Defibrillator

Abstract

To provide a defibrillator that can be used in more reliable and accurate work procedures even by an operator who is not used to using a defibrillator.SOLUTION: A defibrillator includes a detection unit for detecting a use state of a defibrillator by an operator and an output unit for outputting a guidance on the use method of the defibrillator according to the detected use state. The detection unit detects the change in the use state in a period before timing that a pair of pads of the defibrillator is stuck onto the skin of an object person from timing that the defibrillator is activated.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a defibrillator.

[0002] Conventionally, technologies related to defibrillators such as AEDs (Automated External Defibrillators) are known. For example, Patent Document 1 discloses a defibrillation pad in which an electrical connection of an electrical connection pattern having a predetermined electrical resistance value is disconnected when a pair of electrode pads are separated and attached to a living body for use. According to such a defibrillation pad, it is possible to detect whether the electrode pads stored in the package have been used.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, operators who use defibrillators are often unfamiliar with the use of defibrillators. An object of the present disclosure is to provide a defibrillator that allows an operator who is unfamiliar with the use of a defibrillator to use the defibrillator with a more reliable and accurate operation procedure.

Means for Solving the Problems

[0005] A defibrillator according to one aspect of the present disclosure includes a detection unit that detects the usage state of the defibrillator by an operator, and an output unit that outputs guidance on how to use the defibrillator according to the detected usage state, and the detection unit detects a change in the usage state during a period before the timing when a pair of pads of the defibrillator are attached to the skin of a subject from the timing when the defibrillator is activated.

Advantages of the Invention

[0006] According to the present disclosure, even an operator who is not used to using a defibrillator can use it with a more reliable and accurate operation procedure.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0008] Hereinafter, a defibrillator according to the present disclosure will be described with reference to the drawings. Note that, for members having the same reference numerals as those already described in the description of the embodiment, the description thereof will be omitted for convenience of explanation. In addition, the dimensions of each member shown in the drawings may be different from the actual dimensions of each member for convenience of explanation.

[0009] [Configuration of AED] Here, an AED1, which is an example of a defibrillator according to the present disclosure, will be described. FIG. 1 is an external view of the AED1 according to an embodiment of the present disclosure. As shown in FIG. 1, the AED1 includes an AED main body 10, a battery pack 11, a lid portion 12, a cable 13, and a pair of electrode pads 14 and 15.

[0010] The battery pack 11 supplies power to the AED main body 10 to operate the AED main body 10 and the electrode pads 14, 15. Also, the battery pack 11 is connected to the back side of the AED main body 10 in a removable structure.

[0011] The lid portion 12 is structured to cover the AED main body 10. When the lid portion 12 changes from the closed state to the open state, the main power supply of the AED 1 is turned on and the AED 1 starts up. Also, when the lid portion 12 changes from the open state to the closed state, the main power supply of the AED 1 is turned off. Note that the AED 1 is not limited to a configuration that switches the ON / OFF of the main power supply according to the opening and closing of the lid portion 12. For example, a power button for switching the ON / OFF of the main power supply may be provided on the AED main body 10.

[0012] Each of the electrode pads 14, 15 contains a gel having adhesiveness. When the AED 1 is not in use, the electrode pads 14, 15 are stored in a bag with a release paper attached to each gel. Also, the bag storing the electrode pads 14, 15 is attached inside the lid portion 12, for example. An operator using the AED 1 removes the bag from the lid portion 12 and takes out the electrode pads 14, 15 from the bag. Then, the operator attaches the gel portion to the skin of the subject, who is the injured person, with the electrode pads 14, 15 peeled off from the release paper.

[0013] The cable 13 electrically connects the AED main body 10 and the electrode pads 14, 15. The AED main body 10 performs processes such as electrocardiogram analysis and electric shock (hereinafter also referred to as "discharge process") on the subject in a state where the electrode pads 14, 15 are attached to the subject.

[0014] Figure 2 is a block diagram showing the configuration of the AED 1 shown in Figure 1. As shown in Figures 1 and 2, the AED main body 10 has a screen display unit 100, a sound output unit 101, and an indicator 102 as a user interface. The battery pack 11 has battery cells 11A.

[0015] The screen display unit 100 is a display capable of displaying illustrations, characters, etc., and visually displays guidance to the operator, such as the method of attaching the electrode pads 14 and 15 and the method of processing electric shocks.

