U.S. patent application number 11/020204 was filed with the patent office on 2005-06-02 for biological signal detection apparatus holter electrocardiograph and communication system of biological signals.
This patent application is currently assigned to NIHON KOHDEN CORPORATION. Invention is credited to Hosaka, Hidehiro, Matsumura, Fumiyuki, Ono, Kohei, Sakata, Hiroshi, Sekiguchi, Tetsushi, Suda, Shin.
Application Number | 20050119582 11/020204 |
Document ID | / |
Family ID | 39937598 |
Filed Date | 2005-06-02 |
United States Patent
Application |
20050119582 |
Kind Code |
A1 |
Matsumura, Fumiyuki ; et
al. |
June 2, 2005 |
Biological signal detection apparatus holter electrocardiograph and
communication system of biological signals
Abstract
An electrode 4 for detecting a biological signal and a loop
antenna 3 are integrally mounted on a support 2 placed on the
surface of a living body and a transmitter 5 is placed on the
support 2. A biological signal detected on the electrode 4 is input
through a connector 11 to electric circuitry 10 of the transmitter
5 and an electric signal processed by the electric circuitry 10 is
output through connectors 12 and 13 to both ends of the loop
antenna 3 from which the biological signal is emitted to a
receiver. At this time, the opening face of the loop antenna 3 is
in a direction almost perpendicular to the surface of a living body
for improving sensitivity.
Inventors: |
Matsumura, Fumiyuki; (Tokyo,
JP) ; Sekiguchi, Tetsushi; (Tokyo, JP) ;
Sakata, Hiroshi; (Tokyo, JP) ; Hosaka, Hidehiro;
(Saitama, JP) ; Suda, Shin; (Tokyo, JP) ;
Ono, Kohei; (Tokyo, JP) |
Correspondence
Address: |
SUGHRUE MION, PLLC
2100 PENNSYLVANIA AVENUE, N.W.
SUITE 800
WASHINGTON
DC
20037
US
|
Assignee: |
NIHON KOHDEN CORPORATION
|
Family ID: |
39937598 |
Appl. No.: |
11/020204 |
Filed: |
December 27, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11020204 |
Dec 27, 2004 |
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09659605 |
Sep 11, 2000 |
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6856832 |
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09659605 |
Sep 11, 2000 |
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09220751 |
Dec 28, 1998 |
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6161036 |
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Current U.S.
Class: |
600/509 |
Current CPC
Class: |
Y10S 128/903 20130101;
A61B 5/332 20210101; A61B 2560/0475 20130101; A61B 5/282 20210101;
A61B 5/0006 20130101; A61B 2560/0412 20130101; A61B 5/276 20210101;
A61B 2560/045 20130101; A61B 5/0008 20130101; A61B 5/335
20210101 |
Class at
Publication: |
600/509 |
International
Class: |
A61B 005/0402 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 25, 1997 |
JP |
P.HEI.9-358536 |
Dec 26, 1997 |
JP |
P.HEI.9-359933 |
Sep 9, 1999 |
JP |
P HEI. 11-255483 |
Sep 13, 1999 |
JP |
P HEI. 11-258906 |
Claims
1-17. (canceled)
18. A biological signal detection system comprising: a first
electrode group for detecting a biological signal; a first support,
attached to the living tissue, for supporting said first electrode
group; a second electrode group for detecting a biological signal;
a second support, attached to the living tissue surface, for
supporting said second electrode group; and a transmitter
including: an electric circuit for processing the signals detected
by said first and second electrode groups; a first connection
section for electrically connecting said first electrode group to
said transmitter and fixing said transmitter directly onto said
first support and a second connection section for electrically
connecting signal lines from said second electrode group to said
transmitter; storage means for storing the signals processed by
said electric circuit; an external transmission signal comprising
instructions; and a first transmitter-receiver for telemetering the
signals processed by said electric circuit and the signals stored
in said storage means and receiving an external transmission
signal, said transmitter-receiver telemeters some or all of the
signals stored in said storage means or the signal processed by
said electric circuit based on said instructions received from said
external transmission signal.
Description
[0001] This is a Continuation-In-Part application of Ser. No.
09/220,751 filed on Dec. 28, 1998
BACKGROUND OF INVENTION
[0002] 1. Field of Invention
[0003] This invention relates to a biological signal detection
apparatus and in particular to a biological signal detection
apparatus applicable to a medical telemetry system wherein a
biological signal detected by an electrode attached to the living
tissue surface of a patient can be appropriately processed and the
provided signal can be telemetered by a transmitter and can be
received at a remotely located monitor for monitoring the disease
condition of the patient, and a Holter electrocardiograph
incorporating the biological signal detection apparatus.
[0004] Further, this invention relates to a communication system of
detection data, etc., provided by detecting biological signals and
in particular to a communication system for transmitting and
receiving biological signals detected by a Holter
electrocardiograph.
[0005] 2. Related Art
[0006] To care for a seriously ill patient directly linked to his
or her life as in an ICU (intensive care unit) or a CCU (coronary
care unit), biological information needs to be continuously
monitored to precisely keep track of the conditions of the patient.
Thus, it is important to provide information necessary for
treatment conducted at the bedside of the patient using a bedside
monitor placed at the bedside of the patient. It is also important
to find out an anomaly of the patient promptly and issue an alarm
and send data provided from the biological information of the
patient to a central monitor placed in a nurse station, a doctor
room, etc.
[0007] From the viewpoint, hitherto, to collect necessary data and
display the data on monitors placed on the periphery to provide
biological information of a patient in moving the patient in
emergency, at the bedside of the patient in a hospital, etc., a
medical telemetry system of transmitting and receiving wireless
signals has been used simply and efficiently to input signals
detected by a biological signal detection apparatus made up of
various sensor electrodes, etc., attached to the living tissue
surfaces of the patient.
