An inflatable fixation device for head CT examination

Abstract

The utility model provides a kind of inflatable fixing device for head CT examination, it solves the problems such as CT scanning head fixation, it includes fixed head frame, inflatable restraint belt is fixed in fixed head frame inside through magic tape, inflatable restraint belt is connected with manual air pump by inflation pipe, and manual air distribution assembly is arranged between inflatable restraint belt and inflation pipe. The utility model has the advantages of simple operation, convenient reuse etc.

Description

Technical Field

[0001] This utility model belongs to the field of fixation bracket technology, specifically relating to an inflatable fixation device for head CT examination. Background Technology

[0002] Existing CT examination tables are typically equipped with specially designed headrests. These headrests are generally made of soft, malleable materials (such as sponge). Their shape conforms to the physiological curves of the human head, fitting well against the back and sides. When the patient lies down, their head rests on the headrest, which provides stable support. Some headrests also have adjustable angle mechanisms. By adjusting the angle of the headrest, the patient's head can be positioned for optimal scanning. For example, during a transverse scalar scan, the headrest can be adjusted to position the patient's head in the midsagittal plane, ensuring the scanning plane accurately passes through all structures of the brain. However, the fixed size of these specialized headrests cannot provide adequate restraint for uncooperative individuals (children, Alzheimer's patients, stroke victims, or those with impaired consciousness due to traumatic brain injury). This can result in CT images that do not meet diagnostic requirements, often necessitating repeated scans, increasing radiation doses, and impacting the patient's health.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a head CT scan fixator [201610733013.9], which includes a fixation base body with a U-shaped fixing groove inside. Several shock-absorbing springs are provided on the bottom side of the U-shaped fixing groove. The shock-absorbing springs are fixedly connected to the fixation base body. Each shock-absorbing spring has a head support plate at its upper end. The upper surface of the head support plate has an elastic layer. Clamping plates are provided on both sides of the upper end of the fixation base body. Each clamping plate is connected to a locking rod.

[0004] The above solution has solved the problem of head fixation in CT scans to some extent, but it still has many shortcomings, such as being relatively complex to operate and having poor adaptability to different groups of patients. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing an inflatable fixation device for head CT examination that is simple to operate and has good adaptability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an inflatable fixation device for head CT examination, including a fixed head frame, an inflatable restraint strap fixed to the inner side of the fixed head frame by Velcro, a manual air pump connected to the inflatable restraint strap through an air tube, and a manual air distribution component provided between the inflatable restraint strap and the air tube.

[0007] In the aforementioned inflatable fixation device for head CT examination, the inflatable restraint band includes an upper band, a middle band, and a lower band arranged adjacent to each other. The width of the upper band and the lower band is greater than the width of the middle band, and the internal cavities of the upper band, the middle band, and the lower band are relatively independent.

[0008] In the aforementioned inflatable fixation device for head CT examination, the manual air distribution assembly includes an air distribution valve, which is connected to the internal cavities of the upper, middle, and lower belts via independent air distribution pipes.

[0009] In the aforementioned inflatable fixation device for head CT examination, the gas distribution valve is cylindrical, and an upper air outlet, a middle air outlet, and a lower air outlet are arranged sequentially along the axial direction on the side of the gas distribution valve. The upper air outlet is connected to the upper belt body through a gas distribution pipe, the middle air outlet is connected to the middle belt body through a gas distribution pipe, and the lower air outlet is connected to the lower belt body through a gas distribution pipe. An air inlet connected to the inflation pipe is provided on the side of the gas distribution valve, and the air inlet and the middle air outlet are located in the same axial position relative to the gas distribution valve.

[0010] In the aforementioned inflatable fixation device for head CT examination, a columnar valve core is slidably installed inside the gas distribution valve. The valve core has a first gas distribution channel connecting the air inlet and the middle air outlet, a second gas distribution channel connecting the air inlet and the upper air outlet, and a third gas distribution channel connecting the air inlet and the lower air outlet. The air inlet slides axially with the valve core and is selectively connected to one of the upper air outlet, the middle air outlet, or the lower air outlet.

