Fixture release system and head and neck fixation device

Abstract

To provide a fixture release system that can quickly release a fixture in emergency situations during the head and neck intensity modulated radiation therapy.SOLUTION: A fixture release system 5 is the system for releasing a fixture 3 in a head and neck fixation device 1 which includes: a bed 2 for supporting a patient; the fixture 3 for securing the head and neck of the patient; and multiple fasteners 4 for fixing the fixture 3 to the bed 2. The system includes: multiple force application mechanisms 20 which are arranged correspondingly to each fastener 4 to exert a releasing force on the fasteners 4 when activated; multiple wires 30 which are connected to each force application mechanism 20 to transmit the tension for activating the force application mechanisms 20; and a tension mechanism 40 which connects the multiple wires 30 and simultaneously applies the tension to the multiple wires collectively.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a fixation device release system and a head and neck fixation device. [Background technology]

[0002] In radiation therapy such as head and neck intensity modulated radiation therapy (IMRT), a fixation device is used to fix the patient in order to reduce errors in patient setup. One of the fixation devices widely used in radiation therapy is a head and neck fixation device that fixes the head, neck, and shoulders with a fixation device such as a thermoplastic mask (hereinafter simply referred to as the "fixation device") as disclosed in Patent Document 1, for example. In the head and neck fixation device, the fixation device is fixed to a treatment bed using a fastener such as a quick fastener. By fixing the fixation device covering several parts of the patient from the head to the shoulders to the bed using the fastener, the patient and the fixation device are in close contact with each other, and the movement of the patient can be suppressed.

[0003] The fixing device (patient restraining member) described in Patent Document 1 is made of a thermoplastic sheet that softens when heated so that it can be molded into a shape corresponding to the body part of the patient to be restrained, and hardens when cooled so that it can retain the molded shape. The fixing device described in Patent Document 1 has a peripheral portion attached to a frame, and the frame is attached to a bed (treatment table), so that the patient can be fixed (restrained) to the bed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2005-537114 Summary of the Invention [Problem to be solved by the invention]

[0005] During radiation therapy, patients may complain of nausea and vomiting. In addition, if a patient develops pneumonia due to aspiration, this can have a negative impact on the outcome of treatment. For this reason, medical staff must pay close attention to the condition of the patient during treatment and must quickly release the patient from immobilization if the patient's condition suddenly changes. In addition, if an emergency such as a natural disaster occurs during radiation therapy, medical staff must quickly release the patient from immobilization.

[0006] However, with the current system, even if an abnormality in the patient is detected, a medical professional (hereinafter referred to as "worker") must turn off the beam and then enter the treatment room to release and remove the immobilization devices from the bed, which can delay response to emergencies such as a sudden change in the patient's condition or a natural disaster.

[0007] In view of the above, an object of the present invention is to provide a fixation device release system that can quickly release a fixation device in an emergency during radiation therapy, and a head and neck fixation device equipped with such a fixation device release system. [Means for solving the problem]

[0008] [1] In order to solve the above problems, the fixation device release system of the present invention is a fixation device release system for releasing the fixation device in a state in which the patient is fixed, in a head and neck fixation device having a bed for supporting a patient in order to fix the patient's head and neck, a fixation device for holding the patient's head and neck toward the bed, and a number of fasteners for fixing the fixation device to the bed, characterized in that it comprises a number of force application mechanisms that are arranged corresponding to each of the multiple fasteners in the state in which the patient is fixed and that apply force to the fasteners to release the fasteners when operated, a number of wires that are connected corresponding to each of the multiple force application mechanisms and transmit tension for operating the force application mechanisms, and a tensioning mechanism that connects the multiple wires and is capable of applying tension to the multiple wires at once.

[0009] [2] In the fastener release system according to the present invention, it is preferable that the tensioning mechanism includes a tensioning member that operates to pull the connection portion of the multiple wires, and an electric motor that generates power electrically and applies power to the tensioning member.

