KR102384211B1 - System and method for monitoring of patient using sensor - Google Patents

Abstract

A patient monitoring system and method using a sensor are disclosed. A patient monitoring system according to an embodiment of the present invention includes a first sensor unit that detects a temperature in a sensing area of a hospital room and outputs temperature data, a second sensor unit that detects and outputs a reflected signal of the hospital room, and the temperature data or a determination unit that determines the motion and respiration of the patient located in the hospital room based on at least one of the reflected signals, and analyzes the current state of the patient according to the determination result, wherein the sensing area comprises: a bed and a bed in the hospital room; By configuring the peripheral area of the bed to include a plurality of unit areas partitioned into multiple units, the patient's condition can be determined by comprehensively analyzing the temperature and signal changes in the hospital room, so the reliability and accuracy of real-time patient monitoring inside the hospital room can increase

Description

System and method for monitoring of patient using sensor

The present invention relates to a patient monitoring system using a sensor, and more particularly, it is possible to increase the reliability of real-time patient monitoring by accurately determining the patient's condition such as a fall or respiratory abnormality by integrating and analyzing signals detected from heterogeneous sensors. It relates to a patient monitoring system and method therefor.

The low fertility and aging problems in Korea will emerge as various social problems in the future, and the national medical welfare budget is expected to act as a heavy burden on the government.

Among the accidents that the elderly can experience, a fall accident is an accident that falls regardless of one's will, and it is a dangerous accident that can cause various complications and even death. Accordingly, various products have been devised in order to perform a prompt response to such a fall accident of the elderly.

Among them, the most widespread in the prior art is a mat-type fall and wander detection device. The mat-type fall and wander detection device is the most widely spread among fall prevention devices that are currently distributed in hospital rooms or nursing hospitals where integrated nursing care services are provided. It has a mechanism to trigger a fall alarm at the nursing station if the mat's contacts drop as the patient gets up or moves out of bed.

However, there is a problem in that an alarm is generated even if the patient simply stands up or steps on it, and accordingly, it causes stress to a nurse or a caregiver, and rather aggravates the patient care work.

In order to solve such a problem, a fall prevention device through a general camera has recently been developed and distributed. The fall prevention device using such a camera uses a method of warning of a fall or wandering using a small camera and a motion detection sensor (Doppler sensor).

In other words, when the conventional fall prevention device detects the movement of a patient in a state in which a camera and a motion detection sensor are installed in each bed, an alarm is generated to the nursing station and an image is transmitted to a nurse or a caregiver. In the case of an emergency, the patient checks the patient's condition through the screen, and the patient is dispatched to the scene.

Although such a conventional fall prevention device provides a function of inputting various alarm conditions through a computer program, the sensor operates even with every movement of the patient to generate an alarm condition, so the frequency of alarm occurrence is rather higher. There is a problem with rising.

In other words, the simple daily activities of the patient in bed, the approach of a nurse, the movement of the guardian beside the bed, and the movement of all people, such as simple tossing and turning at bedtime, can be triggered as an alarm, so it is rarely used during the day when human movement is active. This impossible situation is emerging.

Therefore, in most hospitals or nursing homes using the conventional fall prevention device, the operation itself is kept turned off during the day through the schedule function built into the program, and is operated only during the late night time.

In addition, since the conventional fall prevention device uses a real-time camera that shoots general images, the privacy of the patient is emerging as a very big problem. There is also the problem of having to cut off the operation of the fall prevention device every time.

In addition, since the camera's ability to take images at night or in low-light conditions is significantly reduced, an auxiliary light is inevitably provided to assist this. there is a problem to be

Therefore, in the actual field, the lighting is often kept turned off, so it is very difficult to recognize the screen at night or in low-light situations, and the reality is that it cannot actually perform the function.

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KR Patent Publication No. 10-2018-0044942 (2018.05.03)

The present invention is to solve the above problems, and a patient monitoring system capable of increasing the reliability of real-time patient monitoring by analyzing the signals detected from heterogeneous sensors to accurately determine the patient's condition, such as a fall or respiratory abnormality, and the same It is intended to provide a method.

