Arm fixing device for radiotherapy positioning enhanced CT (Computed Tomography) scanning

Abstract

The invention belongs to the technical field of medical auxiliary instruments. In order to solve the problems that when an existing device is used, the comfort degree is poor, and discomfort caused by the fact that the upper limbs of a patient are kept still for a long time cannot be relieved, the arm fixing device for radiotherapy positioning enhanced CT scanning comprises a mounting frame, a large arm fixing mechanism, a small arm fixing mechanism and a relieving mechanism; wherein the big arm fixing mechanism is respectively connected with the mounting frame and the small arm fixing mechanism, and the relieving mechanism is arranged on the small arm fixing mechanism; the height of the big arm fixing mechanism and the forearm fixing mechanism can be adjusted so as to be suitable for patients with different figures, and the relieving mechanism can drive the fingers of the patients to slightly move so as to avoid discomfort caused by the fact that the upper limbs of the patients keep still for a long time.

Description

Technical Field

[0001] This invention belongs to the field of medical auxiliary device technology, specifically relating to an arm fixation device for radiotherapy positioning and enhanced CT scanning. Background Technology

[0002] Enhanced MRI and enhanced CT scans of the abdomen are common medical examination methods. Especially for lesions in the chest, abdomen, and pelvis, the procedure involves injecting a contrast agent intravenously using a high-pressure injector, followed by scanning within a specified time. The lesion is then diagnosed or differentiated based on its enhancement pattern.

[0003] When performing enhanced MRI and CT scans of the abdomen, the patient needs to keep both arms flexed behind the head to facilitate intravenous procedures by the nurse injecting contrast agent through the patient's antecubital vein. This also allows the nursing staff to observe the injection site, reduces artifacts caused by the arms being placed at the sides of the body, and avoids accidental injuries caused by movement of the examination table during the examination.

[0004] Patent CN211460263U discloses an arm fixation device for a CT bed, comprising two fixing blocks connected by two sliding rods. An arm support, an elbow rest, and an arm fixation support are slidably connected sequentially on the sliding rods. The arm support is located at one end of the headboard of the CT bed, and a pressure-reducing ball is connected to one side of the arm fixation support. In use, the arm support can slide back and forth on the sliding rods, making it suitable for patients of different body types. When the patient's arm needs to be raised towards the head, the arm can be placed on the arm support, then the arm support can be lifted upwards, and the support can be rotated. The end of the support can be engaged in the corresponding limiting groove to limit the arm support, thus reducing patient fatigue by eliminating the need for the patient to keep their arm raised and keeping the arm stationary, resulting in more accurate scan results.

[0005] However, when using the above-mentioned technical solution, the arm support and the CT bed surface are basically on the same plane. Since different patients have different body shapes, the height at which the arms remain still after raising both arms above the head varies from patient to patient. This makes it impossible for the arms of patients of different body shapes to be positioned within the grooves on the arm support, resulting in poor overall comfort of the device. Furthermore, since enhanced CT scans generally take a long time, about 30 minutes, patients may experience discomfort such as numbness, pain, etc., due to keeping their upper limbs still for a long time. The above-mentioned technical solution cannot alleviate this discomfort. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems of poor comfort during use of existing devices and the inability to alleviate discomfort caused by patients keeping their upper limbs still for extended periods.

[0007] To achieve the above objectives, the technical approach adopted by this invention is as follows: An arm fixation device for radiotherapy positioning and enhanced CT scanning is provided, comprising a mounting frame, an upper arm fixation mechanism, a forearm fixation mechanism, and a relaxation mechanism; wherein the upper arm fixation mechanism is connected to both the mounting frame and the forearm fixation mechanism, and the relaxation mechanism is disposed on the forearm fixation mechanism; this invention allows for height adjustment of the upper arm fixation mechanism and the forearm fixation mechanism to accommodate patients of different body shapes, and the relaxation mechanism can facilitate slight movement of the patient's fingers to alleviate discomfort caused by prolonged immobility of the upper limb.

[0008] Based on the above technical concept, the technical solution adopted by this invention is as follows: An arm fixation device for radiotherapy positioning in enhanced CT scans, comprising: The mounting bracket is placed at the corner of the CT examination table; The boom fixing mechanism is detachably connected to the mounting frame; The forearm fixing mechanism is connected to the upper arm fixing mechanism via a rotating connector; The relief mechanism, located on the forearm fixation mechanism, is used to facilitate the bending movement of the patient's fingers.

[0009] To provide support for the patient's upper arm and forearm while simultaneously immobilizing them to prevent upper limb movement, in the above-mentioned technical solution, preferably, the upper arm immobilization mechanism includes: First telescopic pole; The first connecting base is connected to the output end of the first telescopic rod, and the side of the first connecting base is slidably connected to the mounting bracket; The boom limiting plate is rotatably connected to the first connecting base; The boom fixing assembly is located on the bottom surface of the boom limiting plate.

[0010] To better suit patients with different needs, the above-mentioned technical solution is further defined, and the upper arm fixation component includes: The left clamping rod is located on the inner wall of the boom limiting plate; The right clamping rod is located on the inner wall of the boom limiting plate and is situated on the side opposite to the left clamping rod. The support block is set on the bottom surface of the boom limiting plate and is located between the left clamping rod and the right clamping rod.

[0011] To ensure that the boom limit plate does not wobble during use, the above technical solution is further refined by providing a buffer on the bottom surface of the boom limit plate to prevent it from rotating.

[0012] To further improve patient comfort, the above technical solution is further refined by installing pressure sensors on the left clamping rod, right clamping rod, and support block to detect the pressure applied to the patient's upper arm.

[0013] To further specify the above technical solution, the rotary connector includes: The first telescopic plate is connected at one end to the boom fixing mechanism; The second telescopic plate is rotatably connected to the first telescopic plate at one end via a locking device, and connected to the forearm fixing mechanism at the other end.

[0014] To address the discomfort caused by prolonged immobility of the upper limbs during CT scans, the aforementioned technical solutions have been further refined, and the relief mechanisms include: The first mounting box is located above the forearm fixing mechanism; The driver is located inside the first mounting box, and the output end of the driver is equipped with a variable diameter shaft; Five finger sleeves are located on the outside of the first mounting box; Five traction lines, one end of each traction line is connected to the corresponding position on the variable diameter shaft, and the other end passes through the first mounting box and is connected to the corresponding finger sleeve.

[0015] To enable timely adjustment of the contrast agent injection pressure based on blood pressure changes during a patient's CT examination, the above technical solution is further refined by including a pressure regulating module for adjusting the contrast agent injection pressure; the pressure regulating module includes: The second mounting box is connected to the side of the first connecting base; The contrast agent injection tube is connected to the second mounting box. The flow meter is located in the second mounting box and is connected to the contrast agent injection tube; The pressure controller is located in the second mounting box and is connected to the contrast agent injection tubing.

[0016] To further define the above technical solution, the mounting bracket has an L-shaped structure, and the side of the mounting bracket is provided with a groove for sliding connection with the boom fixing mechanism.

[0017] To further specify the above technical solution, the forearm fixing mechanism includes: The second connecting base has its bottom surface connected to the rotary connector. The forearm limiting plate is rotatably connected to the second connecting base; The forearm fixing component is located on the bottom surface of the forearm limiting plate. Beneficial effects

[0018] This invention, through the combined design of an upper arm fixation mechanism, a forearm fixation mechanism, and a relaxation mechanism, not only allows for adjustment of the angle and height between the upper arm fixation mechanism and the forearm fixation mechanism according to the patient's body shape, so that the patient's upper arm and forearm fit snugly against the upper arm fixation mechanism and the forearm fixation mechanism respectively, thereby improving the patient's comfort during use, but also allows the relaxation mechanism to assist the patient in slight finger flexion movements during enhanced CT examinations, so as to ensure the patient can undergo normal examinations while reducing the discomfort caused by the patient's upper limb remaining immobile for a long time.

[0019] This invention, through the combined design of the upper arm limiting plate and the upper arm fixing component, can be adjusted according to the thickness of the upper arm of different patients, thereby improving the comfort of patients of different body shapes. Furthermore, patients can rotate the upper arm so that their upper limb can be adjusted to a comfortable angle.

[0020] The left clamping rod, right clamping rod, and support block provided by this invention are all equipped with pressure sensors for detecting the pressure applied by the patient, so as to monitor the supporting pressure of the elastic soft pad on the upper arm in a timely manner. In actual use, the extension length of the left clamping rod and right clamping rod can be adjusted according to the data detected by the pressure sensors, thereby further improving the comfort of the patient during use. Since venipuncture sites are generally located in the patient's middle cubital vein, the bending motion of the forearm can directly compress the puncture point, which can easily cause vascular bulging, subcutaneous leakage of contrast agent, and other vascular injection accidents, making it difficult to perform positioning scans smoothly. The rotating connector provided by this invention can not only adjust the angle between the upper arm fixation mechanism and the forearm fixation mechanism to improve the patient's comfort, but also avoid the forearm compressing the puncture point, ensuring the smooth performance of enhanced CT positioning scans.

[0021] This invention, through the combined design of a contrast agent injection tube, a flow meter, and a pressure controller, can analyze and determine the patient's blood pressure and puncture site status by real-time monitoring of the contrast agent input flow rate during enhanced CT examinations. This allows for real-time adjustment of the contrast agent pressure to a range suitable for the patient's current condition before injection. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the installation of an arm fixation device for radiotherapy positioning and enhanced CT scanning, provided by an embodiment of the present invention; Figure 2 This is a schematic diagram of an arm fixation device for radiotherapy positioning and enhanced CT scanning provided in an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the device from another perspective; Figure 4 A schematic diagram showing the connection relationship between the mounting frame and the boom fixing mechanism; Figure 5 for Figure 4 A half-sectional view of the device shown; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the boom fixing mechanism; Figure 8 This is a schematic diagram of the rotating connector. Figure 9 A schematic diagram showing the connection relationship between the traction rope, finger sleeve, and variable diameter shaft; Figure 10 for Figure 2 A schematic diagram of the device from another perspective; Figure 11 A schematic diagram showing the connection relationship between the forearm fixation mechanism and the relaxation mechanism; Figure 12 for Figure 11 The device shown is a cross-section of the upper part of the first mounting box; Figure 13 for Figure 1 Top view of the device shown; Figure 14 for Figure 1 The diagram shows the usage status of the device. Figure 15 for Figure 14 Top view of the device shown.

[0024] Among them, 1. mounting bracket; 11. groove; 2. Boom fixing mechanism; 21. First telescopic rod; 22. First connecting base; 22a. Slider; 23. Boom limiting plate; 24. Boom fixing assembly; 24a. Left clamping rod; 24b. Right clamping rod; 24c. Support block; 25. Buffer; 26. Pressure sensor; 27. Elastic telescopic sleeve; 28. Elastic soft pad layer; 3. Forearm fixing mechanism; 31. Second connecting base; 32. Forearm limiting plate; 33. Forearm fixing assembly; 4. Relaxation mechanism; 41. First mounting box; 42. Driver; 42a. Variable diameter shaft; 43. Finger sleeve; 44. Traction line; 5. Rotary connector; 51. First telescopic piece; 51a. First housing; 51b. First sliding piece; 52. Second telescopic piece; 53. Locking device; 6. Voltage regulating module; 61. Second mounting box; 62. Contrast agent injection tube; 7. Mounting column; 8. CT examination bed. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] In the description of this invention, it should be understood that the terms "length direction," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, features limited to "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The inventors discovered that in current devices, the arm support and the CT bed surface are basically on the same plane. However, different patients have different body shapes, so the height at which their arms remain still after raising them overhead varies. This makes it impossible for the arms of patients of different body shapes to fit within the grooves on the arm support, resulting in poor overall comfort. Furthermore, since CT scans typically last for a long time, about 30 minutes, patients experience discomfort such as numbness and pain when their upper limbs remain still for an extended period. The aforementioned technical solutions cannot alleviate this discomfort.

[0029] Based on the above findings, this application provides an arm fixation device for radiotherapy-guided enhanced CT scanning. This arm fixation device includes a mounting frame 1, an upper arm fixation mechanism 2, a forearm fixation mechanism 3, a relief mechanism 4, a rotating connector 5, and a pressure regulating module 6. The application achieves greater patient comfort through the following design: 1. The upper arm fixation mechanism 2 and the forearm fixation mechanism 3 provide support and fixation for the patient's upper arm and forearm respectively, so as to enhance the normal conduct of CT localization examination; 2. The relaxation mechanism 4 can assist in guiding the patient's arm movements to relieve discomfort caused by the patient's upper limbs remaining still for a long time; 3. The rotating connector 5 can not only adjust the angle between the upper arm fixation mechanism 2 and the lower arm fixation mechanism 3 to improve the patient's comfort, but also prevent the patient's forearm from compressing the contrast agent puncture point, thus avoiding vascular bulging, subcutaneous leakage of contrast agent, and other situations. 4. The pressure regulating module 6 can detect the contrast agent flow rate, thereby timely judging the patient's blood pressure status and the status of the puncture site, and then adjusting the injection pressure of the contrast agent in real time so that the injection pressure range of the contrast agent is suitable for the patient's current status. Example

[0030] This invention provides an arm fixation device for radiotherapy positioning in enhanced CT scans, such as... Figures 1 to 15 As shown, it includes a mounting bracket 1, a boom fixing mechanism 2, a forearm fixing mechanism 3, a relief mechanism 4, a rotating connector 5, a pressure regulating module 6, and two mounting columns 7.

[0031] Two mounting posts 7 are symmetrically positioned at the head of the CT examination bed. Each mounting post 7 has two upward-opening mounting cylinders fixed to its side. These cylinders engage with the mounting frame 1, and each cylinder has a locking bolt on its side. During use, medical personnel insert the mounting blocks located on the side of the mounting frame 1 into the corresponding mounting cylinders, and then use the locking bolts to press the mounting frame 1 against the inner wall of the opening in the mounting cylinder, thus securing the mounting frame 1. This allows for the installation of one mounting frame 1 on each mounting post 7, enabling the patient to raise both arms overhead and remain stationary in a "double-arms-overhead" position.

[0032] Each mounting bracket 1 has an L-shaped structure. Specifically, one side of each mounting bracket 1 is fixed with a mounting block for engaging with the mounting cylinder of the mounting column 7, and the other side has a groove 11 for engaging with the upper arm fixing mechanism 2. In this way, mounting bracket 1 can be set on each mounting column 7 so that the patient's arms can be raised above the head and fixed, so that the patient's arms are in the "arms raised position".

[0033] The embodiments of the present invention are illustrated using two mounting posts 7 and one mounting bracket 1 as an example.

[0034] Each boom fixing mechanism 2 includes a first telescopic rod 21, a first connecting base 22, a boom limiting plate 23, a boom fixing assembly 24, a buffer 25, a pressure sensor 26, an elastic telescopic sleeve 27, and a pressure sensor 28. Specifically, the first telescopic rod 21 is fixedly mounted on the corresponding mounting bracket 1, and the output end of the first telescopic rod 21 is fixedly connected to the bottom surface of the first connecting base 22; it should be noted that the first telescopic rod 21 provided in this embodiment of the invention is prior art, and this embodiment of the invention does not improve it. Preferably, the first telescopic rod 21 is an electric push rod. The first connecting base 22 is a C-shaped structure with an upward opening; specifically, the side of the first connecting base 22 near the mounting bracket 1 is also provided with a slider 22a that is slidably connected to the groove 11. The upper arm limiting plate 23 is similar to the first connecting base 22, and has a C-shaped structure with an upward opening. Specifically, the bottom surface of the upper arm limiting plate 23 is rotatably connected to the first connecting base 22 through a ball joint. In this way, when the patient places his upper limb into the opening of the upper arm limiting plate 23, the upper arm limiting plate 23 can rotate with the patient's upper arm, so that the patient's upper arm is always located on the upper arm limiting plate 23. In practical applications, in order to improve the stability of the boom limiting plate 23, a plurality of buffer members 25 are provided between the boom limiting plate 23 and the first connecting base 22. One end of each buffer member 25 is fixedly connected to the boom limiting plate 23, and the other end is fixedly connected to the first connecting base 22. Specifically, the embodiment of the present invention does not limit the specific structure of the buffer member 25. Preferably, the buffer member 25 is a spring. In practical applications, for the safety of the overall device, an elastic telescopic sleeve 27 is provided between the upper arm limiting plate 23 and the first connecting base 22. The upper end of the elastic telescopic sleeve 27 is fixedly connected to the bottom surface of the upper arm limiting plate 23, and the lower end is fixedly connected to the first connecting base 22. The buffer 25 is located inside the elastic telescopic sleeve 27. In this way, when the patient places the upper arm in the opening of the upper arm limiting plate 23 and rotates the upper arm, the upper arm limiting plate 23 rotates synchronously with the patient's upper arm. The upper arm fixation assembly 24 is fixedly installed in the opening of the upper arm limiting plate 23 to fix the patient's upper arm; the upper arm fixation assembly 24 includes a left clamping rod 24a, a right clamping rod 24b and a support block 24c; Specifically, the left clamping rod 24a and the right clamping rod 24b are symmetrically arranged, and the left clamping rod 24a and the right clamping rod 24b have the same structure, both including a telescopic rod and a side pressure block fixedly disposed on the movable end of the telescopic rod; wherein, the side of the side pressure block is concave, so that it can better fit the surface of the patient's upper arm; it should be noted that the telescopic rod provided in the embodiment of the present invention is the prior art, and for example, the telescopic rod is an electric push rod; The support block 24c is a block structure with a concave top surface. Specifically, the support block 24c is fixedly set on the surface of the upper arm limiting plate 23 and is located between the left clamping rod 24a and the right clamping rod 24b in order to provide support for the patient's upper arm. In practical applications, elastic padding layers 28 are fixedly provided on the surfaces of the left clamping rod 24a, right clamping rod 24b, and support block 24c that contact the patient, in order to further improve the patient's comfort during use. Furthermore, one or more pressure sensors 26 are provided on each elastic padding layer 28 to detect the pressure force on the patient's upper arm. The pressure sensor 26 on the left clamping rod 24a feeds back the monitored pressure data to the control unit of the telescopic rod in the left clamping rod 24a. The control unit adjusts the extension length of the telescopic rod in the left clamping rod 24a in real time based on the feedback pressure data. This embodiment of the invention is illustrated by using two pressure sensors 26 fixedly provided on each elastic padding layer 28 as an example. Similarly, the pressure sensor 26 located on the right clamping rod 24b feeds back the monitored pressure data to the control unit of the telescopic rod in the right clamping rod 24b. The control unit adjusts the extension length of the telescopic rod in the right clamping rod 24b in real time according to the feedback pressure data. The pressure sensor 26 located on the support block 24c feeds back the monitored pressure data to the control unit of the first telescopic rod 21. The control unit adjusts the extension length of the telescopic rod in the first telescopic rod 21 in real time according to the feedback pressure data. In this way, each control unit adjusts the extension length of the corresponding telescopic rod in real time based on the feedback pressure data, so that the support force of the left clamping rod 24a, the right clamping rod 24b and the first telescopic rod 21 on each position of the upper arm is always kept within a benign value, thereby maximizing the patient's comfort. In addition, it can ensure that the pressure at each position of the patient's upper arm support is balanced and not too high, reducing the risk of vascular injection accidents such as bulging of blood vessels, subcutaneous leakage of contrast agent, and needle dislodgement caused by excessive support pressure.

[0035] It should be noted that the pressure sensor 26, the telescopic rods and control units in each clamping rod, the connection method between the pressure sensor 26 and the corresponding control unit, and the control method by which the control unit controls the extension or retraction of the telescopic rod based on the pressure value fed back by the pressure sensor 26 are all existing technologies, and the present invention does not improve upon them.

[0036] The structure of the forearm fixing mechanism 3 is the same as that of the upper arm fixing mechanism 2, including a second connecting base 31, a forearm limiting plate 32, and a forearm fixing assembly 33; the forearm fixing assembly 33 includes a left clamping rod, a right clamping rod, and a support block. Specifically, the second connecting base 31 has the same structure as the first connecting base 22, the forearm limiting plate 32 has the same structure as the upper arm limiting plate 23, the forearm fixing component 33 has the same structure as the upper arm fixing component 34, and the connection relationship between the second connecting base 31, the forearm limiting plate 32 and the forearm fixing component 33 is the same as the connection relationship between the second connecting base 31, the upper arm limiting plate 23 and the upper arm fixing component 34 in the upper arm fixing mechanism 2, which will not be described again here.

[0037] In practical use, similar to the upper arm fixing assembly 24, the left clamping rod, right clamping rod, and support block in the forearm fixing assembly 33 are all provided with elastic soft pads, and each elastic soft pad is provided with a pressure sensor to adjust the extension length of the left or right clamping rod. The pressure sensor on the support block in the forearm fixing assembly 33 is electrically connected to the first telescopic rod 21. In this way, by combining the pressure sensors on the support block 24 and the support block in the forearm fixing assembly 33, the extension length of the movable end of the first telescopic rod 21 can be adjusted. The working principle of the forearm fixing assembly 33 and the upper arm fixing assembly 24 is the same, and will not be described in detail here.

[0038] In actual use, the forearm fixing mechanism 3 is connected to the upper arm fixing mechanism 2 via the rotating connector 5; the rotating connector 5 includes a first telescopic piece 51, a second telescopic piece 52 and a locking device 53.

[0039] Specifically, the first telescopic piece 51 includes a first box body 51a and a first sliding piece 51b; wherein, the first box body 51a is a square structure with a groove on the side, the first sliding piece 51b is located in the opening of the first box body 51a and is slidably connected to the first box body 51a; a first connecting piece is fixedly provided at the end of the first box body 51a away from the first sliding piece 51b; in use, the end of the first sliding piece 51b away from the first box body 51a is fixedly connected to the bottom surface of the first connecting base 22; The second telescopic piece 52 is similar to the first telescopic piece 51. The second telescopic piece 52 includes a second box and a second sliding piece. The second box is a square structure with a groove on its side. The second sliding piece is located inside the opening of the second box and is slidably connected to the second box. A second connecting piece is fixedly provided at the end of the second box away from the second sliding piece. The side of the second connecting piece has a groove for insertion with the first connecting piece. The end of the second sliding piece away from the second box is fixedly connected to the bottom surface of the second connecting base 31. The locking device 53 includes a bolt and a nut that mates with the bolt. In actual use, the bolt passes through the second connecting piece and the first connecting piece in sequence and is threadedly connected to the nut. In this way, before fixing the patient's upper arm, the bolt can be loosened first, and then the included angle between the first telescopic piece 51 and the second telescopic piece 52 can be adjusted. After the adjustment is completed, the bolt is tightened, thereby realizing the adjustment of the included angle between the first telescopic piece 51 and the second telescopic piece 52.

[0040] In actual use, locking bolts are provided on the sides of the first box 51a and the second box, and the movable end of each locking bolt is located inside the corresponding box and abuts against the side of the corresponding sliding piece. In actual use, the extension length of the first sliding piece 51b and the second sliding piece can be further adjusted according to the length of the patient's arm, and then the corresponding locking bolts are tightened to press and fix the first sliding piece 51b or the second sliding piece onto the inner wall of the opening of the corresponding box, thereby fixing the first sliding piece 51b or the second sliding piece.

[0041] The relief mechanism 4 includes a first mounting box 41, a driver 42, multiple finger sleeves 43, and multiple traction lines 44.

[0042] The first mounting box 41 is fixedly mounted on the upper end of the forearm limiting plate 32; specifically, the bottom surface of the first mounting box 41 is a concave square box. The driver 42 is fixedly installed inside the first mounting box 41, and a variable diameter shaft 42a is fixedly provided on the output end of the driver 42. Specifically, the side of the variable diameter shaft 42a is fixedly connected to one end of each traction line 44, and each traction line 44 is fixedly connected to a different diameter position of the variable diameter shaft 42a. The end of each traction line 44 away from the variable diameter shaft 42a is fixedly connected to the corresponding finger sleeve 43.

[0043] In actual use, the driver 42 can be started, which drives the variable diameter shaft 42a to rotate, so that each traction wire 44 is wrapped around the side of the variable diameter shaft 42a. At this time, each finger sleeve 43 rotates towards the side closer to the first mounting box 41 under the drive of the traction wire 44, thereby driving the patient's finger movement and relieving the patient's discomfort.

[0044] It should be noted that the driver 42 provided in this embodiment of the invention is prior art, and this embodiment of the invention does not make any improvements to it. For example, the driver 42 is a rotary motor.

[0045] The pressure regulating module 6 includes a second mounting box 61, a contrast agent injection tube 62, a flow meter, and a pressure sensor; wherein, the flow meter and the pressure sensor are existing technologies, and the present invention does not improve them.

[0046] Specifically, the second mounting box 61 is a square box-shaped structure and is fixedly mounted on the side of the second connecting base 31; the contrast agent injection tube 62 is sleeved with the second mounting box 61; the flow meter and pressure sensor are both located inside the second mounting box 61 and connected to the contrast agent injection tube 62 to detect the flow rate of the contrast agent passing through the contrast agent injection tube 62 and to adjust the contrast agent injection pressure; in actual use, one end of the contrast agent injection tube 62 is connected to a high-pressure injector, and the other end is connected to the patient's puncture needle or indwelling needle for injection of contrast agent.

[0047] It should be noted that the flow meter, pressure sensor and high-pressure injector provided in the embodiments of the present invention are all prior art, and the embodiments of the present invention do not make any improvements thereto.

[0048] Application Cases Mr. Liu, 45 years old, previously healthy, underwent an abdominal CT scan which revealed: 1. decreased liver parenchymal density; 2. liver cysts; 3. ascites. One week later, he underwent an abdominal CT scan with contrast. The abdominal CT scan with contrast included the following steps: S1: Inject iodine-containing contrast agent via an intravenous line in the arm; specifically, connect one end of the contrast agent injection tube 62 to the puncture needle and the other end to a high-pressure injector so that the high-pressure injector can inject the contrast agent into the patient's body. S2: The patient lies flat on the CT examination table with both arms raised and remains still; specifically, this step includes the following steps: S201: The patient places his upper arm inside the opening of the upper arm limiting plate 23; S202: Adjust the extension length of the first telescopic plate 51 and the second telescopic plate 52 so that the patient's upper arm is located inside the upper arm limiting plate 23 and the patient's forearm is located in the forearm limiting plate 32, and then tighten the locking bolt. S203: Loosen the locking device 53, then adjust the included angle between the first telescopic piece 51 and the second telescopic piece 52, and then tighten the locking device 53 to fix it. S204: Pressure sensor 26 detects the pressure force on the patient's upper limb, and then pressure sensor 26 sends the detected information to the control unit of the corresponding telescopic rod, and then the control unit controls the telescopic rod to extend or retract, so that the first telescopic rod 21, the left clamping rod 24a, the right clamping rod 24b, and the left clamping rod and the right clamping rod in the forearm fixation assembly 33 extend or retract, so that the patient's upper arm and forearm are in a comfortable state; S205: Place the patient's five fingers into the corresponding finger sleeves 43 to assist in finger movement and relieve patient discomfort during enhanced CT examination; S3: Connect one end of the contrast agent injection tube 62 to the puncture needle and the other end to the high-pressure injector so that the high-pressure injector can inject the contrast agent into the patient's body. S4: The CT scanner will perform multi-phase scans around the abdomen (such as arterial and venous phases). You need to hold your breath for about 10 to 20 seconds as instructed to ensure clear images.