[0010] [3] In the fastener release system according to the present invention, it is preferable that the tensioning mechanism further includes a receiving unit electrically connected to the electric motor and receiving from the outside a wired or wireless signal for operating the electric motor.

[0011] [4] In the fastener release system according to the present invention, it is preferable that the tensioning mechanism includes an input member that changes shape in response to an external input to impart power to the tensioning member without using electricity.

[0012] [5] In the fastener release system according to the present invention, the pulling member is preferably a lever that amplifies force by using the principle of leverage to pull the connected portion of the multiple wires. Includes

[0013] [6] In the fixation device release system according to the present invention, in a head and neck fixation device in which a quick fastener is used as a fastening device, it is preferable to release the fixation device that is immobilizing the patient.

[0014] [7] In the fastener release system of the present invention, it is preferable that the force application mechanism includes a pin that is movable in the vertical direction and a pin receiving base that supports the pin on a slope and is movable in a direction intersecting the vertical direction due to the tension of the wire, and that the upward movement of the pin pushes up the quick fastener from below.

[0015] [8] The head-neck fixation device of the present invention is a head-neck fixation device for fixing the head and neck of a patient, comprising: a bed for supporting the patient; a fixation device for holding the patient's head and neck toward the bed; a plurality of fasteners for fixing the fixation device to the bed; and a fixation device release system for releasing the fixation device when it is fixing the patient, wherein the fixation device release system described above is used as the fixation device release system. Effect of the Invention

[0016] According to the present invention, the fixing device can be quickly released in the event of an emergency. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is an external perspective view showing a part of the head and neck fixation device according to the embodiment. [Diagram 2] FIG. 13 is a cross-sectional view of a portion where the fixture is fixed to the bed by a fastener. [Diagram 3] FIG. 1 is an external perspective view of an embodiment of a fastener release system. [Figure 4] FIG. 2 is a schematic diagram showing a cross-section of an embodiment of a fastener release system. [Diagram 5] 11A to 11C are explanatory diagrams of a release operation by the fastener release system of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the drawings do not necessarily strictly reflect all the actual configurations, and do not show precise dimensions.

[0019] (1. Configuration of head and neck fixation device 1) FIG. 1 is an external perspective view showing a part of a head and neck fixation device 1 of an embodiment. FIG. 2 is a cross-sectional view of a portion where a fixation device 3 is fixed to a bed 2 by a fastener 4. FIG. 3 is an external perspective view of a fixation device release system 5 of an embodiment. FIG. 4 is a schematic diagram showing a cross-section of the fixation device release system 5 of an embodiment. The head and neck fixation device 1 equipped with the fixation device release system 5 of an embodiment will be described with reference to FIGS. 1 to 4. Note that, in the embodiment, for convenience of explanation, the directionality is shown assuming that the patient is lying on a horizontal surface and fixed to the horizontal surface, but depending on the orientation of the surface to which the patient is fixed, the description of the directionality should be appropriately changed to another directionality.

[0020] The head and neck immobilization device 1 is a device for immobilizing the head and neck of a patient so that radiation can be applied to a required area during radiation therapy, such as head and neck intensity modulated radiation therapy (IMRT). The head and neck immobilization device 1 includes a bed 2 for supporting the patient during radiation therapy, a fixture 3 for holding the patient's head and neck, and a plurality of fasteners 4 for fixing the fixture 3 to the bed 2. The head and neck immobilization device 1 further includes a fixture release system 5 for releasing the fixture 3 that is immobilizing the patient.

[0021] The bed 2 is a plate-like member having a patient support surface 2a that supports a lying patient from below during radiation therapy. The bed 2 has a plurality of insertion holes 2b into which fasteners 4, which will be described later, can be inserted, around the area where the head and neck of the lying patient rest. The patient support surface 2a of the bed 2 of the device used for radiation therapy is generally located at a height of about 1.2 m above the ground.

