JPH05161611A - Medical telemeter device - Google Patents

Abstract

PURPOSE:To provide the medical telemeter device equipped with a measuring/ analyzing function on the side of a transmitter. CONSTITUTION:This device is composed of a transmitter 1' equipped with an arithmetic part 17 to input detected organic signals, to measure/analyze those signals and to output them as counted data and analyzed data, transmission part 14 to transmit these counted and analyzed data as organic information signals together with the organic signals and power supply part 25 depending on a battery, and a receiver to receive the organic information signals transmitted from this transmitter 1' and to display/record those signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical telemeter device for inputting and transmitting biological signals.

[0002]

2. Description of the Related Art Generally, a patient monitoring device in a hospital is
Configured as a system. The source of the biomedical signal is the patient, but the receiving location is near the patient's bed (bedside), nurse center, doctor's place or recovery room, etc.
It is necessary to receive transmitted signals at these various locations at the same time. Further, in a university hospital or the like, a device for allowing a large number of students or nurses to observe the pathological condition of a patient undergoing surgery is also required. For this reason, the scale, function, etc. of the device differ depending on the place where the patient monitoring device is installed, and the device cost naturally varies accordingly. For example, at the bedside, the shape of the device is as small as possible, and it is sufficient to display measured values and waveforms for functions. Detailed display functions for alarms (warnings), recording of waveforms or trend data on recording paper, etc. Functions are rarely needed. On the other hand, in a nurse center, all information is requested comprehensively. That is, the function of regularly recording various biological signals over time becomes important, and a larger display screen is required in accordance with a large number of biological signals or a plurality of patients. Also, in the doctor's office, the alarm function is important,
A lot of display-only models are required for educational devices.

Conventionally, a patient monitoring apparatus including a wired or wireless telemeter apparatus is divided into a transmitting section for detecting a biological signal, amplifying and transmitting the biological signal, and a receiving section for displaying / recording the transmitted biological signal. It was FIG. 8 shows a conventional example by wireless transmission of such a device. 1 is a multi-phenomenon transmitter that transmits various kinds of biological signals input via electrodes or transducers 1 _T via antenna A, for example, by radio waves, 2 is input via electrodes 2 _T It is a dedicated electrocardiogram transmitter that transmits only the electrocardiogram signal from the lead wire that also serves as an antenna. Reference numeral 3 denotes a center monitor installed in a nurse center or the like, which receives a biomedical signal sent from the multi-phenomenon transmitter 1 or the electrocardiogram-dedicated transmitter 2 via an antenna 3 ₁ to obtain various measured values of a plurality of patients or The waveform and the like are displayed on the screen and can be recorded and monitored by the recording device 4. Also, 5 is a bedside monitor being arranged together with the recording device 6 in the vicinity of bed patients, to display and record the waveform and measurement data of the biological signal received by the antenna 5 _1. The center monitor 3 and the bedside monitor 5 form a receiving device in combination with the recording devices 4 and 6. Further, the center monitor 3 or the bedside monitor 5 has a built-in measuring / analyzing device,
Biological signals transmitted from the multi-phenomenon transmitter 1 or the electrocardiogram dedicated transmitter 2 are measured and analyzed, and count data and analysis data are displayed on the screen. The measurement accuracy and analysis accuracy depend on the cost of the device. In reality, it is almost decided by the analysis algorithm (program) at the time of manufacture.

[0004]

However, in the above-mentioned conventional structure, the following problems occur because the biosignals are measured and analyzed at the terminal end of the transmission path, that is, the receiver side. Depending on the frequency characteristics and dynamic range of the transmission line,
Measurement / analysis accuracy is limited. For example, in the transmission of an electrocardiogram signal, an electrocardiogram signal due to ventricular extrasystole generates a signal several times larger than a normal electrocardiogram signal, so a large dynamic range must be secured in order to accurately transmit an abnormal waveform. It is necessary, and if the dynamic range of the transmission line is not sufficient, an error may occur in the judgment in the device. Further, in the indoor propagation of radio waves, a large number of valleys of radio waves are generated due to interference of reflected waves due to radio waves, resulting in instantaneous interruption of radio waves. Therefore, the arrhythmia detection program may detect an arrhythmia by mistake. When the same signal source is simultaneously displayed / recorded by a plurality of devices such as a bedside monitor and a center monitor, a difference occurs in the result due to a difference between measurement and analysis parts. This is like a bedside monitor and a center monitor,
This is because the difference may occur due to the difference in the model and the improvement in the circuit configuration or the analysis program. Also, for the same reason, even in the same model, there is a difference between the new model and the old model. Therefore, it may cause confusion in the medical field such as a hospital. Further, even if the device only needs to monitor and record only the measured value, it is necessary to have a built-in measurement and analysis function, and the device becomes expensive accordingly. The present invention has been made in view of the above points, and an object of the present invention is to provide a telemeter transmitting / receiving device in which the above disadvantages are eliminated by providing a transmitter with a measurement / analysis function.

