JP7674938B2 - Patient Monitor - Google Patents

Description

The present invention relates to a biological information monitor that receives biological information transmitted wirelessly, such as a central monitor.

Conventionally, a central monitor installed in a nurse's station at a medical institution is known as a vital sign monitor that monitors the condition of multiple patients. The central monitor receives vital signs of each patient (e.g., electrocardiogram, blood pressure, arterial blood oxygen saturation, etc.) from a bedside monitor installed at the bedside of each patient in an intensive care unit or hospital room, and displays it on a screen (see, for example, Patent Document 1).

In recent years, medical telemetry systems that use wireless technology to monitor patients' vital signs have become widespread. Medical telemetry systems use radio waves to monitor vital signs such as electrocardiograms from a distance, making them an indispensable tool for helping to improve medical services and reduce the burden on medical staff.

A medical telemetry system is composed of a biometric information acquisition terminal, such as a telemetry transmitter or a bedside monitor, and a central monitor that receives and demodulates the biometric information wirelessly transmitted from the biometric information acquisition terminal (see, for example, Patent Document 2).

The central monitor demodulates the vital signs wirelessly transmitted from the telemetry transmitter and displays the demodulated vital signs on the display.

Here, each biometric information acquisition terminal is assigned a dedicated radio frequency channel (transmission frequency) in advance. The biometric information acquisition terminal wirelessly transmits the biometric information detected from the patient using the assigned radio frequency channel. The central monitor obtains the biometric information by demodulating the signal of the radio frequency channel transmitted from the biometric information acquisition terminal.

JP 2005-124903 A JP 2003-010138 A

In order for the central monitor to demodulate the radio frequency channel (hereinafter sometimes simply called the channel) signal transmitted from the biometric information acquisition terminal, it is necessary to register the receiving channel of the central monitor so that it matches the transmitting channel of the biometric information acquisition terminal. This registration of the receiving channel is performed by the administrator by manual input or by using a barcode reader, etc.

When manually entering data, the administrator registers the channel by looking at the channel of the biometric information acquisition terminal displayed on the label or LCD screen of the biometric information acquisition terminal and setting the channel of the central monitor to match that channel. At this time, the administrator sets the channel using the operation keys (e.g., numeric keys) provided on the central monitor.

When manually setting the receiving channel of the central monitor in this way, it is generally necessary to enter a four-digit number. If an input error occurs and the channel setting is incorrect, the central monitor will not be able to receive the vital signs sent by the intended vital signs acquisition terminal, resulting in a mix-up in which the vital signs of the intended patient cannot be monitored or the vital signs of an unintended patient are monitored.

As a result, the administrator in charge of the telemetry system within the hospital had to perform the task of setting the channels correctly for many vital sign acquisition terminals, which was time-consuming. In particular, large hospitals have more than 100 vital sign acquisition terminals, so it is very cumbersome to register the receiving channels of the central monitor to correspond to each of the vital sign acquisition terminals.

In addition to registering the channel, the administrator must also process the patient's admission before starting monitoring. The admission process is carried out by the administrator displaying the admission screen on the central monitor and entering the patient's name and other information while viewing the admission screen.

As a result, before starting monitoring of the patient's vital signs, administrators had to perform preprocessing such as launching the channel registration screen and admission screen and entering the appropriate information, which placed a significant burden on them.

The present invention has been made in consideration of the above points, and provides a vital sign monitor that can reduce the pre-processing required for monitoring by the administrator.

One embodiment of the biological information monitor of the present invention comprises:
a demodulation unit including a plurality of demodulation circuits for demodulating a plurality of pieces of biometric information transmitted from a plurality of biometric information acquisition terminals via a plurality of different radio frequency channels, each of the plurality of demodulation circuits demodulating signals of the plurality of radio frequency channels;
a field strength measuring unit for measuring a field strength of a medical telemetry band including at least the entire frequency band of the radio frequency channel demodulated by the demodulation unit;
A display unit;
A control unit;
Equipped with
The control unit is
assigning the radio frequency channel based on the electric field strength measured by the electric field strength measurement unit and performing channel registration;
and,
When the channel is registered, an admission screen for performing admission processing of the patient is displayed on the display unit;
and,
The radio frequency channel on which the channel registration has been performed is associated with the patient information input using the displayed admission screen.

According to the present invention, the administrator does not need to register channels or launch the admission screen, reducing the pre-processing required for monitoring.