[0008] Hitherto, as a biological signal measuring apparatus of
converting a biological signal of a patient, etc., into telemetry
(cordless) and measuring, a biological signal measuring apparatus
has been proposed (Japanese Utility Model Registration No.2558836),
the biological signal measuring apparatus comprising a sensor
section made up of three electrode parts for detecting a biological
signal, a transmission section for transmitting the biological
signal detected by each electrode part of the sensor section to an
external reception section, and a power supply section for
supplying power to the transmission section, wherein the
transmission section has the power supply section integrally and
can be directly attached and detached by being fitted to any one of
the three electrode parts, wherein three contacts corresponding to
signal lines from the three electrode parts form contacts made
flush with each other, wherein the biological signals detected by
the three electrode parts are input to the transmission section,
and wherein the electrode parts are made disposable and the
transmission section can be recycled.
[0009] That is, in the biological signal measuring apparatus
according to the proposition, the transmission section containing
the power supply section is made integral with any one of the three
electrode parts and the biological signals detected by the
electrode parts are input to the transmission section, whereby the
constraint feeling of the patient is improved remarkably and no
signal cable exists between the transmission section and the sensor
section, thus extra connection points are excluded and therefore
stable measuring can be conducted over a long time and the
reliability is enhanced.
[0010] A Holter electrocardiograph apparatus that can improve the
convenience of a communication interface with a computer for
analyzing, storing, and arranging data by providing an already
existing portable Holter electrocardiograph apparatus with an
infrared communication apparatus for inputting electrocardiogram
data to a computer in noncontact for storing and analyzing the data
simply or by transmitting electrocardiogram data sampled from a
patient and compressed to a remotely located computer for storing
and analyzing the data using a public telemetry network applied to
portable telephones, portable information terminals, etc., has been
proposed (JP-A-9-224917).
[0011] That is, this Holter electrocardiograph apparatus according
to the proposition is characterized by the fact that an already
existing portable Holter electrocardiograph apparatus comprises an
infrared communication apparatus as means for inputting highly
compressed data stored in memory to an external machine, and the
infrared communication apparatus comprises means for communicating
according to a predetermined procedure for a computer and inputting
monitored electrocardiogram data to the computer in noncontact at
high speed. Further, the Holter electrocardiograph apparatus can be
configured to use a public telemetry network applied to portable
telephones and portable information terminals to transmit highly
compressed electrocardiogram data to a remotely located computer
for storing and analyzing the data.
[0012] A portable electrocardiogram monitor for monitoring a
plurality of electrocardiogram signals led by the electrode
attached to the chest of a patient by a monitor circuit carried by
the patient and telemetering arrhythmia information detected in the
electrocardiogram signals to an emergency medical institution for
receiving rescue of diagnosis, instruction for the patient, first
aid to be given to the patient, etc., by the expert
(JP-A-10-234688).
[0013] That is, the portable electrocardiogram monitor according to
the proposition comprises chest side circuitry attached to the
chest of a patient and waist side circuitry attached to the waist
of the patient. The chest side circuitry has addition means for
adding electrocardiogram signals of a plurality of channels and
intra-monitor transmission means for telemetering the added
electrocardiogram signal provided by the addition means from the
chest to the waist and the waist side circuitry has reception means
for receiving the transmission signal of the intra-monitor
transmission means, arrhythmia detection means for detecting severe
arrhythmia that is unignorable in the added electrocardiogram
signal received by the reception means, and external transmission
means for telemetering information indicating occurrence of
arrhythmia together with the identification signal of the patient
to an emergency medical institution.
[0014] However, in the biological signal measuring apparatus
according to the proposition, if the transmission section having
the three electrode parts inputs the biological signal detected by
each electrode part and transmits the signal to the outside and is
applied as a Holter electrocardiograph, the method of the electrode
positioning for providing electrocardiogram data, namely, the
position leading electrode-to-electrode potential does not match
the position of the electrode that can be led properly and
efficiently as a Holter electrocardiograph, thus simple and prompt
electrocardiogram data cannot be provided.
[0015] In the Holter electrocardiograph apparatus according to the
proposition, an already existing portable Holter electrocardiograph
apparatus is provided with an infrared communication apparatus,
whereby electrocardiogram data is transmitted to a personal
computer or a remotely located computer in non-contact for smoothly
storing and analyzing the data and the existing portable Holter
electrocardiograph apparatus itself is not improved or modified.
Thus, for example, improvement or prevention means for occurrence
of inconvenience or discomfort when the electrodes are attached to
the patient or occurrence of a malfunction caused by detachment of
the electrode is not considered at all. Further, the Holter
electrocardiograph apparatus assumes only that the patient sends
electrocardiogram data to a medical institution, and the patient
must perform the operation of transmitting electrocardiogram data
consciously; the operation is burdensome for the patient.
[0016] In the portable electrocardiogram monitor according to the
proposition, the arrhythmia detection means is attached to the
patient, severe arrhythmia that is unignorable is determined by
hardware or software analysis means, and electrocardiogram
information at the time is sent. Thus, the information is
insufficient for the doctor to finally diagnose the conditions of
the patient. If determination of the arrhythmia detection means
attached to the patient is only made, when erroneous detection
occurs, it is feared that a serial problem that may be developed to
a lawsuit against the doctor (for example, electrocardiogram
information is not transmitted although the patient is in an
actually critical condition) may occur.
[0017] Further, in the apparatus according to the propositions, the
fact that it is made possible to telemeter biological signals of a
patient to a remotely located monitor is disclosed or suggested,
but the configuration of a medical telemetry system for making it
possible to smoothly and simply exchange information between the
patient and the monitor is not specifically proposed at all.
