Head positioning device based on infant brachial plexus magnetic resonance examination

Abstract

The invention relates to the technical field of medical examination aids, and discloses a head positioning device for infant brachial plexus magnetic resonance examination, which comprises a base and a protective seat, and a U-shaped accommodating cavity for accommodating the head is formed in the protective seat; a plurality of first supporting protruding blocks are arranged on the arc-shaped inner wall of the containing cavity, and the first supporting protruding blocks and the protection base are connected into a whole. The protection seat and the first supporting protruding block are both made of rubber materials, a main medium cavity is formed in the protection seat, a first medium cavity is formed in the first supporting protruding block, a first flow guide hole used for being communicated with the main medium cavity and the first medium cavity is formed in the inner wall of the protection seat, and a valve set used for adjusting medium pressure in the main medium cavity is arranged on the protection seat. The head of a child can be actively adjusted, supported and positioned, the child can more easily, naturally and comfortably keep a good examination posture in the magnetic resonance examination process, and then the imaging quality and the examination accuracy are improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical examination auxiliary instruments, and in particular to a head positioning device for magnetic resonance examination of brachial plexus nerves of infants and young children. Background Art

[0002] Brachial plexus examination in infants and young children is an important examination in medical examinations. By studying the early manifestations and types of adverse symptoms after brachial plexus injury in infants and young children, early screening and surgical intervention can be carried out. It is of great value for early diagnosis and treatment of brachial plexus injury in infants and young children, reducing the disability rate of children, and alleviating the economic burden on families and society.

[0003] In order to more accurately reflect the examination results, MRI (magnetic resonance imaging) is currently used to examine the brachial plexus of infants and young children. During the examination, there are strict requirements on the head position of the child. The head is required to be centered and not rotated, and the lower jaw is tightened. During the examination, the child lies flat on the examination platform, and the child's head is supported by the head support frame 2 (such as the head support frame 2) in the magnetic resonance equipment. Fig.10 However, the head support frames in existing magnetic resonance imaging devices are designed based on the standard of adult heads, that is, they are universal for all people. Since the volume of a child's head is smaller than that of an adult, there is a large gap between the periphery of the child's head and the inner wall of the head support frame, making it difficult for the child's head to be stably positioned. In addition, the MRI examination time is usually 15-20 minutes, and the examination time is long. During the examination, it is difficult for the child's head to maintain a centered posture. The head will twist during the examination, resulting in a failure to center the head, which ultimately affects the imaging quality. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a head positioning device for magnetic resonance imaging of the brachial plexus nerve of infants and young children. The positioning device is installed in a head support frame in the magnetic resonance equipment and can be used for auxiliary positioning of the heads of different children. It has strong versatility and allows the child's head to maintain a comfortable and good posture during the examination, thereby effectively improving the imaging quality.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A head positioning device for magnetic resonance examination of brachial plexus nerves of infants and young children comprises a base and a protective seat arranged on the edge of the top surface of the base, wherein the protective seat is in a U-shaped structure, and a U-shaped accommodating cavity for accommodating the head is formed in the protective seat; a plurality of first supporting protrusions for supporting the side periphery of the head are arranged at the arc-shaped inner wall of the accommodating cavity, and the first supporting protrusions are connected to the protective seat as a whole; the protective seat and the first supporting protrusions are both made of rubber-like materials, a main medium cavity is arranged in the protective seat, a first medium cavity is arranged in the first supporting protrusion, a first guide hole for connecting the main medium cavity and the first medium cavity is arranged on the inner wall of the protective seat, and a valve group for adjusting the medium pressure in the main medium cavity is arranged on the protective seat.

[0007] By adopting the above technical solution: when a child needs to undergo a brachial plexus examination, the head positioning device is placed in the head support frame of the magnetic resonance equipment, and when the child lies down, the head is placed in the accommodating cavity, and liquid or gas medium is filled into the main medium cavity and the first medium cavity through the valve group, so that the protective seat and the first supporting protrusion expand, and then the space of the accommodating cavity is adjusted to adapt to the head positioning needs of different children, so that the child's head can maintain a suitable posture for a long time during the examination, thereby improving the examination accuracy and imaging quality.

[0008] Preferably, the first support protrusion has a surface facing the center of the accommodating cavity configured as an arc surface, a gap is provided between the lower end of the first support protrusion and the base, and adjacent first support protrusions do not contact each other. The arc surface is more comfortable when in contact with the head, and the gap at the bottom of the first support protrusion can maintain stable contraction under pressure.