FIG. 1 is a diagram showing a schematic configuration of a biological information monitoring system to which a central monitor according to an embodiment is applied. FIG. 1 is a block diagram showing a configuration of a main part of a central monitor according to an embodiment of the present invention; Block diagram showing the configuration of the receiving section An example of biological information displayed on a central monitor A diagram showing an example of a field strength display screen on a central monitor An example of the bed entry/exit screen A diagram showing an example of a conventional channel registration screen.

The following describes in detail the embodiments of the present invention with reference to the drawings.

<1> System Overview Fig. 1 is a diagram showing a schematic configuration of a biological information monitoring system to which a central monitor according to the present embodiment is applied. A biological information monitoring system 10 in Fig. 1 is installed in, for example, a hospital.

The nurse's station is equipped with a central monitor 100, which receives the biometric information of each patient wirelessly transmitted from the bedside monitors 20 (20-1 to 20-n) or biometric information acquisition terminals such as telemeter transmitters 30-1 to 30-m via antennas AN1, AN2-1, AN2-2, and AN2-3.

The antennas AN1, AN2-1, AN2-2, and AN2-3 are attached directly to the central monitor 100 or connected to the central monitor 100 by cables. Specifically, the antenna AN1 is attached directly to the central monitor 100, and the antennas AN2 (AN2-1 to AN2-3) are connected to the central monitor 100 via cables 400. The antenna AN2 is installed, for example, in the ceiling of a hospital corridor.

The configuration of antenna AN2 may be a so-called antenna system or a leaky coaxial cable system. The antenna system uses a whip antenna or the like as an antenna, and antennas AN2-1 to AN2-3 are connected by wire. The leaky coaxial cable system uses leaky coaxial cables as antennas AN2-1 to AN2-3. Antennas AN1 and AN2 may be of any system as long as they comply with the standards for specific low-power radio. Furthermore, the number of antennas is not limited to the example in Figure 1.

In practice, the biological information wirelessly transmitted from the bedside monitor 20 and the telemeter transmitter 30 (i.e., the biological information acquisition terminal) is first received by antenna AN1 or AN2. In the example of FIG. 1, the biological information transmitted from the telemeter transmitter 30-m is received by antenna AN1, and the biological information transmitted from the bedside monitors 20-1, 20-n and the telemeter transmitter 30-1 is received by the wired antenna AN2.

In this way, the vital signs wirelessly transmitted from medical terminals such as the bedside monitor 20 and the telemeter transmitter 30 are received and collected by the central monitor 100 and displayed on the central monitor 100.

<2> Configuration of Main Parts of Central Monitor FIG. 2 is a block diagram showing the configuration of main parts of the central monitor 100 according to this embodiment.

The central monitor 100 inputs the signals received by the antennas AN1 and AN2 to the receiving unit 200. The receiving unit 200 demodulates the modulated biological information by performing a predetermined wireless processing on the input signal. The receiving unit 200 also has a function of measuring the electric field strength of radio waves in the medical telemeter frequency band (420 MHz to 450 MHz). The detailed configuration of the receiving unit 200 will be described later.

Here, we will briefly explain the frequency bands for medical telemetry. According to the "Operational Regulations for Low-Power Medical Telemetry" established by the Japan Electronics and Information Technology Industries Association (JEITA), 420 to 450 MHz is specified as the frequency band to be used for medical telemetry. Furthermore, six frequency bands (which can also be called bands) 1 to 6 are allocated in the range of 420 to 450 MHz. Each of frequency bands 1 to 6 can be assigned 40, 80 or 120 channels (which can also be called "floors" or "biometric information acquisition terminals"). Incidentally, the spacing between each channel is 12.5 kHz.

The biometric information demodulated by the receiving unit 101 is input to the biometric information analysis unit 110. The biometric information analysis unit 110 forms a biometric information waveform from the biometric information and calculates maximum, minimum, average, and other values.

The output of the bioinformation analysis unit 110 is input to the display control unit 120 and the alarm control unit 130. The display control unit 120 switches the display based on an operation signal from the operation unit 180. The display control unit 120 displays bioinformation such as an electrocardiogram, SpO2, and blood pressure on the display unit 140. Furthermore, when the display control unit 120 receives an alarm output instruction signal from the alarm control unit 130, it displays an alarm on the display unit 140. Furthermore, the alarm output instruction signal from the alarm control unit 130 is also input to an alarm indicator 150 consisting of an LED (Light Emitting Diode), a speaker, etc., and the alarm is also output by light or sound.