[0016] The sound output unit 101 is, for example, a speaker, and aurally notifies the operator of guidance voice to the operator and warning sounds indicating that a high voltage is charged inside the AED main body 10.

[0017] The indicator 102 is composed of a lamp or the like that can be lit or blinked, and visually displays to the operator whether the AED 1 is in a usable state or the like.

[0018] Also, as shown in FIG. 2, in addition to the screen display unit 100, the sound output unit 101, and the indicator 102, the AED main body 10 further includes a control unit 103, a storage unit 104, a high voltage unit 105, and an electrocardiogram analysis unit 106. The storage unit 104 stores programs and the like for controlling various operations of the AED 1.

[0019] When the AED 1 is activated, the control unit 103 reads and executes programs and the like stored in the storage unit 104, and controls various operations of the AED 1. More specifically, the control unit 103 includes an output control unit 131, a power supply control unit 132, a detection unit 133, and an electrode pad control unit 134.

[0020] The output control unit 131 includes a display control unit 141 and a sound control unit 142. The display control unit 141 reads image data related to guidance to the operator from the storage unit 104 and outputs the read image data to the screen display unit 100. When the screen display unit 100 receives the image data output from the display control unit 141, it displays an image based on the image data.

[0021] In addition, the display control unit 141 outputs a control signal for a lamp or the like of the indicator 102 to the indicator 102 in order to notify the operator whether the AED1 is in an available state. The indicator 102 lights up, turns off, or blinks based on the received control signal.

[0022] The sound control unit 142 reads sound data such as voice guidance and warning sounds for the operator from the storage unit 104, and outputs the read sound data to the sound output unit 101. When receiving the sound data output from the sound control unit 142, the sound output unit 101 outputs a voice or a warning sound based on the sound data.

[0023] The power control unit 132 controls the battery cell 11A and the internal capacitor so as to charge the internal capacitor of the high-voltage unit 105 with the battery cell 11A and discharge from the electrode pads 14 and 15.

[0024] The detection unit 133 detects the usage state of the AED1 by the operator. For example, as the detection of the usage state of the AED1, the detection unit 133 determines whether or not a pair of electrode pads 14 and 15 are attached to the skin of the subject. Details of the detection by the detection unit 133 will be described later.

[0025] When the electrode pad control unit 134 detects by the detection unit 133 that a pair of electrode pads 14 and 15 are attached to the subject, the electrode pad control unit 134 controls the electrode pads 14 and 15 and the electrocardiogram analysis unit 106 so as to cause the electrocardiogram analysis unit 106 to perform electrocardiogram analysis. The electrocardiogram analysis unit 106 performs electrocardiogram analysis of the subject through the electrode pads 14 and 15 under the control of the electrode pad control unit 134.

[0026] [Description of the problem] Here, problems when using a conventional AED will be described. FIG. 3 is a flowchart for explaining the guidance flow when using a conventional AED. As shown in FIG. 3, first, when the AED is activated, for example, in order to inform the operator of the current operation mode, it outputs a voice of "It is in the child to adult mode" (step S11).

[0027] Next, as guidance for the operator, the AED outputs a voice such as, for example, "Please confirm no response and no breathing" (step S12), and further outputs a voice such as, "Expose your chest and take out the square bag from the lid of the AED" (step S13).

[0028] Next, in order to prompt the operator to take out the electrode pads 14 and 15 from the bag, the AED outputs a voice such as, for example, "Please tear the bag and take out the pads" (step S14).

[0029] Next, in order to prompt the operator to peel the electrode pads 14 and 15 from the release paper and attach them to the subject, the AED repeatedly outputs a voice such as, for example, "Peel the pads from the sheet and attach them to the right chest and left lower abdomen" five times (step S15). Further, the AED displays a screen on the display in accordance with the content of the voice guidance.

[0030] Next, the AED determines whether the two electrode pads are attached to the subject (step S16). And when the two electrode pads are not attached to the subject ( "NO" in step S16), the AED determines, for example, whether the guidance outputs shown in steps S13 to S15 have been performed three times (step S17).

[0031] Next, when the guidance outputs shown in steps S13 to S15 have not been performed three times ( "NO" in step S17), the AED outputs a voice such as, for example, "I will guide you again" (step S18), and performs the operations after step S13 again.