[0018] As a result of repeating research and trials assiduously,
the inventor et al have found out that a communication system of
detection data, etc., provided by detecting a biological signal,
which can construct a medical telemetry system that can prevent
detachment of an electrode from causing a malfunction to occur and
can smoothly and simply exchange information between a patient and
a monitor can be provided, the communication system adopting the
configuration comprising a Holter electrocardiograph comprising a
biological signal detection apparatus comprising a plurality of
electrodes for detecting a biological signal, supports being
attached to the living tissue surface of a patient for supporting
the electrodes, and a transmitter for processing the signal
detected by the electrode and telemetering the detected signal, a
receiver for receiving the signal telemetered from the transmitter
of the biological signal detection apparatus and demodulating the
received signal, the receiver comprising a terminal for outputting
the demodulated signal to a biological signal input section of
required record means, and a recorder comprising record means for
recording the demodulated signal output from the terminal of the
receiver, wherein the recorder of the Holter electrocardiograph
comprises transmitting and receiving means for telemetering the
signal stored in the record means, receiving an external
transmission signal, and telemetering some or all of the signals
stored in the record means as instructed by the external
transmission signal, and a biological signal input apparatus
comprising transmitting and receiving means for inputting signals
and transmitting and receiving communication information to and
from the transmitting and receiving means of the recorder of the
Holter electrocardiograph through a relay transmitter-receiver and
a wide area network is provided.
SUMMARY OF INVENTION
[0019] It is therefore an object of the invention to provide a
biological signal detection apparatus that can construct a medical
telemetry system that can eliminate inconvenience or discomfort
when the electrodes are attached to a patient and can prevent
detachment of an electrode from causing a malfunction to occur and
smoothly and simply exchange information between a patient and a
monitor.
[0020] It is another object of the invention to provide an
easy-to-handle Holter electrocardiograph which enables the user to
properly and promptly monitor electrocardiogram data of a patient
by applying such a biological signal detection apparatus.
[0021] It is therefore another object of the invention to provide a
communication system of biological signals that can construct a
medical telemetry system that can prevent detachment of an
electrode from causing a malfunction to occur and can smoothly and
simply exchange information between a patient and a monitor.
[0022] To the end, according to the invention, there is provided a
biological signal detection apparatus comprising a first electrode
group for detecting a biological signal, a first support being
attached to the living tissue surface of a patient for supporting
the first electrode group, a second electrode group for detecting a
biological signal, a second support being attached to the living
tissue surface for supporting the second electrode group, and a
transmitter comprising an electric circuit for processing the
signals detected by the first and second electrode groups and
telemetering the detected signals, characterized in that the
transmitter comprises a first connection section for electrically
connecting the first electrode group to the transmitter and fixing
the transmitter directly onto the first support and a second
connection section for electrically connecting signal lines from
the second electrode group to the transmitter.
[0023] In this case, a biological signal potential difference
between at least one electrode in the first electrode group and at
least one electrode in the second electrode group can be measured
(CM5 lead and/or NASA lead).
[0024] A potential difference between at least one pair of
electrodes in the second electrode group can be measured (CC5
lead).
[0025] In the biological signal detection apparatus, the electric
circuit for telemetering the detected signals comprises:
[0026] a connection section detachment detection section for
determining whether or not the second electrode group is connected
in the second connection section; and
[0027] a switch section for measuring the biological signal
potential difference between at least one pair of electrodes in the
first electrode group if the connection section detachment
detection section determines that the second electrode group is not
connected in the second connection section and measuring the
biological signal potential difference between at least one
electrode in the first electrode group and at least one electrode
in the second electrode group is measured (CM5 lead and/or NASA
lead) if the connection section detachment detection section
determines that the second electrode group is connected in the
second connection section.
[0028] As an alternative, according to the invention, there is
provided a biological signal detection apparatus comprising a first
electrode group for detecting a biological signal, a first support
being attached to the living tissue surface of a patient for
supporting the first electrode group, a second electrode group for
detecting a biological signal, a second support being attached to
the living tissue surface for supporting the second electrode
group, and an electric circuit for processing the signals detected
by the first and second electrode groups, wherein the electric
circuit can comprise a first connection section for electrically
connecting the first electrode group to the electric circuit and
fixing the electric circuit directly onto the first support and a
second connection section for electrically connecting signal lines
from the second electrode group to the electric circuit, and
wherein detachable storage means being contained in a housing for
storing the signals processed by the electric circuit can be
provided.
[0029] According to the invention, there is provided a biological
signal detection apparatus comprising a first electrode group for
detecting a biological signal, a first support being attached to
the living tissue surface of a patient for supporting the first
electrode group, a second electrode group for detecting a
biological signal, a second support being attached to the living
tissue surface for supporting the second electrode group, an
electric circuit for processing the signals detected by the first
and second electrode groups, storage means for storing the signals
processed by the electric circuit, and a transmitter-receiver for
telemetering the signals processed by the electric circuit and the
signals stored in the storage means and receiving an external
transmission signal, wherein the transmitter-receiver can telemeter
some or all of the signals stored in the storage means or the
signal processed by the electric circuit as instructed by the
external transmission signal.
[0030] A Holter electrocardiograph provided by applying a
biological signal detection apparatus according to the invention
comprises:
[0031] a biological signal detection apparatus comprising a first
electrode group for detecting a biological signal, a first support
being attached to the living tissue surface of a patient for
supporting the first electrode group, a second electrode group for
detecting a biological signal, a second support being attached to
the living tissue surface for supporting the second electrode
group, and a transmitter comprising an electric circuit for
processing the signals detected by the first and second electrode
groups and telemetering the detected signals, the transmitter
comprising a first connection section for electrically connecting
the first electrode group to the transmitter and fixing the
transmitter directly onto the first support and a second connection
section for electrically connecting signal lines from the second
electrode group to the transmitter;
[0032] a receiver for receiving the signal telemetered from the
transmitter of the biological signal detection apparatus and
demodulating the received signal, the receiver comprising a
terminal for outputting the demodulated signal to a biological
signal input section of required record mean; and
[0033] a recorder comprising record means for recording the
demodulated signal output from the terminal of the receiver.
