Brachial plexus MRI body position fixing device

Abstract

The invention discloses a brachial plexus MRI body position fixing device which comprises an installation mechanism, the installation mechanism comprises a fixing plate arranged on an MRI examining table, the bottom of the end of the fixing plate is fixedly connected with a fixing block, the inner wall of the fixing block is in threaded connection with a fixing screw, the end of the fixing screw tightly abuts against the end of the MRI examining table, and the fixing block is fixedly connected with the fixing screw. The invention belongs to the technical field of MRI (Magnetic Resonance Imaging) examination, and aims to solve the problems that the shoulder width, arm length and head circumference difference of different patients are difficult to adapt in the prior art; in order to solve the technical problems that a patient feels uncomfortable due to the fact that blood vessels are pressed due to too tight fixation in the prior art, the technical effects are achieved that a plurality of sliding adjusting structures achieve full-dimension flexible adaptation, a first sliding block slides along an arm fixing assembly adjusting sliding groove, and each mounting plate slides along a head, neck and shoulder fixing assembly sliding groove; the U-shaped fixing part is matched to move along the transverse adjusting sliding groove, and the shoulder width, the arm length and the head circumference difference of different patients can be accurately adapted.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of MRI examination, in particular to an MRI body position fixing device for brachial plexus. BACKGROUND

[0002] In the field of brachial plexus MRI examination in the hospital radiology department and orthopedics department, the body position fixing device is a core auxiliary equipment, mainly used for fixing the body position of the patient's shoulder, arm and head. Its core function is to avoid the body position deviation of the patient caused by muscle fatigue or unconscious movement during the examination, to prevent imaging blur, artifacts and other problems, to ensure that the MRI image can clearly present the morphology and lesion details of the brachial plexus, to provide reliable basis for clinical diagnosis, and to be widely used in various imaging examination scenes of brachial plexus diseases.

[0003] In the examination of patients with different body types and different brachial plexus lesion sites, the traditional device usually uses rigid supports or simple binding tapes for fixing, which has poor adjustment flexibility and is difficult to adapt to the differences in shoulder width, arm length and head circumference of different patients. Moreover, it lacks precise pressure control, which is easy to cause discomfort to the patient due to excessive compression of blood vessels, or to cause body position shaking due to excessive looseness, affecting the imaging quality, and is difficult to meet the clinical individualized and high-precision body position fixing requirements. SUMMARY

[0004] Therefore, the present application provides an MRI body position fixing device for brachial plexus to solve the above problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: According to the first aspect of the present application, an MRI body position fixing device for brachial plexus comprises: a mounting mechanism, the mounting mechanism comprises a fixed plate arranged on an MRI examination bed, a fixed block is fixedly connected to the bottom of the end of the fixed plate, a fixed screw is threadedly connected to the inner wall of the fixed block, and the end of the fixed screw abuts against the end of the MRI examination bed; a body position fixing mechanism, the body position fixing mechanism comprises an arm fixing assembly, a shoulder lifting assembly, a neck positioning assembly and a head fixing assembly, the arm fixing assembly is provided in multiple groups and divided into a large arm fixing assembly and a small arm fixing assembly; a control mechanism arranged outside the MRI imaging room, the control mechanism comprises a gas pump, a plurality of electromagnetic valves are communicated with the output end of the gas pump through a communication pipe, and a control panel is arranged on the surface of the gas pump.

[0006] Further, the mounting mechanism further comprises an arm fixing assembly adjusting sliding groove, the arm fixing assembly adjusting sliding groove is arranged on both sides of the top of the fixed plate, and a head-neck-shoulder fixing assembly sliding groove is arranged in the middle of the top of the fixed plate.

[0007] Further, the arm fixing assembly comprises a first sliding block, the top of the first sliding block is fixedly connected with a first mounting plate, the surface of the first mounting plate is provided with a transverse adjusting sliding groove, and the surface of the first sliding block is in sliding connection with the inner wall of the arm fixing assembly adjusting sliding groove.

