JP2023051149A - Nurse call system and state determination system - Google Patents

Abstract

To provide a nurse call system and state determination system, which allow for reliably preventing patients from dropping or falling from beds by detecting dangerous actions of patients, other than getting up and leaving beds.SOLUTION: A nurse call system provided herein comprises nurse call sub units, a nurse call base unit installed at a nurse station, cameras for capturing images of patients in beds from above, and a state determination unit configured to detect changes in the state of bed side guards made by patients from images captured by the cameras. The state determination unit outputs a first caution-required state occurrence signal upon detection of a change in the state of a bed side guard. The nurse call base unit comprises a notification unit configured to perform a first notification operation upon receipt of the first caution-required state occurrence signal.SELECTED DRAWING: Figure 5

Description

The present invention relates to a nurse call system and a status determination system.

When a patient or care recipient on a bed tries to get up or leaves the bed, there is a risk of falling or falling from the bed.
Therefore, in Patent Document 1, when a patient on a bed is imaged by a camera, and a state in which the patient is sitting upright or a state in which the patient is away from the bed is detected from the captured image, a nurse call parent is detected from the corridor light. A system is disclosed that outputs an alert state generation signal to a nurse call machine and displays a patient image on the display unit of the nurse call master machine.

JP 2014-090913 A JP 2017-38777 A

Madoka Inoue, Toshiyuki Yasui, Ryo Taguchi, Taizo Umezaki: "Detection of Bed Position for Automating Patient Watching Function", IEEJ C, Vol.138, No.6, pp.670-677 (2018)

Patent Document 1 discloses detecting and notifying a patient's standing-up behavior. had room for improvement.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a nurse call system and a state determination system that can reliably prevent a patient from falling out of bed by detecting dangerous behaviors other than getting up and getting out of bed.

In order to achieve the above object, the nurse call system of the present invention includes:
A nurse call system having a nurse call slave unit installed on a bed for a patient to call a nurse, and a nurse call master unit installed at a nurse station for responding to the call by the nurse call slave unit, ,
a camera for imaging the patient 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 patient from the image captured by the camera and outputs a first caution state occurrence signal;
with
The nurse call master device has a notification unit that receives the first caution state occurrence signal and performs a first notification operation.

According to the above configuration, in order to detect dangerous actions other than getting up and leaving the bed of the patient, for example, a change in the state of the bed rail is detected and notified to the nurse station, thereby more reliably preventing the patient from falling from the bed. can be prevented.

Further, in the nurse call system of the present invention,
The state change of the bed rail may include either a state in which the bed rail is separated from the bed or a state in which the patient tries to remove the bed rail.

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

With the above configuration, malfunctions can be suppressed by changing the position of the bed rail according to various situations such as the attributes of the patient and the shape of the bed.

Further, the nurse call system of the present invention is
a mobile terminal carried by the nurse to respond to a call from the nurse call slave;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
may further have

According to the above configuration, even if the nurse is not at the nurse station, the nurse can be notified of the patient's dangerous behavior, so the nurse can take appropriate measures.

Further, in the nurse call system of the present invention,
The state determination unit outputs a second caution state occurrence signal when determining from the captured image that at least one of a state in which the patient has raised the upper body and a state in which the patient has left the bed has occurred. death,
The notification unit may receive the second caution state occurrence signal and perform a second notification operation different from the first notification operation.

According to the above configuration, in addition to the act of removing the bed rail, when the patient takes an action that requires attention, by executing the notification operation, the nurse can appropriately recognize the patient's situation, It can be used for nursing work.

Further, the nurse call system of the present invention is
a mobile terminal carried by the nurse to respond to a call from the nurse call slave;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
further having
The communication control means may transmit the captured image and warning information to the portable terminal when receiving the second caution state occurrence signal.

According to the above configuration, when the patient takes an action requiring attention such as getting out of bed, warning information is sent to the nurse's mobile terminal together with the patient image, which leads to prompt response by the nurse.

Also, in order to achieve the above object, the state determination system of the present invention includes:
a camera that captures an image of a person 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 caution state occurrence signal;
a notification unit that receives the caution state occurrence signal and executes a notification operation;
Prepare.

According to the above configuration, in order to detect dangerous actions other than getting up and leaving the bed, for example, by detecting and reporting a change in the state of the bed rail, falling from the bed and overturning can be prevented more reliably. can.

According to the present invention, it is possible to provide a nurse call system and a condition determination system that can reliably prevent a patient from falling out of bed by detecting dangerous behaviors other than getting up and getting out of bed.

1 is a configuration diagram of a nurse call system according to the present invention; FIG. FIG. 2 is a schematic diagram showing the arrangement of cameras included in the nurse call system of FIG. 1; 2 is a functional block diagram of a camera included in the nurse call system of FIG. 1; FIG. FIG. 2 is a functional block diagram of a nurse call master device included in the nurse call system of FIG. 1; It is a flow chart for performing watching operation of the nurse call system in this embodiment. It is a figure which shows an example of the imaging image|video of the patient imaged by the camera. FIG. 10 is a diagram showing a state in which an image of a patient transmitted from a camera is displayed on the display unit of the nurse call master device;

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

FIG. 1 is a configuration diagram showing an example of a nurse call system 100 according to the present invention. As shown in FIG. 1, the nurse call system 100 includes a nurse call slave unit 1 installed at each bed in a hospital room, a corridor light 2 installed at the entrance/exit of each hospital room, and a nurse station. A nurse call master unit 3 and a controller 4 for controlling communication between devices are provided. The nurse call system 100 further includes a camera 5 installed for each bed, a mobile terminal 6 carried by the nurse, and an exchange 7 for managing communication of the mobile terminal 6 via a base station 8. .

A nurse call slave unit 1 is a device for a patient to call a nurse and have a call, and has a call button 1a and a plate slave unit 1b installed on the wall. The plate handset 1b has a connection section to which the call button 1a is connected, and a communication section for communicating with the nurse.

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

The nurse call master unit 3 is a device for receiving and responding to a call from a patient, and has a call unit 3a (an example of a notification unit), a display unit 3b, and a board unit 3c. The calling unit 3a has a handset and a reporting sound unit for making a call with a patient or making an in-hospital announcement. Various information is displayed on the display section 3b. The display unit 3b uses, for example, a 7-inch liquid crystal monitor, and is arranged near the call unit 3a. A list of patient information K of each patient is displayed on the board portion 3c.

Camera 5 captures an image of the patient himself and an image of the patient's surroundings.
The mobile terminal 6 is a terminal, such as a smart phone, for responding to calls from patients. The mobile terminal 6 has a display section 6a.

Corridor light 2, nurse call master unit 3, control unit 4, camera 5, etc. are connected to LAN via HUB 10, respectively. A nurse call slave unit 1 is connected to a corridor light 2 via a transmission line L1 for each patient room. Exchange 7 is connected to controller 4 via transmission line L2.

FIG. 2 is a schematic diagram showing the arrangement of the camera 5. As shown in FIG. As shown in FIG. 2, the camera 5 is installed above the bed 9, more specifically, on the wall surface above the head of the patient M who is lying on the bed 9, and is installed so as to image the patient's head. ing.

FIG. 3 shows a functional block diagram of the camera 5. As shown in FIG. As shown in FIG. 3, the camera 5 includes a camera CPU 21 that controls the camera 5, and a condition determination unit 22 that analyzes captured images and determines the condition of the patient. The camera 5 further includes a storage unit 23 for storing various information, a communication interface (communication IF) 24 for LAN connection with other nurse call equipment via the HUB 10, an imaging unit 25, an illumination unit 26, It has

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

Further, the state determination unit 22 detects changes in the state of the patient on the bed and changes in the state of the bed rail from a plurality of viewpoints based on the grasped bed area and the detected position of the bed rail. A change in the patient's condition is determined by extracting the shape of the patient based on the captured image. As an algorithm for extracting the patient's shape, for example, a known moving body detection method, SIFT (Scale Invariant Feature Transform), or SURF (Speeded-Up Robust Features). Deep Learning may be used. The state determination unit 22 may determine changes in the patient's state by detecting information related to the patient's human skeleton appearing in the image captured by the camera 5 . Specifically, the state determination unit 22 estimates the skeleton and joints of the patient 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 skeleton information.

The storage unit 23 stores learning data, set values, and the like as a database for judging the patient's condition.

The imaging unit 25 is composed of, for example, a camera module provided with a filter that also transmits infrared rays. The lighting unit 26 is composed of, for example, a light emitting element such as an infrared LED.

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

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

The touch panel 33 is attached to the display unit 3b, for example, and is configured to be able to receive operations by a nurse or the like. The touch panel 33 includes, for example, a setting unit 34 capable of setting the position of the bed rail detected by the state determination unit 22, or a setting unit capable of changing the display range of the patient image displayed on the display unit 3b. 34.

The information storage unit 35 stores information about the correspondence relationship between the nurse call slave unit 1 and the camera 5, various setting information, patient images, and the like. Specifically, the information storage unit 35 includes a correspondence table between the nurse call slave device 1 and the bed number, a correspondence table between the nurse call slave device 1 and the patient, a nurse-in-charge table, patient information such as patient name and gender, nurse call A correspondence table between the handset 1 and the camera 5, the position of the bed rail attached to the bed 9, the position of the bed rail set by the setting unit 34, and the like are stored.

The voice processing unit 37 processes voice signals that are generated by the calling unit 3a or that are input from the calling unit 3a. The notification light 38 is provided on the board portion 3c and emits light to notify the caller. Communication IF 39 is an interface for LAN connection with other nurse call equipment.

Next, the operation of the nurse call system 100 configured as described above will be described in detail with reference to FIG. It should be noted that the corridor light 2 performs a notification operation in response to the calling operation of the nurse call slave unit 1, and the operation of responding with the nurse call master unit 3 or the portable terminal 6 is the same as in the conventional art, so the description is omitted and the captured image of the patient is omitted. Based on this, the explanation will focus on the watching action of judging the patient's state change and the state change of the bed rail and watching over the patient. FIG. 5 is a flowchart for executing the watching operation in this embodiment. It should be noted that the order of each process constituting the flow chart described below is random as long as there is no contradiction or inconsistency in the contents of the process. Also, the processing executed by each device may be executed by another device as long as there is no contradiction.

As shown in FIG. 5, first, by performing a predetermined operation on the touch panel 33 of the nurse call master device 3, the start of watching operation for an arbitrary patient is set (step S10).
Upon receiving the setting of the watching operation in step S10, master device CPU 31 puts camera 5 associated with the patient for whom watching has been set into a constant imaging state, and activates state determination unit 22 (step S11).

The activated state judgment unit 22 grasps the bed area based on the learning data stored in the storage unit 23 for the video imaged by the imaging unit 25, and also determines the position of the bed rail attached to the bed. A position is detected (step S12).

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

The state determination unit 22 detects the bed area E based on the captured image C. As shown in FIG. The bed area E is two lines T1 and T2 drawn along the contour lines of the long sides of the bed 9 (both sides other than the head side and the foot side of the patient M) so as to extend in the vertical direction of the captured image C. and two lines T3 and T4 extending in the horizontal direction of the captured image C along the contour lines of the short sides of the bed 9 (both sides on the head side and foot side of the patient M). specified. A bed area E is defined as an area surrounded by these four lines T1 to T4. The positions of the lines T1 to T4 are stored in the storage unit 23. FIG. The state determination unit 22 may set the bed area E each time the watching operation is started, or use the positions of the lines T1 to T4 associated with the patient M stored in the storage unit 23. can be set. Furthermore, the settings may be made by the operation of the nurse via the setting section 34 provided on the touch panel 33 of the nurse call master device 3 .

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

Next, the state determination unit 22 determines the state of the patient M and the state of the bed rail S based on the learning data captured by the camera 5 and stored in the storage unit 23 (step S13). Specifically, the state determination unit 22 determines a state in which the patient M is lying down on the bed 9 (that is, a supine position or lateral position), a state in which the patient M is trying to remove the bed rail S, and a state in which the patient M is sitting up. , or the state in which the patient M is separated from the bed 9 (bed-leaving state). Also, the state determination unit 22 determines whether the bed rail S is removed from the bed 9 or not.

Whether the patient M is lying down on the bed 9 is determined based on, for example, the position of the patient's head in the captured image. The state determination unit 22 detects the position of the head of the patient M in FIG. It is determined that the player is lying down on 9. Further, when the patient M is in a prostrate state, the state determination unit 22 may determine whether the patient is lying on his back or lying on his armpit. The state determination unit 22 detects, for example, the direction of the head of the patient M, that is, the direction of the face (eyes, nose, mouth, etc.) of the patient M, and if the direction is facing the ceiling, the patient lies on his/her back. If the person is facing the right and left sides of the bed 9, it is determined that the person is lying on his/her side.

Whether or not the patient M is about to remove the bed rail S is determined based on, for example, the change from the state in which the patient M is lying on his/her side to the state in which the bed rail S is grasped. It should be noted that it is preferable that the occurrence of the action of grasping the bed rail S is determined when the posture is maintained for a certain period of time (for example, 5 seconds). As a result, it is possible to prevent an erroneous operation in which a normal operation such as picking up an object near the bed rail S is judged to be an attempt to remove the bed rail.

Whether the patient M is in an upright state is determined, for example, based on the state in which the patient M has changed from lying down on the bed 9 to raising the upper body. A state determination unit 22 detects the patient M and determines that the patient M has risen when the state of the patient M changes from lying down on the bed 9 to raising the upper body. It should be noted that the occurrence of this rising motion is preferably determined when the standing posture is maintained for a certain period of time (for example, 5 seconds). As a result, it is possible to prevent an erroneous operation such as, for example, judging the motion of rolling over as the motion of getting up.

Whether the patient M is out of bed is determined, for example, based on the fact that the patient M has moved out of the bed area E after performing the motion of getting up. The state determination unit 22 detects the rising motion of the patient M, and determines that the patient M has left the bed when the patient M moves out of the bed area E after the rising motion. That is, the state determination unit 22 determines whether the patient M is positioned to the left of the left line T1, to the right of the right line T2, below the lower line T3, and above the upper line T4 in the captured image C. If the person moves, it is determined that the person has left the bed.

Whether or not the bed rail S is 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 is no longer detected at the same position for a certain period of time (for example, 5 seconds). It is determined whether or not it is in a state of being removed from 9.

Next, the state determination unit 22 determines whether or not 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 or not the patient M has raised the upper body or the patient M has left the bed.

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

If it is not determined in step S15 that the specific state change of the first stage 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 specific state change of the first stage has occurred (Yes in step S15), the state determination unit 22 outputs the first caution state occurrence signal to the nurse call base unit 3 and the control unit 3. 4, and together with the captured image (patient image) of the camera 5, is transmitted to the nurse call master unit 3 (step S16).

Next, the nurse call base unit 3, which has received the first attention state occurrence signal, issues an alarm sound from the information sound unit provided in the communication unit 3a (step S17). The alarm sound may be emitted from the alarm sound unit and the notification light 38 may be illuminated to notify the occurrence of the caution state.

Next, the main unit CPU 31 of the nurse call main unit 3 reads the camera ID information included in the first attention state occurrence signal, refers to the information storage unit 35, identifies the patient who is the notification source, and identifies the patient of the identified patient. The information is displayed on the display section 3b, and the transmitted patient image is displayed on the display section 3b (step S18). Further, the nurse call master unit 3 stores the patient image data transmitted from the state determination unit 22 in the information storage unit 35 .

FIG. 7 is a diagram showing a state in which the image of the patient transmitted from the camera 5 is displayed on the display section 3b. As shown in FIG. 7, the display unit 3b includes an origin information display unit D1 that displays origin information such as a hospital room number P1, a patient name P2, and a medical department P3, and an image that displays an image of a patient. Display areas such as a display section D2 and a message display section D3 are provided. The message display section D3 displays, for example, "The first stage of dangerous behavior has occurred" to inform that the image is being displayed due to the occurrence of the caution state. Further, an operation button D4 for automatically starting recording video is arranged on the right side of the screen of the display section 3b.

Next, the controller 4, which has received the first caution state occurrence signal, refers to the information storage unit 35 of the nurse call master device 3 based on the camera ID information included in the first caution state occurrence signal. Obtain nurse information and mobile device information. The controller 4 sends the associated mobile terminal 6, that is, the mobile terminal 6 carried by the nurse in charge, a notification signal that notifies the occurrence of the caution state, source information such as the hospital room number, and the camera 5 The picked-up image is transmitted via the exchange 7 and the base station 8 (step S19).
The portable terminal 6 that has received the signal from the controller 4 displays the source information, the patient image, and the message on the display section 6a of the portable terminal 6 (not shown) in the same manner as the display of the nurse call master unit 3 .

On the other hand, in step S14, when it is determined that the second-stage specific state change has occurred (Yes in step S14), the state determination unit 22 outputs the second caution state occurrence signal to the nurse call base unit 3 and the control unit 3. 4, and together with the captured image (patient image) of the camera 5 is transmitted to the nurse call master unit 3 (step S20).

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

Next, the parent device CPU 31 of the nurse call parent device 3 reads the camera ID information included in the second caution state occurrence signal, refers to the information storage unit 35, identifies the patient who is the notification source, and identifies the patient of the identified patient. The information is displayed on the display section 3b, and the transmitted patient image is displayed on the display section 3b (step S22). The patient information includes, for example, the hospital room number, the patient's name, and the source information such as the medical department. In addition, the message displayed on the message display part D3 when the second attentional state occurrence signal is received may be different from the message displayed when the first attentional state occurrence signal is received. When the second alert state occurrence signal is received, for example, "the second stage of dangerous behavior has occurred" may be displayed. Nurse call master unit 3 also stores the patient video data transmitted from camera 5 in information storage unit 35 .

Next, the controller 4 that has received the second caution state occurrence signal refers to the information storage unit 35 of the nurse call master device 3 based on the camera ID information included in the second caution state occurrence signal, and Obtain nurse information and mobile device information. The controller 4 sends the associated mobile terminal 6, that is, the mobile terminal 6 carried by the nurse in charge, a notification signal for notifying the occurrence of a caution state, source information such as a hospital room number, and the nurse's attention. and the image captured by the camera 5 are transmitted (step S23).
The portable terminal 6 that has received the signal from the controller 4 displays the source information, the patient image, the warning information, and the message on the display section 6a of the portable terminal 6 in the same manner as the display of the nurse call master unit 3 (not shown). figure).

In the above operation example, the state in which the bed rail S is removed from the bed 9 and the state in which the patient M is about to remove the bed rail S are cited as the specific state change in the first step, and the specific state change in the second step is performed. As the state change, the state in which the patient M sits up and the state in which the patient M leaves the bed is mentioned, but it is not limited to this. For example, the state in which the bed rail S is removed from the bed 9 may be included in the second-stage specific state change. As a result, when the patient M tries to remove the bed rail S, the first caution state generation signal is output, and when the bed rail S is further removed from the bed 9, the second caution state generation signal is output. A caution state occurrence signal can be output to notify the nurse of the patient M's dangerous behavior.

As described above, the nurse call system 100 according to this embodiment includes the nurse call slave unit 1, the corridor light 2, the nurse call master unit 3 installed at the nurse station, and the patient on the bed from above the bed. and a camera 5 for imaging. The camera 5 has a state determination unit 22 that detects a change in the state of the bed rail S caused by the patient M from the captured image and outputs a first caution state generation signal. The nurse call master unit 3 has a notification unit (call unit 3a) that receives the first caution state occurrence signal and executes the first notification operation. According to this configuration, in order to detect dangerous actions other than getting up and leaving the bed of the patient M, for example, by detecting a change in the state of the bed rail S and notifying the nurse station, the fall of the patient M from the bed 9 is detected. can be prevented more reliably.

Further, in the nurse call system 100 of the present invention, the state change of the bed rail S includes either the state in which the bed rail S is separated from the bed 9 or the state in which the patient M tries 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 has a setting unit 34 capable of manually changing the detection position of the bed rail S. With this configuration, malfunction can be suppressed by changing the detection range according to various situations such as the attributes of the patient M and the shape of the bed.

In addition, the nurse call system 100 of the present invention includes a portable terminal 6 carried by a nurse to respond to a call from the nurse call handset 1, and a portable terminal 6 that receives a first attention state occurrence signal and transmits a captured image to the portable terminal 6. and communication control means (controller 4) for transmitting to. According to this configuration, even if the nurse is not at the nurse station, the patient's dangerous behavior can be notified to the nurse, so the nurse can take appropriate measures.

In addition, in the nurse call system 100 of the present invention, when the state determination unit 22 determines that at least one of the state in which the patient M is sitting up and the state in which the patient M is separated from the bed has occurred from the captured image, outputs a second attention state occurrence signal. The notification unit receives the second caution state occurrence signal and executes a second notification operation different from the first notification operation. According to this configuration, in addition to the act of removing the bed rail S, when the patient M takes an action requiring attention, by executing the notification operation, the nurse can appropriately recognize the situation of the patient M. It can be used for nursing work.

In addition, the nurse call system 100 of the present invention includes a portable terminal 6 carried by a nurse to respond to a call from the nurse call handset 1, and a portable terminal 6 that receives a first attention state occurrence signal and transmits a captured image to the portable terminal 6. and communication control means for transmitting to the portable terminal 6, the communication control means transmitting the captured image and the warning information to the portable terminal 6 when receiving the second caution state occurrence signal. According to this configuration, when the patient M takes an action that requires more attention such as getting out of bed, warning information is notified to the nurse's mobile terminal 6 together with the patient image, leading to prompt response by the nurse.

In the above embodiment, the case where the camera 5 is installed above the head of the patient lying on the bed has been described. The camera 5 may be installed above the feet of the patient M who has taken the position. By capturing the image from above the bed 9, the image captured on the bed does not change even if there is a person around the bed, so malfunction can be prevented.

Further, the patient image displayed on the image display unit D2 of the display unit 3b is not limited to one image. may be displayed on the display unit 3b.

Also, in the above embodiment, the state determination section 22 is provided in the camera 5, but the present invention is not limited to this example. A dedicated server may be configured to receive images from the camera 5 at all times, and the state determination unit 22 may be provided in the server.

Also, in the above embodiment, the operation of watching over the patient M in the nurse call system 100 has been described, but the present invention is not limited to this example. For example, the watching operation in this embodiment is to image the patient M on the bed, detect the change in the state of the bed rail S caused by the patient M from the imaged image, output a caution state generation signal, and notify a predetermined person concerned. It may be implemented as a state determination system. In this case, the state determination system can be easily configured by combining a camera, a control device (for example, a computer, etc.) having a state determination section and a notification section.

It should be noted that the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, numerical value, form, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

1: nurse call slave unit, 2: hallway light, 3: nurse call master unit, 3a: call unit (an example of the notification unit), 3b: display unit, 3c: board unit, 4: controller (an example of communication control means ), 5: camera, 6: portable terminal, 6a: display unit, 7: exchange, 8: base station, 9: bed, 21: camera CPU, 22: state determination unit, 23: storage unit, 24, 39: communication Interface (Communication IF), 31: Master 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 slave unit installed on a bed for a patient to call a nurse, and a nurse call master unit installed at a nurse station for responding to the call by the nurse call slave unit, ,
a camera for imaging the patient 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 patient from the image captured by the camera and outputs a first caution state occurrence signal;
with
A nurse call system, wherein the nurse call master device has a notification unit that receives the first caution state occurrence signal and executes a first notification operation. 2. The nurse call system according to claim 1, wherein the state change 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 tries to remove the bed rail. 3. The nurse call system according to claim 2, wherein said nurse call master unit further has a setting section capable of changing the position of said bed rail. a mobile terminal carried by the nurse to respond to a call from the nurse call slave;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
4. The nurse call system according to any one of claims 1 to 3, further comprising: The state determination unit outputs a second caution state occurrence signal when determining from the captured image that at least one of a state in which the patient has raised the upper body and a state in which the patient has left the bed has occurred. death,
The nurse call system according to any one of claims 1 to 4, wherein the notification unit receives the second caution state occurrence signal and performs a second notification operation different from the first notification operation. a mobile terminal carried by the nurse to respond to a call from the nurse call slave;
a communication control means for receiving the first attention state occurrence signal and transmitting the captured image to the mobile terminal;
further having
6. The nurse call system according to claim 5, wherein said communication control means transmits said captured image and warning information to said portable terminal when said second caution state occurrence signal is received. a camera that captures an image of a person 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 caution state occurrence signal;
a notification unit that receives the caution state occurrence signal and executes a notification operation;
A state determination system.

Images