JPH08150125A - In-sickroom patient monitoring device - Google Patents

Abstract

PURPOSE: To remove the need of a watcher seeing the image of a sickroom at all times and secure the privacy of patient and at the same time realize the concentrated watching of plural patients by making constitution in which the position and posture state of patients are recognized automatically by means of operation using only spot coordinates in an image. CONSTITUTION: An image taking-in means that projects spot light divided into latticelike patterns and conducts the image pickup of it is equipped, and on the basis of a spot light image taken in at every image pickup cycle, individual spot coordinates data are calculated by means of a latest spot coordinates data calculating means 2. These coordinates data are memorized at any of first and second reference coordinates data memorizing means 7, 5 and a front spot coordinates data memorizing means 3, and at patent state recognizing means 9, the positions of patients in a sickroom are specified while the outcome of a patient position recognizing means 6 is being corrected by means of the outcome of a movement object recognizing means 4, and by using the outcome of a patient posture recognizing means 8, postures such as (to stand up), (to sit), (to fall) are decided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a patient monitor for a patient in a patient's room using a pattern projector and a laser for generating a spot beam in a grid pattern, and more particularly to the presence / absence, position and position of the patient in the patient's room. The present invention relates to an in-patient patient monitoring device which recognizes a posture state such as whether a person is standing or falling down at high speed and accurately, automatically detects occurrence of an abnormal state of a patient, and promptly issues an alarm to a nurse.

[0002]

2. Description of the Related Art Conventionally, nursing of a patient has been carried out by a nurse in a hospital, or a family member or a friend of the patient who accompanies the patient. However, hospital nurses and patients' families
There was a time when the patient wasn't being cared for at all by a friend, because a friend couldn't care for the patient all the time, 24 hours a day. Especially at night, the number of nurses in the hospital was insufficient, so nursing was lacking.

On the other hand, among patients with psychosis and senile dementia, there are patients who cannot take their eyes off even at one time because they behave unpredictably in healthy people. In addition, the patient immediately after the operation sometimes gets up from the bed and wanders despite the absolute rest due to the influence of anesthesia and the feeling of anxiety, and in this case as well, he cannot keep his eyes. To monitor the patient's condition even if the nurse is not present at the patient's side, and to automatically notify the nurse if an abnormality occurs,
A patient room monitoring device using a fiber grating and a laser has also been proposed (JP-A-5-161613).

[0004]

However, in the technique disclosed in the above-mentioned Japanese Patent Laid-Open No. 5-161613, the movement of the patient can be detected and an alarm can be issued.
The problems encountered when used in an actual hospital room environment have not been solved as described below. That is, there are movable objects such as baggage brought in by patients, chairs and drip tables, and small medical devices such as inhalers and infusion pumps in the hospital room, and in addition, nurses and doctors frequently come and go. .
Therefore, if the monitoring device cannot distinguish the human from the movable object or the human other than the patient, the monitoring device frequently causes an erroneous determination.

In addition, when the patient is on the bed, a futon is put on. The futon is thick and highly deformable, so it is not possible to distinguish between a patient on the bed or only the futon on the bed using only spot information from the still image. difficult.

The present invention solves such a problem by distinguishing a patient from a movable object other than the patient and accurately distinguishing only the patient, and reducing malfunctions in an actual environment in a hospital room to cause abnormalities. The object is to provide a device that can be monitored.

[0007]