The patient monitoring system according to an embodiment of the present invention for solving the above problems is a first sensor unit that is disposed on the ceiling of a ward, detects a temperature for a sensing area inside the ward and outputs temperature data, and the At least one second sensor unit disposed on the wall portion of the ward, detecting and outputting a reflected signal for the detection area, and motion and respiration of a patient located in the ward based on at least one of the temperature data or the reflected signal and a determination unit for determining and analyzing the patient's current condition according to the determination result, wherein the sensing area includes a plurality of unit areas in which a bed in the hospital room and a peripheral area of the bed are divided into a plurality of units. can be

In addition, the first sensor unit may be a thermal sensor that detects a temperature in units of 0.1 to 1 second for each of the plurality of unit regions and outputs the temperature data for each time period.

In addition, the second sensor unit may be a radar sensor that transmits a detection signal to the detection area in units of 0.1 to 1 second, and receives and outputs the reflected signal for each time period corresponding to the detection signal.

In addition, the determination unit, a motion determination unit for determining the motion of the patient in the detection area from the temperature data, and a respiration determination unit for determining the respiration of the patient in the detection area from the reflected signal, and the motion determination unit and the respiration Based on at least one of the determination results of each determination unit, it may be configured to include a state analysis unit that determines the current state of the patient in the hospital room as one of a normal state and an emergency state.

And the patient monitoring system may further include a communication unit for transmitting the condition of the patient analyzed by the determination unit to an external device, and an alarm unit for generating an alarm signal based on the condition of the patient analyzed by the determination unit there is.

On the other hand, in accordance with another embodiment of the present invention for solving this problem, a determination unit for analyzing and determining the patient's current state from the detection results of one or more first and second sensor units arranged in a hospital room is provided. A method for monitoring a patient using a monitoring system includes detecting a position of a patient in the hospital room through at least one of the first sensor unit and the second sensor unit, and at least one of the first sensor unit and the second sensor unit. It may be configured to include the steps of determining the motion and respiration of the patient in the hospital room based on the detection result, and analyzing the determination result to determine the patient's state as at least one of a normal state and an emergency state.

In addition, the step of determining the motion and respiration of the patient in the hospital room, the first sensor unit detects the temperature for each time period for the detection area in the hospital room and transmits the temperature data to the determination unit, and the determination unit is the Comparing the temperature data with a reference temperature to calculate the amount of change in temperature for each time period, and comparing the amount of change in temperature with a reference value, and determining the motion of the patient in the sensing region according to the comparison result may be further included.

In addition, the step of determining the motion and respiration of the patient in the hospital room, the second sensor unit receiving the signal reflected from the detection area in the hospital room and transmitting the reflected signal to the determination unit, the determination unit is the Extracting a signal corresponding to the chest region of the patient from among the reflected signals, converting and amplifying the extracted signal to generate signal data, and comparing the signal data with a reference value, and according to the comparison result, the patient in the detection region It may further include the step of determining the respiration of.

And after the step of determining the patient's condition, the step of transmitting the result of the normal state to the outside and the step of transmitting the result of the emergency state to the outside may be configured to further include the steps of generating an alarm signal at the same time .

The patient monitoring system according to the present invention can increase the reliability and accuracy of real-time patient monitoring inside the hospital room by comprehensively analyzing the temperature and signal changes in the hospital room to determine the patient's condition.

In addition, the present invention transmits the monitoring result to an external device and simultaneously generates an alarm so that it can be recognized immediately from the outside, so that the medical staff can quickly respond to the patient's status recognition and follow-up measures.

1 is a diagram showing the configuration of a patient monitoring system according to an embodiment of the present invention;
2 is a view showing an embodiment in which the sensor unit of FIG. 1 is disposed;
3 is a view showing a patient monitoring method according to an embodiment of the present invention;
4 is a diagram specifically showing the step of determining the patient motion of FIG. 3;
Figure 5 is a view showing in detail the step of determining the patient's respiration of Figure 3;
6A to 6C are an embodiment of a patient monitoring method of the present invention;
And
7 is a diagram illustrating an embodiment of analyzing the current state of the patient of FIG. 3 .

Hereinafter, the configuration and operation of the embodiment of the present invention will be described with reference to the accompanying drawings.