[0034] To the end, according to the invention, there is provided a
communication system of biological signals, comprising a Holter
electrocardiograph comprising a biological signal detection
apparatus comprising a plurality of electrodes for detecting a
biological signal, supports being attached to the living tissue
surface of a patient for supporting the electrodes, and a
transmitter for processing the signal detected by the electrode and
telemetering the detected signal, a receiver for receiving the
signal telemetered from the transmitter of the biological signal
detection apparatus and demodulating the received signal, the
receiver comprising a terminal for outputting the demodulated
signal to, a biological signal input section of required record
means, and a recorder comprising record means for recording the
demodulated signal output from the terminal of the receiver,
characterized in that the recorder of the Holter electrocardiograph
comprises transmitting and receiving means for telemetering the
signal stored in the record means, receiving an external
transmission signal, and telemetering some or all of the signals
stored in the record means as instructed by the external
transmission signal, and characterized by a biological signal input
apparatus comprising transmitting and receiving means for inputting
signals and transmitting and receiving communication information to
and from the transmitting and receiving means of the recorder of
the Holter electrocardiograph through a relay transmitter-receiver
and a wide area network.
[0035] As an alternative, according to the invention, there is
provided a communication system of biological signals, comprising a
Holter electrocardiograph comprising a biological signal detection
apparatus comprising a plurality of electrodes for detecting a
biological signal, supports being attached to the living tissue
surface of a patient for supporting the electrodes, an electric
circuit for processing the signal detected by the electrode,
storage means for storing the signal processed by the electric
circuit, and a transmitter-receiver for telemetering the signal
processed by the electric circuit and the signal stored in the
storage means and telemetering some or all of the signals stored in
the storage means or the signal processed by the electric circuit
as instructed by an external transmission signal, wherein a
biological signal input apparatus comprising transmitting and
receiving means for inputting signals and transmitting and
receiving communication information to and from the
transmitter-receiver of the Holter electrocardiograph through a
relay transmitter-receiver and a wide area network is provided.
[0036] In the communication system, the relay transmitter-receiver
can transmit and receive the communication information between the
transmitting and receiving means or the transmitter-receiver placed
in the recorder of the Holter electrocardiograph and the wide area
network, and
[0037] the wide area network can be adapted to transmit and receive
the communication information between the relay
transmitter-receiver and the transmitting and receiving means of
the biological signal input-apparatus.
[0038] In the communication system, the biological signal input
apparatus can comprise:
[0039] input data instruction means for indicating data to be input
among the signals stored in the record means placed in the recorder
of the Holter electrocardiograph or stored in the storage means
placed in the transmitter-receiver;
[0040] instruction information transmission means for transmitting
instruction information specified by the input data instruction
means to the record means placed in the recorder of the Holter
electrocardiograph or the storage means placed in the
transmitter-receiver via the wide area network and the relay
transmitter-receiver;
[0041] input reception means for receiving the signal transmitted
based on the instruction information from the transmitting and
receiving means or the transmitter-receiver placed in the recorder
of the Holter electrocardiograph via the relay transmitter-receiver
and the wide area network; and
[0042] input storage means for storing the signal received by the
input reception means.
[0043] The communication system can further include:
[0044] non-reception signal generation means for generating a
non-reception signal while a radio signal transmitted from the
transmitter or the transmitter-receiver of the biological signal
detection apparatus cannot be received in the Holter
electrocardiograph; and
[0045] record means for recording the non-reception signal
generated by the non-reception signal generation means.
[0046] The communication system can further include:
[0047] electrode detachment signal generation means for recognizing
detachment of one of the electrodes from the living tissue surface
by a radio signal transmitted from the transmitter or the
transmitter-receiver of the biological signal detection apparatus
in the Holter electrocardiograph and generating an electrode
detachment signal while the electrode is detached; and
[0048] record means for recording the electrode detachment signal
generated by the electrode detachment signal generation means.
[0049] Further, according to the present invention, there is
provided that a biological signal detection system comprising:
[0050] electrodes for detecting a biological signal;
[0051] supports, attached to the living tissue, for supporting said
electrodes;
[0052] a transmitter including:
[0053] an electric circuit for processing the signals detected by
said electrodes;
[0054] storage means for storing the signals processed by said
electric circuit; and a transmitter-receiver for telemetering the
signals processed by said electric circuit and the signals stored
in said storage means and receiving an external transmission
signal, said transmitter-receiver telementers some or all of the
signals stored in said storage means or the signal processed by
said electric circuit as instructed by the external transmission
signal.
BRIEF DESCRIPTION OF THE DRAWINGS
[0055] In the accompanying drawings:
[0056] FIG. 1 is a schematic representation to show one embodiment
of a basic system configuration of a communication system of
biological signals according to the invention;
[0057] FIG. 2(a) is a schematic perspective view to show the
separation state of main components of biological signal detection
apparatus for detecting a biological signal shown in FIG. 1;
[0058] FIG. 2(b) is a schematic perspective view to show a modified
example of the main components of the biological signal detection
apparatus shown in FIG. 2(a);
[0059] FIG. 3(a) is a schematic block diagram to show a
configuration example in the joint state of the biological signal
detection apparatus shown in FIG. 2;
[0060] FIG. 3(b) is a schematic representation to show an
application example of the biological signal detection apparatus
shown in FIG. 3(a) as a Holter electrocardiograph;
[0061] FIG. 4 is a schematic block diagram to show a configuration
example of a receiver of a Holter electrocardiograph applied to a
communication system of biological signals according to the
invention;
[0062] FIG. 5 is a schematic block diagram to show a configuration
example of a recorder and a transmitter-receiver of the Holter
electrocardiograph applied to the communication system of
biological signals according to the invention;
[0063] FIG. 6 is a schematic block diagram to show a configuration
example of a relay transmitter-receiver for relaying and
transmitting/receiving detection data, etc., applied to the
communication system of biological signals according to the
invention;
[0064] FIG. 7 is a schematic block diagram to show a configuration
example of a biological signal input apparatus for receiving and
recording detection data, etc., and transmitting instruction
information, applied to the communication system of biological
signals according to the invention;
[0065] FIG. 8 is a schematic representation to show one embodiment
of a flow of data and information in the communication system of
biological signals according to the invention;
[0066] FIG. 9 is a flowchart to describe the operation of the
communication system according to the invention shown in FIG.