According to the first aspect of the present invention,
A spot divided into a two-dimensional grid pattern is projected in a patient room where a moving or stationary patient, a movable object such as a small medical instrument, and a fixed object such as a bed are present, and the projected image is subjected to a predetermined cycle. An apparatus for monitoring the position / posture state of the patient by changing the coordinates of each spot by imaging with, the latest spot coordinate data calculating means for outputting the coordinates of each spot captured in the latest cycle,
Pre-spot coordinate data storage means for storing the coordinates of each spot output in the previous cycle, and first reference coordinate data storage means for storing the coordinate data of each spot in the absence of a patient and a movable object in the hospital room, Second reference coordinate data storage means for storing the coordinates of spots in a region where the patient existing in the hospital is stationary and not updated, and output of the latest spot coordinate data calculation means and previous spot coordinate data storage means. A moving object recognition means for recognizing a moving object based on the difference from the contents of the above, and a patient position recognition means for recognizing the position of the patient based on the difference between the output of the latest spot coordinate data calculation means and the contents of the second reference coordinate data storage means. ,
Patient posture recognition means for recognizing the posture of the patient based on the difference between the output of the latest spot coordinate data calculation means and the contents of the first reference coordinate data storage means, and the recognition of the moving object recognition means, the patient position recognition means, and the patient posture recognition means. It has a patient condition judging means for judging the condition of the patient based on the result, and an alarm generating means for generating an alarm when the patient continues a specific condition for a preset time or longer.

According to the second aspect of the present invention, a manual switch for forcibly interrupting the monitoring operation is provided in or near the patient's room, and the monitoring operation is forcibly performed based on a signal from the manual switch. It has a monitoring interruption means for interrupting.

[0009]

The operation of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of the configuration of the present apparatus. Based on an image of spot light captured in each image capturing cycle from an image capturing unit 1 which projects spot light divided into a grid pattern and captures the image. The latest spot coordinate data calculation means 2 calculates individual spot coordinate data (hereinafter referred to as latest spot coordinate data). The coordinate data is sent to the moving object recognizing means 4, the patient position recognizing means 6, and the patient posture recognizing means 8, respectively, and at the same time, the first reference coordinate data storing means depending on the operating status of the apparatus of the present invention and the status inside the patient room. 7, the second reference coordinate data storage means 5, and the previous spot coordinate data storage means 3 are also stored in appropriate means.

Here, the first reference coordinate data storage means 7 has the coordinates of each spot obtained by imaging the patient of the present invention immediately after the apparatus of the present invention is installed in the patient's room and no moving object. Is stored. The second reference coordinate data storage means 5 is in a state in which each spot light is determined to be most stable during monitoring by the device of the present invention, that is, the patient is stationary and there is no moving object in the patient room. The spot coordinate data (hereinafter referred to as the second reference coordinate data) of the region where the patient is not present in the spot projection image that is updated in the state is stored. Using this data, it is possible to distinguish and recognize an object brought into the patient's room or a moving object moved by the patient from the patient himself.

Further, the coordinates of each spot of the current spot projection image (hereinafter referred to as front spot coordinate data) are stored in the front spot coordinate data storage means 3 before the spot projection image is captured in the next imaging cycle. To be done.
That is, when the spot projection image is captured in the latest imaging cycle, the spot coordinate data obtained in the previous imaging cycle can be used.

The patient position recognition means 6 extracts a moving spot by taking the difference between the second reference coordinate data and the latest spot coordinate data, and recognizes the position of the patient based on the extracted moving spot. That is, since the spot coordinate data that is carried by the patient and projected onto the moving object that is moved is included in the second reference coordinate data, the moving spot detected by comparing the latest spot coordinate data and the second reference coordinate data is the patient. It depends only on the existence of. That is, only the position of the patient can be extracted and recognized. However, when the patient carries the moving object with the patient within the monitoring range, the position of the patient cannot be accurately determined only by the difference from the second reference coordinate data.

The situation will be described with reference to FIG. FIG. 2 shows spot coordinate data as the patient moves. For ease of understanding, the objects that caused the moving spots are shown in simplified form rather than the moving spots.
A patient brings baggage into an empty room and leaves the baggage at a location. Then, go to bed without moving for a certain period of time. After that, suppose a series of movements of crossing the front of the baggage and exiting the hospital room.

In such a situation, the patient has left his / her baggage, and the patient has moved to another place (see FIG. 2).
In column (3), the result obtained by the difference between the second reference coordinate data and the latest spot coordinate data is shown in FIG.
As in 3), there is a moving spot in the moving object portion carried by the patient together with the patient, and both objects are recognized at the same time. In such a situation it is not possible to distinguish between a patient and a moving object.