[0022] The fixture 3 has an outer shell structure cover 3a made of thermoplastic resin molded to the shape of the patient's head to neck. The fixture 3 has a flange 3c that spreads outward from the periphery of the outer shell structure cover 3a and has multiple through holes 3b at positions that correspond to the insertion holes 2b when the fixture 3 is placed on the bed 2. When in use, the fixture 3 is placed from above over the head to neck of a patient lying on the bed 2 to hold the patient down.

[0023] The fastener 4 is a pin-shaped part called a quick fastener, which has a pressing part that bulges in the circumferential direction at the center in the longitudinal direction. A plurality of fasteners 4 are prepared, and when the fastener 4 is inserted into the insertion hole 2b of the bed 2 through the through hole 3b from the side of the fastener 3 with the bed 2 overlapped with the fastener 3 as shown in Fig. 2, the pressing part presses down on the fastener 3, and the inserted side part is fixed by receiving the lateral pressure from the bed 2, so that the fastener 3 can be fixed to the bed 2.

[0024] As shown in Figures 3 and 4, the fixture release system 5 comprises a base 10 on which the bed 2 is placed, a force application mechanism 20 attached to the base 10, a wire 30 having one end connected to the force application mechanism 20, and a tensioning mechanism 40 connected to the other end of the wire 30.

[0025] The base 10 is a plate-like member having a bed placement surface 10a that expands to place the bed 2 thereon, and a hollow portion is formed partially below the bed placement surface 10a. The base 10 is made of a low-density material so as to have little effect on radiation therapy, and for example, polyethylene with a thickness of 15 mm can be used. The base 10 is provided with a positioning protrusion for positioning the bed 2, and the bed 2 can be fixed at a predetermined flat position by aligning the positioning protrusion with a positioning hole formed in the bed 2 or the outer periphery of the bed 2. The bed placement surface 10a of the base 10 is provided with a through hole at a position corresponding to the insertion hole 2b of the bed 2 when the bed 2 is placed thereon.

[0026] The force application mechanism 20 is arranged in a hollow portion of the base 10 in correspondence with the fasteners 4 in the state where the patient is immobilized, and applies a force to the fasteners 4 to remove the fasteners 4 during operation. Specifically, the force application mechanism 20 is arranged by being inserted into a through hole provided in the bed placement surface 10a of the base 10 in correspondence with the insertion hole 2b of the bed 2, and includes a cylindrical pin 20a that can move up and down in the through hole of the bed placement surface 10a. The force application mechanism 20 also includes a pin receiving base 20b that has an inclined surface, supports the pin 20a from below, and is pulled by a wire 30 described later to move in a direction intersecting the up and down direction in the hollow portion of the base 10. The force application mechanism 20 also includes a box-shaped pin box 20c that stores the pin 20a and the pin receiving base 20b. A plurality of force application mechanisms 20 are disposed at all through-hole positions provided on the bed mounting surface 10a of the base 10 in correspondence with the insertion holes 2b of the bed 2. When the pin receiving base 20b is pulled by the wire 30 described below, the force application mechanism 20 configured in this manner moves the pin receiving base 20b in a direction intersecting the vertical direction and lifts the pin 20a upward on the slope, so that the pin 20a protrudes, for example, 5 mm to 6 mm from the bed mounting surface 10a of the base 10. Since the force application mechanism 20 operates in this manner, when the bed 2 is placed on the base 10 and a quick fastener serving as the fastener 4 is inserted, a force pushing up the quick fastener from below can be applied as a force for removing the fastener 4 by the upward movement of the pin 20a. The force application mechanism 20 is made of resin to minimize the effect on the radiation dose during radiation therapy. For example, the pin 20a, pin receiving base 20b, and pin box 20c are made of polyacetal, and screws for closing the pin box 20c, etc. are made of RENY.