[0009] Preferably, second supporting protrusions for supporting the mandible are provided on the two side walls opposite to the opening end of the accommodating cavity, the side surface of the second supporting protrusion is connected to the protective seat as a whole, a gap is provided between the lower end of the second supporting protrusion and the base, the outer surface of the second supporting protrusion is configured as an arc surface, and the length of the second supporting protrusion is greater than the first supporting protrusion; a second medium cavity is provided in the second supporting protrusion, and a second flow guide hole for connecting the main medium cavity and the second medium cavity is provided on the inner wall of the protective seat. When examining the brachial plexus, the mandible is required to be retracted so that the physiological curvature of the cervical spine becomes relatively straight, which is conducive to the straightening of the sternocleidomastoid muscle to drive the straightening of the brachial plexus to obtain a better curved reconstruction image, and can also avoid artifacts caused by the unnatural position of the head and neck, thereby improving the accuracy of diagnosis; in this structure, the mandible is supported by the second supporting protrusion, and when the mandible is retracted, it rests on the second supporting protrusion, reducing the fatigue of maintaining the posture when the mandible is retracted.

[0010] Preferably, a support pad for supporting the back of the head is provided at the top surface of the base corresponding to the center of the accommodating cavity, and an independent third medium cavity is provided in the support pad; the third medium cavity is connected to the valve group through a guide tube, and the internal medium pressure is independently adjusted by the valve group. When the brachial plexus nerve is examined, the mandible is required to be retracted, and the support of the back of the head is raised by the support pad so that the mandible can be retracted more naturally; the medium pressure in the second medium cavity can be adjusted by the valve group and the guide tube, and the height of the support pad can be adjusted according to actual needs to meet the needs of different children's back of the head support.

[0011] Preferably, the third medium cavity is a columnar structure, and a plurality of annularly distributed diaphragms are provided in the third medium cavity, the diaphragms divide the third medium cavity into a plurality of annular support cavities, and the diaphragms are provided with third flow guide holes for connecting adjacent annular support cavities. The diaphragms enable the entire third medium cavity to expand more stably, and the annular support cavities have better support effects and are more comfortable.

[0012] Preferably, the medium in the main medium cavity, the first medium cavity, and the second medium cavity is the same and is configured as any one of water or air; the medium in the third medium cavity is configured as any one of water or air. Water or air is used as a medium because it is pollution-free, readily available, low-cost, and has little interference with magnetic resonance examination.

[0013] Preferably, the valve group includes a valve seat, two air inlet channels arranged in the valve seat, one of which is connected to the main medium cavity, and the other is connected to the guide pipe, and each air inlet channel is provided with an air inlet check valve; the valve seat is also provided with an exhaust mechanism. A fixed amount of medium can be separately injected into the main medium cavity and the third medium cavity through the air inlet check valve; and the medium in the main medium cavity and the third medium cavity can also be discharged through the exhaust mechanism.

[0014] Preferably, the exhaust mechanism includes an exhaust channel and an exhaust port, the two ends of the exhaust channel are respectively connected to the inner end side walls of the two intake channels, the middle part of the exhaust channel is connected to the exhaust port, and the valve seat is provided with a knob switch for controlling the on-off of the exhaust channel at the corresponding positions of the two ends of the exhaust channel. When the medium needs to be discharged, the rotary switch is turned on, and the medium is discharged through the exhaust channel and the exhaust port.

[0015] Preferably, the outer side of the protection seat is covered with a protection sleeve that matches its contour, and the protection sleeve is provided with avoidance holes corresponding to the outer ends of each first support protrusion and each second support protrusion; when the medium of preset pressure is rushed into the first medium cavity and the second medium cavity, the outer ends of the first support protrusion and the second support protrusion expand from the avoidance holes into the accommodating cavity. The protection sleeve plays a protective role on the one hand, and limits the expansion direction of the protection seat, the first support protrusion and the second support protrusion on the other hand, so that the first support protrusion and the second support protrusion expand into the accommodating cavity.

[0016] Preferably, a connecting sleeve is provided at the bottom of the base, a plurality of first Velcro strips are provided on the side wall of the protective sleeve, a connecting belt for bonding with the first Velcro strips is provided on the connecting sleeve, and a second Velcro strip is provided on the top surface of the protective sleeve. The connecting sleeve and the protective sleeve are bonded together by the first Velcro strips, so that they are easy to disassemble; the second Velcro strips can be used to stick disposable non-woven fabrics, and the disposable non-woven fabrics are replaced after each inspection, so that the inspection process is more hygienic.