It should be noted that the same components in the drawings are indicated by the same reference numbers and symbols as much as possible even though they are indicated in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, when a part "includes" a certain component, this means that other components may be further included rather than excluding other components unless otherwise stated.

In addition, the terms or words used in the present specification and claims should not be construed in the ordinary and dictionary meanings, and the inventors can properly define the concept of the term to describe their invention in the best way. Based on the principle, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application and modifications, and the scope of the present invention is not limited to the embodiments described below.

FIG. 1 is a diagram showing the configuration of a patient monitoring system according to an embodiment of the present invention, and FIG. 2 is a diagram showing an embodiment in which the sensor unit of FIG. 1 is disposed.

1 and 2 , the patient monitoring system 100 of this embodiment may include a sensor unit 110 , a determination unit 120 , a communication unit 130 , and an alarm unit 140 .

The sensor unit 110 may detect the condition of the patient in real time in the ward 10 in which the subject to be monitored, for example, the patient is located. For example, the sensor unit 110 may detect the position, motion, and respiration of the patient in the hospital room 10 .

The sensor unit 110 may include heterogeneous sensors that perform different sensing operations, for example, a first sensor unit 111 and a second sensor unit 113 .

One or more first sensor units 111 may be disposed on the ceiling portion 10a of the hospital room 10 . The first sensor unit 111 is the lower part of the ceiling 10a, that is, the inside of the hospital room 10 or the detection area (SA in FIG. 6A) of the inside of the hospital room 10 by the patient's position change or movement Changes in temperature can be detected. The first sensor unit 111 may be a thermal sensor capable of sensing the temperature of a specific area, that is, the inside of the hospital room 10 or the sensing area.

One or more second sensor units 113 may be disposed on the wall portion 10b of the hospital room 10 . The second sensor unit 113 may detect a signal change due to the patient's respiration with respect to one side of the wall portion 10b, that is, a sensing area inside the hospital room 10 . The second sensor unit 113 may be a radar sensor that receives a signal reflected from a specific target, that is, a patient.

The sensor unit 110 may transmit the detection result of each of the sensor units 111 and 113 to the determination unit 120 . Accordingly, each of the first sensor unit 111 and the second sensor unit 113 of the sensor unit 110 may include a communication unit (not shown) capable of communicating with the determination unit 120 by wire or wirelessly.

In this case, the detection result transmitted from each of the sensor units 111 and 113 may be in the form of time series data. In other words, the first sensor unit 111 may transmit time series temperature data, and the second sensor unit 113 may transmit time series type reflected signals.

In addition, the sensor unit 110 may integrate the detection results of each sensor unit 111 , 113 and transmit it to the determination unit 120 . For example, the first sensor unit 111 operates as a master to receive a detection result, that is, a reflected signal from the second sensor unit 113, and integrate it with its own detection result, that is, temperature data to determine the unit ( 120) can be transmitted.

At this time, since the detection result of the first sensor unit 111 and the detection result of the second sensor unit 113 are in the form of time series data, the first sensor unit 111 may integrate the two detection results by matching them according to the time series. .

The determination unit 120 may determine the motion and respiration of the patient in the hospital room 10 according to the detection result transmitted from the sensor unit 110 , and analyze the current state of the patient according to the determination result. The determination unit 120 may include a motion determination unit 121 , a respiration determination unit 123 , and a state analysis unit 125 .

The motion determination unit 121 determines the temperature change of the corresponding area from the detection result of the first sensor unit 111, that is, the temperature data inside the hospital room 10 or the detection area, and determines whether the patient moves, that is, the motion. can judge The motion determination unit 121 may provide the determination result to the state analysis unit 125 to be described later.

For example, the motion determining unit 121 may receive the temperature data transmitted from the first sensor unit 111 , and may calculate a temperature change amount in comparison with a preset reference temperature. Also, the motion determining unit 121 may compare the calculated amount of temperature change with a reference value, and determine whether the patient moves from the comparison result. In addition, the motion determination unit 121 may provide the determination result to the state analysis unit 125 .

The respiration determination unit 123 may determine the respiration state of the patient from the detection result of the second sensor unit 113 , that is, the reflected signal of the detection area within the hospital room 10 . The respiration determination unit 123 may provide the determination result to the state analysis unit 125 .