[0027] The wire 30 is a resin wire, such as a polyester wire, so as to minimize the effect on the radiation dose during radiotherapy. The wire 30 is arranged inside a PTFE outer tube (not shown) so as to reduce the adverse effect of friction on tension transmission even if the wire 30 is arranged in a meandering manner. A plurality of wires 30 are provided, each of which has one end connected to the pin receiving base 20b of each of the plurality of force application mechanisms 20, and transmits tension for operating the force application mechanisms as described above by pulling the other end. The wire 30 is arranged in a meandering manner to avoid being directly under the patient's head and neck so as to minimize the effect on the radiation dose.

[0028] The tensioning mechanism 40 includes a mechanism that connects the plurality of wires 30 and can simultaneously apply tension to the plurality of wires 30. Specifically, the tensioning mechanism 40 includes a connecting portion 41 including a connecting part that connects the plurality of wires 30, a tensioning member 42 that operates to pull the connecting portion 41, an electric motor 43 that generates power electrically and applies power to the tensioning member 42, a receiving portion 44 that is electrically connected to the electric motor 43 and receives a wired or wireless signal from the outside for operating the electric motor 43, and an input member 45 that applies power to the tensioning member 42 without using electricity.

[0029] The connecting portion 41 is connected to the other end of each wire 30 and connects multiple wires 30. The connecting portion 41 may be configured to connect the other ends of all wires 30 together at one location, or may be configured to connect the other ends of the wires 30 to each other in stages at multiple locations, and to connect all wires 30 together in the final stage.

[0030] The pulling member 42 receives power and transmits a pulling force to the connecting portion 41 to which the wires 30 are connected together, thereby applying tension collectively to all of the wires 30. The pulling member may be appropriately configured so as to receive power and transmit a pulling force to the connecting portion 41, but the pulling member 42 in the embodiment is configured as a slide lever that receives power from an electric motor 43 described below and moves in a direction pulling the connecting portion 41, and has a slope and receives a force from an input member 45 described below to push the slope and moves in the direction pulling the connecting portion 41. When power is input to one end portion of the pulling member 42 from an electric motor 43 or an input member 45 described below, the pulling member 42 can pull the connecting portion 41 connected to the other end portion.

[0031] The electric motor 43 is an electric rotary motor, and receives electric power from a motor driver (not shown) in response to a command from a motor controller (not shown) to rotate an output shaft and generate power. The electric motor 43 moves a slide lever constituting the pulling member 42 via a transmission member fixed to the output shaft.

[0032] The receiving unit 44 is connected to a motor controller that controls the operation of the electric motor 43, and receives a command signal for driving the electric motor 43 from a remote location via wired or wireless communication. When the receiving unit 44 receives a command signal, it notifies the motor controller that it has received the command signal. After that, the motor controller receives the command signal transmitted from the receiving unit 44 and drives the electric motor 43, and the wire 30 is pulled.

[0033] The input member 45 changes shape upon receiving an external input, thereby applying power to the pulling member 42 without using electricity. As an example, the input member 45 is a push button having a knob and a shaft extending downward from the knob, and when a force is applied to the knob from above, the knob and the shaft are pushed downward and move together. The input member 45 is arranged so that the tip of the shaft can push the inclined surface of the slide lever that constitutes the pulling member 42. This allows the input member 45 to manually apply power to the pulling member 42 to move it in the direction of pulling the wire. The input member 45 is arranged in a position within reach of a patient undergoing radiation therapy.

[0034] (2. Operation of Fixture Release System 5) FIG. 1 is an external perspective view showing a part of the head and neck fixation device 1, and a patient is indicated by a dashed line. FIG. 5 is an explanatory diagram of the release operation by the fixation device release system 5 of the embodiment. FIG. 5(a) shows a state in which the fixation device 3 is not released. FIG. 5(b) shows a first release operation of the fixation device release system 5. FIG. 5(c) shows a second release operation of the fixation device release system 5. The operation of the fixation device release system 5 will be described below with reference to FIGS. 1 and 5.