[0005]

As shown in FIG. 1, for example, the present invention comprises a transmitter for detecting and transmitting a biological signal, and a receiving device for receiving the biological signal transmitted from this transmitter. In the telemeter device, the detected biomedical signals are inputted, predetermined arithmetic operations are performed, and arithmetic operation units 17 and 44 for outputting as count data and analysis data, and these count and analysis data are sent out as biometric information signals together with biometric signals. Transmitters 14 and 41 and power supply unit 25 using a battery
And transmitters 1 ', 2'comprising
The receiving device (3 ', 4 and 5', 6) for receiving, displaying and recording the biological information signal transmitted from the device. It is also possible to use a biological signal to be transmitted as an electrocardiographic waveform signal and transmit this electrocardiographic waveform signal together with heart rate and arrhythmia data. Further, the biological signal to be transmitted may be a respiratory waveform signal, and this respiratory waveform signal may be transmitted together with the respiratory rate. Furthermore, the biological signal to be transmitted may be an open blood pressure waveform signal, and this open blood pressure waveform signal may be transmitted together with the blood pressure value.

[0006]

With the above structure, the transmitter side is provided with the function of measuring and analyzing the detected biomedical signal, the count data and the analytical data are obtained by the calculation, and are transmitted together with the biometric signal. As well as
The receiver side is simplified and the cost of the entire system can be reduced.

[0007]

EXAMPLES Examples of the present invention will be described below with reference to FIGS.
Will be explained. In addition, in the portion corresponding to the conventional example of FIG.
The same reference numerals are given and the description is omitted. 1 is according to the invention,
1 illustrates an embodiment of a multi-phenomenon transmitter. 10 is various
Inputs biological signals such as electrocardiogram, blood pressure, pulse wave, etc.
It is a first input amplifier group that amplifies and amplifies. 11 is the first
An analog multiplexer is used to input the above multiple living organisms.
Circular sampling of the signal and related signals
It is sent as a biometric information signal to the transmission unit 14 described later.
12 has a gentler change than the first amplifier group 10.
Biological signals, such as impedance breathing signals, exhaled gas
Signal (CO ₂), A second input for inputting the oxygen saturation signal, etc.
It is a group of force amplifiers. 13 is the second analog multiplex
And its scan terminal is the first analog multiplexer 1
1 connected to one of the input terminals and
Second input amplifier with 1/8 cycle
Biological signals output from the group 12 and the computing unit 1 described below
Sampling the counting / analysis data output from 7
Output.

FIG. 2 shows the first and second analog multiplexers.
It is explanatory drawing which shows the operation relationship of the lexers 11 and 13.
First input amplifier group 10 and second input amplifier group 12
The biological signals output by₁, A₂・ ・
... a₆And b₁, B₂... b_FiveAnd Also,
To the top input terminal of one analog multiplexer 11
Is a timing signal T indicating a frame delimiter_MAdded
It is obtained. In addition, the second analog multiplexer 1
The first input terminal of 3 has the first analog multiplex
Timing signal T of service 11_MSynchronized to, sync timing
Signal T_SIs being applied. Both of these timing signals
Issue T_MAnd T_SIs the control logic 24 described later
Is supplied. The first analog multiplexer 11 is
Repeated cyclic sampling (scanning) of 8 inputs described above
Do it. In the first frame, the
Imming signal T_M, Input signal a₁, A₂・ ・ ・ ・ ・ A₆as well as
Synchronous timing output from the second multiplexer 13
Signal T_SIs output, and in the next frame,
The timing signal T_M, Input signal a₁, A₂・ ・ ・ ・ ・ A
₆And b₁Is output, and the same scanning is repeated thereafter,
In the last frame, the timing signal T _M,
Input signal a₁, A₂・ ・ ・ ・ ・ A₆And analysis data is output.
And go back to the first frame. Thus, the second Ana
The output of the log multiplexer 13 is immediate for each frame.
Then, once every 8 times, the first analog multiple
It is output from the comb 11.

