JP7681487B2 - Nurse call system and status judgment system - Google Patents

Description

The present invention relates to a nurse call system and a condition judgment system.

When a patient or a person being cared for tries to get up or leave the bed, there is a risk of falling off the bed or tripping over.
Therefore, Patent Document 1 discloses a system in which a camera captures an image of a patient in bed, and if the captured image detects that the patient has sat up or left the bed, a warning signal is output from the corridor light to the nurse call master unit, and an image of the patient is displayed on the display unit of the nurse call master unit.

JP 2014-090913 A JP 2017-38777 A

Madoka Inoue, Toshiyuki Yasui, Ryo Taguchi, and Taizo Umezaki: "Bed position detection for automation of patient monitoring functions," Journal of Electrical Engineering C, Vol. 138, No. 6, pp. 670-677 (2018)

Patent Document 1 discloses a system that detects and notifies the patient when he or she gets up, but there are other dangerous actions besides the patient getting up or getting out of bed that can lead to a fall or tripping, so there is room for improvement in predictability of dangerous actions.

The present invention aims to provide a nurse call system and a condition assessment system that can reliably prevent a patient from falling or tipping over from a bed by detecting dangerous actions other than the patient getting up or leaving the bed.

In order to achieve the above object, the nurse call system of the present invention comprises:
A nurse call system having a nurse call handset that is installed on a bed and allows a patient to call a nurse, and a nurse call master that is installed on a nurse station and responds to calls made by the nurse call handset,
A camera that captures an image of a patient lying on a bed from above the bed;
a state determination unit that detects a change in the state of the bed rail caused by the patient from the image captured by the camera and outputs a first attention state occurrence signal;
Equipped with
The nurse call master unit has an alarm unit that receives the first attention state occurrence signal and executes a first alarm operation.

According to the above configuration, in order to detect dangerous actions other than the patient getting up or getting out of bed, for example, by detecting changes in the state of the bed rails and notifying the nurse station, it is possible to more reliably prevent the patient from falling or tipping over from the bed.

In addition, in the nurse call system of the present invention,
The change in the state of the bed rail may include either a state in which the bed rail has come off the bed or a state in which the patient is attempting to remove the bed rail.

In addition, in the nurse call system of the present invention,
The nurse call parent unit may further have a setting unit capable of changing the position of the bed rail.

The above configuration allows the position of the bed rails to be changed depending on various conditions such as the patient's attributes and bed shape, making it possible to prevent malfunctions.

In addition, the nurse call system of the present invention includes:
a mobile terminal carried by the nurse to answer a call from the nurse call handset;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
may further include:

With the above configuration, even if a nurse is not at the nurse's station, the nurse can be notified of a patient's dangerous behavior, allowing the nurse to take appropriate action.

In addition, in the nurse call system of the present invention,
when the state determination unit determines from the captured image that at least one of a state in which the patient has sat up and a state in which the patient has left the bed has occurred, the state determination unit outputs a second attention state occurrence signal;
The notification unit may receive the second attention state occurrence signal and execute a second notification action different from the first notification action.

According to the above configuration, if the patient performs an action that requires attention other than removing the bed rails, an alarm action is executed, allowing the nurse to properly recognize the patient's condition, which is useful for nursing work.

In addition, the nurse call system of the present invention includes:
a mobile terminal carried by the nurse to answer a call from the nurse call handset;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
and
The communication control means may transmit the captured image and warning information to the mobile terminal when the second attention state occurrence signal is received.

According to the above configuration, when a patient takes an action that requires attention, such as getting out of bed, warning information is sent to the nurse's mobile device along with an image of the patient, which allows the nurse to take prompt action.

In order to achieve the above object, the state determination system of the present invention comprises:
A camera that captures an image of a person lying on the bed from above the bed;
a state determination unit that detects a change in the state of the bed rail caused by the person from the image captured by the camera and outputs a warning state generation signal;
a notification unit that receives the warning state occurrence signal and executes a notification operation;
Equipped with.