[0008] Further, the inside of the transverse adjusting sliding groove is in sliding connection with a U-shaped fixing piece, the bottom of the inner cavity of the U-shaped fixing piece is fixedly connected with a silica gel arm pad, and the inner wall of the U-shaped fixing piece is fixedly connected with a first fixed air bag.

[0009] Further, the shoulder lifting assembly comprises a second mounting plate, the bottom of the second mounting plate is fixedly connected with a second sliding block, the surface of the second sliding block is in sliding connection with the inner wall of the head-neck-shoulder fixing assembly sliding groove, and one side of the second mounting plate is fixedly connected with a triangular transition soft pad.

[0010] Further, the top of the second mounting plate, away from the top of the end of the triangular transition soft pad, is fixedly connected with a supporting air bag, the top of the supporting air bag is fixedly connected with a lifting plate, and the end, away from the supporting air bag, of the lifting plate is in rotary connection with the top of the end of the second mounting plate.

[0011] Further, the neck positioning assembly comprises a third mounting plate, the bottom of the third mounting plate is fixedly connected with a third sliding block, the surface of the third sliding block is in sliding connection with the inner wall of the head-neck-shoulder fixing assembly sliding groove, the top of the third sliding block is fixedly connected with a first arc-shaped mounting plate, and the inner wall of the first arc-shaped mounting plate is fixedly connected with a second fixed air bag.

[0012] Further, the head fixing assembly comprises a fourth mounting plate, the bottom of the fourth mounting plate is fixedly connected with a fourth sliding block, the surface of the fourth sliding block is in sliding connection with the inner wall of the head-neck-shoulder fixing assembly sliding groove, the top of the fourth sliding block is fixedly connected with a second arc-shaped mounting plate, one side of the second arc-shaped mounting plate is fixedly connected with a third fixed air bag, and the middle of the top of the fourth mounting plate is fixedly connected with a silica gel head pad.

[0013] Further, the air inlets of the first fixed air bag, the supporting air bag, the second fixed air bag and the third fixed air bag are in communication with the output end of the electromagnetic valve through a pipeline, and the inner wall of the first fixed air bag, the supporting air bag, the second fixed air bag and the third fixed air bag is provided with a non-magnetic pressure sensor.

[0014] Further, the inside of the first mounting plate, the U-shaped fixing piece, the second mounting plate, the third mounting plate and the fourth mounting plate is in threaded connection with a locking screw, and the end of the locking screw is in abutment with the surface of the fixed plate and the first mounting plate.

[0015] This invention has the following advantages: It achieves flexible adaptation in all dimensions through multiple sets of sliding adjustment structures. The first sliding block slides along the adjustment groove of the arm fixation component, and each mounting plate slides along the groove of the head, neck, and shoulder fixation component. Combined with the movement of the U-shaped fixing piece along the lateral adjustment groove, it can precisely adapt to differences in shoulder width, arm length, and head circumference among different patients, meeting the personalized needs of patients of various sizes. With the synergistic effect of the airbag-type fixation structure and the non-magnetic pressure sensor, the first, second, and third fixing airbags and the supporting airbag can flexibly conform to the patient's body. The pressure sensor provides real-time pressure data feedback, and the inflation volume is controlled through the external control panel in conjunction with the solenoid valve and air pump, achieving precise pressure adjustment and avoiding excessive tightness or looseness. The locking screws of each component ensure stable positioning after adjustment. Combined with the non-magnetic material, it adapts to the MRI environment, ensuring image quality while improving patient comfort during examination, fully meeting the personalized and high-precision positioning needs of clinical practice. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of a brachial plexus MRI positioning fixation device provided by the present invention.

[0017] Figure 2 This is a side view of a brachial plexus MRI positioning fixation device provided by the present invention.

[0018] Figure 3 This is a schematic diagram of the installation structure of the brachial plexus MRI positioning fixation device provided by the present invention.

[0019] Figure 4 This is an exploded structural diagram of a brachial plexus MRI positioning fixation device provided by the present invention.