8;
[0067] FIG. 10 is a schematic representation to show another
embodiment of a flow of data and information in communication
system of biological signals according to the invention;
[0068] FIG. 11(a) is a schematic block diagram to show a
configuration example of a biological signal detection apparatus
applied to the communication system according to the invention
shown in FIG. 10;
[0069] FIG. 11(b) is a schematic representation to show another
application example of the biological signal detection apparatus
according to the invention as a Holter electrocardiograph
[0070] FIG. 12 is a flowchart to describe the basic operation of
the communication system according to the invention shown in FIG.
10;
[0071] FIG. 13 is a flowchart to describe another operation of the
communication system according to the invention shown in FIG.
10;
[0072] FIG. 14 is a block diagram to describe the operation in an
electrode detachment detection state in the communication system of
biological signals according to the invention; and --FIG. 15 is a
block diagram to describe the operation in a connection section
detachment detection state in the communication system of
biological signals according to the invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0073] Referring now to the accompanying drawings, there are shown
preferred embodiments of communication system of biological signals
according to the invention.
[0074] Basic system configuration for communicating detected data
provided by detecting biological signal
[0075] FIG. 1 is a schematic representation to show a Holter
electrocardiograph attached to the body surface of a patient PB for
recording electrocardiogram data and a schematic configuration of a
communication system for inputting the electrocardiogram data to a
remotely located central monitor, etc. In FIG. 1, the Holter
electrocardiograph comprises a transmitter 10 attached to the body
surface of the patient PB for detecting and telemetering a
biological signal (electrocardiogram signal), a receiver 14 for
receiving and demodulating the signal telemetered from the
transmitter 10, and a recorder 16 made up of various record means
for recording the signal (electrocardiogram signal) received and
modulated by the receiver 14. The receiver 14 and the recorder 16
are connected by wire and are attached to parts of the body of the
patient PB via a belt 18, etc.
[0076] As the communication system with the Holter
electrocardiograph, the recorder 16 is provided with transmitting
and receiving means 17 for transmitting and receiving signals to
and from the outside and the transmitting and receiving means 17 is
connected to a biological signal input apparatus implemented as a
personal computer PC, etc., via relay transmitting and receiving
means 19 such as a portable telephone using a wide area
network.
[0077] The transmitter 10 will be discussed also with reference to
FIG. 2(a). A first electrode group 20 for detecting a biological
signal of the patient PB and a first support 22 attached to the
living tissue surface of the patient for supporting the first
electrode group 20 can be joined detachably and a second electrode
group 24 for detecting a biological signal of the patient PB and
second supports 26a to 26e attached to the living tissue surface of
the patient PB for supporting the second electrode group 24 can be
joined detachably.
[0078] That is, as joining of the transmitter 10 and the first
support 22 and the second supports 26a to 26e, the first support 22
comprises on the inner side, electrodes Ed1 (-) and Ed2 (-) for
positioning at symmetrical positions on the upper end of the
sternum of the patient PB as an adhesive pad 23 directly attached
to the living tissue surface, namely, the body surface (skin).
Connection terminals 21a and 21b electrically connected to the
electrodes Ed1 (-) and Ed2 (-) are placed on the outer side of the
first support 22 implemented as the adhesive pad 23. The
transmitter 10 is provided with first connection sections 11 that
can be joined to the connection terminals 21a and 21b placed on the
first support 22, so that the transmitter 10 can be placed directly
on the top face of the first support 22 for connection thereof.
[0079] The second supports 26a to 26e are implemented as adhesive
pads for supporting the second electrode group 24, namely,
electrodes Ed1 (+) and Ed3 (+) at the fifth lib position on the
left anterior axillary line of the patient PB, electrodes Ed2 (+)
and Ed3 (-) at the fifth lib position on the right anterior
axillary line of the patient PB, and an electrode EdN on the right
lowest lib of the patient PB. Further, the second electrode group
24 is connected to a connection connector 28 via leads 25a, 25b,
25c, 25d, and 25e. The transmitter 10 is provided with a second
connection section 12 that can be joined to the connection
connector 28, so that the transmitter 10 can be detachably
connected to the second electrode group 24 supported by the second
supports 26a to 26ee via the connection connector 28 and the leads
25a to 25e.
[0080] The electrodes Ed1 (-) and Ed1 (+) denote CM5 lead
electrodes, Ed2 (-) and Ed2 (+) denote NASA lead electrodes, Ed3
(-) and Ed3 (+) denote CC5 lead electrodes, and EdN denotes a
ground electrode. The electrodes can adopt conventionally known
body surface electrodes that can be attached directly to the body
surface (skin) of the patient PB and are filled with paste made of
electrolyte for stably maintaining the space between the skin and
each electrode.
[0081] As a modification of the embodiment shown in FIG. 2(a) as
specific joining of the transmitter 10 and the first support 22 and
the second supports 26a to 26e, as shown in FIG. 2(b), the
transmitter 10 can comprise a first connection section consisting
of side clips 13 symmetrically on both sides so as to join to the
connection terminals 21a and 21b placed on the first support 22. In
this case, each side clip 13 can comprise a clip part 13a1, 13b1 at
one end and a knob part 13a2, 13b2 at an opposite end so that the
connection terminals 21a and 21b placed on the first support 22 can
be detachably joined to the clip parts 13a1 and 13b1 by operating
the knob parts 13a2 and 13b2. Other components are identical with
those previously described with reference to FIG. 2(a) and are
denoted by the same reference numerals in FIG. 2(a) and will not be
discussed again in detail.
[0082] Next, embodiments concerning the detailed configuration of
the transmitter 10 in the biological signal detection apparatus for
detecting a biological signal and the communication system which
records detected data (electrocardiogram data) and is
communicatably connected to the biological signal input apparatus
PC implemented as a personal computer, etc., remotely located using
a wide area network for inputting the recorded electrocardiogram
data to the biological signal input apparatus PC will be
discussed.
First Embodiment
[0083] FIG. 3(a) shows an embodiment of a transmitter of a
biological signal detection apparatus for detecting a biological
signal according to the invention. That is, the embodiment is
applied to the Holter electrocardiograph shown in FIG. 1, and the
circuit configuration of a transmitter 10 of biological signal
detection apparatus with a receiver 14 and a recorder 16 attached
to the body of a patient PB for use is shown. Components identical
with those previously described with reference to FIGS. 1 and 2(a)
and (b) are denoted by the same reference numerals in FIG. 3(a) and
will not be discussed again in detail.