According to the above configuration, in order to detect dangerous actions other than the person on the bed getting up or getting out of bed, for example, by detecting and reporting changes in the state of the bed rails, it is possible to more reliably prevent the person from falling or tipping over from the bed.

The present invention provides a nurse call system and a condition assessment system that can reliably prevent a patient from falling or tipping over from a bed by detecting dangerous actions other than the patient getting up or leaving the bed.

1 is a configuration diagram of a nurse call system according to the present invention. 2 is a schematic diagram showing the arrangement of cameras provided in the nurse call system of FIG. 1. 2 is a functional block diagram of a camera provided in the nurse call system of FIG. 1. 2 is a functional block diagram of a nurse call master unit provided in the nurse call system of FIG. 1. 13 is a flowchart for executing the monitoring operation of the nurse call system in this embodiment. FIG. 2 is a diagram showing an example of an image of a patient captured by a camera. A figure showing the state in which an image of a patient transmitted from a camera is displayed on the display unit of a nurse call parent unit.

The nurse call system according to the present invention will be described below with reference to the drawings.

Figure 1 is a configuration diagram showing an example of a nurse call system 100 according to the present invention. As shown in Figure 1, the nurse call system 100 includes a nurse call handset 1 installed for each bed in a hospital room, a corridor light 2 installed at the entrance and exit of each hospital room, a nurse call master unit 3 installed at a nurse's station, and a controller 4 that controls communication between the devices. The nurse call system 100 further includes a camera 5 installed for each bed, a mobile terminal 6 carried by a nurse, and a switchboard 7 that manages communication of the mobile terminal 6 via a base station 8.

The nurse call handset 1 is a device that allows a patient to call a nurse and speak to her, and has a call button 1a and a plate handset 1b that is installed on the wall. The plate handset 1b has a connection part to which the call button 1a is connected, and a communication part for speaking to a nurse.

The corridor light 2 is a device for notifying the patient of a call, and has an indicator light 2a and a patient name display section 2b.

The nurse call master unit 3 is a device for receiving and responding to calls from patients, and has a conversation unit 3a (an example of an alarm unit), a display unit 3b, and a board unit 3c. The conversation unit 3a has a handset and an alarm unit for talking to patients and making in-hospital announcements. Various information is displayed on the display unit 3b. The display unit 3b is, for example, a 7-inch liquid crystal monitor, and is located near the conversation unit 3a. The board unit 3c displays a list of patient information K for each patient.

The camera 5 captures images of the patient himself/herself and surrounding images related to the patient.
The mobile terminal 6 is a terminal for responding to a call from a patient, such as a smartphone, etc. The mobile terminal 6 has a display unit 6a.

The corridor light 2, nurse call master 3, controller 4, camera 5, etc. are all connected to the LAN via HUB 10. The nurse call slave 1 is connected to the corridor light 2 via transmission line L1 for each patient room. The switchboard 7 is connected to the controller 4 via transmission line L2.

Figure 2 is a schematic diagram showing the placement of camera 5. As shown in Figure 2, camera 5 is installed above bed 9, more specifically, on the wall above the head of patient M lying face down on bed 9, and is set up so as to capture an image centered on the patient's head.

Figure 3 shows a functional block diagram of the camera 5. As shown in Figure 3, the camera 5 includes a camera CPU 21 that controls the camera 5, and a state determination unit 22 that analyzes the captured image and determines the state of the patient. The camera 5 further includes a memory unit 23 that stores various information, a communication interface (communication IF) 24 for connecting to other nurse call devices via a LAN via the HUB 10, an imaging unit 25, and an illumination unit 26.

The state determination unit 22 grasps the bed area from the image captured by the imaging unit 25 and detects the position of the bed rails attached to the bed. As a method for grasping the bed area, for example, the bed area grasping method disclosed in Patent Document 2 may be used, or the bed position estimation method using machine learning in Non-Patent Document 1 may be used.

The state determination unit 22 detects changes in the state of the patient on the bed and changes in the state of the bed rails from multiple perspectives based on the grasped bed area and the detected position of the bed rails. The change in the state of the patient is determined by extracting the shape of the patient based on the captured image. As an algorithm for extracting the shape of the patient, for example, a known moving object detection method, a discrimination method using features by SIFT (Scale Invariant Feature Transform) or SURF (Speed-Up Robust Features), or deep learning may be used. The state determination unit 22 may determine the change in the state of the patient by detecting information about the patient's human skeleton shown in the image captured by the camera 5. Specifically, the state determination unit 22 estimates the patient's skeleton and joints based on the captured image. As a method for estimating the skeleton and joints, for example, existing skeleton tracking technology can be used. Note that the state determination unit 22 may estimate one of the skeleton and joints of the target person as the skeleton information.

The memory unit 23 stores learning data, setting values, etc. as a database for determining the patient's condition.

The imaging unit 25 is, for example, a camera module equipped with a filter that also transmits infrared light. The illumination unit 26 is, for example, a light-emitting element such as an infrared LED.

Figure 4 shows a functional block diagram of the main parts of the nurse call master unit 3. As shown in Figure 4, in addition to a call unit 3a and a display unit 3b, the nurse call master unit 3 includes a master unit CPU 31 that controls the entire nurse call master unit 3, a video processing unit 32, a touch panel 33 as an operation unit attached to the display unit 3b, and a setting unit 34. The nurse call master unit 3 further includes an information storage unit 35, an audio processing unit 37, a notification light 38 (an example of an alarm unit), and a communication interface (communication IF) 39.

The image processing unit 32 processes the image or video to be displayed on the display unit 3b. Specifically, the image processing unit 32 processes the video of the patient M on the bed captured by the camera 5 to generate a display image to be displayed on the display unit 3b.

The touch panel 33 is attached to, for example, the display unit 3b and is configured to be able to accept operations by a nurse or the like. The touch panel 33 functions, for example, as a setting unit 34 that can set the position of the bed rails detected by the condition determination unit 22, or as a setting unit 34 that can change the display range of the patient image displayed on the display unit 3b.

The information storage unit 35 stores information about the correspondence between the nurse call handset 1 and the camera 5, various setting information, and even patient images. Specifically, the information storage unit 35 stores a correspondence table between the nurse call handset 1 and the bed number, a correspondence table between the nurse call handset 1 and the patient, a table of the nurse in charge, patient information such as the patient's name and gender, a correspondence table between the nurse call handset 1 and the camera 5, the position of the bed rails attached to the bed 9, the position of the bed rails set by the setting unit 34, etc.

The voice processing unit 37 processes the voice signal that is output by the communication unit 3a or input from the communication unit 3a. The notification light 38 is provided on the board unit 3c and notifies the caller by illuminating the caller. The communication IF 39 is an interface for connecting to other nurse call devices via LAN.

Next, the operation of the nurse call system 100 configured as described above will be described in detail with reference to FIG. 5. Note that the operation of the corridor light 2 notifying in response to a call operation of the nurse call handset 1 and the operation of responding with the nurse call master unit 3 or mobile terminal 6 are the same as in the conventional system, so the explanation will be omitted. The explanation will focus on the monitoring operation of judging changes in the patient's condition and changes in the condition of the bed rails based on the captured image of the patient and monitoring the patient. FIG. 5 is a flowchart for executing the monitoring operation in this embodiment. Note that the order of each process constituting the flowchart described below is random as long as no contradictions or inconsistencies occur in the process contents. Furthermore, the processes executed by each device may be executed by other devices as long as no contradictions occur.

As shown in FIG. 5, first, a predetermined operation on the touch panel 33 of the nurse call master unit 3 is performed to set the start of a monitoring operation for a given patient (step S10).
In response to the setting of the monitoring operation in step S10, the parent unit CPU 31 sets the camera 5 associated with the patient for whom monitoring has been set to a constant image capturing state and activates the state determination unit 22 (step S11).

The activated state determination unit 22 identifies the bed area based on the image captured by the imaging unit 25 and the learning data stored in the memory unit 23, and detects the position of the bed rails attached to the bed (step S12).

Figure 6 shows an example of an image captured by the camera 5. This image shows an image C of a patient M lying face down on a bed 9.

The state determination unit 22 detects the bed area E based on the captured image C. The bed area E is defined based on two lines T1 and T2 drawn to extend in the vertical direction of the captured image C along the contour of the long side of the bed 9 (both sides that are not the head side and foot side of the patient M) and two lines T3 and T4 drawn to extend in the horizontal direction of the captured image C along the contour of the short side of the bed 9 (both sides that are the head side and foot side of the patient M). The area surrounded by these four lines T1 to T4 is set as the bed area E. The positions of the lines T1 to T4 are stored in the memory unit 23. The state determination unit 22 may set the bed area E every time the monitoring operation is started, or may set it using the positions of the lines T1 to T4 associated with the patient M stored in the memory unit 23. Furthermore, the bed area E may be set by the nurse's operation via the setting unit 34 provided on the touch panel 33 of the nurse call master unit 3.

The state determination unit 22 detects the position of the bed rails S attached to the bed 9 based on the captured image C. In this example, the bed rails S are attached along the left and right long sides of the bed 9.

Next, the state determination unit 22 determines the state of the patient M and the state of the bed rails S based on the learning data captured by the camera 5 and stored in the memory unit 23 (step S13). Specifically, the state determination unit 22 determines whether the patient M is lying face down on the bed 9 (i.e., in a supine or lateral position), the patient M is attempting to remove the bed rails S, the patient M has sat up, or the patient M has left the bed 9 (out-of-bed state). The state determination unit 22 also determines whether the bed rails S have been removed from the bed 9.

Whether patient M is lying face down on bed 9 is determined based on, for example, the position of the patient's head in the captured image. For example, in FIG. 6, the state determination unit 22 detects the position of patient M's head, and if the position of the head is within a specified lower area in the captured image C, determines that patient M is lying face down on bed 9. If patient M is lying face down, the state determination unit 22 may determine whether the patient is lying on his/her back or lying on his/her side. For example, the state determination unit 22 detects the direction of patient M's head, i.e., the direction of patient M's face (eyes, nose, mouth, etc.), and determines that patient M is lying face down if the head is facing the ceiling, and determines that patient M is lying on his/her side if the head is facing the left or right side of bed 9.

Whether the patient M is attempting to remove the bed rails S is determined based on, for example, the patient M changing from lying on his/her side to grabbing the bed rails S. The occurrence of this action of grabbing the bed rails S is preferably determined when the patient maintains that position for a certain period of time (e.g., 5 seconds). This makes it possible to prevent erroneous actions such as judging a harmless action, such as reaching for something near the bed rails S, to be an attempt to remove the bed rails.

Whether patient M has sat up is determined based on, for example, whether patient M has changed from lying face down on bed 9 to sitting up. The state determination unit 22 detects patient M, and when the state of patient M has changed from lying face down on bed 9 to sitting up, determines that patient M has sat up. It is preferable that the occurrence of this sitting up is determined when the sat up position is maintained for a certain period of time (e.g., 5 seconds). This makes it possible to prevent erroneous operation, such as determining that a movement of rolling over is a sitting up movement.

Whether patient M has left the bed is determined based on, for example, whether patient M has sat up and then moved out of bed area E. The state determination unit 22 detects patient M's sitting up movement, and determines that patient M has left the bed if patient M has moved out of bed area E after sitting up. That is, the state determination unit 22 determines that patient M has left the bed if patient M has moved to the left of left line T1, to the right of right line T2, below lower line T3, or above upper line T4 in the captured image C.

Whether the bed rail S has been removed is determined based on the detected position of the bed rail S. The state determination unit 22 detects the position of the bed rail S attached to the bed 9, and determines whether the bed rail S has been removed from the bed 9 based on whether the bed rail S is no longer detected in the same position for a certain period of time (e.g., 5 seconds).

Next, the state determination unit 22 determines whether a second-stage specific state change has occurred in the patient M being watched over (step S14). Specifically, the state determination unit 22 determines whether the patient M has sat up or moved away from the bed.

If it is not determined in step S14 that a second-stage specific status change has occurred (No in step S14), the status determination unit 22 determines whether a first-stage specific status change has occurred in the patient M being watched over (step S15). Specifically, the status determination unit 22 determines whether a state has occurred in which the bed rails S have been removed from the bed 9, or in which the patient M has attempted to remove the bed rails S.

In step S15, when it is not determined that the first-stage specific state change has occurred (No in step S15), the state determination unit 22 returns to step S13 and repeats the processing of each step.
On the other hand, if it is determined in step S15 that a first-stage specific status change has occurred (Yes in step S15), the status determination unit 22 outputs a first attention status occurrence signal to the nurse call parent unit 3 and the control unit 4, and also transmits the image captured by the camera 5 (patient image) to the nurse call parent unit 3 (step S16).

Next, the nurse call master unit 3 that has received the first warning state occurrence signal issues an alarm sound from the alarm unit included in the communication unit 3a (step S17). In addition to issuing an alarm sound from the alarm unit, the notification light 38 may be illuminated to notify the occurrence of a warning state.

Next, the base unit CPU 31 of the nurse call base unit 3 reads the camera ID information included in the first attention state occurrence signal, identifies the patient who sent the notification by referring to the information storage unit 35, and displays the patient information of the identified patient on the display unit 3b, as well as the transmitted patient video on the display unit 3b (step S18). The nurse call base unit 3 also stores the patient video data transmitted from the state determination unit 22 in the information storage unit 35.

Figure 7 is a diagram showing the state in which the image of the patient transmitted from the camera 5 is displayed on the display unit 3b. As shown in Figure 7, the display unit 3b is provided with a source information display unit D1 that displays source information such as the hospital room number P1, the patient's name P2, and even the medical department P3, a video display unit D2 that displays the image of the patient, and a message display unit D3. The message display unit D3 may display, for example, "A first stage risky behavior has occurred," to notify the user that the image is being displayed due to the occurrence of a caution state. In addition, an operation button D4 for automatically starting recorded video is located on the right side of the screen of the display unit 3b.

Next, the control unit 4 that has received the first attention state occurrence signal references the information storage unit 35 of the nurse call master unit 3 based on the camera ID information included in the first attention state occurrence signal to obtain the associated nurse information and mobile terminal information. The control unit 4 transmits a notification signal notifying the occurrence of the attention state, together with source information such as the hospital room number, and the image captured by the camera 5, via the exchange 7 and base station 8 to the associated mobile terminal 6, i.e., the mobile terminal 6 carried by the nurse in charge (step S19).
The portable terminal 6 that receives the signal from the control unit 4 displays the call source information, patient image, and message on the display unit 6a of the portable terminal 6 in a manner similar to the display of the nurse call master unit 3 (not shown).

On the other hand, if it is determined in step S14 that a second-stage specific state change has occurred (Yes in step S14), the state determination unit 22 outputs a second attention state occurrence signal to the nurse call master unit 3 and the control unit 4, and also transmits the image captured by the camera 5 (patient image) to the nurse call master unit 3 (step S20).

Next, the nurse call master unit 3, which has received the second attention state occurrence signal, issues an alarm sound from the alarm unit of the communication unit 3a (step S21). Along with the alarm sound, the notification light 38 may be illuminated to notify the occurrence of the attention state. The alarm sound and the light color of the notification light 38 output when the second attention state occurrence signal is received may be different from the alarm sound and the light color when the first attention state occurrence signal is received.

Next, the base unit CPU 31 of the nurse call base unit 3 reads the camera ID information included in the second attention state occurrence signal, identifies the patient who sent the notification by referring to the information storage unit 35, and displays the patient information of the identified patient on the display unit 3b, as well as the transmitted patient video on the display unit 3b (step S22). The patient information includes, for example, the hospital room number, the patient name, and even the source information such as the medical department. The message displayed on the message display unit D3 when the second attention state occurrence signal is received may be different from the message displayed when the first attention state occurrence signal is received. When the second attention state occurrence signal is received, for example, it may be displayed as "Second stage risky behavior has occurred." In addition, the nurse call base unit 3 stores the patient video data transmitted from the camera 5 in the information storage unit 35.

Next, the control unit 4 that has received the second attention state occurrence signal references the information storage unit 35 of the nurse call master unit 3 based on the camera ID information included in the second attention state occurrence signal to obtain the associated nurse information and mobile terminal information. The control unit 4 transmits a notification signal notifying the occurrence of the attention state, together with source information such as the hospital room number, warning information to alert the nurse, and the image captured by the camera 5 to the associated mobile terminal 6, i.e., the mobile terminal 6 carried by the nurse in charge (step S23).
The portable terminal 6 that receives the signal from the control unit 4 displays the source information, patient image, warning information, and message on the display unit 6a of the portable terminal 6 in a manner similar to the display of the nurse call master unit 3 (not shown).

In the above operation example, the first stage specific state change includes a state in which the bed rail S has been removed from the bed 9 and a state in which the patient M is attempting to remove the bed rail S, and the second stage specific state change includes a state in which the patient M has raised his or her upper body and a state in which the patient M has left the bed, but this is not limited to the above. For example, the second stage specific state change may include a state in which the bed rail S has been removed from the bed 9. In this way, a first warning state generation signal is output when a state in which the patient M is attempting to remove the bed rail S is detected, and a second warning state generation signal is output when a further state change has occurred in which the bed rail S has been removed from the bed 9, thereby notifying the nurse of the dangerous behavior of the patient M.

As described above, the nurse call system 100 according to this embodiment includes a nurse call handset 1, a corridor light 2, a nurse call master 3 installed in a nurse's station, and a camera 5 that captures an image of a patient in bed from above the bed. The camera 5 has a state determination unit 22 that detects a change in the state of the bed rails S caused by the patient M from the captured image and outputs a first warning state generation signal. The nurse call master 3 has an alarm unit (communication unit 3a) that receives the first warning state generation signal and executes a first warning operation. With this configuration, in order to detect dangerous actions other than the patient M getting up or getting out of bed, for example, a change in the state of the bed rails S can be detected and an alarm can be sent to the nurse's station, thereby more reliably preventing the patient M from falling or tipping over from the bed 9.

In addition, in the nurse call system 100 of the present invention, a change in the state of the bed rail S includes either a state in which the bed rail S has been detached from the bed 9 or a state in which the patient M is attempting to remove the bed rail S.

In addition, in the nurse call system 100 of the present invention, the nurse call master unit 3 further includes a setting unit 34 that allows the detection position of the bed rail S to be manually changed. With this configuration, it is possible to suppress malfunctions by changing the detection range according to various conditions such as the attributes of the patient M and the shape of the bed.

The nurse call system 100 of the present invention further includes a mobile terminal 6 that the nurse carries to respond to calls from the nurse call handset 1, and a communication control means (controller 4) that receives a first caution state occurrence signal and transmits captured video to the mobile terminal 6. With this configuration, even if the nurse is not at the nurse's station, the nurse can be notified of the patient's dangerous behavior, allowing the nurse to take appropriate action.

In addition, in the nurse call system 100 of the present invention, the state determination unit 22 outputs a second attention state occurrence signal when it determines from the captured image that at least one of the following has occurred: the patient M has raised his/her upper body or the patient M has left the bed. The notification unit receives the second attention state occurrence signal and executes a second notification action different from the first notification action. With this configuration, by executing the notification action when the patient M performs an action that requires attention other than removing the bed rails S, the nurse can be made appropriately aware of the patient M's condition, which can be useful in nursing work.

The nurse call system 100 of the present invention further includes a portable terminal 6 carried by the nurse to respond to calls from the nurse call handset 1, and a communication control means for transmitting captured video to the portable terminal 6 upon receiving a first attention state occurrence signal, and the communication control means transmits the captured video and warning information to the portable terminal 6 upon receiving a second attention state occurrence signal. With this configuration, when patient M takes an action that requires more attention, such as getting out of bed, warning information is sent along with the patient video to the nurse's portable terminal 6, which allows the nurse to respond quickly.

In the above embodiment, the camera 5 is installed above the head of the patient lying face down on the bed, but the mounting position of the camera 5 may be any position above the bed, for example, the camera 5 may be installed above the feet of the patient M lying face down on the bed 9. By capturing an image from above the bed 9, the captured image of the bed does not change even if there is a person around the bed, so malfunctions can be prevented.

In addition, the patient image displayed on the image display section D2 of the display section 3b is not limited to one image, and when overlapping attention state occurrence signals are transmitted from multiple cameras 5, multiple corresponding images may be displayed on the display section 3b.

In addition, in the above embodiment, the status determination unit 22 is provided in the camera 5, but this is not limited to the example. A dedicated server may be configured to constantly receive video from the camera 5, and the status determination unit 22 may be provided in the server.

In addition, in the above embodiment, the monitoring operation of the patient M in the nurse call system 100 is described, but is not limited to this example. For example, the monitoring operation in this embodiment may be realized as a status determination system that captures an image of the patient M on the bed, detects a change in the state of the bed rail S caused by the patient M from the captured image, outputs a warning status generation signal, and notifies predetermined relevant parties. In this case, the status determination system can be easily configured by combining a camera with a control device (e.g., a computer) equipped with a status determination unit and an alarm unit.

The present invention is not limited to the above-described embodiment, and can be modified, improved, etc. as appropriate. In addition, the material, shape, dimensions, values, form, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as they can achieve the present invention.

1: Nurse call handset, 2: Corridor light, 3: Nurse call parent unit, 3a: Communication unit (an example of an alarm unit), 3b: Display unit, 3c: Board unit, 4: Controller (an example of a communication control means), 5: Camera, 6: Mobile terminal, 6a: Display unit, 7: Switchboard, 8: Base station, 9: Bed, 21: Camera CPU, 22: Status determination unit, 23: Storage unit, 24, 39: Communication interface (communication IF), 31: Parent unit CPU, 32: Video processing unit, 33: Touch panel, 34: Setting unit, 35: Information storage unit, 37: Audio processing unit, 38: Notification light, 100: Nurse call system, E: Bed area

Claims (7)

A nurse call system having a nurse call handset that is installed on a bed and allows a patient to call a nurse, and a nurse call master that is installed on a nurse station and responds to calls made by the nurse call handset,
A camera that captures an image of a patient lying on a bed from above the bed;
a state determination unit that detects a change in the state of the bed rail caused by the patient from the image captured by the camera and outputs a first attention state occurrence signal;
Equipped with
The nurse call system includes a notification unit that receives the first attention state occurrence signal and executes a first notification operation. The nurse call system of claim 1, wherein the change in the state of the bed rail includes either a state in which the bed rail is detached from the bed or a state in which the patient is attempting to detach the bed rail. The nurse call system according to claim 2, wherein the nurse call master unit further has a setting unit that can change the position of the bed rail. a mobile terminal carried by the nurse to answer a call from the nurse call handset;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
The nurse call system according to claim 1 , further comprising: when the state determination unit determines from the captured image that at least one of a state in which the patient has sat up and a state in which the patient has left the bed has occurred, the state determination unit outputs a second attention state occurrence signal;
The nurse call system according to claim 1 , wherein the notification unit receives the second attention state occurrence signal and executes a second notification action different from the first notification action. a mobile terminal carried by the nurse to answer a call from the nurse call handset;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
and
The nurse call system according to claim 5 , wherein the communication control means transmits the captured image and warning information to the mobile terminal when the second attention state occurrence signal is received. A camera that captures an image of a person lying on the bed from above the bed;
a state determination unit that detects a change in the state of the bed rail caused by the person from the image captured by the camera and outputs a warning state generation signal;
a notification unit that receives the warning state occurrence signal and executes a notification operation;
A state determination system comprising:

Images