[0032] On the one hand, if the two electrode pads are not attached to the subject ( "NO" in step S16), and it is assumed that the guidance output shown from step S13 to step S15 has been performed three times ( "YES" in step S17). In this case, the AED outputs, for example, a voice message "If it has already been attached, please check the connection between the pad and the AED" to prompt the operator to check the connection state of the electrode pads (step S19), and then ends the guidance.

[0033] Also, when the AED determines that the two electrode pads are attached to the subject ( "YES" in step S16), for example, as guidance for performing electrocardiogram analysis, it outputs a voice message "Measuring electrocardiogram. Please stay away from the patient" (step S20). Then, the AED performs rescue treatment on the subject, such as performing electrocardiogram analysis and discharge treatment on the subject (step S21).

[0034] As described above, in the conventional AED, the guidance after step S13 is repeated until it is detected that the two electrode pads are attached to the subject. Therefore, for example, even in a situation where the first electrode pad has already been attached, that is, a situation where the electrode pad has already been taken out of the bag, guidance to prompt removing the lid of the electrode pad bag or taking out the electrode pad from the bag is output.

[0035] In contrast, in the AED1 of the present invention, as follows, the use state of the AED1 is detected, and more appropriate guidance is output according to the use state.

[0036] [Detection of Changes in the Use State of the AED] Referring again to FIG. 2, the detection unit 133 of the AED 1 according to the embodiment of the present disclosure detects a change in the usage state of the AED 1 in a period before the timing when the pair of electrode pads 14 and 15 are attached to the skin of the subject from the timing when the AED 1 is activated. For example, the detection unit 133 constantly acquires the impedance between the pair of electrode pads 14 and 15. Then, the detection unit 133 detects a change in the usage state of the AED 1 in the above period based on the acquired impedance.

[0037] FIG. 4 is a graph showing the change in impedance between the pair of electrode pads 14 and 15 shown in FIG. 1. In the graph shown in FIG. 4, the horizontal axis represents time, and the vertical axis represents the impedance between the pair of electrode pads 14 and 15.

[0038] Referring to FIGS. 2 and 4, assume that the AED 1 is activated at time t0. At the timing when the AED 1 is activated, since the release paper is attached to the electrode pads 14 and 15, the impedance between the pair of electrode pads 14 and 15 is low. Hereinafter, the value of the impedance at time t0 is referred to as the "initial value".

[0039] Also, assume that at time t1 after time t0, the impedance has increased by a predetermined value or more from the reference value. In this case, the detection unit 133 determines that at least one of the pair of electrode pads 14 and 15 has been peeled off from the release paper as a change in the usage state of the AED 1. The reference value is preferably the initial value, but may be, for example, the absolute value of the general impedance when the electrode pads 14 and 15 are unused. Then, the detection unit 133 outputs a detection result indicating that at least one of the electrode pads 14 and 15 has been peeled off from the release paper to the output control unit 131.

[0040] Note that the detection unit 133 may determine that at least one of the pair of electrode pads 14 and 15 has been peeled off from the release paper when the impedance becomes equal to or greater than the threshold value.

[0041] Also, assume that at time t2 after time t1, the impedance has dropped by a predetermined value or more from the reference value. In this case, the detection unit 133 determines that the two electrode pads 14 and 15 have been attached to the subject as a change in the usage state of the AED1. As described above, the reference value is preferably the initial value, but it may be a value other than the initial value. Then, the detection unit 133 outputs a detection result indicating that the two electrode pads 14 and 15 have been attached to the subject to the output control unit 131.

[0042] Note that the detection unit 133 may determine that the two electrode pads 14 and 15 have been attached to the subject when the impedance becomes equal to or lower than another threshold value that is lower than the above threshold value.

[0043] Also, the detection unit 133 may be configured to determine whether or not it has detected that the two electrode pads 14 and 15 have been attached to the subject's skin until a predetermined time has elapsed from time t1. In this case, if the detection unit 133 does not detect that both of the electrode pads 14 and 15 have been attached to the subject's skin until a predetermined time has elapsed from time t1, the detection unit 133 outputs a detection result indicating that it has not detected that the electrode pads 14 and 15 have been attached to the output control unit 131.