A moving object recognition means 4 is provided to correct the judgment result. In the means, the latest spot coordinate data calculated for each image pickup cycle is compared with the previous spot coordinate data, and the spot moved during two consecutive image pickups is detected. The detection of such a moving spot indicates that the moving object in the hospital room is displaced during two consecutive imaging cycles. That is, the moving object is the patient. On the contrary, if such a moving spot is not detected, it means that the patient in the hospital room is stationary.

Even in the situation shown in the column (3) of FIG. 2, the result of the moving object recognition means 4 (FIG. 2 (E-3)) is referred to as the result of the patient city recognition means 6 (FIG. 2 (F-3)). By using them together, it is possible to accurately determine the position of the patient. Furthermore, the moving object recognition means 4 can also distinguish whether the patient is on the bed or only the futon. Because the futon is thick and can be displaced and deformed in any way on the bed, it is difficult to distinguish between the patient on the bed and the futon alone using the images of one imaging cycle. However, the futon does not move by itself, so if there is a spot on the bed that moves between adjacent imaging cycles,
It is certain that the patient is on the bed.

The patient posture recognizing means 8 takes the difference between the first reference coordinate data and the latest spot coordinate data, and recognizes the three-dimensional information of the patient or the moving object, especially the height information, from the spot movement amount.

The results of the judgments made by the moving object recognizing means 4, the patient position recognizing means 6, and the patient posture recognizing means 8 are input to the patient state recognizing means 9, and the result of the patient position recognizing means 6 is first obtained. The position of the patient in the patient room is specified while correcting with the result of. Then, using the result of the patient posture recognition means 8, the posture of the patient, that is, "stand", "sit", "fall down", etc., is determined.

After that, the result of the patient state recognition means 9 is sent to the alarm generating section 10. In the alarm generation unit 10, the nurse sets the position and posture of the patient considered to be dangerous and the state duration before the operation of the device of the present invention, according to the condition of the patient to be monitored. ,
When the patient stays in a specific posture at a specific position for the set time or more, an alarm is automatically generated for the caregiver. By thus setting the set time until the alarm is issued, it is possible to prevent the instantaneous posture state of the patient from being erroneously determined to be abnormal. That is, even if the patient kicks to something and falls to the floor,
If you get up right away, it's not unusual. However, if the fallen state continues for a certain time or longer, it is abnormal. The device of the present invention can easily distinguish such situations.

According to the second aspect of the present invention, when the nurse or doctor enters the hospital room, the manual switch 11 is used and the monitoring can be interrupted by sending a signal to the monitoring interrupting means 12. This allows the device to operate only when there is only a patient in the room, and avoids confusing the patient with the caregiver. This interruption does not diminish the monitoring capability since the patient need not be automatically monitored by the device of the present invention while the nurse or doctor is in the hospital room.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a patient room patient monitoring apparatus of the present invention will be described below with reference to the drawings. FIG. 3 shows the device according to the invention in a hospital room 3
It is explanatory drawing which shows the state installed in 0. 33 is a nurse station. A bed 31 is installed in the hospital room 30. A sensor 34 is installed at a corner of the ceiling of the hospital room 30 at an angle that looks at the bed 31 in a bird's-eye view. Window 3 of hospital room 30
An infrared ray shielding film 37 for reducing disturbance caused by sunlight from the outside of the window, particularly light in the near infrared region, is attached to the sheet 6. This makes it possible to operate the device of the present invention not only at night, but also in the early morning or daytime when there are few nurses and nurses. The manual switch 11 is electrically connected to the sensor 34 and is installed on the wall. Inside the nurse station 33, a buzzer 35 connected to the sensor 34 by the alarm reporting means 32 is installed on the wall.