The above-mentioned transmitter 14 is modulated by the output of the first analog multiplexer 11, for example, a modulator 15 for PWM (pulse width modulation) modulation, the output of this modulator 15, and further by, for example, FM modulation. The modulation / amplification unit 16 and the modulation / amplification unit 1 for amplifying high-frequency power
It is composed of an antenna 16a for transmitting the output of 6 as a radio wave. Since the output of the first analog multiplexer 11 is a time division signal, the modulator 15 is suitable for this signal, such as PPM (pulse position modulation) or PCM (pulse code modulation), in addition to PWM modulation. May be modulated.

Reference numeral 17 denotes an arithmetic unit, which is composed of, for example, a one-chip computer such as a microcomputer, and has a third analog multiplexer 18, an A / D converter 19, and a CP.
It has a U (central processing unit) 20, a RAM (random access memory) 21, a ROM (read only memory) 22 and an input / output port 23. The RAM 21 temporarily stores a biometric information signal, various set values, or data read from the ROM 22, and the ROM 22 holds a predetermined analysis program or the like in advance. The input terminal of the third analog multiplexer 18 is connected to the output side of the first input amplifier group 10, each input terminal of the first analog multiplexer 11 and two input terminals of the second analog multiplexer 13. The third analog multiplexer 18 includes the first and second analog multiplexers 11.
Regardless of 13 and 13, the input biological signal is cyclically sampled and sent to the A / D converter 19 via the scanning terminal. The biological signal is converted into a digital signal by the A / D converter 19 and taken in as a biological information signal. CPU
The 20 receives the biometric information signal, performs a predetermined calculation, obtains count data and analysis data, and sends the count and analysis data through the input / output port 23. The transmitted counting and analysis data are applied to the two input terminals of the second analog multiplexer 13.

The control logic 24 described above includes the first and second analog multiplexers 11 and 13.
To the timing signal T _M and the synchronization timing signal T, respectively.
Supplying _S and first analog multiplexer 1
1. Second analog multiplexer 13 and modulator 15
To control. The control by the control logic 24 may be performed by the CPU 20 described above.
Reference numeral 25 denotes a power supply unit, which is composed of, for example, a battery and supplies a current or a voltage to the entire transmitter.

FIGS. 3 and 4 show examples of the count data sequence and the analysis data sequence in the transmission data of the embodiment shown in FIG. In FIG. 3, in the count data string, a start bit is arranged at the beginning of the data, and the next phenomenon data section assigns numerical values to different biological phenomena, such as 1 for an electrocardiogram and 2 for a breath. Correspond and assign.
The count data section following the phenomenon data section is, for example, the heart rate in the case of an electrocardiogram, and the respiratory rate in the case of respiration. In the next phenomenon data and count data portion, numbers and numerical values corresponding to other biological phenomena are arranged. The checksum part is arranged in the middle of the data string and is inserted to prevent data transfer error. Similarly, numbers and numerical values corresponding to a predetermined biological phenomenon are arranged, and a stop bit indicating the end of the data is arranged at the end to delimit the transmission data.

FIG. 4 shows an analysis data sequence. For example, a case of a data sequence in which arrhythmia occurs frequently and blood pressure abnormality occurs will be described. Similar to the count data string in FIG. 3,
First, the start bit indicating the start of data is arranged,
Time data indicating the time when the analysis is performed is arranged in the next time part. In the next phenomenon portion, the phenomenon name such as blood pressure, the alarm bit portion, for example, when a predetermined blood pressure value is exceeded, an abnormal blood pressure value for generating an alarm signal is arranged,
In the next phenomenon part, for example, an electrocardiogram is arranged as a phenomenon name. Further, for example, a code indicating the type of arrhythmia is arranged in the next analysis result portion, and the checksum portion is for preventing data transfer error similar to the above-mentioned count data string. Finally, a stop bit indicating the end of data is arranged.

As shown in FIGS. 3 and 4, the series of counting and analysis data strings are transmitted from the transmitting unit 14 (FIG. 1), and the receiving device side (center monitor 3'or bedside shown in FIG. 7 is shown. Received by the monitor 5'and the recording device 4, 6), the patient is monitored.