[0044] [Guidance Output] The output control unit 131 controls the guidance for the operator of the AED1 according to the usage state of the AED1 detected by the detection unit 133. For example, when the detection unit 133 detects that at least one of the electrode pads 14 and 15 has been peeled off from the release paper, the output control unit 131 controls so that the content of the guidance is changed before and after the detection.

[0045] FIG. 5 is a flowchart for explaining an example of the flow of guidance when using the AED1 according to the embodiment of the present disclosure. Here, the period from time t0 to time t1 is referred to as "period TA". Also, the period from time t1 to time t2 is referred to as "period TB".

[0046] First, when the AED1 is activated, the sound control unit 142 outputs a voice, such as "It is in the adult mode from elementary school students", to inform the operator of the current operation mode of the AED1, similar to step S11 shown in FIG. 3 (step S111).

[0047] Next, the sound control unit 142 outputs a voice, such as "Please confirm no response and no breathing", similar to step S12 shown in FIG. 3 (step S112). Also, the sound control unit 142 outputs a voice, such as "Take off your chest clothes and take out the square bag from the lid of the AED", similar to step S13 shown in FIG. 3 (step S113).

[0048] Next, in order to prompt the operator to take out the electrode pads 14 and 15 from the bag and peel the electrode pads 14 and 15 from the release paper, the sound control unit 142 outputs a voice, such as "Tear the bag and take out the pads, and peel the pads from the sheet" (step S114). Note that after the voice output in step S114, a voice such as "I will guide you again" may be output.

[0049] During the period TA from step S111 to step S114, the detection unit 133 constantly detects changes in the usage state of the AED1. And if it is not detected that at least one of the electrode pads 14 and 15 has been peeled from the release paper until a predetermined time has elapsed since the timing when the voice output in step S114 is performed, the AED1 repeats the voice output after step S113, for example.

[0050] Suppose that, at any timing included in period TA, it is detected that at least one of the electrode pads 14 and 15 has been peeled off from the release paper. In this case, a transition is made to period TB. At the timing of the transition to period TB, the operation of taking out the bag containing the electrode pads 14 and 15 from the lid portion 12 (see FIG. 1), opening the bag, and taking out the electrode pads 14 and 15 from the bag has already been performed by the operator. Therefore, the sound control unit 142 in the AED1 changes the content of the guidance and outputs, for example, the voice "Please attach the pads to the right chest and the left hypochondrium" five times repeatedly (step S115).

[0051] Next, the detection unit 133 in the AED1 checks whether the two electrode pads 14 and 15 are attached to the subject (step S116). Then, when the two electrode pads 14 and 15 are not attached to the subject ( "NO" in step S116), the detection unit 133 checks whether a predetermined time has elapsed since the time t1 when it was detected that at least one of the electrode pads 14 and 15 was peeled off from the release paper (step S117).

[0052] Next, when the predetermined time has not elapsed since the time t1 ( "NO" in step S117), the sound control unit 142 outputs, for example, the voice "I will guide you again" (step S118). Then, the AED1 performs the operations after step S115 again. Note that the voice output in step S118 may not be performed.

[0053] On the other hand, assuming that the two electrode pads 14 and 15 are not attached to the subject ( "NO" in step S116) and a predetermined time has elapsed since time t1 ( "YES" in step S17), the sound control unit 142 controls the sound output unit 101 to output guidance that prompts the operator to check the connection state of the AED1, such as "If it has already been attached, please check the connection between the pad and the AED" (step S119). Then, the AED1 performs the operations after step S115 again. Note that after the voice output in step S119, a voice such as "I will guide you again" may be output and the operations after step S115 may be performed.

[0054] Also, when the sound control unit 142 determines that the two electrode pads 14 and 15 are attached to the subject ( "YES" in step S116), it outputs a voice such as "An electrocardiogram is being measured. Please move away from the patient" (step S120). Then, the AED1 performs rescue treatment on the subject, such as electrocardiogram analysis and implementation of an electric shock on the subject (step S121).

[0055] In addition, the display control unit 141 in the AED1 outputs image data to the screen display unit 100 so that a screen corresponding to the guidance content shown in steps S111 to S120 is displayed on the screen display unit 100 in addition to or instead of the voice output by the sound control unit 142.

[0056] As described above, in the AED1, the change in the usage state of the AED1 is detected in the period before the timing when the pair of electrode pads 14 and 15 of the AED1 are attached to the skin of the subject from the timing when the AED1 is activated.

[0057] With such a configuration, it is possible to detect the usage status of the AED1 in a more detailed manner by the operator, and thus it is possible to output more appropriate guidance according to the usage status. And by outputting more appropriate guidance according to the usage status, the work to be done by the operator becomes clear, and even an operator who is not used to using the AED1 can use the AED1 with a more accurate operation procedure more reliably.

[0058] Also, in the AED1, as a change in the usage status, it is possible to detect that the electrode pads 14 and 15 have been peeled off from the release paper to which they were attached. By being able to detect the work required before the pair of electrode pads 14 and 15 are attached to the subject in this way, it is possible to output more appropriate guidance to the operator.

[0059] Also, in the AED1, the content of the guidance is changed before and after it is detected that the electrode pads 14 and 15 have been peeled off from the release paper. With such a configuration, for example, it is possible to avoid repeating unnecessary guidance for the work that has already been executed at the timing of peeling the electrode pads 14 and 15 from the release paper, such as the work of taking out the bag of the electrode pads 14 and 15 and the work of breaking the bag and taking out the electrode pads 14 and 15 from the bag.

[0060] Here, after at least one of the electrode pads 14 and 15 has been peeled off from the release paper, it is highly likely that the pair of electrode pads 14 and 15 will be already attached to the subject's skin before a predetermined time elapses. On the other hand, as described above, in the AED1, even though it is highly likely that the pair of electrode pads 14 and 15 have already been attached, if it is not detected that the pair of electrode pads 14 and 15 have been attached, guidance is output to prompt the operator to check the connection status of the AED1. Therefore, it is possible to improve the abnormal operation of the AED1 caused by a poor connection status.

[0061] Further, in the AED1, based on the impedance between the pair of electrode pads 14 and 15, a change in the usage state of the AED1 is detected. With such a configuration, since a change in the usage state can be detected without attaching a new sensor or the like, an increase in the number of components and an increase in the manufacturing cost can be suppressed.

[0062] Further, in the AED1, when the impedance becomes equal to or higher than a threshold value or when the impedance rises by a predetermined value or more from a reference value, the detection unit 133 determines that at least one of the electrode pads 14 and 15 has been peeled off from the release paper. With such a configuration, it is possible to more accurately detect that at least one of the electrode pads 14 and 15 has been peeled off from the release paper.

[0063] Further, in the AED1, when the impedance becomes equal to or lower than another threshold value or when the impedance drops by a predetermined value or more from a reference value, the detection unit 133 determines that the pair of electrode pads 14 and 15 has been attached to the subject. With such a configuration, it is possible to more accurately detect that the pair of electrode pads 14 and 15 has been attached to the subject.

[0064] [Modification Example] The detection unit 133 shown in FIG. 2 may be configured to detect a change in the usage state of the AED1 using other types of measurement results instead of or in addition to the measurement results of the impedance between the electrode pads 14 and 15.

[0065] For example, in the state where the lid portion 12 shown in FIG. 1 is opened, as described above, it is assumed that the bag for storing the electrode pads 14 and 15 is attached to the lid portion 12. Further, it is assumed that a light sensor 21 is attached to the surface of the bag that contacts the lid portion 12. In this case, the detection unit 133 can detect that the bag has been taken out from the lid portion 12 of the AED1 based on the measurement value by the light sensor 21.

[0066] Further, for example, a photosensor 22 may be attached to the release paper of the electrode pads 14 and 15. In this case, the detection unit 133 can detect, based on the measurement value by the photosensor 22, that the electrode pads 14 and 15 have been peeled off from the release paper, or that the electrode pads 14 and 15 with the release paper attached have been taken out of the bag.

[0067] Further, for example, a photosensor 23 may be attached to the surface of the electrode pads 14 and 15 to which the release paper is attached. In this case, the detection unit 133 can detect, based on the measurement value by the photosensor 23, that the electrode pads 14 and 15 have been peeled off from the release paper, or that the electrode pads 14 and 15 have been attached to the subject.