Meanwhile, information on the electric field strength of the radio waves measured by the receiving unit 200 is output to the display control unit 120. The electric field strength information here is, for example, information in which the electric field strength is represented by a two-dimensional graph with the horizontal axis representing frequency and the vertical axis representing power (or voltage). This two-dimensional graph is displayed on the display unit 140 by the display control unit 120.

The central monitor 100 also has a control unit 170, an operation unit 180, and a barcode reader 190.

As a pre-processing step before sensing the biometric information, the control unit 170 assigns and links each biometric information acquisition terminal to a carrier frequency (which may also be called a radio frequency channel) based on the biometric information acquisition terminal identification information input from the operation unit 180 or the barcode reader 190, and outputs frequency assignment information to the receiving unit 200. Note that the control by the control unit 170 will be described in detail later.

<3> Configuration of Receiving Unit FIG. 3 is a block diagram showing the configuration of the receiving unit 200. As shown in FIG.

The receiving unit 200 inputs the signals received by each antenna AN1, AN2 to the distributor 230 via a band pass filter (BPF) 210 and an amplifier (AMP) 220.

The distributor 230 outputs the input received signal to the demodulator 240 and the field strength measurement unit 250. Here, the distributor 230 may, for example, select either the signal of antenna AN1 or the signal of antenna AN2 and output it to the demodulator 240 and the field strength measurement unit 250, or may output a combination of the signals of antenna AN1 and antenna AN2 to the demodulator 240 and the field strength measurement unit 250.

The distribution of the distributor 230 is controlled, for example, by the user operating the operation unit 180. As a result, for example, when the user wants to know the electric field strength based on the received signal of the antenna AN1, the distributor 230 outputs the received signal of the antenna AN1 to the electric field strength measurement unit 250.

The distributor 230 may also select which of the received signals from antennas A1 and AN2 to distribute to each of the demodulation circuits 1 to 12 included in the demodulation unit 240. For example, if the telemeter transmitter 30-1 in FIG. 1 is assigned to demodulation circuit 1, the signal from the telemeter transmitter 30-1 should be larger at antenna AN2 than at antenna AN1, so the distributor 230 may distribute the received signal from antenna AN2 to demodulation circuit 1.

The demodulation unit 240 has demodulation circuits (which may be called "receiving modules") for the number of beds (which may be called the "number of channels" or "number of biometric information acquisition terminals"). In the example of Figure 3, it has demodulation circuits 1 to 12 for 12 beds. Specifically, each of demodulation circuits 1 to 12 demodulates the biometric information by multiplying the input signal by a different carrier frequency. For example, demodulation circuit 1 multiplies by carrier frequency 1, demodulation circuit 2 by carrier frequency 2, ... and demodulation circuit 12 by carrier frequency 12.

The biometric information of each bed (each biometric information acquisition terminal) demodulated by the demodulation unit 240 is converted by the conversion circuit 270 into data suitable for analysis by the biometric information analysis unit 110 (Figure 2).

In addition to this configuration, the receiving unit 200 of the central monitor 100 of this embodiment has a field strength measuring unit 250 in addition to the demodulating unit 240 that demodulates the biological information. The field strength measuring unit 250 measures the field strength of the medical telemetry band that includes at least all of the demodulation frequency bands demodulated by the demodulating unit 240.

The electric field strength measurement unit 250 of this embodiment measures the electric field strength in the medical telemeter band using a sweep method. Since electric field strength measurement using the sweep method is a known technology, it will be explained briefly here. The electric field strength measurement unit 250 converts the input signal to IF (intermediate frequency) using a mixer and a local oscillator. At this time, the signal is converted to IF while the frequency of the local oscillator is automatically swept, and the power value that has passed through a narrowband IF filter is output as electric field strength information. Note that the electric field strength measurement unit 250 may measure the electric field strength information using the FFT method instead of the sweep method.

The electric field strength measuring unit 250 measures and displays the electric field strength of radio waves in the medical telemetry band, allowing the user to understand the radio wave environment of the channel to which the biometric information acquisition terminal is assigned.

The operation of distributor 230, demodulator 240, and field strength measurement unit 250 is controlled by wireless control unit 260. For example, wireless control unit 260 controls which of demodulator circuits 1 to 12 to operate based on frequency allocation information from control unit 170. For example, if carrier frequency 1 is assigned to bedside monitor 20-1, carrier frequency 2 is assigned to bedside monitor 20-n, carrier frequency 7 is assigned to telemeter transmitter 30-1, and carrier frequency 9 is assigned to telemeter transmitter 30-m, demodulator circuits 1, 2, 7, and 9 are operated.

