Automated external defibrillator

Abstract

To better support the rescuer's movements during cardiopulmonary resuscitation. [Solution] In the AED1, the detection unit 134 detects the patient's body movement during the CPR period after electrocardiogram analysis and discharge processing. The output control unit 131 outputs instructions to the rescuer regarding chest compressions based on whether or not the patient's body movement is present during the CPR period. The output control unit 131 also outputs a continuation instruction D1 to instruct the continuation of chest compressions, and outputs the continuation instruction D1 again when a first time has elapsed since the previous output of the continuation instruction D1. Furthermore, if the patient's body movement is not detected for a period of time shorter than the first time, the output control unit 131 outputs a start instruction D2 to instruct the start of chest compressions with priority over the continuation instruction D1, and outputs the start instruction D2 again when the second time has elapsed.

Description

Technical Field

[0001] The present disclosure relates to an automated external defibrillator.

[0002] In Non-Patent Document 1, it is stipulated that during cardiopulmonary resuscitation (CPR) after electrocardiogram analysis and electrical shock by an automated external defibrillator (AED), chest compressions and artificial respiration for the subject should be continued.

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In addition, based on the number of chest compressions and artificial respiration stipulated in Non-Patent Document 1, during the cardiopulmonary resuscitation period (hereinafter also referred to as the "CPR period"), an automated external defibrillator (hereinafter also referred to as "AED") that periodically gives voice notifications of the continuation instruction for chest compressions is known. However, since the continuation instruction for chest compressions by the automated external defibrillator is notified periodically regardless of whether the rescuer is performing chest compressions, for example, if the rescuer misses the continuation instruction, it may take a long time to figure out what measures should be taken next.

[0005] An object of the present disclosure is to provide an automated external defibrillator that can more appropriately support the movements of a rescuer during the cardiopulmonary resuscitation period.

Means for Solving the Problems

[0006] An automated external defibrillator relating to one aspect of this disclosure is: An automated external defibrillator that performs electrocardiogram analysis and discharge processing on a subject, During the cardiopulmonary resuscitation period following the electrocardiogram analysis and the discharge process, a detection unit detects the body movements of the subject, The system includes an output control unit that outputs instructions to the rescuer regarding chest compressions based on whether or not the subject moves during the cardiopulmonary resuscitation period, The output control unit, It outputs a continue command instructing the continuation of chest compressions, and outputs the continue command again when a first time has elapsed since the previous output of the said continue command. If no body movement of the subject is detected for a period of time shorter than the first period, a start command to begin chest compressions is output with priority over the continuation command, and the start command is output again when the second period has elapsed since the previous output of the start command. [Effects of the Invention]

[0007] According to this disclosure, it is possible to better support the movements of rescuers during cardiopulmonary resuscitation. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is an external view of an AED according to an embodiment of this disclosure. [Figure 2] Figure 2 is a block diagram showing the configuration of the AED shown in Figure 1. [Figure 3] Figure 3 illustrates the output of guidance during the CPR period from an AED in a comparative example. [Figure 4] Figure 4 is a flowchart illustrating an example of the flow of guidance output during the CPR period by an AED according to the embodiment of this disclosure. [Figure 5] Figure 5 is a diagram illustrating an example (Specific Example 1) of the guidance output during the CPR period by the AED relating to this disclosure. [Figure 6]Figure 6 is a diagram illustrating an example (Specific Example 2) of the guidance output during the CPR period by the AED relating to this disclosure. [Figure 7] Figure 7 is a diagram illustrating an example (Specific Example 3) of the guidance output during the CPR period by the AED related to this disclosure. [Figure 8] Figure 8 is a diagram illustrating an example (Specific Example 4) of the guidance output during the CPR period from the AED related to this disclosure. [Figure 9] Figure 9 is a diagram illustrating an example (Specific Example 5) of the guidance output during the CPR period by the AED relating to this disclosure. [Figure 10] Figure 10 is a diagram illustrating an example (Specific Example 6) of the guidance output during the CPR period from the AED related to this disclosure. [Figure 11] Figure 11 is a diagram illustrating an example (Specific Example 7) of the guidance output during the CPR period from the AED related to this disclosure. [Modes for carrying out the invention]

[0009] The automated external defibrillator described herein will be explained below with reference to the drawings. For the sake of clarity, the explanation of components having the same reference numeral as those already described in the description of the embodiments will be omitted. Furthermore, the dimensions of the components shown in these drawings may differ from the actual dimensions of the components, for the sake of clarity.