[0017] Therefore, the present invention has the following beneficial effects: (1) it effectively fills the gap between the child's head and the head support frame, assists in positioning the child's head, helps the head maintain a stable posture during the examination, and improves the imaging quality of the magnetic resonance examination; (2) it can actively adjust the size of the accommodating cavity to adapt to the use of different children, and has strong versatility; (3) by adjusting the medium pressure in the third medium cavity, the support height for the back of the child's head can be changed, so that the mandible can be more naturally retracted and rest against the second supporting protrusion, so that the head can more comfortably maintain the natural retraction state of the mandible during the examination, effectively improving the imaging accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 Front view of .

[0020] Figure 3 for Figure 1 Top view of the .

[0021] Figure 4 for Figure 2 Sectional view at AA.

[0022] Figure 5 for Figure 2 Cross-sectional view at BB in the middle.

[0023] Figure 6 It is a structural diagram of the valve group.

[0024] Figure 7 A cross-sectional view of the valve block.

[0025] Figure 8 It is a connection diagram of the protective seat, protective sleeve and connecting sleeve.

[0026] Fig. 9 for Figure 8 Exploded diagram.

[0027] Fig.10 It is a schematic diagram of the matching state of the present invention and the head support frame. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial technical effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the scope of protection of the present invention.

[0029] It should be understood that, in this document, the expressions "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance, nor should they be understood as implicitly indicating the number of technical features indicated. Features defined as "first" or "second" may explicitly or implicitly indicate that at least one of the features is included.

[0030] like Figure 1-Figure 7 A head positioning device for magnetic resonance examination of brachial plexus nerve of infants is shown, comprising a base 10 and a protective seat 20 arranged on the edge of the top surface of the base 10, the protective seat 20 is in a U-shaped structure, and a U-shaped accommodating cavity 200 for accommodating the head is formed in the protective seat 20; a plurality of first supporting protrusions 21 for supporting the side of the head are arranged at the arc-shaped inner wall of the accommodating cavity 200, and the first supporting protrusions 21 are connected to the protective seat 20 as a whole; the protective seat 20 and the first supporting protrusions 21 are both made of rubber material, a main medium cavity 201 is arranged in the protective seat 20, a first medium cavity 210 is arranged in the first supporting protrusions 21, a first guide hole 202 for connecting the main medium cavity and the first medium cavity 210 is arranged on the inner wall of the protective seat 20, and a valve group 6 for adjusting the medium pressure in the main medium cavity 201 is arranged on the protective seat 20.

[0031] The side of the first support protrusion 21 facing the center of the accommodating cavity 200 is configured as an arc surface, a gap is provided between the lower end of the first support protrusion 21 and the base 10, and adjacent first support protrusions 21 do not contact each other; second support protrusions 22 for supporting the lower jaw are provided on the two side walls opposite to the open end of the accommodating cavity 200, the side of the second support protrusion 22 is connected to the protective seat 20 as a whole, a gap is provided between the lower end of the second support protrusion 22 and the base 10, the outer surface of the second support protrusion 22 is configured as an arc surface, and the length of the second support protrusion 22 is greater than that of the first support protrusion 21; a second medium cavity 220 is provided in the second support protrusion 22, and a second guide hole 203 for connecting the main medium cavity 201 and the second medium cavity 220 is provided on the inner wall of the protective seat 20.

[0032] A support pad 30 for supporting the back of the head is provided at a position corresponding to the center of the accommodating cavity 200 and the top surface of the base 10, wherein the support pad 30 is provided with an independent third medium cavity 300; the third medium cavity 300 is connected to the valve group 6 through a flow guide tube 31, and the internal medium pressure is independently adjusted through the valve group 6; the third medium cavity 300 is a columnar structure, and a plurality of annularly distributed diaphragms 301 are provided in the third medium cavity 300, and the diaphragms 301 divide the third medium cavity 300 into a plurality of annular support cavities 302, and a third flow guide hole connection 303 for connecting adjacent annular support cavities 302 is provided on the diaphragm 301.