[0084] (1) Configuration of Transmitter as Biological Signal
Detection Apparatus
[0085] The transmitter 10 as the biological signal detection
apparatus shown in FIG. 3(a) is connected to a first electrode
group 20 via first connection section 11 and is connected to a
second electrode group 24 via a second connection section 12. The
transmitter 10 comprises CM5 lead differential amplifiers AMP1a,
AMP1b, and AMP1c, NASA lead differential amplifiers AMP2a, AMP2b,
and AMP2c, and CC5 lead differential amplifiers AMP3a, AMP3b, and
AMP3c connected to CM5 lead electrodes Ed1 (-) and Ed1 (+), NASA
lead electrodes Ed2 (-) and Ed2 (+), and CC5 lead electrodes Ed3
(-) and Ed3 (+) set in the first electrode group 20 and the second
electrode group 24. A ground electrode EdN is grounded. Output
signals of the differential amplifiers AMP1c, AMP2c, and AMP3c at
the last stages of the differential amplifiers are input to an A/D
(analog-digital) conversion section 32.
[0086] On the other hand, a CM5 lead electrode detachment detector
30A, a NASA lead electrode detachment detector 30B, and a CC5 lead
electrode detachment detector 30C are placed in connection circuits
of the differential amplifiers, and a connection section detachment
detection section 31 is provided for the second connection section
12. Each of the electrode detachment detectors 30A, 30B, and 30C
detects an electrode detachment state from the living tissue of the
patient PB for each of the electrodes Ed1 (+), Ed3 (+), Ed2 (+),
and Ed3 (-) in the second electrode group 24 connected to the
second connection section 12, and outputs a detection signal.
[0087] The detection signals thus provided by the electrode
detachment detectors 30A, 30B, and 30C are input to a time division
multiplexing section 33 together with output of the A/D conversion
section 32. For a detection signal of the connection section
detachment detection section 31, the switch connection operation
(described later) is performed for a switch section SW placed
between the connection circuits of the differential amplifiers
AMP1b and AMP1c and AMP2a and AMP2c on the first connection section
11 side, whereby the potential difference between the electrodes
Ed1 (-1) and Ed2 (-) in the first electrode group 20 is detected.
Numeral 38 denotes a power supply for supplying power to the
sections of the electric circuit.
[0088] Further, a real-time biological signal (electrocardiogram
data) of the patient PB provided by the time division multiplexing
section 33 is modulated by a modulation section 34 together with
each electrode detachment detection signal and a connection section
detachment signal whenever necessary, and the modulation result is
telemetered through a transmission section 35 from a transmission
antenna 36 to the outside. The antenna 36 is wired via a capacitor
to at least one of terminals connected to leads of the electrodes
in the second electrode group 24, for example, the terminal
connected to the lead 25a in the transmitter 10, whereby the lead
25a, one of the leads in the second electrode group 24 can be used
as an antenna.
[0089] As described above, the signal telemetered from the
transmitter 10 of the biological signal detection apparatus is
recorded in the record section 16 through the receiver 14 attached
to the body of the patient PB, as shown in FIG. 3(b). The record
section 16 is connected to a personal computer PC, whereby the
electrocardiogram data recorded in the record section 16 can be
input to the personal computer PC.
[0090] (2) Configuration of Receiver 14 as Holter
Electrocardiograph
[0091] In the embodiment, the receiver 14 and the recorder 16 for
receiving and recording an electrocardiogram signal transmitted
from the transmitter 10 are configured as shown in FIGS. 4 and 5
respectively.
[0092] First, in FIG. 4, the receiver 14 is provided with a
reception section 50 and a demodulation section 51 through a
reception antenna 39. A radio wave cutoff detector 52 for detecting
a radio wave cutoff from the transmitter 10 is connected to the
reception section 50 and an electrode detachment detection section
53 for detecting an electrode detachment state signal transmitted
from the transmitter 10 is connected to the demodulation section
51. A waveform generation section 54 forms required waveforms of
detection signals provided by the radio wave cutoff detector 52 and
the electrode detachment detection section 53.
[0093] On the other hand, the electrocardiogram signal provided by
the demodulation section 51 is appropriately divided and input
through D/A (digital-analog) converters 55a to 55c to amplitude
adjustment sections 56a to 56c, which then make amplitude
adjustment. The electrocardiogram signal thus undergoing the
amplitude adjustment is sent via a switch 57 and an
imbalance-to-balance converter 58 to an output section connector 60
for connection to an input section connector 61 of the recorder 16
described later so that the electrocardiogram signal and the signal
whose waveform is formed accompanying the detection state in the
radio wave cutoff detector 52 and the electrode detachment
detection section 53 can be output selectively. Numeral 59 denotes
a power supply section for supplying power to the sections making
up the receiver 14.
[0094] (3) Configuration of Recorder 16 and Transmitter-Receiver 17
as Holter Electrocardiograph
[0095] Next, in FIG. 5, in the recorder 16, differential
amplification sections 62a to 62c are connected via the input
section connector 61 and differentially amplified signals are input
through an A/D (analog-digital) conversion section 63 to a CPU
(central processing unit) 64 for system control. A call button
switch 65, a display section 66, and a data storage section 67 are
connected to the CPU 64 and a transmitting and receiving section 70
is also connected via a signal conversion section 68 to the CPU 64.
Numeral 69 denotes a power supply section for supplying power to
the sections making up the recorder 16. Numeral 71 denotes a
transmitting and receiving antenna connected to the transmitting
and receiving section 70. For example, the transmitting and
receiving antenna 71 is placed as a part of a transmitter-receiver
17 for enabling connection to a wide area network to transmit and
receive data and instruction information to and from remotely
located biological signal input apparatus PC directly or via a
relay transmitter-receiver 19 such as a portable telephone (see
FIG. 1).
