting the hydration requirements of the tongue surface as needed.

[0042] Example 3: Reference Figures 1-2 and Figures 6-7 A radiotherapy positioning device with oral cavity protection includes an oral cavity positioning mechanism 100, an oral cavity treatment auxiliary mechanism 200 is provided in the oral cavity positioning mechanism 100, the oral cavity positioning mechanism 100 includes an oral cavity locator structure 101, a flexible tongue depressor component 106 is connected to one side of the oral cavity locator structure 101, and a tongue surface hydration component 102 is provided below the flexible tongue depressor component 106.

[0043] The oral treatment auxiliary device 200 includes a housing 201, a piston assembly 202 is provided inside the housing 201, a tongue depressor connecting piece 207 is provided on one side of the housing 201, a tongue depressor adjusting airbag 205 is fixedly connected below the tongue depressor connecting piece 207, the tongue depressor adjusting airbag 205 is connected to the housing 201 through an adjusting valve assembly 208, the housing 201 is connected to an infusion tube 210, and the infusion tube 210 is connected to the water outlet connector structure 1022 of the tongue surface water replenishment component 102.

[0044] In this embodiment: the piston assembly 202 inflates the tongue depressor adjustment airbag 205, and the expansion of the tongue depressor adjustment airbag 205 adjusts the position of the flexible tongue depressor assembly 106, so that the flexible tongue depressor assembly 106 is precisely attached to the patient's tongue surface. After attachment, the flexible tongue depressor assembly 106 is vacuumed and shaped, so that the tongue surface hydration assembly 102 is precisely aligned with the tongue surface. This method, by precisely limiting the tongue surface, can keep the tongue in a stable position, ensuring that the hydration channel outlet is always aligned with the key area of ​​the tongue surface that needs moisturizing, avoiding deviation of the hydration position due to tongue displacement, and ensuring the stability of the hydration effect. The two work together to effectively ensure the accuracy of radiotherapy.

[0045] Working principle: When locating the tongue, the oral cavity locator structure 101 is placed in the patient's mouth beforehand by the operating handle 104. Then, the outer shell 201 is placed in the oral cavity locator structure 101, and the docking guide strip 203 enters the docking groove 107, so that the docking guide strip 203 moves to the closed end limit of the docking groove 107. At this time, the tongue depressor airbag 205 corresponds to the flexible wrapping layer 1061. Then, the operating rod 2021 is pushed, so that the operating rod 2021 drives the piston structure 2022 to move. The piston structure 2022 inputs the gas from the outer shell 201 into the tongue-pressing regulating airbag 205 through the connecting pipe 2081, causing the tongue-pressing regulating airbag 205 to expand and press down the flexible wrapping layer 1061, so that the tongue contact surface 1021 of the permeable layer can be adjusted to fit against the patient's tongue surface. Then, the exhaust pipe connector structure 1063 is connected to the vacuum equipment, so that the flexible wrapping layer 1061 is evacuated and the shape-fixing flexible sheet 1062 is tightly fitted for shaping and retention. Then the outer shell 201 is removed, and then the patient is given radiotherapy.

[0046] When hydration is needed, a water source is connected via the water inlet connector 206, and the operating lever 2021 is pushed to move the piston structure 2022, causing the liquid to be drawn into the outer casing 201 for storage. The infusion tube 210 is then connected to the outlet pipe connector structure 1022, and the tube is hung on the suspension structure 300 via the suspension ring 209. The opening size of the connecting pipe 2081 is adjusted by the control valve 2082 to control the amount of hydration, allowing the liquid to enter the tongue contact surface 1021 of the permeable layer through the outlet pipe structure, thereby hydrating the patient's tongue and facilitating subsequent radiotherapy.

[0047] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A radiotherapy positioning device with protection of the oral cavity, comprising an oral cavity positioning mechanism (100), characterized in that, The oral positioning mechanism (100) is provided with an oral treatment auxiliary mechanism (200); The oral positioning mechanism (100) comprises an oral positioning device structure (101), one side of the oral positioning device structure (101) is connected with a flexible tongue pressing assembly (106), and the lower portion of the flexible tongue pressing assembly (106) is provided with a tongue surface water supplement assembly (102); The oral treatment auxiliary mechanism (200) comprises a shell (201), the inside of the shell (201) is provided with a piston assembly (202), one side of the shell (201) is provided with a tongue pressing connecting piece (207), the lower portion of the tongue pressing connecting piece (207) is fixedly connected with a tongue pressing adjusting air bag (205), the tongue pressing adjusting air bag (205) is connected with the shell (201) through an adjusting valve assembly (208), the shell (201) is communicated with a liquid delivery pipe (210), and the liquid delivery pipe (210) is communicated with a water outlet pipe joint structure (1022) of the tongue surface water supplement assembly (102).

2. A radiotherapy positioning device with oral cavity protection according to claim 1, wherein, The oral positioning device structure (101) is provided with an oral positioning ring (103), and the oral positioning device structure (101) is also provided with two operation handles (104).

3. The radiotherapy positioning device with oral cavity protection of claim 1, wherein, The bottom wall of the inner cavity of the oral positioning device structure (101) is fixedly connected with a shell guide rail (105), and the shell guide rail (105) is provided with a butt joint sliding groove (107).

4. A radiotherapy positioning device with oral cavity protection according to claim 3, wherein, One end of the butt joint sliding groove (107) is an open end, and the other end of the butt joint sliding groove (107) is a closed end.

5. The radiotherapy positioning device with oral cavity protection of claim 3, wherein, The flexible tongue pressing assembly (106) comprises a flexible wrapping layer (1061), and the inside of the flexible wrapping layer (1061) is provided with a plurality of shapeable flexible sheets (1062).

6. A radiotherapy positioning device with oral cavity protection according to claim 5, wherein, The upper portion of the flexible wrapping layer (1061) is communicated with an exhaust pipe joint structure (1063), and the exhaust pipe joint structure (1063) is arranged through the shell guide rail (105).

7. A radiotherapy positioning device with oral cavity protection according to claim 6, wherein, The tongue surface water supplement assembly (102) comprises a permeation layer tongue surface contact surface (1021), the permeation layer tongue surface contact surface (1021) is arranged below the flexible wrapping layer (1061), one side of the permeation layer tongue surface contact surface (1021) is provided with a water outlet pipe joint structure (1022), and the water outlet pipe joint structure (1022) is arranged through the oral positioning device structure (101).

8. The radiotherapy positioning device with oral cavity protection of claim 3, wherein, The lower portion of the shell (201) is provided with a scale line mark (204), and the lower portion of the shell (201) is fixedly connected with a butt joint guide strip (203) which is matched with the butt joint sliding groove (107).

9. The radiotherapy positioning device with oral cavity protection of claim 1, wherein, The piston assembly (202) comprises an operation rod (2021), the operation rod (2021) penetrates into the shell (201) and is fixedly connected with a piston structure (2022), the piston structure (2022) is arranged in the shell (201), the shell (201) is provided with a water injection connector (206), the tongue pressing connecting piece (207) is fixedly connected with a suspension lifting ring (209), and the suspension lifting ring (209) is used for being hung on a suspension structure (300).

10. The radiotherapy positioning device with oral cavity protection of claim 1, wherein, The adjusting valve assembly (208) comprises a connecting pipe (2081), both ends of the connecting pipe (2081) are communicated with the shell (201) and the tongue pressing adjusting air bag (205), and a control valve (2082) is arranged on the connecting pipe (2081).

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