[0033] The medium in the main medium cavity 201, the first medium cavity 210, and the second medium cavity 220 is the same and configured as either water or air; the medium in the third medium cavity 300 is configured as either water or air. In this embodiment, the base, the protective seat, the first support protrusion, the second support protrusion, and the support pad are all made of silicone to form an integrated structure; the medium filled in the main medium cavity 201, the first medium cavity 210, the second medium cavity 220, and the third medium cavity 300 is air. Fig.10 As shown, a hand-pinch inflatable balloon 3 (same or similar in structure to the inflatable balloon of a mercury sphygmomanometer, directly purchased) is directly connected to the valve group for inflating, which is very convenient to use; in some other embodiments, the medium filled in the main medium cavity 201, the first medium cavity 210, the second medium cavity 220, and the third medium cavity 300 can be water. When the medium is water, a syringe can be used to inject water through the valve group; in some other embodiments, the medium of the third medium cavity 300 is water, and the medium of the main medium cavity 201, the first medium cavity 210, and the second medium cavity 220 is air. In theory, any liquid or gaseous medium that has no interference or little interference with magnetic resonance imaging can be used. Water and air are used as the medium, which, on the one hand, is low-cost and easy to obtain, and on the other hand, is pollution-free.

[0034] like Figure 6 and Figure 7As shown, the valve group 6 includes a valve seat 60, two air inlet channels 61 arranged in the valve seat, one of the air inlet channels is connected to the main medium chamber 201, and the other air inlet channel is connected to the guide tube 301, and each air inlet channel 61 is provided with an air inlet check valve 62; an exhaust mechanism 63 is also provided in the valve seat 60; the exhaust mechanism 63 includes an exhaust channel 630 and an exhaust port 631, the two ends of the exhaust channel 630 are respectively connected to the inner end side walls of the two air inlet channels 61, and the middle part of the exhaust channel 630 is connected to the exhaust port 631, and the valve seat 60 is provided with a knob switch 632 for controlling the exhaust channel to be turned on and off at the corresponding positions of the two ends of the exhaust channel.

[0035] like Figure 8 and Fig. 9 As shown, the outer side of the protective seat 20 is provided with a protective sleeve 40 adapted to its profile, and the protective sleeve 40 is provided with a evacuation hole 41 at the position corresponding to the outer end of each first supporting protrusion 21 and each second supporting protrusion 22; when the medium of preset pressure is rushed into the first medium cavity 210 and the second medium cavity 220, the outer ends of the first supporting protrusion 21 and the second supporting protrusion 22 expand from the evacuation hole 41 into the accommodating cavity 200. A connecting sleeve 42 is provided at the bottom of the base 10, and a plurality of first Velcro strips 400 are provided on the side wall of the protective sleeve 40, and a connecting belt 420 for bonding with the first Velcro strips is provided on the connecting sleeve 42; and a second Velcro strip 401 is provided on the top surface of the protective sleeve 40.

[0036] In conjunction with the accompanying drawings, the principles of the present invention are as follows: Fig.10 As shown, when a child needs to undergo a brachial plexus examination, the head positioning device is placed in the head support frame 2 of the magnetic resonance device, and a layer of disposable non-woven fabric is placed in the accommodating cavity, and the edge of the non-woven fabric is bonded to the second Velcro; when the child lies down, the head is placed in the accommodating cavity 200, and the pipe of the hand-pinch inflatable balloon 3 is connected to the valve group 6, and air is manually injected into the main medium cavity, and the ends of the first support protrusion and the second support protrusion expand toward the accommodating cavity, so that the first support protrusion 21 supports and limits the child's head, and the second support protrusion is against the mandible to support the mandible; then the pipe of the hand-pinch inflatable balloon 3 is connected to another air inlet channel, and air is rushed into the third medium cavity through the airway to change the support height of the back of the head, so that the mandible is retracted and against the second support protrusion 22. Then, a magnetic resonance examination is performed. During the magnetic resonance examination of the brachial plexus, the child's head can maintain a good detection posture more easily, naturally and comfortably, thereby improving the imaging quality and the accuracy of the examination. By adjusting the pressure of the medium, the head positioning can be adapted to children of various head shapes and sizes, and the device has strong versatility.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by up, down, left, right, inside, outside, one end, the other end, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of more clearly describing the technical solution of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific orientation, and cannot be understood as a limitation of the present invention.

[0038] Although specific embodiments of the present invention are described in detail herein, they are provided for the purpose of explanation only and should not be considered to limit the scope of the present invention. Various substitutions, changes and modifications may be conceived without departing from the spirit and scope of the present invention.

Claims

1. A head positioning device for magnetic resonance examination of the brachial plexus of infants and young children, characterized in that: The invention comprises a base (10) and a protective seat (20) arranged on the edge of the top surface of the base (10); the protective seat (20) is in a U-shaped structure; a U-shaped accommodating cavity (200) for accommodating a head is formed in the protective seat (20); a plurality of first supporting protrusions (21) for supporting the side periphery of the head are arranged on the arc-shaped inner wall of the accommodating cavity (200); the first supporting protrusions (21) are connected to the protective seat (20) as a whole; The protective seat (20) and the first supporting protrusion (21) are both made of rubber-like materials; a main medium cavity (201) is provided in the protective seat (20); a first medium cavity (210) is provided in the first supporting protrusion (21); a first flow guide hole (202) for connecting the main medium cavity and the first medium cavity (210) is provided on the inner wall of the protective seat (20); and a valve group (6) for adjusting the medium pressure in the main medium cavity (201) is provided on the protective seat (20).