[0096] (4) Configuration of Relay Transmitter-Receiver 19 in
Communication System
[0097] Then, FIG. 6 shows the configuration of the relay
transmitter-receiver 19 such as a portable telephone for
communicating electrocardiogram data recorded in the data storage
section 67 of the recorder 16 to the remotely located biological
signal input apparatus PC via the wide area network.
[0098] That is, in FIG. 6, in the relay transmitter-receiver 19, a
transmitting and receiving section 73 and a signal conversion
section 74 are connected via a transmitting and receiving antenna
72 connected by telemetering to the transmitting and receiving
antenna 71 of the transmitter-receiver 17 (see FIG. 5) placed on
the recorder 16. The signal conversion section 74 is connected to a
main controller 75. The main controller 75 is connected to a data
storage section 76, a communication information storage section 77,
and a key input unit 78. Further, the main controller 75 and the
data storage section 76 are connected to a channel codec 80, and a
voice output system consisting of a voice decoder 81, a D/A
converter 82, and a speaker 83 and a voice input system consisting
of a microphone 84, an A/D converter 85, and a voice coder 86 are
placed for inputting and outputting voice from and to the outside
through the channel codec 80.
[0099] The channel codec 80 is connected to a transmitting and
receiving section 89 via a modulation section 87 and a demodulation
section 88 and further the transmitting and receiving section 89 is
connected switchably to a transmission antenna 91a and a reception
antenna 91b via a switch 90 controlled by a signal from the main
controller 75. The transmission antenna 91a and the reception
antenna 91b are joined to the wide area network connected to the
remotely located biological signal input apparatus PC. Numeral 79
denotes a power supply section for supplying power to the sections
making up the relay transmitter-receiver 19.
[0100] (5) Configuration of Biological Signal Input Apparatus PC in
Communication System
[0101] FIG. 7 shows the configuration of the biological signal
input apparatus PC implemented as a personal computer, etc., that
can communicate electrocardiogram data recorded in the data storage
section 67 of the recorder 16 by connecting the transmitting and
receiving antenna 71 of the transmitter-receiver 17 (see FIG. 5) of
the recorder 16 and the remotely located biological signal input
apparatus PC directly or with the relay transmitter-receiver 19 of
a portable telephone, etc., (see FIG. 6) through the wide area
network.
[0102] That is, in FIG. 7, in the biological signal input apparatus
PC, a transmitting and receiving section 93 and a signal converter
94 are connected via a transmitting and receiving antenna 92 for
directly connecting by telemetering to the transmitter-receiver 17
(see FIG. 5) of the recorder 16. The signal converter 94 is
connected to a CPU 95 for system control. The CPU 95 is connected
to a data storage section 96, a display section 97, a database 98,
a data analysis program 100, and a keyboard 101. Numeral 99 denotes
a power supply section for supplying power to the sections making
up the biological signal input apparatus PC. An intranet connection
section 102 is provided for the system control CPU 95 of the
biological signal input apparatus PC and the biological signal
input apparatus PC is connected through the intranet connection
section 102 to the transmission antenna 91a and the reception
antenna 91b (see FIG. 6) of the relay transmitter-receiver 19 of a
portable telephone, etc., (see FIG. 6) by the wide area
network.
[0103] (6) General System Configuration and Operation Flow of
Communication System
[0104] Therefore, the general system configuration of the
communication system in the embodiment can be provided as shown in
FIG. 8. In this case, an operation flow can be set as shown in FIG.
9.
[0105] That is, according the communication system configuration
shown in FIG. 8, the electrocardiogram data recorded in the
recorder 16 of the Holter electrocardiograph can be communicated
with the biological signal input apparatus PC about inputting the
electrocardiogram data etc. together with instruction information
(message information) over the wide area network through the
transmitter-receiver 17 of the Holter electrocardiograph and the
relay transmitter-receiver 19.
[0106] In this case, in the operation flow, as shown in FIG. 9, in
the Holter electrocardiograph, a biological signal
(electrocardiogram data) is detected and transmitted in the
transmitter 10 of the biological signal detection apparatus at step
S1. Next, in the receiver 14, the detection signal transmitted from
the transmitter 10 is received at step S2 and is recorded as
electrocardiogram data in the data storage section 67 of the
recorder 16 at step S3. Then, in the biological signal input
apparatus PC, the ID (identification label) of the patient is input
at step S4, next instruction information (message) is added at step
S5 and a data input request instruction is given at step S6. The
data input request instruction thus given is transmitted to the
Holter electrocardiograph via the wide area network (relay
transmitter-receiver 19). In this case, in the relay
transmitter-receiver 19, the ID is checked for validity at step S7
and if the ID is valid, the contents of the instruction information
are displayed on the recorder 16 of the Holter electrocardiograph
at step S8, the required electrocardiogram data recorded in the
data storage section 67 is read at step S9 and is transmitted to
the biological signal input apparatus PC over the wide area network
(relay transmitter-receiver 19) through the transmitter-receiver 17
consisting of the transmitting and receiving section 70 and the
transmitting and receiving antenna 71 at step S10. At this time,
the ID of the patient is added to the electrocardiogram data at
step S11 and is checked for validity in the biological signal input
apparatus PC at step S12. If the ID is valid, the data is analyzed
by the data analysis program 100 and is recorded in the data
storage section 96 at step S13. If the patient PB to whom the
Holter electrocardiograph is attached makes a request for
conversation with a doctor on the biological signal input apparatus
PC side, the patient can operate the call button switch 65 of the
recorder 16, so that they can converse with each other using the
wide area network.
Second Embodiment
[0107] FIG. 10 shows another embodiment of transmitter of
biological signal detection apparatus for detecting a biological
signal according to the invention. That is, in the embodiment, a
data storage section and a transmitting and receiving section are
contained in the transmitter of the biological signal detection
apparatus in the first embodiment to form a transmitter-receiver
10A, and as a communication system, the transmitter-receiver 10A is
communicatably connected to a biological signal input apparatus PC
implemented as a remotely located personal computer, etc., directly
or via a relay transmitter-receiver 19 of a portable telephone,
etc., using a wide area network, whereby electrocardiogram data
recorded in the data storage section is input to the biological
signal input apparatus PC. Of course, as shown in FIG. 10, the
transmitter-receiver 10A is communicatably connected to the
biological signal input apparatus PC via a receiver 160 to input
electrocardiogram data recorded in the data storage section to the
biological signal input apparatus PC.