[0010] [AED Configuration] Here, we will describe an AED1, which is an example of an automated external defibrillator according to this disclosure. Figure 1 is an external view of the AED1 according to an embodiment of this disclosure. As shown in Figure 1, the AED1 comprises an AED body 10, a battery pack 11, a cover 12, a cable 13, and a pair of electrode pads 14 and 15.

[0011] The battery pack 11 supplies power for operating the AED main body 10 to the AED main body 10. Also, the battery pack 11 is connected in a removable structure, for example, to the back side of the AED main body 10.

[0012] The lid 12 has a structure that covers the AED main body 10. When the lid 12 changes from the closed state to the open state, the main power supply of the AED 1 turns on and the AED 1 starts up. Also, when the lid 12 changes from the open state to the closed state, the main power supply of the AED 1 turns 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 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.

[0013] Each of the electrode pads 14 and 15 contains a gel having viscosity. When the AED 1 is not in use, the electrode pads 14 and 15 are stored in a bag with release paper attached to each gel. Also, the bag storing the electrode pads 14 and 15 is attached, for example, inside the lid 12. A rescuer using the AED 1 removes the bag from the lid 12 and takes out the electrode pads 14 and 15 from the bag. Then, the rescuer attaches the gel portion to the subject's skin with the electrode pads 14 and 15 peeled off from the release paper.

[0014] The cable 13 electrically connects the AED main body 10 and the electrode pads 14 and 15. The AED main body 10 performs processes such as electrocardiogram analysis and electric shock (hereinafter referred to as "discharge process") on the subject in a state where the electrode pads 14 and 15 are attached to the subject.

[0015] Figure 2 is a block diagram showing the configuration of the AED 1 shown in Figure 1. As shown in Figure 2, the AED main body 10 includes a sound output unit 101, 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.

[0016] When the AED 1 is activated, the control unit 103 reads and executes programs and the like stored in the storage unit 104 to control various operations of the AED 1. More specifically, the control unit 103 functions as an output control unit 131, an electrode pad control unit 132, a power supply control unit 133, and a detection unit 134.

[0017] The output control unit 131 reads voice data such as guidance voice and warning sound for the rescuer from the storage unit 104 and outputs the read voice data to the voice output unit 101. The voice output unit 101 is, for example, a speaker, and when it receives the voice data output from the output control unit 131, it outputs a voice or a warning sound based on the voice data.

[0018] The electrode pad control unit 132 controls the electrode pads 14, 15 and the electrocardiogram analysis unit 106 so that the electrocardiogram analysis unit 106 performs electrocardiogram analysis. The electrocardiogram analysis unit 106 performs electrocardiogram analysis of the subject through the electrode pads 14, 15 by being controlled by the electrode pad control unit 132.

[0019] After the electrocardiogram analysis by the electrode pad control unit 132, the power supply control unit 133 controls so that the discharge process to the subject is performed. Specifically, the power supply control unit 133 charges the internal capacitor of the high-voltage unit 105 with the battery cell 11A included in the battery pack 11 and controls the battery cell 11A and the internal capacitor so as to discharge from the electrode pads 14, 15.

[0020] The detection unit 134 detects the body movement of the subject. For example, the detection unit 134 obtains the impedance between the pair of electrode pads 14, 15 and detects the body movement of the subject based on the change in impedance. More specifically, the detection unit 134 uses, for example, the amplitude and period of the impedance to detect the presence or absence of the body movement of the subject at an interval of 1 second during the cardiopulmonary resuscitation period after the electrocardiogram analysis of the subject by the electrode pad control unit 132 and the discharge process to the subject by the power supply control unit 133.

[0021] After the approximately 2-minute CPR period is completed, the electrode pad control unit 132 instructs the electrocardiogram analysis unit 106 to perform electrocardiogram analysis again. Then, the power supply control unit 133 controls the system so that the discharge process to the subject is performed again after the electrocardiogram analysis.

[0022] [Output of guidance during the CPR period] As described above, the output control unit 131 in the AED1 outputs voice data to the sound output unit 101, thereby providing guidance to the rescuer. The following describes the output of guidance during the CPR period by the AED in the comparative example and the output of guidance during the CPR period by the AED1 according to the embodiment of this disclosure.

[0023] (Explanation of the comparative example) Figure 3 illustrates the output of guidance during the CPR period from the AED in the comparative example. As shown in Figure 3, the AED in the comparative example first outputs pre-completion guidance D0 before the start of the CPR period. For example, as shown in Figure 3, approximately 7 seconds before the start of the CPR period, the voice output of pre-completion guidance D0 says, "It is safe to touch the body. Immediately begin chest compressions and artificial respiration."

[0024] Then, once the CPR period begins, a continuation instruction D1 is output at the end of each first time interval, instructing the user to continue chest compressions. The AED in the comparative example outputs a voice message as the continuation instruction D1, for example, "Continue chest compressions and artificial respiration." The first time interval is set to approximately 25 seconds, for example, according to the number of chest compressions and artificial respirations defined in Non-Patent Literature 1.

[0025] Specifically, as shown in Figure 3, timing begins from the output timing of the pre-start guidance D0, and the first continuation instruction D1 is output 18 seconds after the start timing of the CPR period. Subsequently, continuation instructions D1 are output 44 seconds, 69 seconds, and 95 seconds after the start timing of the CPR period.

[0026] Furthermore, the AED in the comparative example outputs guidance to instruct the rescuer to move away from the person being treated at a predetermined time before the end of the CPR period (115 seconds after the start of the CPR period in the example shown in Figure 3). For example, the AED outputs the voice message, "You have 5 more shots left. Move away from the person."

[0027] (Summary of the voice notification from the AED in this disclosure) Referring again to Figure 2, the output control unit 131 of the AED1 according to this disclosure changes the content of the guidance to the rescuer regarding chest compressions depending on whether or not the subject moves during the CPR period.

[0028] More specifically, if the subject's body movement is detected, the output control unit 131 outputs a continue instruction D1 after a first time interval, similar to the AED in the comparative example. On the other hand, if the subject's body movement is not detected for a second time or longer, the output control unit 131 determines that chest compressions have not been performed on the subject and outputs a start instruction D2 to instruct the start of chest compressions, prioritizing this over the continue instruction D1.

[0029] The first time period is, for example, 25 seconds, and includes periods that are slightly different from 25 seconds. The second time period is shorter than the first time period. The second time period is, for example, 10 seconds, and includes periods that are slightly different from 10 seconds.

[0030] Specifically, the output control unit 131 outputs a chest compression start command D2 if the detection unit 134 has not detected any movement of the subject in the past 10 seconds. For example, the output of the start command D2 may include a voice message such as, "Please begin chest compressions immediately." If no movement of the subject is detected, the output control unit 131 outputs a start command D2 every two times (approximately 10 seconds) since the previous output of the start command D2.

[0031] Furthermore, if no body movement of the subject is detected during the CPR period until the timing of the output of the initial start command D2, the output control unit 131 outputs a method notification D3 to inform the rescuer of how to perform chest compressions instead of the initial start command D2. Specifically, the output of the method notification D3 is an audio message such as, "Place the base of your palms in the middle of the chest, and place your other hand on top. Straighten both elbows and press down from directly above, in rhythm, so that the chest sinks at least 5 centimeters."