2. The head positioning device for MRI examination of the brachial plexus nerve of infants according to claim 1, characterized in that: A surface of the first supporting protrusion (21) facing the center of the accommodating cavity (200) is configured as an arc surface, a gap is provided between the lower end of the first supporting protrusion (21) and the base (10), and adjacent first supporting protrusions (21) do not contact each other.

3. A head positioning device for infant brachial plexus magnetic resonance examination according to claim 1 or 2, characterized in that: Second supporting protrusions (22) for supporting the lower jaw are provided on two side walls opposite to the opening end of the accommodating cavity (200); the side surface of the second supporting protrusion (22) is integrally connected to the protective seat (20); a gap is provided between the lower end of the second supporting protrusion (22) and the base (10); the outer surface of the second supporting protrusion (22) is configured as an arc surface; and the length of the second supporting protrusion (22) is greater than that of the first supporting protrusion (21); A second medium cavity (220) is provided in the second supporting protrusion (22), and a second flow guide hole (203) for connecting the main medium cavity (201) and the second medium cavity (220) is provided on the inner wall of the protection seat (20).

4. The head positioning device for MRI examination of the brachial plexus nerve of infants according to claim 3 is characterized in that: A support pad (30) for supporting the back of the head is provided at a position corresponding to the top surface of the base (10) and the center of the accommodating cavity (200), and an independent third medium cavity (300) is provided inside the support pad (30); the third medium cavity (300) is connected to the valve group (6) via a flow guide tube (31), and the internal medium pressure is independently adjusted via the valve group (6).

5. The head positioning device for infant brachial plexus magnetic resonance examination according to claim 4 is characterized in that: The third medium cavity (300) is a columnar structure. A plurality of annularly distributed diaphragms (301) are arranged in the third medium cavity (300). The diaphragms (301) divide the third medium cavity (300) into a plurality of annular support cavities (302). The diaphragms (301) are provided with third flow guide holes (303) for connecting adjacent annular support cavities (302).

6. The head positioning device for MRI examination of the brachial plexus nerve of infants according to claim 4, characterized in that: The media in the main medium cavity (201), the first medium cavity (210), and the second medium cavity (220) are the same and are configured as either water or air; the medium in the third medium cavity (300) is configured as either water or air.

7. The head positioning device for infant brachial plexus magnetic resonance examination according to claim 4 is characterized in that: The valve group (6) comprises a valve seat (60), two air intake channels (61) arranged in the valve seat, one of which is in communication with the main medium chamber (201), and the other is in communication with the flow guide tube (301), and each of which is provided with an air intake check valve (62); and an exhaust mechanism (63) is also provided in the valve seat (60).

8. The head positioning device for infant brachial plexus magnetic resonance examination according to claim 7, characterized in that: The exhaust mechanism (63) comprises an exhaust channel (630) and an exhaust port (631); the two ends of the exhaust channel (630) are respectively connected to the inner end side walls of the two intake channels (61); the middle portion of the exhaust channel (630) is connected to the exhaust port (631); and knob switches (632) for controlling the on-off of the exhaust channel are provided at positions corresponding to the two ends of the exhaust channel on the valve seat (60).

9. The head positioning device for infant brachial plexus magnetic resonance examination according to claim 3, characterized in that: The outer side of the protection seat (20) is provided with a protection sleeve (40) adapted to its contour, and the protection sleeve (40) is provided with avoidance holes (41) at positions corresponding to the outer ends of each first supporting protrusion (21) and each second supporting protrusion (22); When a medium of preset pressure is rushed into the first medium cavity (210) and the second medium cavity (220), the outer ends of the first supporting protrusion (21) and the second supporting protrusion (22) expand from the avoidance hole (41) into the accommodating cavity (200).

10. The head positioning device for infant brachial plexus magnetic resonance examination according to claim 9, characterized in that: The bottom of the base (10) is provided with a connecting sleeve (42), the side wall of the protective sleeve (40) is provided with a plurality of first Velcro strips (400), and the connecting sleeve (42) is provided with a connecting belt (420) for bonding with the first Velcro strips; the top surface of the protective sleeve (40) is provided with a second Velcro strip (401).

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