[0035] During radiation therapy, as shown in FIG. 1, the patient lies on the bed 2 placed on the base 10 of the fixation device release system 5, and the head to neck is covered with the fixation device 3. At this time, the fixation device 3 is fixed to the bed 2 by the fastener 4, so that the patient is firmly fixed to the head and neck fixation device 1 from the head to the neck. The state in which the patient is firmly fixed allows radiation to be effectively applied to the necessary parts during radiation therapy, but as mentioned above, since the bed 2 is generally located at a height of about 1.2 m above the ground, there is a risk of serious damage to the spinal cord if the lower body falls from the bed 2 with only the head and neck fixed. In an emergency, the head and neck fixation device 1 can release the fixation device 3 from the fixation state to the bed 2 by operating the fixation device release system 5 to remove the fastener 4 as shown below.

[0036] First, the first release operation of the fixture release system 5 is an operation in which, from a state in which the fixture 3 is not released as shown in FIG. 5(a), an operator who is monitoring the state during radiation therapy in a remote place such as another room operates a release command member at a remote place to electrically release the fixture 3. As shown in FIG. 5(b), in the first release operation of the fixture release system 5, when an operator operates a release command member at a remote place, the command signal is received by the receiver 44, and a drive command is given to the motor 43, so that the motor 43 starts to drive. When the motor 43 drives, the power moves the pulling member 42, and the pulling member 42 pulls the connecting part 41. Then, the multiple wires 30 connected to the connecting part 41 are pulled together, and the pin receiving bases 20b of the multiple force application mechanisms 20 move, and the multiple pins 20a rise 5 mm to 6 mm from the bed placement surface 10a of the base 10. The multiple fasteners 4 that are fixing the fixture 3 to the bed 2 are lifted up by the multiple pins 20a that have risen, and are collectively removed from the bed 2. As a result, the fixture 3 is released from the state in which it was fixed to the bed 2.

[0037] Next, the second release operation of the fixture release system 5 is an operation in which the patient manually releases the fixture 3 by operating the input member 45 when the fixture 3 is not released as shown in FIG. 5(a) and the motor 43 cannot be driven due to a power outage or the like. In the first release operation of the fixture release system 5, as shown in FIG. 5(c), when the patient operates the input member 45 located within reach, the knob and shaft of the input member 45 descend to input power for operating the pulling member 42, and the pulling member 42 pulls the connecting part 41. Then, the multiple wires 30 connected to the connecting part 41 are pulled collectively, and the pin receiving bases 20b of the multiple force application mechanisms 20 move, and the multiple pins 20a rise 5 mm to 6 mm from the bed placement surface 10a of the base 10. The multiple fasteners 4 in the state of fixing the fixture 3 to the bed 2 are lifted by the multiple pins 20a that have risen, and are removed from the bed 2 collectively. As a result, the fixture 3 is released from its fixed state to the bed 2.

[0038] (3. Functions and Effects of the Embodiments) A fixation device release system 5 according to the embodiment is provided with a head and neck fixation device 1 having a bed 2, a fixation device 3, and a plurality of fasteners 4 for fixing the fixation device 3 to the bed 2, a plurality of force application mechanisms 20 that are arranged corresponding to the plurality of fasteners 4 and apply a force to the fasteners 4 to remove the fasteners 4 when the fasteners 4 are operated, a plurality of wires 30 that are connected corresponding to the plurality of force application mechanisms 20 and transmit a tension for operating the force application mechanisms 20, and a tensioning mechanism 40 that connects the plurality of wires 30 and can simultaneously apply tension to the plurality of wires 30 all at once. Therefore, according to the fixation device release system 5, tension can be simultaneously applied to the plurality of wires 30 all at once by the tensioning mechanism 40, and a force to remove the plurality of fasteners 4 can be applied all at once by the force application mechanism 20, so that the fixation device 3 can be quickly released in an emergency.