Next, the operation of the above embodiment will be described. The biological signal is input to the first multiplexer 11 via the input amplifier group 10, and is also input to the third analog multiplexer 18 of the arithmetic unit 17. After converting the biomedical signal captured by the calculation unit 17 into a digital signal,
The analysis program stored in the RAM 21 and stored in the ROM 22 in advance performs a predetermined calculation to calculate the count and the analysis data. These count and analysis data are sent to the two input terminals of the second analog multiplexer 13 via the input / output port 23, sequentially scanned, and added to one input terminal of the first analog multiplexer 11. This first analog multiplexer 11
Inputs a biometric information signal such as a biometric signal, count and analysis data, sequentially scans, and outputs to the modulation unit 15 of the transmission unit 14 as a time division signal. The modulator 15 modulates, for example, a PWM-modulated modulation signal based on the input biological information signal.
Output to the amplification unit 16. Further, in this modulation / amplification unit 16, after the FM modulation, the high frequency power is amplified and the antenna 1
It is transmitted as a radio wave from 6a. By doing so, along with the biological signal such as a waveform, the count and analysis data based on this biological signal is transmitted as a biological information signal. As shown in FIG. 7, the transmitted biological information signal is received by the patient's bedside monitor 5'or the nurse center monitor 3 ', and the biological signal waveform, count and analysis data are appropriately combined and displayed on the screen. It is displayed or recorded on recording paper by the recording devices 4 and 6.

FIG. 5 shows another embodiment, which is an example applied to a transmitter dedicated to an electrocardiogram. In such a configuration, the calculation unit 44 is the same as the calculation unit 17 in FIG. Further, since it is dedicated to the electrocardiogram signal, the three analog multiplexers 11, 13, 18 and the control logic 24 shown in the embodiment of FIG. 1 are unnecessary. In FIG. 5, when the electrocardiogram signal (electrocardiogram waveform) is simply transmitted, the electrocardiogram signal is taken in through the electrocardiogram amplifier 40, and the first subcarrier modulation section 42 uses the electrocardiogram signal to
For example, the primary FM modulation is performed, the secondary FM modulation is further performed by the modulation / amplification unit 43, the high frequency power is amplified, and the high frequency power is transmitted as a radio wave from the antenna 43a. This is an FM-FM type modulation method that has been used conventionally. When transmitting the measurement / analysis data of the electrocardiogram signal, the biological signal amplified by the electrocardiographic amplifier 40 is taken into the calculation unit 44, converted into the electrocardiographic data by the A / D converter 45, and together with the related data, the biological information. RAM48 as a signal
Memorized in. The CPU 46, in accordance with, for example, an electrocardiogram analysis program stored in the ROM 49 in advance,
The electrocardiogram data in the RAM 48 is read out and a predetermined calculation is performed to calculate, for example, heart rate, arrhythmia, etc., and analysis data, which is output to the second subcarrier modulator 50 via the input / output port 47.

The second subcarrier modulator 50 is, for example,
It uses a binary FSK (frequency shift keying) and voltage control.
Consists of an oscillator consisting of an oscillator and a multivibrator
Frequency f₁And f₂Of two signals. this
Frequency f of these signals₁And f ₂Is the first subcarrier
Lower than the subcarrier frequency fa of the modulator 42, and
The frequency is selected by the separation filter during demodulation.
It For example, the frequency fa of the subcarrier is 1.5 kHz
And the frequency f of the two signals₁And f₂600H each
Z and 500Hz. By selecting in this way
Effectively use radio waves without expanding the bandwidth of the radio waves.
Rukoto can. Living body output from the input / output port 47
The information signal is H / L (high level or low level) 2
Since it is a digital value, the second subcarrier modulator
At 50, the frequency f of the two signals₁And f₂Corresponding to
And converted respectively, that is, subcarriers as binary FSK
Is output together with. This output is the first subcarrier
It is mixed with the output (fa) of the adjustment section 42 and is modulated / amplified by the modulation / amplification section 43.
In this mixed signal,
High frequency power is amplified and transmitted through the antenna 43a.
To be done. On the receiving side, a filter (not shown)
Sub-carrier and frequency f₁And f₂Is separated into signals
Are demodulated. The subcarrier modulator 50 is a binary FSK.
We used MSK (Minimum phaseShift Keing
 ) May be used. In addition, the modulation method is
Used by the loose modulation method, that is, PWM, PPM or PCM
It goes without saying that you can do it.

In the other embodiment described above, the status generator 51 generates, for example, the same electrode disconnection signal, low battery signal or nurse call signal as in the conventional case, and the CPU 46 via the input / output port 47. , Is mixed with the biological information signal and is output from the second subcarrier modulator 50.

FIG. 6 shows a count data string to be transmitted in another embodiment shown in FIG. For example, the head part is a start bit indicating the start of data, in order, the status signal described above, the data indicating the heart rate, the arrhythmia type part corresponds to the detected and classified arrhythmia, for example, as a predetermined numerical code. Further, the time data indicating the measurement time and the stop bits indicating the data division are arranged and sequentially transmitted.