FIG. 4 is a block diagram showing the configuration of the patient room patient monitoring apparatus according to this embodiment. The sensor optical system of the image capturing means 1 includes a laser projector 101, a pattern light projector 102, an image pickup device 103, a lens 104, and an infrared transmissive band pass filter 105.
In 01, the infrared laser light emitted from the laser diode driven by the laser driving unit is collimated,
It is output as a laser beam.

Then, the laser beam passes through the pattern projecting element 102 and is divided into a spot pattern in a grid pattern. In the case of this embodiment, a fiber grating is used as the pattern projecting element. The projected spot projection image in the hospital room is imaged by the image pickup device 103, and in the case of the present embodiment, a CCD camera is used. An infrared transmission type band pass filter 105 for transmitting only the oscillation wavelength of the laser is attached between the image pickup device 103 and the lens 104, and an interference filter is used as the infrared transmission type band pass filter. Has been. The infrared transmissive band pass filter 105 blocks ambient light having a wavelength other than the reflected light from the laser projected spot.

Further, in FIG. 4, 201 is a frame memory, 202 is a spot coordinate calculating section, and 203 is a spot coordinate searching section. These constitute the latest spot coordinate data calculating means 2, and the image sensor 103 causes a frame memory. The spot projection image is captured in 201, and the coordinates of each spot are calculated by the spot coordinate calculation unit 202 from the spot projection image on the frame memory 201. The spot coordinate data imaged in a state where no patient is present in the patient room and no moving object is stored in the first reference coordinate data storage means 7, and immediately after the operation of the apparatus, the second reference coordinate data storage unit 5 is simultaneously operated.
It is also stored in 02.

Further, the first reference coordinate data can be made easier to operate by creating it by the following means. That is, 14 in FIG. 4 is a bed position input means. The first reference coordinate data stored in the first reference coordinate data storage means 7 of FIG. 4 is the position of the bed in the patient room necessary for determining the position of the patient, the boundary between the floor and the wall in front of the sensor. The position of the bed is also recorded at the same time, and the means for the nurse to input the position is the bed position input means 14
Is. With this means, the patient room image in the frame memory is directly displayed, the bed position is input by designating the four corners of the bed mat on the image, and at the same time, a line segment indicating the boundary between the floor and the wall in front of the sensor is displayed. By specifying the above two points, the position of the boundary between the floor and the wall in front of the sensor is input.

In the case of this embodiment, specifically, the bed position input means 14 is a personal computer and its monitor,
And configured with a mouse. As an input method, image data in the frame memory in the absence of a patient is displayed on the monitor, and the four corners of the bed mat are designated by using the mouse on the display. At the same time, two points on the line indicating the boundary between the floor and the wall in front of the sensor are input. Thereby, the position of the boundary between the floor and the wall in front of the sensor can be recognized. FIG. 7 schematically shows a screen display example of the bed position input means 14.

In addition, the first reference coordinate data stored in the first reference coordinate data storage means 7 of FIG. 4 is the height of the bed necessary for recognizing the posture state of the patient on the bed at the same time. It has been recorded and has a bed height estimating means 13 for estimating the bed height.

Specifically, the means uses the actual distance from the "boundary between the floor and the wall to the upper visual field limit" measured when the device is installed in advance, and uses "the upper two points of the bed-the upper part of the bed". Coordinates on the frame memory of "view limit" and "boundary of floor and wall ~
The bed height is estimated by proportionally calculating the coordinate data on the frame memory up to the "upper field limit". That is, FIG.
Where Pa is the number of pixels from the point ▲ on the boundary between the floor and the wall to the upper limit of the field of view, Pb is the number of pixels from the point x on the bed to the upper limit of the field of view, and La is from the “boundary between the floor and the wall to the upper limit of the field of view”. When the actual distance and Lb are the bed height, Pa: Pb = L
The bed height Lb is estimated from the proportional relational expression of a: (La-Lb).

In this estimation method, an accurate bed height cannot be obtained unless the upper part of the bed is placed in contact with the wall in front of the sensor, but in the case of a patient's room, the bed is placed in contact with the wall. Seems to be common. Estimating the bed height eliminates the need for the nurse to measure the height one by one, thus reducing the burden on the nurse. In addition,
For beds with a constant bed height, it is possible to directly input the bed height to the device without using the means.