For example, the respiration determination unit 123 may receive the reflected signal transmitted from the second sensor unit 113, convert it into digital signal data and amplify it. In addition, the respiration determination unit 123 may compare the amplified signal data with a reference value, and determine the patient's respiration state from the comparison result. In addition, the respiration determination unit 123 may provide the determination result to the state analysis unit 125 .

The state analysis unit 125 may analyze the current state of the patient based on the determination result of at least one of the motion determination unit 121 and the respiration determination unit 123 .

For example, the state analysis unit 125 may analyze the patient's movement form and movement direction from the determination result of the motion determination unit 121 . According to the analysis result, the state analysis unit 125 may determine whether the patient has fallen or whether the patient has entered the hospital room 10 .

In addition, the state analysis unit 125 may analyze the breathing state of the patient from the determination result of the respiration determination unit 123 . According to the analysis result, the state analysis unit 125 may determine the occurrence of respiratory abnormalities in the patient.

On the other hand, in order to accurately analyze and determine various situations occurring in the patient in the hospital room 10, the state analysis unit 125 synthesizes all the determination results of the motion determination unit 121 and the respiration determination unit 123, respectively. The patient's current condition can be analyzed.

For example, when the patient's normal respiration is determined by the respiration determination unit 123 in a state in which the motion determination unit 121 determines the patient's fine movement, the state analysis unit 125 synthesizes the determination results of the patient. It can be determined by analyzing the current state as a normal state, for example, a sleeping state.

In addition, when abnormal respiration of the patient is determined by the respiration determination unit 123 in a state in which the movement of the patient is determined by the motion determination unit 121 , the condition analysis unit 125 synthesizes these determination results to determine the patient's current The state may be determined by analyzing it as a normal state, for example, an active state outside the detection range of the second sensor unit 113 .

As such, the state analysis unit 125 of the present embodiment comprehensively analyzes the determination result of the motion determination unit 121 and the determination result of the respiration determination unit 123 to determine the patient's current state, so that the inside of the hospital room 10 It can enable accurate and immediate patient status judgment and follow-up actions for various situations that may occur in the hospital.

The determination unit 120 transmits the current state of the patient analyzed based on the determination result of at least one of the motion determination unit 121 and the respiration determination unit 123 through the communication unit 130 to an external device, for example, a medical staff terminal, etc. can be sent to

In addition, the determination unit 120 may control the operation of the alarm unit 140 based on the analyzed current state of the patient so that a predetermined alarm is generated from the alarm unit 140 . By the operation of the alarm unit 140 , the medical staff outside the hospital room 10 can immediately recognize the patient's condition and take follow-up measures.

3 is a diagram illustrating a patient monitoring method according to an embodiment of the present invention. Hereinafter, for convenience of description, the patient monitoring method of the present embodiment will be described in detail with reference to FIGS. 1 and 2 with respect to FIG. 3 .

Referring to the drawings, first, the monitoring system 100 detects the position of the patient in the hospital room 10 using at least one of the first sensor unit 111 and the second sensor unit 113 of the sensor unit 110 . can be (S10).

As shown in FIGS. 2 and 6A , the first sensor unit 111 is disposed on the ceiling portion 10a of the hospital room 10 to set a predetermined detection area SA inside the hospital room 10 below it. there is. In this case, the sensing area SA may be set to include a plurality of unit areas, for example, approximately 16 unit areas P0 to P15, for the bed on which the patient is located and its surroundings, for example, one area of the bed.

In addition, the first sensor unit 111 may detect a temperature value for each unit area P0 to P15 of the sensing area SA, and provide it to the determination unit 120 as temperature data. Accordingly, the determination unit 120 may detect the presence or absence of a patient in the sensing area SA of the hospital room 10 based on the temperature data provided from the first sensor unit 111 .

In addition, the second sensor unit 113 is disposed on the wall portion 10b of the hospital room 10 and transmits a detection signal to the side direction, for example, the detection area SA set by the first sensor unit 111, The reflected signal may be received accordingly.

Next, the second sensor unit 113 may provide the received reflected signal to the determination unit 120 , and the determination unit 120 may detect the presence or absence of a patient in the hospital room 10 based on the reflected signal. Here, the second sensor unit 113 may receive a reflected signal by transmitting a detection signal from the wall portion 10b to the bed of the patient.