In another embodiment shown in FIG. 5 above,
Although it was configured as an ECG-only transmitter, for example, in the case of measurement related to respiration, the respiratory waveform signal and respiratory rate are simultaneously transmitted, or in the case of measurement related to open blood pressure, the invasive blood pressure waveform signal and blood pressure. It can be configured as a dedicated transmitter for each biosignal so that the values are transmitted simultaneously.

FIG. 7 shows a schematic use example of the telemeter device of the present invention. Electrodes or transducers 1
A plurality of biomedical signals input via _T are transmitted from the multi-phenomenon transmitter 1'as biometric information signals. Alternatively, the electrocardiogram dedicated transmitter 2'transmits the electrocardiogram signal input via the electrodes 2 _T as a biometric information signal. The transmitted biometric information signal is received by the center monitor 3'or bedside monitor 5 ', the waveform and data of the biometric signal are displayed on the screen, or recorded by the recording device 4 or 6.

As described above, the measuring / analyzing apparatus can be constructed in a small size by the one-chip computer, so that it can be easily installed in the transmitter side and the installation space is small. Therefore, the transmitter has the same size as the conventional one. Can be maintained. Further, the center monitor and the bedside monitor as the receiver can omit the measuring / analyzing device, so that the monitor function can be simplified as compared with the conventional one.

In the above embodiment, the one-chip computer is used as the arithmetic unit. However, when only count data is required, it can be constructed by combining with a logic IC (logic integrated circuit). It can be used properly with a one-chip computer depending on the type. Further, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.

[0024]

As described above, according to the present invention, the transmitter side is provided with the measurement and analysis unit for biological signals, and the counting and analysis data is obtained. Therefore, the following remarkable effects are obtained. can get. Since the measurement / analysis device is close to the signal source, the influence of the deterioration of the transmission signal due to the characteristics of the transmission line is eliminated. Since only the analysis result needs to be transmitted as needed, narrow band transmission is possible, and in particular, since the frequency band is limited in wireless transmission, effective utilization of radio wave resources is promoted. When received and recorded at a plurality of places or devices, there is no difference in display value between the devices. Since the measuring / analyzing device is not required on the receiving device side, the monitor function is simplified and the overall system cost can be reduced. When changing the signal analysis program, only the measurement / analysis part on the transmitter side needs to be changed, so that the entire system can be easily updated.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a multi-phenomenon transmitter in a medical telemeter device of the present invention.

FIG. 2 is a diagram for explaining the operational relationship between the first and second analog multiplexers in the embodiment of FIG.

FIG. 3 is a diagram showing a configuration of a count data string in the embodiment of FIG.

FIG. 4 is a diagram showing a configuration of an analysis data string in the embodiment of FIG.

FIG. 5 is a block diagram showing an embodiment of an electrocardiogram dedicated transmitter in the medical telemeter device of the present invention.

FIG. 6 is a diagram showing a configuration of a count data string in the embodiment of FIG.

FIG. 7 is a diagram showing a schematic use example of the present embodiment.

FIG. 8 is a diagram showing a schematic usage example of a conventional example.

[Explanation of Codes] 1'Multi-Phenomenon Transmitter 2'Electrocardiogram Transmitter 3'Center Monitor 4,6 Recording Device 5'Bedside Monitor 11, 13, 18 First, Second, Third Analog Multiplexer 14, 41 Transmission Part 17, 44 Arithmetic part 24 Control logic 25 Power supply part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location A61B 5/04 R 8119-4C 5/08 8932-4C

Claims (4)

[Claims] 1. A transmitter for detecting and transmitting a biological signal,
In a medical telemeter device configured with a receiving device that receives a biological signal transmitted from this transmitter, the detected biological signal is input to perform a predetermined calculation,
An arithmetic unit that outputs as count data and analysis data, and
The transmitter having a transmitter for transmitting the count and analysis data together with the biomedical signal as a biometric information signal and a power source unit by a battery, and receiving and displaying / recording the biometric information signal transmitted from the transmitter. A medical telemeter device comprising the above receiving device. 2. The medical telemeter device according to claim 1, wherein the biological signal is an electrocardiographic waveform signal, and the electrocardiographic waveform signal is transmitted together with heart rate and arrhythmia data. 3. The medical telemeter device according to claim 1, wherein the biological signal is a respiratory waveform signal and the respiratory waveform signal is transmitted together with the respiratory rate. 4. The medical telemeter device according to claim 1, wherein the biological signal is an open blood pressure waveform signal, and the open blood pressure waveform signal is transmitted together with a blood pressure value.