The wireless control unit 260 also assigns a floor (which may also be called a "channel" or "biometric information acquisition terminal") to each demodulation circuit 1-12 by setting carrier frequencies 1-12 for each demodulation circuit 1-12.

<4> Display Example Fig. 4 is a diagram showing a display example of biological information displayed on the display unit 140 of the central monitor 100. Note that in the example of Fig. 4, biological information for eight beds is displayed, but according to the configuration of Fig. 3 described above, biological information for up to 12 beds can be displayed in relation to wireless reception.

Figure 5 shows an example of a received electric field strength display image displayed on the display unit 140 of the central monitor 100.

In the example of FIG. 5, a field strength measurement selection area AR1, a field strength graph area AR2, a band selection area AR3, an antenna selection area AR4, and a scan start position adjustment area AR5 are displayed. In this embodiment, the display unit 140 is configured as a touch panel, and an operation signal corresponding to a touch operation by the user is input to the control unit 170, and various controls are changed according to the operation signal.

The reception strength measurement selection area AR1 displays a "Spectrum analyzer only" button. When the "Spectrum analyzer only" button is touched, the field strength measurement unit 250 measures the field strength. In addition, buttons RF-01 to RF-12 are displayed in the reception strength measurement selection area AR1. These buttons correspond to demodulation circuits 1 to 12, and for example, when the RF-01 button is touched, the field strength is measured by demodulation circuit 1, and when the RF-02 button is touched, the field strength is measured by demodulation circuit 2.

In other words, demodulation circuits 1 to 12 have the function of demodulating the vital sign information, as well as the function of measuring the electric field strength of the medical telemeter band, similar to the electric field strength measurement unit 250. In other words, in order to demodulate the vital sign information, configurations similar to the electric field strength measurement unit 250, such as a mixer and local oscillator, are required, so demodulation circuits 1 to 12 are also able to measure the electric field strength using these configurations. However, since the present embodiment does not demodulate the vital sign information and has a field strength measurement unit 250 dedicated to measuring the electric field strength, it is possible to measure the radio wave conditions of the medical telemeter frequency band regardless of the status of the vital sign monitoring.

The electric field strength of each channel is displayed in the electric field strength graph area AR2. In the example shown, of the six bands that make up the medical telemeter band (1000s, 2000s, 3000s, 4000s, 5000s, and 6000s), the electric field strength of the 2000s band is displayed. The user can determine which band's electric field strength is to be measured and displayed by selecting the desired band in the band selection area AR3. In the example shown, the electric field strength of 120 channels is displayed in each band.

The user can select the antenna for which the field strength is to be measured by touching the antenna selection area AR4. For example, when the "Antenna 1" button is touched, the field strength of the signal received by antenna AN1 is measured and displayed, and when the "Antenna 2" button is touched, the field strength of the signal received by antenna AN2 is measured and displayed. Incidentally, it is not necessary to select any one antenna, but it is also possible to select all two or more antennas and measure and display the field strength of their combined received signal.

By touching the scan start position adjustment area AR5, the user can adjust the scan start position where the electric field strength is measured and displayed. Here, to scan the electric field strength of all channels in a band, it takes several tens of seconds, for example, depending on the performance of the device. Therefore, if the scan is simply started from the channel with the lowest frequency and the channel of interest is a channel with a high frequency, the user will have to wait a long time to find out the electric field strength around the channel of interest.

The user can avoid this inconvenience by touching the scan start position adjustment area AR5. For example, if the channel of interest is channel 2115, the user touches the "110" button in the scan start position adjustment area AR5. As a result, the field strength measurements and display scans are performed starting from channel 2110, allowing the user to quickly find out the field strength around the channel of interest, channel 2115.

<5> Channel registration and launching of admission screen by control unit 170 As a preprocessing step for sensing biological information, the control unit 170 performs channel registration by assigning radio frequency channels to demodulation circuits 1 to 12 (Figure 3) based on the electric field strength measured by the electric field strength measurement unit 250 (Figure 3).

Specifically, when registering a new telemeter transmitter to the central monitor 100, the administrator puts the telemeter transmitter into a transmitting state and brings it close to the central monitor 100. Then, the electric field strength measurement unit 250 measures a large electric field strength at the frequency corresponding to the radio frequency channel of the telemeter transmitter.