[0032] (Flow of operations) Figure 4 is a flowchart illustrating an example of the flow of guidance output during the CPR period by the AED1 according to the embodiment of this disclosure. First, the output control unit 131 outputs pre-start guidance D0 before the start of the CPR period, and then the CPR period starts (step S11). During the CPR period, the detection unit 134 detects, for example, the presence or absence of body movement of the subject every second.

[0033] Next, during the CPR period, the output control unit 131 checks whether any of the pre-start guidance D0, continuation instruction D1, start instruction D2, and method notification D3 guidance is currently being output, and further checks whether 10 seconds or more have elapsed since the output timing of the previous guidance (step S12).

[0034] Here, we assume that guidance is currently being output, or that 10 seconds or more have not passed since the last guidance output (NO in step S12). In this case, the output control unit 131 does not output guidance and, for example, makes the decision in step S12 again after a predetermined time.

[0035] On the other hand, suppose that no guidance is currently being output and more than 10 seconds have passed since the last guidance was output (YES in step S12). In this case, the output control unit 131 obtains the detection results from the detection unit 134 for the most recent 10 seconds (step S13).

[0036] Next, the output control unit 131 checks whether chest compressions were performed on the subject in the last 10 seconds based on the detection result from the detection unit 134 (step S14). If body movement of the subject is detected in the last 10 seconds, the output control unit 131 determines that chest compressions were performed on the subject in the last 10 seconds (YES in step S14) and outputs a continue instruction D1 at a predetermined timing (step S15).

[0037] On the other hand, if no body movement of the subject has been detected in the last 10 seconds, the output control unit 131 determines that no chest compressions have been performed on the subject in the last 10 seconds ("NO" in step S14). The output control unit 131 then decides which guidance to output: method notification D3 or start instruction D2 (step S16).

[0038] For example, if no body movement is detected after the start of the CPR period and the initial start instruction D2 has not been output, the output control unit 131 decides to output method notification D3 as the guidance to be output (referred to as "method notification D3" in step S16). Then, the output control unit 131 outputs method notification D3 (step S17).

[0039] On the other hand, suppose there is a moment when body movement is detected after the start of the CPR period. In this case, the output control unit 131 decides to output the start instruction D2 as the guidance (in step S16, "start instruction D2"). The output control unit 131 then outputs the start instruction D2 (step S18). The operations from step S12 onward are then repeated until the end of the CPR period. The following describes a specific example of the guidance output by the output control unit 131.

[0040] (Specific example 1) When body movement is detected throughout the entire period of CPR Figure 5 is a diagram illustrating an example (Specific Example 1) of the guidance output during the CPR period by the AED1 according to this disclosure. Here, it is assumed that the subject's body movements were detected by the detection unit 134 (see Figure 2) throughout the entire CPR period. In Figure 5, the area indicating the period during which the subject's body movements were detected is hatched.

[0041] In this case, AED1 first outputs pre-start guidance D0 approximately 7 seconds before the start of the CPR period, similar to the AED in the comparative example shown in Figure 3. Then, timing begins from the output of pre-start guidance D0, and a continue instruction D1 is output approximately every 25 seconds. In the example shown in Figure 5, the continue instruction D1 is output 18 seconds, 44 seconds, 69 seconds, and 95 seconds after the start of the CPR period.

[0042] (Specific example 2) When no body movement is detected throughout the entire period of CPR Figure 6 is a diagram illustrating an example (Specific Example 2) of the guidance output during the CPR period by the AED1 according to this disclosure. Here, it is assumed that no body movement of the subject is detected by the detection unit 134 (see Figure 2) throughout the entire CPR period.

[0043] In this case, AED1 outputs pre-compression guidance D0 before the start of the CPR period. Timing begins from the time the pre-compression guidance D0 is output, and since no body movement of the subject is detected during the approximately 10 seconds that have passed, instead of the initial start instruction D2, a chest compression method notification D3 is output. In the example shown in Figure 6, the method notification D3 is output 4 seconds after the start of the CPR period.

[0044] Then, since no subject movement is detected until approximately 10 seconds have passed since the output timing of method notification D3, the timing for outputting the next start instruction D2 arrives. In the example shown in Figure 6, the timing for outputting the next start instruction D2 is 14 seconds after the start timing of the CPR period.