Next, the monitoring system 100 may determine the motion or respiration of the patient in the hospital room 10 based on data transmitted from the sensor unit 110, for example, at least one of temperature data and signal data.

For example, the motion determination unit 121 of the determination unit 120 receives the temperature data transmitted from the first sensor unit 111 , and analyzes the degree of change in the received temperature data to determine the detection area SA within the hospital room 10 . ) may determine the motion of the patient located in (S20).

In addition, the respiration determination unit 123 of the determination unit 120 receives the reflected signal transmitted from the second sensor unit 113, analyzes the received reflected signal, and is located in the detection area SA in the hospital room 10 It is possible to determine the patient's breathing (S30).

Here, the motion determination unit 121 and the respiration determination unit 123 may be operated in parallel to determine the patient's motion and respiration. In addition, according to another embodiment of the present invention, after the motion determining unit 121 first determines the patient's motion, the respiration determining unit 123 may determine the patient's respiration.

FIG. 4 is a diagram specifically illustrating a step of determining a patient motion of FIG. 3 .

Referring to FIGS. 3 and 4 , the motion determining unit 121 may receive temperature data in the hospital room 10 for each time period from the first sensor unit 111 ( S110 ).

Here, the first sensor unit 111 detects the temperature by time for each unit area P0 to P15 of the detection area SA in the hospital room 10 , and transmits it as temperature data to the motion determination unit 121 . can In this case, the first sensor unit 111 may sense the temperature in units of 0.1 to 1 second for each unit region P0 to P15.

The motion determining unit 121 compares the received temperature data with a preset reference temperature to calculate the amount of temperature change for each time period (S120). As shown in FIG. 6B , the calculated amount of change in temperature may be an absolute value of the difference between the reference temperature and the temperature data.

Next, the calculated amount of temperature change is compared with a reference value (S130), and the motion of the patient in the sensing area SA, that is, the motion, can be determined according to the comparison result (S140, S150).

For example, if the temperature change is greater than the reference value (Y), the motion determining unit 121 may determine that the patient is in a motion state, that is, in a moving state within the sensing area SA (S140). On the other hand, if the amount of temperature change is equal to the reference value (N), the motion determining unit 121 may determine that the patient is not moving within the sensing area SA (S150). Here, the reference value may be 0.

6A and 6B , the motion determining unit 121 compares the temperature data for each time period of each unit area P0 to P15 provided from the first sensor unit 111 with the reference temperature data, for example, 280 for each unit. A temperature change amount (|P0|~|P15|) for each time period for the regions P0 to P15 may be calculated.

Here, the temperature change amount (|P0|~|P15|) may be calculated in the form of an absolute value of the difference between the temperature data for each time period of each unit area (P0~P15) and the reference temperature data. However, when the temperature data provided from the first sensor unit 111 is the same as or smaller than the reference temperature data, the motion determining unit 121 may calculate the amount of temperature change as 0.

Next, the motion determining unit 121 may determine the movement state and the direction of the patient in the sensing area SA based on the calculated amount of temperature change (|P0| to |P15|).

That is, as shown by the arrow shown in FIG. 6B , the amount of temperature change (|P0|~|P15|) of the sensing area SA is measured in unit areas P3, P7, P11 and P15 corresponding to one side of the bed for each time period. It shows a trend of increasing to the unit areas (P1, P5, P9, and P13) corresponding to the central part of . Accordingly, the motion determining unit 121 may determine that the patient located in the hospital room is moving in the direction of the bed.

Although not shown in FIG. 6B, in the opposite case, that is, the amount of temperature change (|P0|~|P15|) of the sensing area SA is in the unit areas P1, P5, P9 and P13 corresponding to the center of the bed. When the unit areas (P3, P7, P11, and P15) corresponding to one side of are increased by time period, the motion determining unit 121 may determine that the patient located in the hospital room is moving from the bed to one side of the bed. there is.

On the other hand, if it is determined that the patient does not move in the area corresponding to the bed among the detection areas SA in the hospital room, the motion determination unit 121 calculates an average value of the previously received temperature data, and sets the calculated average value to the reference temperature. can be reset to

Then, the motion determination unit 121 compares the temperature data in the hospital room 10 for each time period received from the above-described first sensor unit 111 with the reset reference temperature to calculate the amount of temperature change (S110, S120). can be repeated.

In this way, the motion determination unit 121 can determine the patient's motion state within the detection area SA in the hospital room 10 from the comparison and analysis of the temperature data for each time period provided from the first sensor unit 111 . there is.

Also, the motion determining unit 121 may provide the determined patient's motion state and the calculated amount of temperature change for each time period to the state analyzing unit 125 .

5 is a diagram specifically illustrating the step of determining the patient's respiration of FIG. 3 .

Referring to FIGS. 3 and 5 , the respiration determination unit 123 may receive a reflected signal in the hospital room 10 for each time period from the second sensor unit 113 ( S210 ).

Here, the second sensor unit 113 transmits a detection signal to the detection area SA in the hospital room 10 , receives a signal reflected by the patient positioned on the bed, and sends it to the respiration determination unit 123 . It can be transmitted as a reflected signal by the patient. In this case, the second sensor unit 113 may transmit a detection signal to the detection area SA in a time unit of 0.1 to 1 second to receive a reflected signal.

The respiration determination unit 123 may extract a reflected signal corresponding to the chest region of the patient from among the received reflected signals (S220).

Here, the reflected signal received by the respiration determination unit 123 may include a patient's respiration signal, a heartbeat signal, and noise. Accordingly, the respiration determination unit 123 may extract a reflected signal corresponding to the chest region of the patient, that is, a reflected signal corresponding to respiration, by performing a process of removing noise from the received reflected signal.

For example, the respiration determination unit 123 may use a median filter to remove impulse noise included in the received reflected signal. In this case, when the standard deviation value within the window of the filter exceeds a threshold, the respiration determination unit 123 may recognize it as impulse noise and remove it.

Next, the respiration determination unit 123 uses a specific frequency band, for example, a band pass filter having a 0.1 to 1.5 Hz band or a Moving Averaging Window (MAW) to exclude signals in the frequency range corresponding to the patient's respiration. The rest can be removed.

Accordingly, the respiration determination unit 123 may extract only the reflected signal corresponding to the patient's respiration among all the reflected signals.

Next, the respiration determination unit 123 may convert the extracted chest region reflected signal into digital signal data, and amplify the converted signal data at least once (S230).

Next, the respiration determination unit 123 may compare the amplitude of the amplified signal data with a reference value (S240), and determine the patient's respiration state according to the comparison result (S250, S260).

As shown in FIG. 6C, when the amplitude of the signal data SD is maintained for a predetermined time, for example, 0.1 to 1 second, the reference value Ref_V or more (section A), the respiration determination unit 123 is It can be determined that the state is breathing normally (S250).

Here, when it is determined that the patient is breathing normally, the respiration determination unit 123 extracts a reflected signal corresponding to the chest region of the patient from the reflected signal received from the above-described second sensor unit 113 (S210, S220) may be repeatedly performed.

On the other hand, when the amplitude of the signal data SD is maintained below the reference value Ref_V for a predetermined time (section B), the respiration determination unit 123 may determine that the patient is in an abnormal respiration, for example, apnea. There is (S260).

In this way, the respiration determination unit 123 may determine the respiration state of the patient in the hospital room 10 from the comparison and analysis of the reflected signals for each time period provided from the second sensor unit 113 . In addition, the respiration determination unit 123 may provide the determined patient's respiration state to the state analysis unit 125 .

Referring back to FIG. 3 , the state analysis unit 125 of the determination unit 120 is at least one of the patient's motion determined by the motion determination unit 121 and the patient's respiration determined by the respiration determination unit 123 . According to the determination result of , it is possible to determine by analyzing the current state of the patient in the hospital room 10 (S40).

The state analysis unit 125 may determine the patient's state as one of a normal state and an emergency state. In addition, the state analysis unit 125 may transmit the determination result to an external device through the communication unit 130 , and may output an alarm signal through the alarm unit 140 .

For example, when the condition analysis unit 125 determines that the patient's condition is normal, the medical staff's terminal or an external device such as a hospital patient management system is located outside the hospital room 10 through the communication unit 130 . can be sent to

On the other hand, when the condition of the patient is determined to be an emergency state, the condition analysis unit 125 transmits it to an external device through the communication unit 130 and simultaneously outputs an alarm signal through the alarm unit 140 to the patient. of emergency can be propagated to the outside.

Hereinafter, the step of analyzing the current state of the patient according to the present embodiment will be described in more detail with reference to FIG. 7 .

7(A), the determination result of the motion determination unit 121 is 0, that is, the patient's motion is determined, and the determination result of the respiration determination unit 123 is 0, that is, the patient's apnea is determined. may be in a state of

Accordingly, the state analysis unit 125 may synthesize and analyze the two determination results, and may determine that the patient is in a normal state in which the patient does not currently exist in the ward 10 according to the analysis result. In addition, the state analysis unit 125 may transmit the determined normal state result to the external device through the communication unit 130 .

In addition, as shown in FIG. 7B, the determination result of the motion determination unit 121 is 1, that is, the patient's movement is determined, and the determination result of the respiration determination unit 123 is 1, that is, the patient's normal breathing. This may be the determined state.

Accordingly, the state analysis unit 125 synthesizes and analyzes the two determination results, and according to the analysis results, a patient currently exists in the hospital room 10 , and the patient can determine that the patient is in a normal state showing normal movement and breathing. . In addition, the state analysis unit 125 may transmit the determined normal state result to the external device through the communication unit 130 .

In addition, in the case of (B) of FIG. 7 , the state analysis unit 125 may analyze a movement line according to the patient's motion. The analysis of the patient's movement by the state analyzer 125 may be performed according to the determination of the direction of the patient's movement within the sensing area SA of the motion determining unit 121 described above with reference to FIG. 6B .

As shown in FIG. 7C , the determination result of the motion determination unit 121 may be 0, and the determination result of the respiration determination unit 123 may be 1.

Accordingly, the state analysis unit 125 synthesizes and analyzes the two determination results, and according to the analysis result, the patient is currently in the hospital room 10 , and the patient is in a sleeping state, showing normal breathing. can In addition, the state analysis unit 125 may transmit the determined normal state result to the external device through the communication unit 130 .

On the other hand, as shown in (D) of Figure 7, in a state in which the determination result of the motion determination unit 121 is 0, the determination result of the respiration determination unit 123 may be changed from 1 to 0.

Accordingly, the state analysis unit 125 may synthesize and analyze the two determination results, and according to the analysis result, determine that the patient currently in the hospital room 10 is in an emergency state in which a respiratory abnormality has occurred. And, the state analysis unit 125 transmits the result of the determined emergency state to an external device through the communication unit 130 and, at the same time, controls the operation of the alarm unit 140 to generate an alarm signal, so that the patient's condition can be immediately recognized from the outside.

In addition, as shown in (E) of Figure 7, in a state in which the determination result of the respiration determination unit 123 is 0, the determination result of the motion determination unit 121 may be changed from 1 to 0.

Accordingly, the state analysis unit 125 may synthesize and analyze the results of the two determinations, and according to the analysis results, determine that the patient currently located in the hospital room 10 is in an emergency state in which a situation such as a fall has occurred. In addition, the state analysis unit 125 transmits the determined emergency state result to an external device through the communication unit 130 and, at the same time, controls the operation of the alarm unit 140 to generate an alarm signal, so that the patient's state can be immediately recognized from the outside.

For example, as described above with reference to FIG. 6B , according to the time-dependent change trend of the temperature change amount (|P0|~|P15|) of the sensing area SA, the motion determining unit 121 moves toward one side of the patient's bed. Movement can be judged.

In this state, when the amount of temperature change of the same size is calculated for several hours, for example, several seconds or tens of seconds, in the unit areas (P3, P7, P11, and P15) corresponding to one side of the bed in the direction in which the patient moves, the motion determining unit ( 121) may determine that the patient has changed to a non-moving state in the corresponding unit area.

Accordingly, the state analysis unit 125 may synthesize and analyze the determination result of the motion determination unit 121 and the determination result of the respiration determination unit 123 and determine the occurrence of the patient's emergency state therefrom.

At this time, the determination result of the motion determining unit 121 was changed from 1 to 0 in the patient's movement, that is, the determined position is the unit area P3, P7, P11 and P15 corresponding to one side of the bed. ), the state analysis unit 125 may determine that an emergency state has occurred because the patient located in the hospital room 10 fell from the bed.

As described above, the patient monitoring method according to the present embodiment determines the motion and respiration of the patient through temperature and signal detection for the detection area SA set inside the hospital room 10, and analyzes these determination results to determine the patient's room (10) It is possible to immediately determine the condition of the patient from the inside, for example, an emergency condition such as a fall or respiratory abnormality that may occur to the patient.

Therefore, the present invention can increase the reliability and accuracy of real-time patient monitoring inside the hospital room 10 by comprehensively analyzing the temperature and signal changes in the hospital room 10 to determine the patient's condition.

In addition, the present invention transmits the monitoring result to an external device and simultaneously generates an alarm so that it can be recognized immediately from the outside, so that the medical staff can quickly respond to the patient's status recognition and follow-up measures.

100: monitoring system 110: sensor unit
111: first sensor unit 113: second sensor unit
120: judgment unit 121: motion judgment unit
123: respiration determination unit 125: state analysis unit
130: communication unit 140: alarm unit

Claims (18)

A patient monitoring system for monitoring a patient's condition using heterogeneous sensors that perform different sensing operations, the patient monitoring system comprising:
one or more first sensor units disposed on the ceiling of the hospital room, the first sensor unit for outputting temperature data by sensing a temperature changed by a position change or movement of a patient with respect to a sensing area inside the hospital room;
a second sensor unit disposed at least one on the wall of the hospital room and sensing and outputting a reflected signal to the sensing area; and
a determination unit for determining motion and respiration of the patient located in the hospital room based on at least one of the temperature data or the reflected signal, and analyzing the current state of the patient according to the determination result;
including,
The sensing area includes a plurality of unit areas in which a bed in the hospital room and a peripheral area of the bed are divided into a plurality,
The first sensor unit,
Consists of a thermal sensor that detects the temperature in units of 0.1 to 1 second for each of the plurality of unit areas and outputs the temperature data for each time period,
The second sensor unit
Transmitting a detection signal to the detection area in units of 0.1 to 1 second, receiving and outputting the reflected signal for each time period corresponding to the detection signal,
The determination unit is
a motion determination unit for determining the motion of the patient in the sensing area from the temperature data;
Respiratory determination unit for determining the respiration of the patient in the sensing area from the reflected signal; and
and a state analysis unit that determines the current state of the patient in the hospital room as one of a normal state and an emergency state based on at least one of the determination results of the motion determination unit and the respiration determination unit, respectively,
The motion determination unit,
Comparing the temperature data with a reference temperature, calculating the amount of change in temperature for each time period for each of the plurality of unit areas, and comparing the amount of temperature change with a reference value to determine the patient's motion, If the amount of temperature change is greater than the reference value, the movement state and direction of the patient is determined, and if the temperature change amount is the same as the reference value, it is determined as the patient's motionless state,
When the patient's immobility is judged,
The motion determining unit resets the reference temperature by calculating an average value of the temperature data,
The respiration determination unit,
The patient's chest signal is extracted from the reflected signal, converted and amplified to generate signal data, and the signal data is compared with a reference value to determine whether the patient is breathing normally, and if the amplitude of the signal data is greater than or equal to the reference value, the patient is determined as normal respiration, and if the amplitude of the signal data is less than the reference value, it is determined as abnormal respiration of the patient,
The state analysis unit
When the patient's respiration is determined to be normal by the respiration determination unit in a state where the motion determination unit determines the patient's fine movement, the patient's current state is determined as sleeping,
When the patient's respiration is determined to be abnormal by the respiration determination unit in a state where the motion determination unit determines the patient's movement, the patient monitoring system determines the current condition of the patient as an active state outside the detection range. delete delete delete delete delete delete delete delete According to claim 1,
a communication unit for transmitting the condition of the patient analyzed by the determination unit to an external device; and
The patient monitoring system according to claim 1, further comprising an alarm unit that generates an alarm signal based on the condition of the patient analyzed by the determination unit.



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