The control unit 170 registers the demodulation circuits 1 to 12 corresponding to the radio frequency channel with the strongest electric field strength among the electric field strengths of the radio frequency channels measured by the electric field strength measurement unit 250. Note that it is not necessary to register the demodulation circuits 1 to 12 corresponding to the radio frequency channel with the strongest electric field strength. For example, the channels with the strongest electric field strength may be selected as candidates, and the channel with the strongest electric field strength may be registered after removing noise components from among them.

The control unit 170 may also assign radio frequency channels to demodulation circuits 1-12, excluding those to which radio frequency channels have already been assigned, and perform channel registration based on the electric field strength measured by the electric field strength measurement unit 250. For example, if demodulation circuits 1-6 have already been assigned radio frequency channels (i.e., channels have already been registered), it is sufficient to monitor only the electric field strength of the radio frequencies corresponding to demodulation circuits 7-12, and register the one with the greatest electric field strength as a new channel. In this way, the time required for channel registration can be shortened.

The control unit 170 may also determine the validity of the channel registration by performing a check using an error detection code.

More specifically, a signal including an error detection code is transmitted from a telemeter transmitter that is about to perform new channel registration. The control unit 170 performs a check using the error detection code on signals on channels with high field strength. If there is an error, the signal is not likely to be a signal from the target telemeter transmitter, but is likely to be noise, for example, and channel registration is not performed. On the other hand, if the check is OK, it can be determined that the signal is a signal from the target telemeter transmitter. In this way, the reliability of channel registration can be increased.

Furthermore, when the control unit 170 has registered a channel as described above, it causes the display unit 140 to display an admission screen for carrying out the patient admission process. Fig. 6 is an example of the admission screen that is displayed. Note that the example in Fig. 6 is, strictly speaking, an admission/discharge screen. While viewing this admission screen, the administrator inputs patient identification information, such as the patient's name, via the operation unit 180.

In this way, by displaying the admission screen in sync with channel registration, the administrator has less screen switching to do, reducing the burden on the administrator.

The control unit 170 links the radio frequency channel for which channel registration has been performed with the patient information entered using the displayed admission screen. This links each patient with the monitored vital signs, and the information is displayed and recorded. The control unit 170 also sends the patient information, etc. to an electronic medical record system, etc.

As described above, according to this embodiment, the central monitor 100 has a plurality of demodulation circuits 1 to 12 that demodulate a plurality of pieces of bioinformation sent from a plurality of bioinformation acquisition terminals (bedside monitor 20, telemeter transmitter 30) on a plurality of different radio frequency channels, and the plurality of demodulation circuits 1 to 12 demodulate signals of a plurality of radio frequency channels, a demodulation unit 24, an electric field strength measurement unit 250 that measures the electric field strength of a medical telemeter band including at least all frequency bands of the radio frequency channels demodulated by the demodulation unit 240, a display unit 140, and a control unit 170. The control unit 170 assigns a radio frequency channel based on the electric field strength measured by the electric field strength measurement unit 250 and performs channel registration, and when the channel registration is performed, causes the display unit 140 to display an admission screen for performing a patient admission process, and links the radio frequency channel for which the channel registration is performed to the patient information entered using the displayed admission screen.

This eliminates the need for administrators to register channels and launch the admission screen, reducing the pre-processing required for monitoring.

Incidentally, in the past, a channel registration screen like that shown in FIG. 7 was displayed on the display unit 140, and the administrator had to register channels on this screen. In this embodiment, the administrator does not need to go through the troublesome channel registration process.

In addition, according to this embodiment, the central monitor 100 has a demodulation unit 240 having multiple demodulation circuits 1 to 12 that demodulate multiple pieces of biological information wirelessly transmitted from multiple biological information acquisition terminals (bedside monitor 20, telemeter transmitter 30), and an electric field strength measurement unit 250 that is provided separately from the demodulation unit 240 and measures the electric field strength of the medical telemeter band that includes at least all frequency bands demodulated by the demodulation unit 240.

As a result, the electric field strength measuring unit 250 can measure the radio wave conditions regardless of the usage status of the demodulation circuits 1 to 12 of the demodulation unit 240, making it possible to realize a central monitor 100 that can measure the radio wave conditions regardless of the monitoring status of biological information without complicating the system configuration.