[0045] Here, if the output timing of the start instruction D2 is included in the output period of the method notification D3, the output control unit 131 outputs the start instruction D2 after the output of the method notification D3 is completed. In the example shown in Figure 6, the output timing of the next start instruction D2 (i.e., 14 seconds after the start timing of the CPR period) is included in the output period of the method notification D3. Therefore, the output control unit 131 outputs the next start instruction D2 after the output of the method notification D3 is completed, specifically 19 seconds after the start timing of the CPR period.

[0046] Subsequently, a start command D2 is output approximately every 10 seconds. In the example shown in Figure 6, the start command D2 is output 29 seconds, 39 seconds, 49 seconds, 59 seconds, 69 seconds, 79 seconds, 89 seconds, and 99 seconds after the start of the CPR period.

[0047] (Specific example 3) If body movement is detected immediately after the start of the CPR period, and no further movement is detected thereafter. Figure 7 is a diagram illustrating an example (Specific Example 3) of the guidance output during the CPR period by the AED1 according to this disclosure. Here, it is assumed that the subject's body movements are detected by the detection unit 134 (see Figure 2) from the start of the CPR period until 1 second later, and no body movements are detected after 1 second. In Figure 7, the area indicating the period during which the subject's body movements were detected is hatched.

[0048] In this case, AED1 outputs pre-start guidance D0 before the start of the CPR period, and timing begins from the time of output of pre-start guidance D0. Since the subject's body movement is detected before the output of the first start command D2, the method notification D3 shown in Figure 6 is not output. The first start command D2 is output approximately 10 seconds after the time when the subject's body movement is no longer detected (1 second after the start of the CPR period in the example shown in Figure 7) (11 seconds after the start of the CPR period in the example shown in Figure 7).

[0049] Subsequently, since no body movement of the subject is detected, the start command D2 is output approximately every 10 seconds. In the example shown in Figure 7, the start command D2 is output 21 seconds, 31 seconds, 41 seconds, 51 seconds, 61 seconds, 71 seconds, 81 seconds, 91 seconds, and 101 seconds after the start of the CPR period.

[0050] (Specific example 4) When no body movement is detected until partway through the CPR period, and then body movement is detected thereafter. Figure 8 is a diagram illustrating an example (Specific Example 4) of the guidance output during the CPR period by the AED1 according to this disclosure. Here, it is assumed that no body movement of the subject was detected by the detection unit 134 (see Figure 2) from the start of the CPR period until 60 seconds later, and that body movement was detected thereafter. In Figure 8, the area indicating the period during which the subject's body movement was detected is hatched.

[0051] In this case, AED1 outputs pre-start guidance D0 before the start of the CPR period. Then, from the start of the CPR period until 59 seconds later, similar to Specific Example 2 shown in Figure 6, method notification D3 is output 4 seconds after the start of the CPR period, and start instruction D2 is output at 19 seconds, 29 seconds, 39 seconds, 49 seconds, and 59 seconds later.

[0052] Furthermore, since the subject's body movement is detected from 60 seconds after the start of the CPR period, the continue command D1 is output at predetermined intervals of approximately 25 seconds, similar to the specific example 1 shown in Figure 5. In the example shown in Figure 8, the continue command D1 is output 69 seconds and 95 seconds after the start of the CPR period.

[0053] (Specific example 5) When the start instruction D2 is being output at the same time as the output timing of the continue instruction D1. Figure 9 is a diagram illustrating an example (Specific Example 5) of the guidance output during the CPR period by the AED1 relating to this disclosure. Here, it is assumed that the subject's body movement is detected immediately after the start of the CPR period, then no body movement is detected for 42 seconds, and then body movement is detected again after 42 seconds. In Figure 9, the area indicating the period during which the subject's body movement was detected is hatched.