The spot coordinate searching unit 203 uses the respective coordinates stored in the first reference coordinate data storage means 7 as a starting point for the spot projection image on the frame memory 201,
The spot moved from the starting point is searched, and the coordinates of the spot are obtained. The direction in which the spot moves in the spot projection image when the patient or moving object enters the patient room is the laser 1
01 and the optical arrangement of the image pickup device 103, the search is easy and fast. During the monitoring by the device of the present invention, one has to operate in a fast imaging cycle to detect the rapid movement of the patient,
It is effective to obtain the coordinates of the spot in a short time.

In FIG. 4, 301 is a front spot coordinate data storage unit, 402 is a moving object stationary determination unit, and 401 is a moving object position recognition unit. Each spot coordinate data of the spot projection image imaged in the previous imaging cycle is stored in the previous spot coordinate data storage unit 301. The moving object stillness determination unit 402 determines whether or not the patient has moved during the past one cycle by comparing the latest spot coordinate data and the contents of the previous spot coordinate data storage unit 301. Based on the comparison, the moving object position recognizing unit 401 recognizes the position to which the patient has moved.

In order to extract a moving object that moves slowly at the same time, the apparatus of this embodiment has a previous spot coordinate time series data storage unit 302, a moving object stationary determination unit 403, and a moving object position recognition unit 404, Each spot coordinate data of the spot projection image imaged in a certain period is stored in the spot coordinate time series data storage means 302.

In the case of the apparatus of this embodiment, the spot coordinate time series data storage means 302 stores spot coordinate data for the past 10 cycles. The moving object stationary determination unit 403 determines whether or not the moving object has moved in the past fixed period by comparing the latest spot coordinate data and the contents of the spot coordinate time series data storage unit 302. By the comparison, the moving object position recognizing unit 404 can recognize the position when the patient moves in a slow motion that cannot be detected by the moving object position recognizing unit 401, and overlooks the motion of a slow-moving elderly patient or the like. Can be captured without incident.

As described above, in the present embodiment, 301, 30
The front spot coordinate data storage means 3 is constructed from 2 and 4
Moving object recognition means 4 from 01, 402, 403, 404
Is configured. In FIG. 4, reference numeral 501 is a second reference coordinate data updating unit, 502 is a second reference data storage unit, and these constitute the second reference coordinate data storage unit 5. When the moving object stillness determination units 402 and 403 determine that the patient is still, the second reference coordinate data update unit 501 updates the contents of the second reference coordinate data storage unit 502. In situations where the patient is stationary,
There is no moving object in the hospital room, the spot light used for determination is the most stable, and the number of noise spot lights is extremely small, which is the optimum timing for updating the second reference coordinate data. In FIG. 4, 6 is a patient position recognition means. The patient position recognizing means compares the latest spot coordinate data with the second reference coordinate data,
The moving spot is extracted and the position of the patient is recognized.

The patient posture recognizing means 8 determines the three-dimensional position of the point where each spot is irradiated, based on the moving amount of the moving spot detected by comparing the latest spot coordinate data and the first reference coordinate data. Then, three-dimensional information of the moving object and the patient is obtained. The data of the moving object position recognizing units 401 and 404, the patient position recognizing unit 6, and the patient posture recognizing unit 8 are sent to the patient state recognizing unit 601, and the moving object recognizing unit corrects the determination result of the patient position recognizing unit 6. Using the determination results of 401 and 404, the true position of the patient is determined. After that, by combining with the result of the patient posture recognition means 8,
The posture of the patient at the position is determined.