[0068] Specifically, when the intensity of the brightness measured by the photosensor 23 exceeds the first threshold value, the detection unit 133 can determine that the electrode pad 14 or the electrode pad 15 to which the photosensor 23 is attached has been taken out of the bag. Further, when the intensity of the brightness measured by the photosensor 23 becomes less than a second threshold value that is smaller than the first threshold value after exceeding the first threshold value, the detection unit 133 can determine that the electrode pad 14 or the electrode pad 15 to which the photosensor 23 is attached has been attached to the subject. Since the photosensor 23 can be provided for each of the electrode pads 14 and 15, in addition to detecting the attachment and detachment of the release paper in units of one pad, it is possible to detect the attachment of each pad to the subject.

[0069] As described above, in the AED 1 according to the modification example, based on the measurement values by the photosensors 21, 22, 23, such as the photosensor 23 attached to the electrode pads 14 and 15, it is possible to detect a change in the usage state of the AED 1. According to such a configuration, for example, when the electrode pads 14 and 15 are attached to the skin of the subject, a change appears in the measurement value by the photosensor 23 attached to the electrode pads 14 and 15, so that it is possible to easily detect that the electrode pads 14 and 15 have been attached to the skin of the subject.

[0070] Also, in the AED1 according to the modification example, the usage state of the AED1 by the operator can be detected in a more detailed manner. Therefore, for example, until it is detected that the bags of the electrode pads 14 and 15 are taken out from the lid portion 12, it is possible to output more appropriate guidance according to the usage state of the operator, such as repeating the voice "Please take out the bag from the lid of the AED".

[0071] As described above, the embodiments of the present disclosure have been described. However, the technical scope of the present application should not be construed in a limited manner by the description of the embodiments. It is understood by those skilled in the art that the present embodiment is an example, and various modifications of the embodiments are possible within the scope of the invention described in the claims. The technical scope of the present application should be determined based on the scope of the invention described in the claims and the equivalent scope thereof.

Description of Reference Numerals

[0072] 1: AED (Automated External Defibrillator), 10: AED main body, 11: Battery pack, 11A: Battery cell, 12: Lid portion, 13: Cable, 14, 15: Electrode pads, 21, 22, 23: Optical sensors, 100: Screen display unit, 101: Sound output unit, 102: Indicator, 103: Control unit, 104: Storage unit, 105: High-voltage unit, 106: Electrocardiogram analysis unit, 131: Output control unit, 132: Power control unit, 133: Detection unit, 134: Electrode pad control unit, 141: Display control unit, 142: Sound control unit

Claims

1. A detection unit that detects the usage status of a defibrillator by an operator, and an output control unit that outputs guidance on the usage method of the defibrillator according to the detected usage status, comprising: The detection unit detects a change in the usage status during a period before the timing when a pair of pads of the defibrillator are attached to the skin of a subject from the timing when the defibrillator is activated. A defibrillator.

2. The defibrillator according to claim 1, wherein the detection unit can detect that the pad has been peeled off from the release paper to which the pad was attached as a change in the usage status.

3. The defibrillator according to claim 2, wherein the output control unit changes the content of the guidance before and after the detection unit detects that the pad has been peeled off from the release paper.

4. The detection unit can further detect that a pair of the pads have been attached to the skin of the subject, After the detection unit detects that the pad has been peeled off from the release paper, if the detection unit does not detect that a pair of the pads have been attached to the skin of the subject until a predetermined time has elapsed, the defibrillator The defibrillator according to claim 1 or claim 2, which outputs guidance for prompting confirmation of the connection state of the device.

5. The defibrillator according to claim 1 or claim 2, wherein the detection unit detects a change in the usage status based on the impedance between a pair of the pads.

6. The defibrillator according to claim 5, wherein the detection unit determines that the pad has been peeled off from the release paper when the impedance becomes equal to or greater than a threshold value or when the impedance has increased by a predetermined value or more from a reference value.

7. The defibrillator according to claim 5, wherein the detection unit determines that a pair of the pads have been attached to the subject when the impedance becomes equal to or less than a threshold value or when the impedance has decreased by a predetermined value or more from a reference value.

8. The defibrillator according to claim 1 or claim 2, wherein the detection unit detects a change in the usage status based on a measurement value by an optical sensor attached to the pad.

9. The defibrillator according to claim 8, wherein the detection unit detects, based on the measurement value by the optical sensor, that the pad has been peeled off from the release paper or that the pad has been taken out of the bag as a change in the usage status.

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