[0039] Furthermore, according to the fixing device release system 5, the pulling mechanism unit 40 includes a connecting portion 41 which is the connecting portion of the multiple wires 30, a pulling member 42 which operates to pull the connecting portion 41, and an electric motor 43 which generates power electrically and applies the power to the pulling member 42. Therefore, a force to remove the fasteners 4 can be applied electrically all at once, and the fixing devices 3 can be released quickly and without hassle.

[0040] According to the fixing device release system 5, the tensioning mechanism unit 40 is electrically connected to the electric motor 43 and includes a receiving unit 44 that receives a wired or wireless signal from the outside for operating the electric motor 43. Since the system can be operated from a remote location, the time it takes for an operator to rush to the treatment room in an emergency can be shortened, and the fixing device 3 can be released quickly.

[0041] According to the fastener release system 5, the tensioning mechanism 40 changes shape in response to an external input, and includes an input member 45 that applies power to the tensioning member 42 without using electricity. Therefore, even if a malfunction occurs in the electrically driven parts such as the electric motor 43 or wireless / wired communications, a force can be applied to all the fasteners 4 to remove them at once, and the fasteners 3 can be released quickly.

[0042] By constructing a mechanism for simultaneously protruding all pins 20a, like the fixation device release system 5, it is possible to construct a system for quickly releasing the fixation devices 3 of a head and neck fixation device 1 that uses quick fasteners as the fasteners 4.

[0043] In particular, if the force application mechanism 20 is configured as in the fixation device release system 5, which is equipped with a pin 20a that can move in the vertical direction and a pin receiving base 20b that supports the pin 20a on a slope and can move in a direction intersecting the vertical direction due to the tension of the wire 30, and the quick fastener is pushed up from below by the upward movement of the pin 20a, it is possible to optimally construct a system that quickly releases the fixation device 3 of the head and neck fixation device 1 in which a quick fastener is used as the fastener 4.

[0044] Like the head and neck fixation device 1 according to the embodiment, if it is configured to include a bed 2, a fixation device 3, a plurality of fasteners 4 for fixing the fixation device 3 to the bed 2, and a fixation device release system 5 for releasing the fixation device 3, it is possible to obtain the effects of the fixation device release system 5 and to provide a head and neck fixation device that can quickly release the fixation device 3 in an emergency.

[0045] (Other forms) Although the present invention has been described based on the above embodiment, the present invention is not limited to the above embodiment. The present invention can be embodied in various forms without departing from the spirit of the present invention, and for example, the following modifications are also possible.

[0046] (1) The sizes, positions, materials, quantities, connection methods, specific structures, and the like described in the above embodiments are merely examples and may be changed without impairing the effects of the present invention.

[0047] (2) In the above embodiment, a quick fastener is used as the fastener, but the present invention is not limited to this. For example, other fasteners such as buttons, slide levers, magnets, rubber bands, and hook-and-loop fasteners that are not called quick fasteners may be used. When a fastener other than a quick fastener is used, a force application mechanism that can apply a force in a direction to remove the fastener may be configured.

[0048] (3) In the above embodiment, the force application mechanism 20 is described as being composed of a pair of pins 20a, a pin receiving stand 20b, and a pin box 20c, but the present invention is not limited to this. For example, the force application mechanism may be configured such that one pin receiving stand is disposed within one pin box, multiple pins are supported on the inclined surface of the pin receiving stand, and the multiple pins are lifted when the pin receiving stand moves.

[0049] (4) In the above embodiment, the force application mechanism 20 has been described as lifting the fastener 4 from below with the pin 20a to remove the fastener 4, but the present invention is not limited to this. Any mechanism may be used that applies a force to the fastener to remove it, and for example, the force application mechanism may apply a force to pull the fastener out from above with a wire or the like. Alternatively, the fastener may be configured as a lever, and the force application mechanism may apply a force to knock the fastener down from the side. Alternatively, the force application mechanism may be formed by integrally molding a claw as the fastener with the fixture, and apply a force to bend the claw.