[0011] In the aforementioned inflatable fixation device for head CT examination, an elastic reset element is provided between the valve core and the air distribution valve. The valve core is in a central position when stationary and the air inlet is connected to the middle air outlet by the first air distribution channel.

[0012] In the aforementioned inflatable fixation device for head CT examination, a limiting groove and a limiting strip are provided between the valve core and the air distribution valve, which slide against each other and extend axially. The valve core has a pressing part that extends to the outside of the end of the air distribution valve.

[0013] In the aforementioned inflatable fixation device for head CT examination, the air distribution tube and the inflation tube are each equipped with an on / off valve.

[0014] In the aforementioned inflatable fixation device for head CT examination, the head frame includes a horizontally arranged mounting plate. The mounting plate is connected to a support plate via an inclined or vertically arranged adapter plate. The support plate has upwardly curved fixing parts on both sides. The inflatable restraint strap is fixed to the inside of the fixing parts and the upper surface of the support plate via Velcro.

[0015] In the aforementioned inflatable fixation device for head CT examination, the head frame is made of carbon fiber.

[0016] Compared with existing technologies, the advantages of this invention are as follows: the fixed head frame and the inflatable restraint strap work together, using a pneumatic method to provide clamping force, and the expansion amount can be flexibly adjusted through a manual air distribution component, making it suitable for different groups of people; the inflatable restraint strap inflates and expands, and its elasticity ensures safety during use; the fixed head frame can be detached from the inflatable restraint strap at will, facilitating cleaning, disinfection, and reuse; the structure is relatively simple and reliable, making it convenient for technicians to operate; the fixed head frame is made of carbon fiber, which will not produce artifacts during CT scans, ensuring imaging quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural cross-sectional view of the manual valve timing assembly of this utility model;

[0019] Figure 3 This is a structural schematic diagram of the fixed head frame of this utility model;

[0020] In the diagram, the components are: fixed head frame 1, mounting plate 11, adapter plate 12, support plate 13, fixing part 14, Velcro 2, inflatable restraint strap 3, upper strap body 31, middle strap body 32, lower strap body 33, inflation pipe 4, manual air pump 5, manual air distribution assembly 6, air distribution valve 61, air distribution pipe 62, upper air outlet 63, middle air outlet 64, lower air outlet 65, air inlet 66, valve core 7, first air distribution channel 71, second air distribution channel 72, third air distribution channel 73, elastic reset component 74, limiting groove 75, limiting strip 76, pressing part 77, and opening / closing valve 8. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1-3 As shown, an inflatable fixation device for head CT examination includes a fixed head frame 1 fixed to the CT examination table. An inflatable restraint strap 3 is fixed to the inside of the fixed head frame 1 via Velcro 2, and can be disassembled and separated as needed. The inflatable restraint strap 3 is connected to a manual air pump 5 via an air tube 4, and its expansion is controlled manually. A manual air distribution assembly 6 is provided between the inflatable restraint strap 3 and the air tube 4, allowing manual adjustment of the expansion of different parts of the inflatable restraint strap 3 to adjust the fit and clamping force between the inflatable restraint strap 3 and the patient's head. After adjusting to the appropriate expansion degree, the manual air pump 5 and the manual air distribution assembly 6 can be disassembled and separated. After use, all components are separated and disinfected for easy reuse.

[0023] Specifically, unlike existing single-body restraint structures, the inflatable restraint band 3 in this embodiment includes an upper band 31, a middle band 32, and a lower band 33 arranged adjacent to each other. The widths of the upper band 31 and the lower band 33 are greater than the width of the middle band 32, and the internal cavities of the upper band 31, the middle band 32, and the lower band 33 are relatively independent. This inflatable restraint band 3 can clamp and fix the patient's head in multiple directions, and due to its own expansion elasticity, it can effectively reduce the discomfort caused by restraint.

[0024] To further simplify operation, the manual air distribution assembly 6 includes an air distribution valve 61. This valve 61 connects to the internal cavities of the upper belt body 31, middle belt body 32, and lower belt body 33 via independent air distribution pipes 62. The valve 61 switches between internal channels, allowing the manual air pump 5 to selectively supply air to one of them. The manual air pump 5 employs a compression air supply structure and is equipped with a pressure gauge for real-time pressure monitoring. This manual air distribution assembly 6 has a relatively simple structure, allowing technicians to intuitively adjust the expansion of each component.