At the same time, in the apparatus of this embodiment, the special area position storage unit 602 stores in advance the area that the patient always passes through when it goes out of the visual field of the image pickup device 103. The patient state recognition unit 601 also detects the entry of the patient into the blind spot by using the information. That is, as shown in the spot image in the hospital room in FIG. 5, a region that the patient must pass to get out of the visual field of the image pickup device 103 is assumed and stored in the special region storage unit 602 in advance. If the patient disappears from the field of view after the presence of the patient is recognized in the special area during the monitoring, it is determined that the patient has moved to the outside of the monitoring area, and the presence of the patient is not recognized in the special area. When the patient disappears from the monitoring area, it is determined that the patient has entered the blind spot (for example, under the bed) viewed from the image pickup device 103. the above,
The patient state recognition unit 9 comprises a patient state recognition unit 601 and a special area storage unit 602.

The alarm generating means 10 is composed of 701 to 703 in this embodiment. The patient state time series data storage unit 701 stores time series data of the recognition result of the patient state recognition unit 601. Alarm generation condition storage unit 7
In 02, a duration time condition for generating an alarm when a dangerous state assumed by the condition of the patient continues is stored in advance. The alarm generation unit 703 generates an alarm when the condition set in the alarm generation condition storage unit 702 is satisfied by the content of the patient state time series data storage unit 701. When an alarm occurs, a buzzer 35 installed in the nurse station 33 sounds to notify a nurse or a nurse.

Further, in the case of the present embodiment, when the alarm generating means 10 generates an alarm to the caregiver, at the same time, a signal is sent to the hospital room image switching device 15, and the hospital room image switching device 15 receives this signal. The image from the image pickup device 103 is displayed on the hospital room monitor 16 arranged near the caregiver. As a result, the nurse can quickly grasp the medical treatment required for the patient, and can promptly respond. Since the image in the hospital room is displayed only when an alarm is generated, that is, when the patient's condition is determined to be abnormal, the privacy of the patient is not violated by this device. This hospital room monitor 16 can also be used as the operation screen of this apparatus.

When performing the above-mentioned monitoring, the illuminance may be very low as in a patient room at night, and the patient's condition may not be grasped by the patient room monitor 16. Therefore, it is preferable to provide the infrared illuminating means 106, and when an alarm is generated from the alarm generating means, a signal is simultaneously sent to the infrared illuminating means 106 to turn on the illumination. Since the infrared rays are used, the patient does not notice the illumination even when the illumination is turned on and does not feel uncomfortable.

FIG. 6 shows a data processing flowchart as described above. As shown in the figure, when the monitoring is started, it is determined whether or not the patient is stationary for each of fast movement and slow movement, and the second reference coordinate data is updated (S
1), the position of the patient is confirmed (S2), the posture of the patient is confirmed (S3), and the state of the patient is confirmed (S4) based on the information to determine the presence or absence of an alarm (S).
5).

Further, in this embodiment, the nurse or the nurse turns on the manual switch 11 when entering the room, and sends a signal to the monitoring interruption means 12. The monitoring interruption means 12 stops the function of the latest spot coordinate calculation means 2 when a signal is given, stops the output of the latest spot coordinates, and forcibly interrupts the monitoring. This allows the device to operate only when there is only a patient in the room, and avoids confusing the patient with the nurse or caregiver. This interruption does not diminish the monitoring capability since the patient need not be automatically monitored by the device of the present invention while the nurse or nurse is in the room.

In this embodiment, the sensor obstacle detecting means 17 is also provided as shown in FIG. The means checks the number of pattern lights existing in the frame memory in the data example in the frame memory when the sensor obstacle shown in FIG. 8 is detected, and if the number is extremely smaller than the number in the reference data, immediately before the sensor, that is, the pattern projector. 102 or the lens 10 of the imager 103
4 Judge that there is an obstacle immediately before. In the case of the present embodiment, when the number of spot lights in the frame memory becomes 70% or less of the reference data (a) (b), the pattern projector 102
It is judged that an obstacle exists in front of the image pickup device 103, and a signal is sent to the alarm generating means 10 to generate a sensor obstacle alarm. The means outputs a similar determination result even when part of the screen becomes extremely bright due to sunlight or an incandescent lamp and the pattern light disappears and the patient monitoring becomes impossible. That is, patient monitoring is not normally performed even in this situation.