[0050] (5) In the above embodiment, the pulling member 42 is described as a slide lever that receives power and moves in the direction of pulling the wire, but the present invention is not limited to this. For example, the pulling member may be a rotating lever that amplifies the power using the principle of leverage to pull the connecting parts. If the pulling member is configured to amplify the power using the principle of leverage or the like to pull the connecting parts 41, a force to remove the fasteners 4 all at once can be applied even with a small power, making it possible to configure a smaller and more inexpensive system.

[0051] (6) In the above embodiment, the electric motor 43 is described as a rotary motor, but the present invention is not limited to this. For example, an electric reciprocating cylinder may be used as the electric motor.

[0052] (7) In the above embodiment, the input member 45 is a push button, and the shaft that moves downward is described as applying power to the pulling member 42, but the present invention is not limited to this. The input member may be any member capable of applying power to the pulling member to pull the wire, and may be, for example, a pull knob structure member, a lever structure member, or a dial structure member. However, it is preferable that the input member is configured to be easily operated so that the patient can release the fixation device by himself in an emergency. [Explanation of symbols]

[0053] 1...head and neck immobilization device, 2...bed, 2a...patient support surface, 2b...insertion hole, 3...fixation device, 3a...outer shell structural cover, 3b...through hole, 3c...flange, 4...fastener, 5...fixation device release system, 10...base, 10a...bed support surface, 20...force application mechanism, 20a...pin, 20b...pin receiver, 20c...pin box, 30...wire, 40...tension mechanism, 41...connection portion, 42...tensioning member, 43...motor, 44...receiving portion, 45...input member

Claims

1. A head and neck immobilization device having a bed for supporting a patient in order to immobilize the patient's head and neck, a fixture for holding the patient's head and neck toward the bed, and a plurality of fasteners for fixing the fixture to the bed, comprising: a fixture release system for releasing the fixture in a state in which the patient is immobilized, a plurality of force application mechanisms that are arranged corresponding to the plurality of fasteners when the patient is immobilized and that apply a force to the fasteners to release the fasteners when the force application mechanisms are operated; a plurality of wires connected to the plurality of force application mechanisms, respectively, for transmitting tension for operating the force application mechanisms; a tension mechanism that connects the plurality of wires and can simultaneously apply tension to the plurality of wires; A fastener release system comprising:

2. The tension mechanism includes: A pulling member that operates to pull the connecting portion of the plurality of wires; an electric motor that generates power by electric current and applies the power to the pulling member; The fastener release system of claim 1 , comprising:

3. Furthermore, the tension mechanism includes: a receiving unit electrically connected to the electric motor and configured to receive a wired or wireless signal for operating the electric motor from an external source; The fastener release system of claim 2 , comprising:

4. The tension mechanism includes:

3. The fastener release system of claim 2, further comprising an input member that changes configuration in response to an external input to provide non-electrical power to said tensioning motion member.

5. 3. The fastener release system according to claim 2, wherein the pulling member is a lever that amplifies force by using the principle of leverage to pull the connected portion of the plurality of wires.

6. 2. The fixation device release system according to claim 1, for releasing the fixation device in a state where the fixation device is fixed to a patient in a head and neck fixation device using a quick fastener as the fastening device.

7. The force application mechanism includes: A pin that can move in the vertical direction; a pin support that supports the pin on a slope and is movable in a direction intersecting the vertical direction by tension of the wire; The fastener release system according to claim 6, further comprising: a fastener release mechanism for releasing said fastener from below, said fastener release mechanism including ...

8. A head and neck immobilization device for immobilizing the head and neck of a patient, comprising: a bed for supporting a patient; A fixture for holding the patient's head and neck toward the bed; a plurality of fasteners for fastening the fixture to the bed; a fixation device release system for releasing the fixation device that is immobilizing the patient; Equipped with A head and neck fixation device, comprising the fixation device release system according to any one of claims 1 to 7.

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