[0054] In this case, a pre-start guidance D0 is output before the start of the CPR period, and the first start command D2 is output approximately 10 seconds after the time when no more body movements of the subject are detected (2 seconds after the start of the CPR period in the example shown in Figure 9) (12 seconds after the start of the CPR period in the example shown in Figure 9). Subsequently, a start command D2 is output approximately every 10 seconds thereafter (22 seconds, 32 seconds, and 42 seconds after the start of the CPR period in the example shown in Figure 9).

[0055] Furthermore, since the subject's body movement is detected from 42 seconds after the start of the CPR period, the continuation command D1 is output at predetermined intervals of approximately 25 seconds from 42 seconds onward. Here, we assume that 44 seconds after the start of the CPR period is the next output timing for the continuation command D1. However, we assume that this output timing for the continuation command D1 is included in the output period of the start command D2.

[0056] In such cases, the output control unit 131 does not output the continuation instruction D1, for example, as shown in Figure 9. This prevents the continuation instruction D1 from being output while the start instruction D2 is being output. Alternatively, the output control unit 131 may be configured to output the continuation instruction D1 after the start instruction D2 has been completed.

[0057] (Specific example 6) When body movement is detected while the start command D2 is being output. Figure 10 is a diagram illustrating an example (Specific Example 6) of the guidance output during the CPR period by the AED1 relating to this disclosure. Here, it is assumed that the subject's body movement is detected immediately after the start of the CPR period, then no body movement is detected for 34 seconds, and then body movement is detected again after 34 seconds. In Figure 10, the area indicating the period during which the subject's body movement was detected is hatched.

[0058] In this case, similar to Specific Example 5 shown in Figure 9, pre-start guidance D0 is output before the start of the CPR period, and the first start command D2 is output approximately 10 seconds after the time when the subject's body movement is no longer detected (2 seconds after the start of the CPR period in the example shown in Figure 10) (12 seconds after the start of the CPR period in the example shown in Figure 10). Thereafter, start command D2 is output approximately every 10 seconds (22 seconds and 32 seconds after the start of the CPR period in the example shown in Figure 10).

[0059] Furthermore, since the subject's body movement is detected from 35 seconds after the start of the CPR period, the continuation instruction D1 is output at predetermined intervals of approximately 25 seconds from 35 seconds onward. Here, we assume that the next output timing for the continuation instruction D1 is 44 seconds after the start of the CPR period. And we assume that this output timing for the continuation instruction D1 is not included in the output period of the start instruction D2. In this case, the output control unit 131 outputs the continuation instruction D1 at the timing 44 seconds after the start of the CPR period.

[0060] (Specific example 7) When the start instruction D2 is output and the continuation instruction D1 is already being output. Figure 11 is a diagram illustrating an example (Specific Example 7) of the guidance output during the CPR period by the AED1 relating to this disclosure. Here, it is assumed that the subject's body movements are detected from the start of the CPR period until 60 seconds later, and that no body movements are detected thereafter. In Figure 11, the area indicating the period during which the subject's body movements were detected is hatched.

[0061] In this case, pre-start guidance D0 is output before the start of the CPR period. Timing then begins from the output of pre-start guidance D0, and a continuation instruction D1 is output approximately every 25 seconds. In the example shown in Figure 11, continuation instructions D1 are output 18 seconds, 44 seconds, and 69 seconds after the start of the CPR period.

[0062] Furthermore, since no body movement of the subject is detected after 60 seconds from the start of the CPR period, the start command D2 is output approximately every 10 seconds from about 10 seconds after the point at which body movement is no longer detected (70 seconds from the start of the CPR period in the example shown in Figure 11).

[0063] However, in the example shown in Figure 11, the output timing of the next start instruction D2 (70 seconds after the start timing of the CPR period in the example shown in Figure 11) is included in the output period of the continuation instruction D1. In such cases, the output control unit 131 waits to output the start instruction D2 until the output of the continuation instruction D1 is complete, and outputs the start instruction D2 after the output of the continuation instruction D1 is complete (73 seconds after the start timing of the CPR period in the example shown in Figure 11). This prevents the continuation instruction D1 and the start instruction D2 from being output simultaneously.

[0064] Furthermore, if the start instruction D2 is output immediately after the completion of the continuation instruction D1, the instructions may be difficult for the rescuer to understand. For this reason, the output control unit 131 may be configured to output the start instruction D2 after a predetermined time has elapsed after the completion of the continuation instruction D1. This prevents the continuation instruction D1 and the start instruction D2 from being output consecutively, thus preventing confusion among the rescuer.

[0065] Furthermore, the output control unit 131 may be configured not to output a start instruction D2 immediately following a continuation instruction D1 (in the example shown in Figure 11, the start instruction D2 is output 73 seconds after the start timing of the CPR period).

[0066] Furthermore, the output control unit 131 may be configured to interrupt the output of the continuation instruction D1 and output the start instruction D2 if the output timing of the start instruction D2 falls within the output period of the continuation instruction D1. In such a configuration, if no body movement is detected in the most recent 10 seconds, the start instruction D2 is output preferentially without waiting for the continuation instruction D1 to be completed, thus more clearly prompting the rescuer to resume chest compressions.

[0067] As described above, in AED1, the detection unit 134 detects the patient's body movement during the CPR period after electrocardiogram analysis and discharge processing. The output control unit 131 also outputs instructions to the rescuer regarding chest compressions based on whether or not the patient's body movement is detected during the CPR period. The output control unit 131 also outputs a continuation instruction D1 to instruct the continuation of chest compressions, and outputs the continuation instruction D1 again when a first time has elapsed since the previous output of the continuation instruction D1. Furthermore, if the output control unit 131 does not detect the patient's body movement for a period of time shorter than the first time (2 time), it outputs a start instruction D2 to instruct the start of chest compressions, which takes precedence over the continuation instruction D1, and outputs the start instruction D2 again when the second time has elapsed.

[0068] This configuration allows for prompting the rescuer to begin chest compressions if they have not been performed for more than two hours, thereby providing better support for the rescuer's actions during the CPR period.

[0069] Furthermore, the system can determine whether or not chest compressions are being performed at a second time interval shorter than the first time interval which is the output cycle for the D1 command to continue chest compressions. If chest compressions are not being performed, the system can output the D2 command to start, thus shortening the interruption time in cases where chest compressions are interrupted.

[0070] In addition, in AED1, if no body movement of the subject is detected during the CPR period until the timing of the initial start instruction D2 output, the output control unit 131 outputs a method notification D3 to inform the rescuer of how to perform chest compressions.

[0071] This configuration ensures that if chest compressions have not been performed at all during the CPR period, the rescuer will be notified of the method of chest compressions. Therefore, even if the rescuer is unfamiliar with the method of chest compressions, they will be able to understand and perform them.

[0072] In addition, in AED1, the output control unit 131 outputs pre-resuscitation guidance D0 regarding the subject's cardiopulmonary resuscitation before the start of the CPR period. Furthermore, the output control unit 131 starts timing the output of the pre-resuscitation guidance D0 to determine the timing of outputting the initial continuation instruction D1 and the initial start instruction D2 during the CPR period.

[0073] This configuration allows for the output of the initial continuation instruction D1 or the initial start instruction D2 earlier after the start of the CPR period. Furthermore, if the configuration is such that the chest compression method notification D3 is output at the same time as the initial start instruction D2, the method notification D3 can be output earlier.

[0074] Furthermore, in the AED1, if the output control unit 131 is outputting one of the instructions, the continuation instruction D1 or the start instruction D2, while the other instruction is being output, it will output the other instruction after the other instruction has finished outputting.

[0075] This configuration prevents multiple instructions from being output simultaneously.

[0076] In addition, in AED1, the output control unit 131 outputs the other instruction after a predetermined time has elapsed following the completion of outputting the other instruction.

[0077] This configuration prevents multiple instructions from being issued consecutively, thus preventing confusion among rescuers.

[0078] Furthermore, in the AED1, the output control unit 131 may be configured such that, if it is outputting a start instruction D2 at the timing of outputting a continuation instruction D1, it outputs a continuation instruction D1 after the output of the start instruction D2 is completed, and if it is outputting a continuation instruction D1 at the timing of outputting a start instruction D2, it interrupts the output of the continuation instruction D1 and outputs a start instruction D2.

[0079] This configuration prevents the output of the continuation command D1 while the start command D2 is being output, and if chest compressions on the subject are interrupted for more than two hours, the start command D2 is output before the continuation command D1, thus more clearly prompting the rescuer to resume chest compressions.

[0080] Furthermore, in AED1, if the output control unit 131 is outputting method notification D3 at the timing of outputting start instruction D2, it outputs start instruction D2 after the output of method notification D3 is completed.

[0081] This configuration prevents the start instruction D2 from being output while the method notification D3 is being output. Furthermore, since the rescuer hears the chest compression start instruction D2 after hearing the method of chest compressions, they can start chest compressions smoothly even if they are unfamiliar with the method.

[0082] Although embodiments of this disclosure have been described above, the technical scope of this application should not be interpreted as being limited by the description of these embodiments. These embodiments are examples, and it will be understood by those skilled in the art that various modifications of the embodiments are possible within the scope of the invention described in the claims. The technical scope of this application should be determined based on the scope of the invention described in the claims and the scope of its equivalents. [Explanation of Symbols]

[0083] 1: AED (Automated External Defibrillator), 10: AED main unit, 11: Battery pack, 11A: Battery cell, 12: Cover, 13: Cable, 14, 15: Electrode pads, 101: Sound output unit, 103: Control unit, 104: Memory unit, 105: High-voltage unit, 106: Electrocardiogram analysis unit, 131: Output control unit, 132: Electrode pad control unit, 133: Power supply control unit, 134: Detection unit

Claims

1. An automated external defibrillator that performs electrocardiogram analysis and discharge processing on a subject, During the cardiopulmonary resuscitation period following the electrocardiogram analysis and the discharge process, a detection unit detects the body movements of the subject, The system includes an output control unit that outputs instructions to the rescuer regarding chest compressions based on whether or not the subject moves during the cardiopulmonary resuscitation period, The output control unit, It outputs a continue command instructing the continuation of chest compressions, and outputs the continue command again when a first time has elapsed since the previous output of the said continue command. An automated external defibrillator that, if no body movement of the subject is detected for a period of time shorter than the first period, outputs a start command to initiate chest compressions, prioritizing this command over a continuation command, and outputs the start command again when the second period has elapsed since the previous output of the start command.

2. The automated external defibrillator according to claim 1, wherein the output control unit outputs a method notification to the rescuer to inform them of the method of chest compressions if no body movement of the subject is detected during the cardiopulmonary resuscitation period until the timing of the output of the initial start instruction.

3. The output control unit, Before the start of the cardiopulmonary resuscitation period, guidance regarding cardiopulmonary resuscitation for the subject is output. An automated external defibrillator according to claim 1 or 2, wherein the timing for determining the output timing of the initial continue instruction and the initial start instruction during the cardiopulmonary resuscitation period starts from the output timing of the guidance.

4. The automated external defibrillator according to claim 1 or 2, wherein the output control unit outputs the one instruction after the output of the other instruction is completed, if the other instruction is being output at the output timing of one of the two instructions, the one instruction.

5. The automated external defibrillator according to claim 4, wherein the output control unit outputs the one instruction after a predetermined time has elapsed after the output of the other instruction is completed.

6. The output control unit, If the start instruction is being output at the timing of the output of the continue instruction, the continue instruction will be output after the output of the start instruction is completed. An automated external defibrillator according to claim 1 or 2, wherein if the continuation instruction is being output at the timing of the output of the start instruction, the output of the continuation instruction is interrupted and the start instruction is output.

7. The automated external defibrillator according to claim 2, wherein, if the output control unit is outputting the method notification at the timing of outputting the start instruction, it outputs the start instruction after the output of the method notification is completed.

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