[0025] Furthermore, unlike conventional valve body structures, the air distribution valve 61 in this embodiment is cylindrical. Along its side, an upper air outlet 63, a middle air outlet 64, and a lower air outlet 65 are arranged sequentially. The upper air outlet 63 is connected to the upper belt body 31 via an air distribution pipe 62, the middle air outlet 64 is connected to the middle belt body 32 via the air distribution pipe 62, and the lower air outlet 65 is connected to the lower belt body 33 via the air distribution pipe 62. An air inlet 66 connected to the inflation pipe 4 is provided on the side of the air distribution valve 61. The air inlet 66 and the middle air outlet 64 are located on the same axial direction relative to the air distribution valve 61. Both ends of the air distribution valve 61 are screw-down for easy assembly of the internal valve core 7.

[0026] Furthermore, a columnar valve core 7 is slidably installed inside the air distribution valve 61. The valve core 7 has a first air distribution channel 71 connecting the air inlet 66 to the middle air outlet 64, a second air distribution channel 72 connecting the air inlet 66 to the upper air outlet 63, and a third air distribution channel 73 connecting the air inlet 66 to the lower air outlet 65. The air inlet 66 slides axially with the valve core 7 and connects to one of the upper air outlet 63, the middle air outlet 64, or the lower air outlet 65. The sliding direction of the valve core 7 is consistent with the connection state of its internal channels.

[0027] In addition, an elastic reset element 74 is provided between the valve core 7 and the air distribution valve 61. When the valve core 7 is stationary, it is in the central position and the air inlet 66 is connected to the middle air outlet 64 by the first air distribution channel 71. When the valve core 7 slides axially, the air inlet 66 is connected to the upper air outlet 63 through the second air distribution channel 72, or the air inlet 66 is connected to the lower air outlet 65 through the third air distribution channel 73. When switching channels, the other channels are closed by the air distribution valve 61.

[0028] Meanwhile, to avoid circumferential misalignment, a limiting groove 75 and a limiting strip 76 that slide against each other and extend axially are provided between the valve core 7 and the air distribution valve 61. The valve core 7 has a pressing part 77 that extends to the outside of the end of the air distribution valve 61. The internal channel of the air distribution valve 61 can be switched by manually pressing. Its structure is relatively simple and has a good service life.

[0029] As can be seen, the air distribution pipe 62 and the inflation pipe 4 are each equipped with an on / off valve 8. The on / off valve 8 connected to the air distribution pipe 62 is usually a one-way valve, which remains open only when connected to the air distribution valve 61, and is closed under normal conditions to maintain the sealing of the internal cavity of the inflatable restraint band 3. The on / off valve 8 connected to the inflation pipe 4 can be manually opened and closed to depressurize the inflatable restraint band 3.

[0030] Clearly, the head support 1 elevates the patient's head. Specifically, it includes a horizontally arranged mounting plate 11, which is connected to a support plate 13 via an inclined or vertically arranged adapter plate 12. The support plate 13 has upward-curving fixing parts 14 on both sides. An inflatable restraint strap 3 is fixed to the inside of the fixing parts 14 and the upper surface of the support plate 13 via Velcro 2. The curved fixing parts 14 conform to the curvature of the human head, providing good coverage and achieving uniform pressure fixation after being secured with the inflatable restraint strap 3.

[0031] Preferably, the fixed head frame 1 is made of carbon fiber, which has good structural strength. The joint between the support plate 13 and the fixing part 14 is usually chamfered to further improve the comfort of use.

[0032] In summary, the principle of this embodiment is as follows: an inflatable restraint strap 3 is attached to the fixed head frame 1, and is pressurized and expanded by a manual air pump 5 to fit and tighten the head. The manual air distribution component 6 adjusts the expansion amount of different parts of the inflatable restraint strap 3 to adapt to the head fixation needs of different people.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as fixed head frame 1, mounting plate 11, adapter plate 12, support plate 13, fixing part 14, Velcro 2, inflatable restraint strap 3, upper strap body 31, middle strap body 32, lower strap body 33, inflation pipe 4, manual air pump 5, manual air distribution assembly 6, air distribution valve 61, air distribution pipe 62, upper air outlet 63, middle air outlet 64, lower air outlet 65, air inlet 66, valve core 7, first air distribution channel 71, second air distribution channel 72, third air distribution channel 73, elastic reset element 74, limiting groove 75, limiting strip 76, pressing part 77, and opening / closing valve 8, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An inflatable fixation device for head CT examination, comprising a head frame (1), characterized in that, The inner side of the fixed head frame (1) is fixed with an inflatable restraint strap (3) by Velcro (2). The inflatable restraint strap (3) is connected to a manual air pump (5) through an air tube (4). A manual air distribution component (6) is provided between the inflatable restraint strap (3) and the air tube (4). The inflatable restraint strap (3) includes an upper strap (31), a middle strap (32) and a lower strap (33) arranged adjacent to each other. The width of the upper strap (31) and the lower strap (33) is greater than the width of the middle strap (32). The internal cavities of the upper strap (31), the middle strap (32) and the lower strap (33) are relatively independent.

2. The inflatable fixation device for head CT examination according to claim 1, characterized in that, The manual air distribution assembly (6) includes an air distribution valve (61), which is connected to the internal cavities of the upper belt body (31), the middle belt body (32) and the lower belt body (33) through an independent air distribution pipe (62).

3. The inflatable fixation device for head CT examination according to claim 2, characterized in that, The air distribution valve (61) is cylindrical. The air distribution valve (61) has an upper air outlet (63), a middle air outlet (64) and a lower air outlet (65) arranged sequentially along the axial direction on its side. The upper air outlet (63) is connected to the upper belt body (31) through the air distribution pipe (62). The middle air outlet (64) is connected to the middle belt body (32) through the air distribution pipe (62). The lower air outlet (65) is connected to the lower belt body (33) through the air distribution pipe (62). The air distribution valve (61) has an air inlet (66) connected to the air filling pipe (4) on its side. The air inlet (66) and the middle air outlet (64) are located in the same axial position relative to the air distribution valve (61).

4. The inflatable fixation device for head CT examination according to claim 3, characterized in that, The valve (61) has a columnar valve core (7) slidably installed inside. The valve core (7) has a first air distribution channel (71) that connects the air inlet (66) and the middle air outlet (64). The valve core (7) has a second air distribution channel (72) that connects the air inlet (66) and the upper air outlet (63). The valve core (7) has a third air distribution channel (73) that connects the air inlet (66) and the lower air outlet (65). The air inlet (66) slides axially with the valve core (7) and is selectively connected to one of the upper air outlet (63), the middle air outlet (64), and the lower air outlet (65).

5. The inflatable fixation device for head CT examination according to claim 4, characterized in that, An elastic reset member (74) is provided between the valve core (7) and the air distribution valve (61). The valve core (7) is in the center position when it is stationary and the air inlet (66) and the air outlet (64) are connected by the first air distribution channel (71).

6. The inflatable fixation device for head CT examination according to claim 4, characterized in that, The valve core (7) and the air distribution valve (61) are provided with a limiting groove (75) and a limiting strip (76) that slide against each other and extend along the axial direction. The valve core (7) has a pressing part (77) that extends to the outside of the end of the air distribution valve (61).

7. The inflatable fixation device for head CT examination according to claim 2, characterized in that, The gas distribution pipe (62) and the gas filling pipe (4) are respectively equipped with on / off valves (8).

8. The inflatable fixation device for head CT examination according to claim 1, characterized in that, The fixed head frame (1) includes a horizontally arranged mounting plate (11), which is connected to a support plate (13) via an inclined or vertically arranged adapter plate (12). The support plate (13) has a fixed part (14) with a curved upward direction on both sides. The inflatable restraint strap (3) is fixed to the inside of the fixed part (14) and the upper surface of the support plate (13) by Velcro (2).

9. The inflatable fixation device for head CT examination according to claim 1, characterized in that, The fixed head frame (1) is made of carbon fiber.

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