Specifically, the measurement of the electric field strength by the electric field strength measuring unit 250 is performed simultaneously with the demodulation of the biological information by the demodulation unit 240. This makes it possible to measure the radio wave state without interrupting the monitoring of the biological information.

In addition, according to this embodiment, an amplifier 220 that amplifies signals from antennas AN1 and AN2 is provided before the demodulation unit 240 and the field strength measurement unit 250, and the demodulation unit 240 and the field strength measurement unit 250 share the same amplifier 220 (in other words, they input signals from the same amplifier 220). This simplifies the configuration of the part that amplifies signals when viewed as a whole system by sharing the amplifier, compared to, for example, a system in which the field strength measurement unit is provided outside the central monitor 100 and measures the field strength.

In addition, according to this embodiment, a distributor 230 that distributes signals from antennas AN1 and AN2 is provided before the demodulation unit 240 and the field strength measurement unit 250, and the demodulation unit 240 and the field strength measurement unit 250 share the same distributor 230 (in other words, they input signals from the same distributor 220). This simplifies the configuration, as there is no need to provide a separate distributor, as compared to a system in which the field strength measurement unit is provided outside the central monitor 100 to measure the field strength, for example.

Incidentally, in this embodiment, the distribution of the antenna signal by distributor 230 to demodulation unit 240 and the distribution of the antenna signal to field strength measurement unit 250 are the same. For example, when the signal of antenna AN1 is distributed to demodulation unit 240, the signal of antenna AN1 is also distributed to field strength measurement unit 250. This is because the signal of the antenna whose field strength is to be measured is meaningless unless it is the same as the signal of the antenna to be demodulated.

The above-described embodiments are merely examples of the implementation of the present invention, and the technical scope of the present invention should not be interpreted in a limiting manner based on these. In other words, the present invention can be implemented in various forms without departing from its gist or main characteristics.

In the above embodiment, the present invention has been described as being applied to a central monitor, but it is not limited to this, and in short, it can be widely applied to any biological information monitor that demodulates and displays multiple pieces of biological information wirelessly transmitted from multiple biological information acquisition terminals.

The present invention has the effect of reducing the amount of pre-processing required for monitoring by the administrator, and is suitable for use in central monitors, for example.

REFERENCE SIGNS LIST 10 Biological information monitoring system 20 (20-1 to 20-n) Bedside monitor 30 (30-1 to 30-m) Telemeter transmitter 100 Central monitor 110 Biological information analysis unit 120 Display control unit 130 Alarm control unit 140 Display unit 150 Alarm indicator 170 Control unit 180 Operation unit 190 Barcode reader 200 Receiving unit 210 Bandpass filter (BPF)
220 Amplifier (AMP)
230 distributor 240 demodulator 250 field strength measurement section 260 radio control section 270 conversion circuit AN1, AN2-1, AN2-2, AN2-3 antenna AR1 field strength measurement selection area AR2 field strength graph area AR3 band selection area AR4 antenna selection area AR5 scan start position adjustment area

Claims (4)

a demodulation unit including a plurality of demodulation circuits for demodulating a plurality of pieces of biometric information transmitted from a plurality of biometric information acquisition terminals via a plurality of different radio frequency channels, each of the plurality of demodulation circuits demodulating signals of the plurality of radio frequency channels;
a field strength measuring unit for measuring a field strength of a medical telemetry band including at least the entire frequency band of the radio frequency channel demodulated by the demodulation unit;
A display unit;
A control unit;
Equipped with
The control unit is
assigning the radio frequency channel based on the electric field strength measured by the electric field strength measurement unit and performing channel registration;
and,
When the channel is registered, an admission screen for performing admission processing of the patient is displayed on the display unit;
and,
Linking the radio frequency channel on which the channel registration has been performed with the patient information input using the displayed admission screen;
Vital sign monitor. The control unit is
performing channel registration by allocating the radio frequency channel to each of the demodulation circuits, excluding the demodulation circuits to which the radio frequency channel has already been allocated, based on the electric field strength measured by the electric field strength measurement unit;
The biological information monitor according to claim 1 . the control unit performs channel registration of a demodulation circuit corresponding to a radio frequency channel having the greatest electric field strength among the electric field strengths of the radio frequency channels measured by the electric field strength measurement unit;
3. The biological information monitor according to claim 1 or 2. The control unit determines the validity of the channel registration by performing a check using an error detection code.
The biological information monitor according to any one of claims 1 to 3.

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