[0049] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. An arm fixation device for radiotherapy positioning enhanced CT scanning, characterized in that, include: Mounting bracket (1) is placed at the corner of the CT examination table (7); The boom fixing mechanism (2) is detachably connected to the mounting frame (1); The forearm fixing mechanism (3) is connected to the upper arm fixing mechanism (2) via a rotating connector (5); The soothing mechanism (4) is set on the forearm fixation mechanism (3) and is used to drive the patient's finger bending movement.

2. An arm fixation device for radiotherapy positioning enhanced CT scanning according to claim 1, wherein, The boom fixing mechanism (2) includes: First telescopic pole (21); The first connecting base (22) is connected to the output end of the first telescopic rod (21), and the side of the first connecting base (22) is slidably connected to the mounting bracket (1); The boom limiting plate (23) is rotatably connected to the first connecting base (22); The boom fixing component (24) is located on the bottom surface of the boom limiting plate (23).

3. An arm fixation device for radiotherapy positioning enhanced CT scanning according to claim 2, wherein, The boom fixation assembly (24) includes: The left clamping rod (24a) is located on the inner wall of the boom limiting plate (23); The right clamping rod (24b) is located on the inner wall of the boom limiting plate (23) and is located on the side opposite to the left clamping rod (24a); The support block (24c) is located on the bottom surface of the boom limiting plate (23) and between the left clamping rod (24a) and the right clamping rod (24b).

4. The arm fixation device for radiotherapy positioning in enhanced CT scanning according to claim 2, characterized in that, The bottom surface of the boom limit plate (23) is also provided with a buffer (25) to prevent the boom limit plate (23) from rotating.

5. The arm fixation device for radiotherapy positioning in enhanced CT scanning according to claim 3, characterized in that, Pressure sensors (26) for detecting the pressure applied to the patient's upper arm are provided on the left clamping rod (24a), the right clamping rod (24b), and the support block (24c).

6. The arm fixation device for radiotherapy positioning in enhanced CT scanning according to claim 1, characterized in that, The rotating connector (5) includes: The first telescopic plate (51) is connected at one end to the boom fixing mechanism (2); The second telescopic plate (52) is rotatably connected to the first telescopic plate (51) at one end via a locking device (53), and connected to the forearm fixing mechanism (3) at the other end.

7. The arm fixation device for radiotherapy positioning in enhanced CT scanning according to claim 1, characterized in that, The palliative care facility (4) includes: The first mounting box (41) is located above the forearm fixing mechanism (3); The driver (42) is located inside the first mounting box (41), and the output end of the driver (41) is provided with a variable diameter shaft (41a). Five finger sleeves (43) are located on the outside of the first mounting box (41); Five traction lines (44) are connected at one end to the corresponding position on the variable diameter shaft (41a), and at the other end they pass through the first mounting box (41) and are connected to the corresponding finger sleeve (43).

8. The arm fixation device for radiotherapy positioning in enhanced CT scanning according to claim 2, characterized in that, It also includes a pressure regulating module (6) for adjusting the contrast agent injection pressure; the pressure regulating module (6) includes: The second mounting box (61) is connected to the side of the first connecting base (22); The contrast agent injection tube (62) is fitted into the second mounting box (61); The flow meter is located in the second mounting box (61) and connected to the contrast agent injection tube (62); The pressure controller is located in the second mounting box (61) and connected to the contrast agent injection tube (62).

9. The arm fixation device for radiotherapy positioning in enhanced CT scanning according to claim 1, characterized in that, The mounting bracket (1) has an L-shaped structure, and the side of the mounting bracket (1) is provided with a groove for sliding connection with the boom fixing mechanism (2).

10. The arm fixation device for radiotherapy positioning in enhanced CT scanning according to claim 1, characterized in that, The forearm fixing mechanism (3) includes: The second connecting base (31) has its bottom surface connected to the rotating connector (5); The forearm limiting plate (32) is rotatably connected to the second connecting base (31); The forearm fixing component (33) is disposed on the bottom surface of the forearm limiting plate (32).

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