[0020] Figure 5 This is a schematic diagram of the installation state structure of the brachial plexus MRI positioning fixation device provided by the present invention.

[0021] Figure 6 This is a schematic diagram of the body positioning mechanism of a brachial plexus MRI positioning device provided by the present invention.

[0022] Figure 7 This is a bottom-view structural diagram of the body positioning fixation mechanism of a brachial plexus MRI body positioning fixation device provided by the present invention.

[0023] Figure 8 A schematic diagram of the arm fixation component of a brachial plexus MRI positioning fixation device provided by the present invention.

[0024] In the diagram: 11. Fixing plate; 12. Fixing block; 13. Fixing screw; 14. Arm fixing component adjustment slide; 15. Head, neck and shoulder fixing component slide; 21. First sliding block; 22. First mounting plate; 23. Lateral adjustment slide; 24. U-shaped fixing piece; 25. Silicone arm pad; 26. First fixing airbag; 31. Second mounting plate; 32. Second sliding block; 33. Triangular transition pad; 34. Support airbag; 35. Elevating plate; 41. Third mounting plate; 42. Third sliding block; 43. First arc-shaped mounting plate; 44. Second fixing airbag; 51. Fourth mounting plate; 52. Fourth sliding block; 53. Second arc-shaped mounting plate; 54. Silicone head pad; 55. Third fixing airbag; 61. Air pump; 63. Solenoid valve. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0026] like Figures 1 to 8 As shown, a brachial plexus MRI positioning fixation device according to a first aspect embodiment of the present invention includes: a mounting mechanism, which includes a fixing plate 11 disposed on an MRI examination table, a fixing block 12 fixedly connected to the bottom of the end of the fixing plate 11, a fixing screw 13 threadedly connected to the inner wall of the fixing block 12, and the end of the fixing screw 13 tightly abutting against the end of the MRI examination table; a positioning fixation mechanism, which includes an arm fixation component, a shoulder elevation component, a neck positioning component, and a head fixation component, wherein the arm fixation component is provided in multiple sets, divided into upper arm fixation component and forearm fixation component; and a control mechanism disposed outside the MRI imaging chamber, which includes an air pump 61, the output end of the air pump 61 being connected to multiple solenoid valves 63 through a connecting pipe, and a control panel being disposed on the surface of the air pump 61; In the above embodiments, it should be noted that the fixing plate 11 is made of carbon fiber non-magnetic material to avoid interfering with the MRI magnetic field, and its size is adapted to the specifications of conventional MRI examination tables; the fixing block 12 and the fixing screw 13 cooperate to form a detachable fixing structure, which facilitates the transfer and installation of the device between different examination tables; the control mechanism is set outside the MRI imaging room, and its core purpose is to avoid the influence of the magnetic field generated by electrical components such as the air pump 61 and the solenoid valve 63 on the imaging quality. The control panel integrates basic functions such as start / stop and air volume adjustment to realize remote control; The technical effects achieved by the above embodiments are as follows: a basic framework of "installation-fixation-control" is constructed, and the device is stably fitted to the examination bed through mechanical structure to avoid displacement of the device itself; the isolation design between the control mechanism and the imaging room ensures the compatibility of the MRI examination environment, and initially solves the problem of interference magnetic fields by electrical components of traditional fixation devices, laying the foundation for the subsequent assembly and functional realization of body positioning fixation components. Example

[0027] like Figures 1 to 8 As shown, a brachial plexus MRI positioning device includes all the contents of Embodiment 1. In addition, the mounting mechanism further includes an arm fixation component adjustment groove 14, which is formed on both sides of the top of the fixing plate 11. A head, neck, and shoulder fixation component groove 15 is provided in the middle of the top of the fixing plate 11. The arm fixation component includes a first sliding block 21, and a first mounting plate 22 is fixedly connected to the top of the first sliding block 21. A transverse adjustment groove 23 is formed on the surface of the first mounting plate 22. The surface of the first sliding block 21 is slidably connected to the inner wall of the arm fixation component adjustment groove 14. A U-shaped fixing member 24 is slidably connected inside the transverse adjustment groove 23. A silicone arm pad 25 is fixedly connected to the bottom of the inner cavity of the 24. A first fixing airbag 26 is fixedly connected to the inner wall of the U-shaped fixing member 24. The shoulder lifting component includes a second mounting plate 31. A second sliding block 32 is fixedly connected to the bottom of the second mounting plate 31. The surface of the second sliding block 32 is slidably connected to the inner wall of the head, neck and shoulder fixing component slide groove 15. A triangular transition soft pad 33 is fixedly connected to one side of the second mounting plate 31. A supporting airbag 34 is fixedly connected to the top of the second mounting plate 31 at the end away from the triangular transition soft pad 33. A lifting plate 35 is fixedly connected to the top of the supporting airbag 34. The end of the lifting plate 35 away from the supporting airbag 34 is rotatably connected to the top of one end of the second mounting plate 31. In the above embodiments, it should be noted that the arm fixation component adjustment groove 14 and the head, neck and shoulder fixation component groove 15 are opened along the length direction of the fixation plate 11, providing longitudinal adjustment stroke for each fixation component; the first sliding block 21 cooperates with the transverse adjustment groove 23 to realize the longitudinal and transverse bidirectional adjustment of the U-shaped fixation component 24, adapting to patients with different arm lengths; the silicone arm pad 25 is made of medical flexible silicone to reduce the discomfort of arm pressure; when the airbag 34 is inflated, it pushes the elevation plate 35 to rotate around the rotating end, realizing stepless adjustment of the shoulder elevation angle; the triangular transition soft pad 33 fills the gap between the elevation plate 35 and the patient's back, improving the fit; The technical effects achieved by the above embodiments are as follows: through multiple sets of sliding adjustment structures, the arm fixation component and the shoulder elevation component can be adapted to all dimensions, which can meet the needs of patients with different body types for arm length and shoulder width; the airbag-type elevation and fixation structure replaces the traditional rigid support to achieve flexible support, which avoids excessive pressure and can stably maintain the shoulder elevation position; the design of silicone pads and triangular transition soft pads improves the patient's examination comfort and solves the core problems of poor adjustment flexibility and insufficient adaptability of traditional devices. Example

[0028] like Figures 1 to 8 As shown, a brachial plexus MRI positioning device includes all the contents of Embodiment 2. Furthermore, the neck positioning component includes a third mounting plate 41, with a third sliding block 42 fixedly connected to the bottom of the third mounting plate 41. The surface of the third sliding block 42 is slidably connected to the inner wall of the head, neck, and shoulder fixation component groove 15. A first arc-shaped mounting plate 43 is fixedly connected to the top of the third sliding block 42, and a second fixation airbag 44 is fixedly connected to the inner wall of the first arc-shaped mounting plate 43. The head fixation component includes a fourth mounting plate 51, with a fourth sliding block 52 fixedly connected to the bottom of the fourth mounting plate 51. The surface of the fourth sliding block 52 is slidably connected to the inner wall of the head, neck, and shoulder fixation component groove 15, and a second arc-shaped mounting plate 43 is fixedly connected to the top of the fourth sliding block 52. The first mounting plate 53 has a U-shaped mounting plate 53. A third fixed airbag 55 is fixedly connected to one side of the second arc-shaped mounting plate 53. A silicone head pad 54 is fixedly connected to the middle of the top of the fourth mounting plate 51. The air inlets of the first fixed airbag 26, the supporting airbag 34, the second fixed airbag 44 and the third fixed airbag 55 are all connected to the output end of the solenoid valve 63 through a conduit. The inner walls of the first fixed airbag 26, the supporting airbag 34, the second fixed airbag 44 and the third fixed airbag 55 are all provided with non-magnetic pressure sensors. The interior of the first mounting plate 22, the U-shaped fastener 24, the second mounting plate 31, the third mounting plate 41 and the fourth mounting plate 51 are all threaded with locking screws. The ends of the locking screws are tightly abutted against the surfaces of the fixing plate 11 and the first mounting plate 22, respectively. In the above embodiments, it should be noted that both the first arc-shaped mounting plate 43 and the second arc-shaped mounting plate 53 are designed to conform to the physiological curves of the human neck and head; the non-magnetic pressure sensor collects the pressure data of the airbag in contact with the human body in real time, and transmits it to the control panel through wires to realize pressure visualization; the solenoid valve 63 corresponds to each airbag and can independently control the inflation and deflation of a single airbag; the locking screw is used for positioning after each sliding component is adjusted to the correct position to prevent component displacement during inspection; the silicone head pad 54 is filled with memory foam material to improve head support comfort.

[0029] The technical effects achieved by the above embodiments are as follows: the addition of neck and head fixation components realizes coordinated fixation of the entire head, neck, shoulders, and arms, further improving postural stability; the linkage between the non-magnetic pressure sensor, solenoid valve, and air pump enables precise control of airbag pressure, solving the problem of inaccurate pressure control in traditional devices and avoiding excessive tightness that compresses blood vessels or excessive looseness that causes swaying; the independent adjustment and locking positioning of each component enables personalized adaptation for patients of various sizes, and the all-non-magnetic material design ensures MRI imaging quality, fully meeting the clinical needs for personalized and high-precision postural fixation.

[0030] Working principle: First, after completing the installation and fixation of the device, place the fixing plate 11 stably on the MRI examination table, and rotate the fixing screw 13 inside the fixing block 12 to make the end of the screw tightly against the end of the examination table to achieve a stable assembly of the device; then, according to the body shape parameters of the patient to be examined, perform preliminary adjustment of each component, loosen the corresponding locking screws, push the first sliding block 21 to slide along the arm fixing component adjustment groove 14 and the U-shaped fixing piece 24 to slide along the transverse adjustment groove 23 to determine the position of the arm fixing component; push the second sliding block 32, the third sliding block 42, and the fourth sliding block 52 to slide along the head, neck, and shoulder fixing component groove 15 to adjust the distance between the shoulder, neck, and head components. After adjustment, tighten each locking screw for positioning. Next, guide the patient to lie on the device, so that the head is in contact with the silicone head pad 54, the neck is in contact with the inner side of the first arc-shaped mounting plate 43, and the arm is placed on the silicone arm pad 25 inside the U-shaped fixing piece 24; medical staff start the device through the control panel outside the MRI imaging room, according to The examination requires setting pressure thresholds for each airbag and controlling the air pump 61 to inflate the first fixed airbag 26, the expansion airbag 34, the second fixed airbag 44, and the third fixed airbag 55 via solenoid valves 63. During inflation, a non-magnetic pressure sensor provides real-time pressure data. When the pressure reaches the set threshold, the control panel automatically closes the corresponding solenoid valve 63, stopping inflation. After the expansion airbag 34 is inflated, it pushes the elevation plate 35 to flip, raising the patient's shoulders to a suitable angle to reduce cervical curvature. The triangular transition pad 33 ensures a comfortable fit to the back. After each fixed airbag is inflated, it flexibly wraps around the corresponding area to achieve stable positioning. Finally, the MRI examination is initiated. During the examination, the control panel monitors the pressure of each airbag in real time. If pressure fluctuations occur, it automatically initiates inflation or deflation adjustments. After the examination, the control panel controls the solenoid valves 63 to deflate the airbags, loosens the locking screws, and guides the patient to stand up, completing a single examination. The above adjustment and fixation process can be repeated for the next patient.

Claims

1. A brachial plexus MRI positioning device, characterized in that, include: The mounting mechanism includes a fixing plate (11) set on the MRI examination table. A fixing block (12) is fixedly connected to the bottom of the end of the fixing plate (11). A fixing screw (13) is threadedly connected to the inner wall of the fixing block (12). The end of the fixing screw (13) is tightly abutted against the end of the MRI examination table. A body positioning fixation mechanism, comprising an arm fixation component, a shoulder elevation component, a neck positioning component, and a head fixation component, wherein the arm fixation component is provided in multiple sets, including an upper arm fixation component and a forearm fixation component; A control mechanism located outside the MRI imaging room includes an air pump (61), the output end of which is connected to multiple solenoid valves (63) via a connecting pipe, and a control panel is provided on the surface of the air pump (61).

2. The brachial plexus MRI positioning device according to claim 1, characterized in that, The installation mechanism also includes an arm fixing component adjustment slide (14), which is opened on both sides of the top of the fixing plate (11), and a head, neck and shoulder fixing component slide (15) is provided in the middle of the top of the fixing plate (11).

3. The brachial plexus MRI positioning device according to claim 1, characterized in that, The arm fixing assembly includes a first sliding block (21), the top of which is fixedly connected to a first mounting plate (22). The surface of the first mounting plate (22) is provided with a transverse adjustment groove (23), and the surface of the first sliding block (21) is slidably connected to the inner wall of the adjustment groove (14) of the arm fixing assembly.

4. The brachial plexus MRI positioning device according to claim 3, characterized in that, The transverse adjustment groove (23) is slidably connected to a U-shaped fastener (24), and a silicone arm pad (25) is fixedly connected to the bottom of the inner cavity of the U-shaped fastener (24). The inner wall of the U-shaped fastener (24) is fixedly connected to a first fixed airbag (26).

5. The brachial plexus MRI positioning device according to claim 1, characterized in that, The shoulder lifting assembly includes a second mounting plate (31), a second sliding block (32) is fixedly connected to the bottom of the second mounting plate (31), the surface of the second sliding block (32) is slidably connected to the inner wall of the head, neck and shoulder fixing assembly groove (15), and a triangular transition pad (33) is fixedly connected to one side of the second mounting plate (31).

6. The brachial plexus MRI positioning device according to claim 5, characterized in that, The top of the second mounting plate (31) is fixedly connected to the end away from the triangular transition pad (33) with a support airbag (34), and the top of the support airbag (34) is fixedly connected to a lifting plate (35). The end of the lifting plate (35) away from the support airbag (34) is rotatably connected to the top of one end of the second mounting plate (31).

7. The brachial plexus MRI positioning device according to claim 1, characterized in that, The neck positioning component includes a third mounting plate (41), the bottom of which is fixedly connected to a third sliding block (42), the surface of which is slidably connected to the inner wall of the head, neck and shoulder fixing component groove (15), the top of which is fixedly connected to a first arc-shaped mounting plate (43), and the inner wall of which is fixedly connected to a second fixing airbag (44).

8. The brachial plexus MRI positioning device according to claim 1, characterized in that, The head fixation assembly includes a fourth mounting plate (51), a fourth sliding block (52) is fixedly connected to the bottom of the fourth mounting plate (51), the surface of the fourth sliding block (52) is slidably connected to the inner wall of the head, neck and shoulder fixation assembly groove (15), a second arc-shaped mounting plate (53) is fixedly connected to the top of the fourth sliding block (52), a third fixation airbag (55) is fixedly connected to one side of the second arc-shaped mounting plate (53), and a silicone head pad (54) is fixedly connected to the middle of the top of the fourth mounting plate (51).

9. The brachial plexus MRI positioning device according to claim 1, characterized in that, The air inlets of the first fixed airbag (26), the supporting airbag (34), the second fixed airbag (44), and the third fixed airbag (55) are all connected to the output end of the solenoid valve (63) through conduits. The inner walls of the first fixed airbag (26), the supporting airbag (34), the second fixed airbag (44), and the third fixed airbag (55) are all equipped with non-magnetic pressure sensors.

10. The brachial plexus MRI positioning device according to claim 1, characterized in that, The first mounting plate (22), the U-shaped fastener (24), the second mounting plate (31), the third mounting plate (41) and the fourth mounting plate (51) are all threaded with locking screws, and the ends of the locking screws are respectively in close contact with the surfaces of the fixing plate (11) and the first mounting plate (22).

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