[0043]

According to the present invention, a patient can be recognized and monitored separately from other objects existing in a hospital room. In addition, since the position and posture of the patient are automatically recognized by calculation using only the coordinates of the spots in the image, it is not necessary for the supervisor to constantly view the image of the patient room, protecting the privacy of the patient and protecting multiple patients. It is also possible to perform intensive monitoring at a nurse station away from the hospital room.

Further, in the present invention, the data processing for recognizing the position and posture of the patient uses only the coordinates of the spots in the image, which is much faster than the calculation using the image directly. Is. Therefore, the movement of the patient can be completely tracked with the processing power of a personal computer.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of an apparatus of the present invention.

FIG. 2 is an example of spot coordinate data handled in the apparatus of the present invention.

FIG. 3 is an explanatory diagram showing a state in which an apparatus according to an embodiment of the present invention is installed.

FIG. 4 is a configuration block diagram of an apparatus according to the present exemplary embodiment.

FIG. 5 is an example of spot coordinate data when determining the entrance of a patient into a blind spot area.

FIG. 6 is a processing flowchart in a data processing unit in the apparatus according to the present embodiment.

FIG. 7 is a screen display example of the bed position input means in the present embodiment.

FIG. 8 is an example of data in a frame memory when a sensor obstacle occurs in this embodiment.

[Explanation of symbols]

 1 image capturing means 2 latest spot coordinate data calculating means 3 previous spot coordinate data storing means 4 moving object recognizing means 5 second reference coordinate data storing means 6 patient position recognizing means 7 first reference coordinate data storing means 8 patient posture recognizing means 9 Patient state recognition means 10 Alarm generation means 11 Manual switch 12 Monitoring interruption means 13 Bed height estimation means 14 Bed position input means 15 Hospital room video selector 16 Hospital room monitor 17 Sensor Obstacle detection means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor's seat group 3-2-307, Hisamoto, Takatsu-ku, Kawasaki City, Kanagawa Prefecture Ideal Research Institute, Inc. (72) Inventor, Koichi Hashimoto 3 Hisamoto, Takatsu-ku, Kawasaki-shi, Kanagawa Prefecture Chome 2-33-307 Ideal Research Institute of Science Co., Ltd.

Claims (2)

[Claims] 1. A spot divided into a two-dimensional grid pattern is projected on a patient room in which a moving or stationary patient, a movable object such as a small medical device, and a fixed object such as a bed are present, and the projection is performed. A device that monitors the position and posture of the patient from changes in the coordinates of each spot by capturing an image in a predetermined cycle, and outputs the coordinates of each spot captured in the latest cycle. First reference coordinate data storing a calculation means, a previous spot coordinate data storage means for storing the coordinates of each spot output in the previous cycle, and coordinate data of each spot in a state in which a patient and a movable object do not exist in the hospital room. A storage unit and a second reference coordinate data storage unit that stores the coordinates of spots in an area where the patient existing in the patient room is updated while the patient is stationary and is not stored. And a moving object recognition means for recognizing a moving object based on the difference between the output of the latest spot coordinate data calculation means and the contents of the previous spot coordinate data storage means, the output of the latest spot coordinate data calculation means and the second reference coordinate data storage means. Patient position recognition means for recognizing the position of the patient based on the difference from the contents of the above, and patient posture recognition means for recognizing the patient's posture based on the difference between the output of the latest spot coordinate data calculation means and the contents of the first reference coordinate data storage means. And a patient condition judging means for judging the patient condition based on the recognition results of the moving object recognizing means, the patient position recognizing means, and the patient posture recognizing means, and when the patient continues a specific condition for a preset time or more. An alarm generating means for generating an alarm, and a patient room patient monitoring device. 2. A manual switch for forcibly interrupting the monitoring operation and a monitoring interrupting means for forcibly interrupting the monitoring operation based on a signal from the manual switch in or near the patient's room. The patient monitoring device according to claim 1, wherein: