JP2773694B2 - Medical telemeter system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hospital ICU, C
The present invention relates to a medical telemeter system used by a CU or the like to monitor changes in the condition of a plurality of patients.

[0002]

2. Description of the Related Art Conventionally, a medical telemeter system has been used for patient monitoring in hospital ICUs, CCUs, and the like. For example, as shown in Japanese Patent Application Laid-Open No. Hei 5-161611, "Medical Telemeter Apparatus," ), And a receiver for displaying and recording the transmitted biometric data.

FIG. 6 is an external view showing a configuration example of such a conventional medical telemeter system. In the example of FIG. 6, the multi-phenomenon transmitter 1 transmits various types of biometric data input from the electrodes or the transducer 1a to the center monitor 3 and the bedside monitor 5 from the antenna 1b. Further, the ECG-dedicated transmitter 2 transmits an electrocardiogram signal and the like input from the electrode 2a to the center monitor 3 and the bedside monitor 5 by radio waves from an antenna (lead wire).

[0004] The center monitor 3 is installed in a nurse station or the like, receives the transmission wave of the biological data transmitted from the multi-phenomenon transmitter 1 and the ECG-dedicated transmitter 2 received by the receiving antenna 3a, and receives various signals from a plurality of monitored patients. Display and monitor the measured values or waveforms on the screen.
It is recorded in.

[0005] The bedside monitor 5 is arranged near the bed of the patient together with a recording device, and displays a waveform and measurement data of the biological data from the ECG-dedicated transmitter 2 received by the antenna 5a, and records it by the recording device 6. . The center monitor 3 and the bedside monitor 5 operate as a receiving device including the recording devices 4 and 6, and have a built-in analyzing device, and display on the screen analytical data obtained by analyzing data in a living body.

FIG. 7 is a block diagram showing a detailed configuration example of the multi-phenomenon transmitter 1 shown in FIG. 6 for performing such measurement and analysis. FIG. 8 shows another configuration example of the multi-phenomenon transmitter 1. FIG. In the examples of FIGS. 7 and 8, the biological signals are analyzed by the operation units 9a and 10a, and the measurement data and the analysis data are transmitted from the transmission units 9b and 10b to the center monitor 3 and the bedside monitor 5 shown in FIG. I do. in this case,
The heart rate data and the arrhythmia data are transmitted when the biological signal is an electrocardiogram waveform. Further, when the biological signal is an invasive blood pressure waveform, the blood pressure value data is transmitted. The center monitor 3 and the bedside monitor 5 receiving this transmission display the heart rate data, arrhythmia data and blood pressure value data,
And record.

FIG. 9 is a diagram for explaining a transmission / reception state in the medical telemeter system including the multi-phenomenon transmitter 1, the ECG-dedicated transmitter 2, and the center monitor 3.
The example of FIG. 9 is used for each patient, and transmitters 11a, 11b,... Transmitting on channels 1, 2,.
11n (multi-phenomenon transmitter 1 or ECG-dedicated transmitter 2) transmits measurement data and analysis data. This transmission wave is received by the receivers 12a, 12b... 12n set to the frequencies corresponding to the channels 1 to N of the center monitor 3.

FIG. 10 is a diagram for explaining a transmission / reception state in the medical telemeter system including the multi-phenomenon transmitter 1, the ECG-dedicated transmitter 2, and the bedside monitor 5. In the example of FIG. 10, transmitters 11a, 11b,... Of channels 1 to N which are used for each patient and have different transmission frequencies.
Measurement data and analysis data are received by the receiving unit 13a of the bedside monitor 5, and channels 1 to N are selected by the channel selecting unit 13b.

[0009]

However, in the above-mentioned conventional medical telemeter system, in the example shown in FIG. 9, transmitters 11a to 11n corresponding to channels 1 to N are used.
And the receiving units 12a to 12n are required. Further, in the example shown in FIG. 10, only the set channel can be monitored. When monitoring a plurality of patients, it is necessary to change the channel each time.

As a countermeasure, a system that receives all transmission waves (measurement data and analysis data) from many transmitters can be considered. For example, the center monitor 3 and the bedside monitor 5 can receive transmission waves from a large number of transmitters by a time division multiplexing (TDMA) method, a polling method, an interrupt processing method, or the like. In this case, a synchronization process or the like is necessary, and the signal processing scale and the device scale are increased.

The present invention solves such disadvantages in the prior art, and can monitor changes in the condition of a plurality of patients quickly and reliably with a relatively simple structure.
Nurse call and also know the transmitter power supply voltage drop
Provide a medical telemeter system that can be used .

[0012]

In order to achieve the above object, according to the present invention, a plurality of transmitters transmit biometric data at different frequencies and receive biometric data from the transmitters. A first wireless transmission means for transmitting input biometric data to the transmitter, and an alarm signal indicating a change in condition when the biometric data exceeds a preset range. When there is a nurse call and the transmitter power
An alarm signal is also issued when the source voltage falls below the specified voltage.
An alarm detecting means for transmitting, and a second wireless transmission in which a plurality of transmitters transmit the alarm data from the alarm detecting means and the data for identifying the transmitter at the same frequency as the first wireless transmitting means at a different frequency. First receiving means for selecting and receiving a transmission wave from a first wireless transmission means in each of the plurality of transmitters, and demodulating biometric data; and Receiving means for receiving a transmission wave from the second wireless transmitting means and demodulating the alarm data and the identification data, and displaying the biological data, the alarm data and the identification data from the first receiving means. Means.

According to a second aspect of the present invention, in the medical telemeter system, the alarm detecting means performs arithmetic processing on the amplified biological signal.
And a power supply in the transmitter
The battery voltage that detects that the battery voltage has fallen below the specified value
A voltage monitoring circuit and a detection signal are output from the battery voltage monitoring circuit.
Pressed and nurse call switch turned on
I / O circuit for notifying that the I / O circuit
Send an alarm signal when CPU outputs
It has an I / O circuit .

According to a third aspect of the present invention, in the medical telemeter system, the second receiving means of the receiver demodulates the call data and the voltage data together with the biological data, the alarm data and the identification data, and displays the demodulated data on the display means. .

[0015] Medical telemeter system with such a configuration
According to the information in the alarm data
Call data to notify the call
The signal indicating the voltage drop is weighted. This will
Nurse call from the person is quickly identified, and
The consumption of the power supply battery is definitely found.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First , a prerequisite embodiment of a medical telemeter system according to the present invention will be described with reference to the drawings. FIG. 1 is a premise of the medical telemeter system of the present invention.
1 is a block diagram showing a schematic configuration of an embodiment. FIG.
The electrocardiogram output by the electrode or Tran juicer fitted to the individual patient, breathing, blood pressure, respectively biometric data such as pulse wave, and the transmission frequency is in a different channel 1, 2 ... N,
A transmitter 20a, 20b... 20n for wirelessly transmitting an alarm to be described later on the same frequency channel A, and a bedside for receiving and displaying the biometric data and the alarm data transmitted from the transmitters 20a to 20n. It is schematically configured with a receiver 30 such as a monitor.

FIG . 2 shows transmitters 20a to 20n and receiver 3
FIG. 2 is a block diagram showing a detailed configuration of the 0 ’. In FIG. 2, transmitters 20a to 20n have the same configuration, and an amplifier 21 that amplifies a biometric data signal, performs subcarrier modulation, frequency modulation, and power amplification on a biometric data signal output from the amplifier 21, and performs a predetermined Frequency (channels 1 to
N), and a transmission unit 22 that outputs the high-frequency power set in (N).

Further, the biological data output from the amplifier 21 is arithmetically processed to detect a change in the patient's condition, and an alarm detector 23 for outputting the alarm data, and the alarm data output from the alarm detector 23 are modulated. And a transmitter 24 that outputs high-frequency power having a frequency different from that of the transmitters 20a to 20n and the same frequency as the transmitters 20a to 20n. Further, it has an antenna 26 for transmitting the high-frequency power output from the transmission units 22 and 23, and a power supply unit 25 using a rechargeable battery for supplying DC to each unit.

The receiver 30 includes an antenna 31 for receiving radio waves transmitted by the transmitters 20a to 20n,
A receiving unit 32 that converts the frequency of the received signal from, for example, and outputs the demodulated biological data, and a receiving unit 33 that frequency-converts the received signal from the antenna 31 and outputs the demodulated alarm data, for example. have. Also,
A display processing unit 35 for performing image processing for displaying the biological data number from the receiving unit 32 and the alarm data from the receiving unit 33, and a display for displaying the biological data and the alarm data from the display processing unit 35 Unit 36, and for manually setting channels 1 to N received by the receiving unit 32,
For example, a channel selection unit 37 that outputs a local oscillation signal for frequency conversion is provided.

FIG . 3 is a block diagram showing a detailed configuration example of the alarm detection section 23. 3 is an A / D converter 5 configured by a one-chip microcomputer or the like and converting an amplified biological signal output from the amplifier 21 into a digital signal.
0 and a CPU 51 that outputs alarm data when an alarm is detected by performing arithmetic processing on the amplified biological signal from the A / D converter 50. Also, C
Processing the alarm data output by the PU 51 and transmitting the data
4 has an input / output (I / O) circuit 52 for outputting the data to the RAM 4, a working RAM 53, and a ROM 54 storing a control program.

Next, the operation of this embodiment will be described. 1 to 3, transmitters 20 a to 20 n correspond to electrocardiograms output from individual patient electrodes or transducers,
Respective biological signals such as respiration, blood pressure, and pulse wave are amplified by the amplifier 21 shown in FIG. The transmission unit 22 performs subcarrier modulation, frequency modulation, and power amplification on the biometric data signal, sends out high-frequency power of a predetermined frequency (channels 1 to N) to the antenna 26 , and wirelessly transmits it to the receiver 30.

[0022] At the same time enter the amplified biosignal amplifier 21 outputs the alarm detector 23, here in the arithmetic processing,
Detect changes in the patient's condition. The alarm data is output to the transmission unit 24, and frequency modulation and power amplification are performed.
Antenna frequency power of a predetermined frequency (channel A) 26
And wirelessly transmits to the receiver 30. As will be described later, the transmission of the alarm data is performed only a predetermined number of times when an alarm occurrence is detected, and the alarm transmission from the other transmitters 20a to 20n is prevented from being interfered with by the receiver 30. , So that the alarm can be reliably received by the receiver 30.

In the alarm detecting section 23, A / A shown in FIG.
The D converter 50 converts the amplified biological signal output from the amplifier 21 into a digital signal. The CPU 51 detects the occurrence of an alarm from the amplified biological signal using the control program for measurement and analysis calculation stored in the ROM 54 and outputs the detected alarm to the transmission unit 24 through the I / O circuit 52.

[0024] The alarm detection, if the biological signals of the electrocardiogram, when the heart rate exceeds a preset upper or lower limit, or when it becomes cardiac arrest, or even if the arrhythmia has occurred. In addition, when the alarm is detected as breathing, it means that the respiratory rate exceeds a preset upper limit value or lower limit value, or that the apnea time exceeds a predetermined time. Further, when the alarm detection is blood pressure, the occurrence of an alarm is detected when the blood pressure value exceeds a preset upper limit or lower limit.

[0025] In response to the type of the thus biological signal, performs the detection. Also, it is possible to detect the detachment of the electrode attached to the patient from the impedance or the voltage value of the biological signal input terminal. Also, the transmitters 20a to 2 that have detected the alarm
Also, data of an identification number (ID) for identifying 0n and channel numbers (1 to N) are transmitted.

The transmission unit 24 to which the alarm detection signal from the alarm detection unit 23 is input transmits alarm data a predetermined number of times only when an alarm occurrence is detected. As a result, it is possible to avoid interference of alarm transmissions from the other transmitters 20a to 20n at the receiver 30.

In the receiver 30, the channel selection section 37 sets one of the channels 1 to N and monitors the patient (transmitters 20a to 20n).
n is received by the antenna 31, and the received signal is input to the receiving unit 32. The receiving section 32 converts the received signal into a frequency, for example, and outputs the demodulated biometric data to the display processing section 35. At the same time, the received signal is input to the receiving unit 33, for example, to perform frequency conversion and detect alarm data. The receiving unit 33 outputs the alarm data to the display processing unit 35 only when a predetermined number of alarm data transmitted from the transmitters 20a to 20n can be normally detected.

[0028] If the alarm data can not be detected normally, ignore the alarm data in this case, carry out the normal detection of alarm data that is sent to the next time. In the display etc. processing unit 35, the biological data from the receiving unit 32 and the receiving unit 3
The image processing and the like for displaying the alarm data from 3 are performed and output to the display unit 36, where the biological data and the alarm data are displayed.

[0029] The medicine of this, embodiments to be this assumption
In the telemeter system for use , the receiver 30 receives biological data from the transmitters 20a to 20n on channels 1 to N having different frequencies, and detects and displays an alarm indicating a patient's condition change on channel A of one frequency. doing.
Therefore, there is no need to provide receivers corresponding to channels 1 to N. That is, the identification number and channel number (1 to 1) displayed when the alarm data is received.
From N), it is possible to easily specify the patient (transmitters 20a to 20n) in which the alarm is detected and the body change occurs. In other words, with a relatively simple configuration, changes in the condition of a plurality of patients can be monitored quickly and reliably, and the radio waves can be effectively used.

FIG . 4 is a block diagram of an alarm detecting unit according to the present invention .
FIG. 2 is a block diagram illustrating a detailed configuration example of the embodiment . FIG.
The, A / D converter 50 of the embodiment shown in FIG. 3, CPU
51, the I / O circuit 52, RAM 53 and ROM 54, a nurse call switch (SW) 55 which is operated for the patient to notify the call nurse is provided.
Further, the power supply voltage monitoring circuit 56 monitors the battery voltage of the power supply unit 25 built in the transmitters 20a to 20n and outputs a detection signal when the power supply unit 25 is exhausted. Signal to CPU 51
And an I / O circuit 57 for sending out to the

Next, the operation of the embodiment of the present invention. The alarm detecting section 23a, A of FIG. 3
It operates in the same manner as the alarm detection unit 23, and turns on the nurse call SW 55, sends a detection signal from the power supply voltage monitoring circuit 56 to the CPU 51, and transmits this data as alarm data. Further, it transmits data of an identification number (ID) for identifying the transmitters 20a to 20n that have transmitted the alarm data and data of channel numbers (1 to N). Other operation of the transmitter 20a~20n is the same as the actual <br/> facilities embodiment of FIG.

The receiver 30 turns on the nurse call SW 55 sent by the alarm detector 23a,
From 6 on, the display unit 36 displays a detection signal indicating a voltage drop (consumption), data of an identification number and channel numbers (1 to N). The other processes in the receiver 30 are the same as those in the first embodiment.

[0033] Consequently, in embodiments of the present invention, together with the biometric data, the transmitter 20a~20n during alarm data
And the data of the channels 1 to N and the data of the nurse call and the consumption of the power battery, so that the nurse call from the patient (transmitters 20a to 20n) can be performed quickly. , And the consumption of the battery is surely determined.

FIG . 5 is a block diagram showing another example of the configuration of the receiver 30a . The receiver 30a in FIG. 5 includes an antenna 31, a receiving unit 32, a receiving unit 33, and the same as in the embodiment in FIG.
It has a display processing section 35 and a display section 36, and has an automatic channel selection section 40 for automatically switching the receiving section 32 to the channels 1 to N of the transmitters 20a to 20n that transmitted the alarm data.

Next, the operation of this embodiment will be described. In FIG. 3, when the receiving unit 33 detects alarm data, the
Then, the transmitters 20a to 20n that have detected the alarm and transmitted the alarm data are discriminated by the data of the identification numbers and the channel numbers (1 to N), and transmit the discrimination signal to the receiving unit 32. The receiving unit 32 automatically sets the receiving frequency of the receiving unit 32 to the frequency of the channels 1 to N of the transmitters 20a to 20n to which the receiving unit 32 has transmitted the alarm data based on the determination signal.

[0036] Accordingly, to automatically set the reception frequency of the receiver 32 to the frequency of the channel 1~N patients that sent the alarm data (transmitter 20 a to 20 n), so that the reception can be quickly and reliably Become.

[0037]

As is apparent from the above description, the present invention
According to the medical telemetry system, the condition changes in the patient
Call to notify nurse call during alarm data shown
Output data and the signal indicating the voltage drop of the power battery
I have. This allows for quick nurse calls from patients
And that the transmitter battery has been exhausted.
You.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment on which a medical telemeter system according to the present invention is based.

FIG. 2 is a block diagram showing a detailed configuration of a transmitter and a receiver in FIG.

FIG. 3 is a block diagram illustrating a detailed configuration example of an alarm detection unit illustrated in FIG. 2;

FIG. 4 is a block diagram showing a detailed configuration example of an alarm detection unit in the embodiment of the medical telemeter system of the present invention.

FIG. 5 is a block diagram showing another configuration example of the receiver in another embodiment.

FIG. 6 is an external view showing a configuration example of a conventional medical telemeter system.

FIG. 7 is a block diagram showing a detailed configuration example of the multi-phenomenon transmitter shown in FIG. 6;

FIG. 8 is a block diagram showing another example of the configuration of the multi-phenomenon transmitter in the conventional example.

FIG. 9 is a diagram for explaining a transmission / reception state of a medical telemeter system using a center monitor in a conventional example.

FIG. 10 is a diagram for explaining a transmission / reception state in a medical telemeter system using a bet side monitor in a conventional example.

[Explanation of symbols]

 20a to 20n Transmitter 30, 30a Receiver 22, 24 Transmitter 23, 23a Alarm detector 32, 33 Receiver 35 Display processing unit 36 Display unit 37 Channel selection unit 40 Automatic channel selection unit 51 CPU 55 Nurse call SW 56 Power supply voltage monitoring circuit

Claims (3)

(57) [Claims] 1. A medical telemeter system in which a plurality of transmitters transmit biometric data at different frequencies and display biometric data from the transmitters at a receiver, wherein the biometric data input to the transmitter is a first wireless transmission means for transmitting, sends out an alarm signal indicating a condition change when outside the range in which biometric data has been set in advance, the nurse call
And the power supply voltage of the
Alarm detection means for sending an alarm signal also when the first wireless transmission means and the alarm data from the alarm detection means and the data for identifying this transmitter at the same frequency and a plurality of transmitters at the same frequency Second to send
First receiving means for selecting and receiving a transmission wave from the first wireless transmitting means in each of the plurality of transmitters and demodulating biometric data, A second reception unit that receives a transmission wave from a second wireless transmission unit of the transmitter and demodulates alarm data and identification data; and converts biological data, alarm data, and identification data from the first reception unit. A display means for displaying, a medical telemeter system comprising: 2. The CPU according to claim 1, wherein said alarm detecting means performs arithmetic processing on the amplified biological signal to detect a change in body condition.
And that the voltage of the power battery in the transmitter has fallen below the specified value.
A battery voltage monitoring circuit for detecting that a detection signal has been output from the battery voltage monitoring circuit.
Notification that the Nurse Call switch has been turned on
When there is an output from the I / O circuit , the I / O circuit and the CPU
2. The medical telemeter system according to claim 1, further comprising an I / O circuit that sends an alarm signal to the medical telemeter system. 3. The medical device according to claim 1, wherein the second receiving unit of the receiver demodulates the call data and the voltage data together with the biological data, the alarm data, and the identification data, and displays the demodulated data on the display unit. Telemeter system.