JP6620210B2 - Nurse call system - Google Patents

Description

  The present invention relates to a nurse call system that includes a camera that images a patient on a bed and has a function of checking a patient's condition.

When the patient on the bed tries to get up or gets out of bed, there is a danger of falling from the bed or falling. In addition, dementia patients are worried and must be dealt with early.
Therefore, by installing a camera that images the patient on the bed and providing a function to detect and notify the patient's bed from the captured image, the nurse can be dangerous to the patient without watching the patient on the image. There is a nurse call system that can reduce the burden on nurses by receiving notification when a situation occurs.
For example, in Patent Document 1, a patient placed on a bed is imaged by a camera installed above the bed, and the patient's rising and getting out of the bed are detected by video analysis.

JP 2014-90913 A

  The technique of the above-mentioned patent document 1 is a configuration that can be implemented at a low cost without the need to install a special device for detecting getting out of bed because the patient's state is determined by analyzing the captured image of the camera. However, an operation in which a person other than the patient leaves the bed may also be judged as getting out of bed, and erroneous reports are likely to occur.

  In view of the above problems, an object of the present invention is to provide a nurse call system that can detect a patient's bed leaving operation with high accuracy based on a captured image of a camera.

In order to solve the above-described problems, the invention of claim 1 is directed to a nurse call slave unit for a patient to call a nurse, a nurse call master unit for responding to a call by the nurse call slave unit, and a nurse call slave unit. In a nurse call system having a controller that controls communication between a master and a nurse call master unit and a camera that images a patient on the bed, on the bed, lying on the bed based on the image captured by the camera It has a video analysis unit that detects the rising state where the upper body is raised and the bed leaving state where it is no longer in bed, and the video analysis unit fits within the angle of view of the camera according to the bed to be imaged to determine getting out of bed. A specific area has been set up, detect the state of lying on the bed, detect the rising state from that state, and then move a person who moves out of the specific area within a predetermined time Determines that lifting occurs Once out, nurse call base unit, characterized in that notification operation receives the determination of the lifting generation of the video analysis unit.
According to this configuration, it is assumed that the rising motion is detected from a state where the judgment of getting out of bed is lying down. Can be reduced. And, since a person who moves outside from a specific area formed so as to surround the bed is detected, it is determined that he / she is getting out of bed, so that it is possible to eliminate erroneous detection that determines that the movement is out of the angle of view of the camera from near the bed as getting out of bed . In addition, since the nurse call parent machine can recognize the occurrence of getting out of bed, the nurse is easy to deal with.

According to a second aspect of the present invention, in the configuration according to the first aspect, the nurse call master unit has a display for displaying a list of patient information, and upon detection of a rising state by the video analysis unit, It has a display control part which lights or blinks the patient information display area of the corresponding patient of the patient information list currently displayed.
According to this configuration, when a state in which the patient has risen is detected, the nurse call parent device performs a notification operation of the corresponding patient information display area, so that the nurse can be alerted.

  According to the present invention, since it is premised on detection of a rising motion from a state where the determination of getting out of bed is lying down, for example, it is possible to prevent erroneous detection in which a state in which a spectator is sitting on a bed is determined to be a rising motion and to ensure erroneous detection. Can be reduced. And, since a person who moves outside from a specific area formed so as to surround the bed is detected, it is determined that he / she is getting out of bed, so that it is possible to eliminate a false detection of determining that a person moves out of the angle of view of the camera from near the bed as getting out of bed. . In addition, since the nurse call parent machine can recognize the occurrence of getting out of bed, the nurse is easy to deal with.

It is a block diagram which shows an example of the nurse call system which concerns on this invention. It is a circuit block diagram of a corridor lamp. It is a circuit block diagram of a nurse call parent machine. It is explanatory drawing which shows a camera position. It is explanatory drawing of a camera picked-up image. It is display explanatory drawing of the nurse call main machine which alert | reports rising detection.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of a nurse call system according to the present invention. 1 is a nurse call slave set installed for each bed for a patient to call a nurse, and 2 is a call set installed in front of a hospital room. Corridor lamp for notifying the occurrence and displaying patient information in the hospital room, 3 is a nurse call master unit for informing and responding to a call from the patient at the nurse station, 4 is a nurse carrying the call from the patient A mobile terminal such as a smartphone for responding, 5 is a base station such as an access point that communicates with the mobile terminal 4, 6 is an exchange that manages communication via the base station 5, 7 is a controller that controls call / call, Reference numeral 8 denotes a camera for imaging the patient.
The corridor lamp 2, the nurse call master unit 3, and the exchange 6 are connected to the controller 7 via the LAN line L1, the nurse call slave unit 1 is connected to the corridor lamp 2 via the transmission line L2, and the camera 8 is transmitted to the corridor lamp 2. They are connected via a line L3.

  The nurse call handset 1 includes a call button 1a and a plate handset 1b provided with a call section 11 for calling with a nurse and a connection jack 12 for connecting the call button 1a.

  The corridor lamp 2 includes a display lamp 21 for flashing light emission when a patient in the hospital room operates the nurse call cordless handset 1 to generate a call, and a patient information display section 22 for displaying the name of the patient in the hospital room. Have. 2 includes a circuit shown in the circuit block diagram of FIG. 2, an image analysis unit 23 that analyzes the captured image of the connected camera 8, a corridor lamp CPU 24 that controls the corridor lamp 2, a controller 7, a camera 8, and a nurse call. A corridor lamp IF 25 and the like communicating with the slave unit 1 are provided.

  The nurse call parent device 3 includes a handset 31 as a communication unit for responding to a call, a first display 32 for displaying a list of patient information and a ward map, a second display for displaying caller information and the like smaller than the first display 32. A display 33 is provided. 3 includes a circuit shown in the circuit block diagram of FIG. 3, a display control unit 34 for controlling the display of the displays 32 and 33, an operation unit 35 including a touch panel assembled to the first display 32, and various types of information such as patient information. An information storage unit 36 that stores information, a voice processing unit 37 that controls a call, a base unit CPU 38 that controls the nurse call base unit 3, a base unit IF 39 that communicates with the control unit 7, and the like are provided.

  The operation of the nurse call system configured as described above is as follows. However, with regard to the operation that enables a call between the responding device and the nurse call slave unit 1 by ringing the nurse call master unit 3 and the portable terminal 4 by the calling operation of the nurse call slave unit 1 Since it is the same as that of the prior art, the description thereof will be omitted, and here, an explanation will be made focusing on the operation of discriminating the state of the patient from the captured image of the camera 8.

The camera 8 has a patient to be watched as an imaging target, and basically always images. FIG. 4 is an explanatory diagram showing the installation state of the camera, and is installed so as to image the entire bed B from above the head of the patient M. FIG. 5 shows an image captured by the camera 8 and shows an image of the patient standing up.
Thus, the image | video which imaged the whole bed with the camera 8 is transmitted to the image | video analysis part 23 of the corridor lamp 2, and a patient's motion is analyzed and judged. Specifically, the state of lying on the bed, the state of getting up with the upper body raised, and the state of getting out of the bed are detected. These states can be detected by a known video analysis, for example, by a known image analysis technique based on SIFT (Scale Invariant Feature Transform) or SURF (Speeded-Up Robust Features) techniques.

  The video analysis unit 23 first recognizes by analyzing the video sent from the camera 8 that the patient is lying on the bed, that is, the supine position or the lateral position. This state is determined from the position of the patient's head, for example. In the next detection of the rising motion, when the state where the patient wakes up from the state of lying on the bed is detected, it is determined that the rising motion has occurred. Then, after detecting the rising motion, if a person moves outward from the bed (outside a specific area to be described later), it is determined that a bed has occurred.

  The determination of getting out of bed will be specifically described. A plurality of lines are drawn within the angle of view of the camera, which is the imaging area of the camera 8, and when the patient goes out of the area (specific area) surrounded by the lines, it is detected that the person is getting out of bed. In FIG. 5, two lines T1 and T2 that are parallel in the vertical direction are drawn, and it is set to determine that the person is getting out of bed when the person moves to either the left or right side from the specific area E between the two lines T1 and T2. Yes.

  Note that the lines T1 and T2 are set according to the width of the bed to be imaged, and are set so as to be determined to be out of bed when a person comes out of the bed. The positions of the lines T1 and T2 are set based on the captured image of the camera 8 that is actually installed, and are stored in the video analysis unit 23. In addition, in the case of a bed that can move in the front-rear direction from the bed, it is preferable to set a specific area by setting a line in the vertical direction and surrounding the bed.

  Here, the determination of the elapsed time from the detection of the rising motion until reaching the bed is described. When rising is detected, a flag is raised and a person who comes out of the line is recognized while the flag is maintained, but it is determined that the person is getting out of bed. The length of time for maintaining this flag is about 3 to 60 minutes. It is set with a range. If the movement of the person going out of the specific area E is detected while this flag is set, it is determined that the patient has left the floor.

There are various movements when getting out of bed for each patient, and the reason why the width is set for the predetermined time in this way is that the getting out of the bed is not always accompanied by a rising motion. Further, if the rising operation is ignored, it is possible to detect falling from the bed in addition to getting out of bed, so that a new effect can be obtained if the predetermined time is set longer.
Therefore, based on such an effect, the predetermined time for maintaining the flag is not particularly set, and once the rising state is detected, the flag may be maintained for several hours or until a movement out of the specific area E is detected.
As a result, once the rising state is detected, it is determined that there is a patient lying on the bed, and then it is determined that the person is out of bed if the movement of the person outside the specific area E is detected without detecting the rising operation. The fall of the patient from the bed can also be detected as getting out of bed, and the fall can be detected without installing a separate fall detection mat.

  It should be noted that the rising detection flag is deleted when bed leaving is detected or when a predetermined time has elapsed. When the rising flag is erased, if the rising is not detected after that, even if the movement of the person from the inside of the specific area E is detected, it is not determined to be out of bed.

In this way, when a rising motion is detected, a rising detection signal is transmitted to the nurse call parent device 3 under the control of the corridor lamp CPU 24. Further, when a bed leaving operation is detected thereafter, a bed leaving detection signal is transmitted to the nurse call parent device 3.
The rising detection signal and the bed leaving detection signal sent from the corridor lamp 2 are transmitted to the nurse call parent device 3 via the controller 7. The nurse call master device 3 that has received this signal performs a notification operation by displaying the occurrence of getting up or the occurrence of getting out of bed under the control of the master device CPU 38.

FIG. 6 is an explanatory diagram showing the display of the nurse call parent device 3 when the rising detection signal is received, and shows the display of the first display 32. In FIG. 6, P1 is a ward layout map, P2 is a patient room and a patient information display area, and patient information D1 such as a patient name is displayed in this hospital room P2.
Then, P3 indicates a patient that is picked up by the camera 8 that has detected rising, and indicates a state in which the patient is highlighted by a blinking operation or the like. The ward layout map P1 is displayed during standby, and the master CPU 38 that has received the rising detection signal highlights the corresponding ward P2 on the display. The bed that is captured by the camera 8 is set in the nurse call parent device 3 and stored together with the patient information.

  Note that both the rising detection signal and the leaving detection signal may be calling signals. By generating and sending a call signal, for patients who need special attention, the nurse can confirm the call by calling and receiving a ringing tone as needed, so that prompt action can be taken. .

  The corridor lamp CPU 24 transmits the captured image of the camera 8 in accordance with the transmission of the rising detection signal. The master CPU 38 that has received this video signal displays the received video image of the camera 8 on the first display 32. P4 in FIG. 6 shows a state in which an image is displayed in this way. In addition, also when the bed leaving detection signal is received, the captured image of the camera 8 is similarly displayed.

  Further, the base unit CPU 38 transmits the received rising detection signal and bed leaving detection signal to the portable terminal 4 carried by the nurse via the controller 7 and the exchange 6.

As described above, in order to determine that the person is moving out of the specific area E formed so as to surround the bed on the premise of detection of the rising motion from the state where the determination of leaving the floor is lying down, for example, a visitor It is possible to prevent false detection of a person sitting up in a bed and determining that it is a rising motion, and to reliably reduce false detection. Since the nurse call parent device 3 can recognize the occurrence of getting out of bed, the nurse is easy to deal with.
In addition, when the patient call up state is detected, the nurse call parent device 3 performs a notification operation for the corresponding patient information display area P2, so that the nurse can be alerted.

In the above embodiment, the bed leaving is determined on the premise of the two-stage operation of lying down on the bed and the rising action, but it is possible to detect the bed leaving few malfunctions without assuming the state lying down on the bed. In addition, even if it is assumed that the rising state on the bed is detected, even if a visitor moves outside, it is possible to prevent the operation from being determined as getting out of the bed, and the false detection can be further reduced.
Furthermore, even if it is determined that the user has left the floor only by detecting the movement outside the specified area without the preconditions, erroneous detection that determines that the movement is out of the angle of view of the camera 8 from near the bed is determined to be a floor. Therefore, a determination with few malfunctions is possible.
In addition, the precondition of getting out of bed may be only detection of the state of lying down on the bed, and when a person moving out of the specific area E is detected from that state, it is determined that the person has left the bed, thereby recognizing the state where the patient got up. Even if it is not, the fall of the patient from the bed can be detected by determining that he / she is getting out of bed, and the fall can be detected without installing a separate fall detection mat.
Further, although the camera 8 is connected to the hall light 2 and the video analysis unit 23 is provided in the hall light 2, the camera 8 may be directly connected to the LAN line L1, or the video analysis unit 23 is connected to the interior of the camera 8. May be provided.

  1 ・ ・ Nurse call cordless handset, 2 ・ ・ Corridor light, 3 ・ ・ Nurse call master device, 4 ・ ・ Mobile terminal, 7 ・ ・ Control device, 8 ・ ・ Camera, 23 ・ ・ Video analysis unit, 24 ・ ・ Corridor Lamp CPU, 32 .. First display (display), 33 .. Second display, 38 .. Master CPU (display control unit), E .. Specific area, P2 .... Patient information display area.

Claims (2)

A nurse call slave for a patient to call a nurse, a nurse call master for responding to a call by the nurse call slave, and communication between the nurse call slave and the nurse call master And a nurse call system having a controller for imaging and a camera for imaging a patient on a bed,
Based on the image captured by the camera, it has a video analysis unit that detects the state of lying on the bed, the rising state of raising the upper body on the bed, and the state of getting out of bed.
In the video analysis unit, a specific area is set in the angle of view of the camera in accordance with the bed to be imaged for determining getting out of bed,
Detecting the state of lying on the bed, detecting the rising state from that state, and then determining that a person has moved out of the specific area within a predetermined time is determined to be out of bed,
The nurse call system is characterized in that the nurse call base unit performs a notification operation in response to the determination of the occurrence of getting out of bed by the video analysis unit. The nurse call master has a display for displaying a list of patient information,
The display control part which lights up or blinks the patient information display area of the corresponding patient of the patient information list currently displayed on the said display in response to the detection of the rising state by the said video analysis part. The nurse call system described.

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