[0108] (1) Configuration of Transmitter-Receiver as Biological
Signal Detection Apparatus
[0109] Therefore, the transmitter-receiver 10A as the biological
signal detection apparatus in the embodiment can adopt the circuit
configuration as shown in FIG. 11. Components identical with those
previously described with reference to FIG. 3 are denoted by the
same reference numerals in FIG. 11 and will not be discussed again
in detail.
[0110] That is, in FIG. 11(a), in the embodiment, a CPU40 is
provided in place of the time division multiplexing section 33 in
the first embodiment. In the CPU 40, based on time data 41 and an
operation program set in a memory section 42 consisting of ROM and
RAM, detection signals of electrode detachment detectors 30A, 30B,
and 30C and output of an A/D converter 32 are input and required
electrocardiogram data is input to and recorded in a data storage
section 43. The data signal recorded in the data storage section 43
is modulated by a modulation section 44 and is telemetered to the
outside via a transmitting and receiving section 46 and a
transmitting and receiving antenna 47 and a signal received from
the outside via the transmitting and receiving antenna 47 and the
transmitting and receiving section 46 is demodulated by a
demodulation section 45 and is input to the CPU 46. Further, as
shown in FIG. 11(b), detachable storage means 44' such as a memory
card is placed in the data storage section of the
transmitter-receiver 10A and is connected to a personal computer
PC, whereby electrocardiogram data recorded in the storage means
44' could input to the personal computer PC.
[0111] Using the biological signal detection apparatus of the
embodiment described above, the transmitter-receiver 10A of the
biological signal detection apparatus is connected to a remotely
located personal computer PC over a wide area network of telephone
lines, etc., via the relay transmitter-receiver such as a portable
telephone, whereby electrocardiogram data and instruction
information of conversation, etc., can be transferred between a
patient and a doctor.
[0112] (2) Configuration of Relay Transmitter-Receiver 19 and
Biological Signal Input Apparatus PC in Communication System
[0113] In the embodiment, the electrocardiogram data detected and
recorded in the transmitter-receiver 10A of the biological signal
detection apparatus is communicated with the remotely located
biological signal input apparatus PC over the wide area network
directly by the transmitter-receiver 10A or via the relay
transmitter-receiver 19 of a portable telephone, etc., not via the
receiver 14, the recorder 16, or the transmitter-receiver 17 as the
Holter electrocardiograph in the first embodiment, whereby the
electrocardiogram data and instruction information of conversation,
etc., can be transferred between a patient and a doctor. Therefore,
in the embodiment, the receiver 14 (see FIG. 4), the recorder 16,
and the transmitter-receiver 17 (see FIG. 5) as the Holter
electrocardiograph can be omitted. In the embodiment, the relay
transmitter-receiver 19 (see FIG. 6) and the biological signal
input apparatus PC (see FIG. 7) described in the first embodiment
can be used as they area.
[0114] With the relay transmitter-receiver 19 (see FIG. 6) used in
the second embodiment, data or instruction information transferred
to and from a transmitting and receiving section 73 via a
transmitting and receiving antenna 72 is transferred to and from
the transmitting and receiving antenna 47 of the
transmitter-receiver 10A as the biological signal detection
apparatus shown in FIG. 11. Likewise, with the biological signal
input apparatus PC (see FIG. 7) used in the embodiment, data or
instruction information transferred to and from a transmitting and
receiving section 93 via a transmitting and receiving antenna 92 is
also transferred to and from the transmitting and receiving antenna
47 of the transmitter-receiver 10A as the biological signal
detection apparatus shown in FIG. 11.
[0115] (3) General System Configuration and Operation Flow of
Communication System
[0116] The general system configuration of the communication system
in the embodiment can be provided as shown in FIG. 10. In this
case, an operation flow can be set as shown in FIGS. 12 and 13.
[0117] That is, according the communication system configuration
shown in FIG. 10, as the basic operation, the electrocardiogram
data recorded in the data storage section 43 of the
transmitter-receiver 10A in the biological signal detection
apparatus as the Holter electrocardiograph can be communicated with
the biological signal input apparatus PC about inputting the
cardiogram data etc. together with instruction information (message
information) over the wide area network through the
transmitter-receiver 10A and the relay transmitter-receiver 19.
[0118] If the patient PB to whom the Holter electrocardiograph is
attached requests a doctor on the biological signal input apparatus
PC side to disclose information concerning the data analysis
result, etc., a portable information terminal 104 is communicatably
connected to the relay transmitter-receiver 19 connected to the
wide area network, whereby communications with the biological
signal input apparatus PC can be conducted.
[0119] Then, in the basic operation flow of the communication
system in the embodiment, as shown in FIG. 12, in the Holter
electrocardiograph, a biological signal (electrocardiogram data) is
detected in the transmitter-receiver 10A of the biological signal
detection apparatus at step S20 and is recorded as
electrocardiogram data in the data storage section 67 at step S21.
Then, in the biological signal input apparatus PC, the ID
(identification label) of the patient is input at step S22, next
instruction information (message) is added at step S23 and a data
input request instruction is given at step S24. The data input
request instruction thus given is transmitted to the Holter
electrocardiograph via the wide area network (relay
transmitter-receiver 19). In this case, in the relay
transmitter-receiver 19, the ID is checked for validity at step S25
and if the ID is valid, the contents of the instruction information
are displayed on the relay transmitter-receiver 19 at step S26, the
required electrocardiogram data recorded in the data storage
section 67 of the transmitter-receiver 10A is read at step S27 and
is transmitted to the biological signal input apparatus PC over the
wide area network (relay transmitter-receiver 19) through the
transmitting and receiving section 46 and the transmitting and
receiving antenna 47 at step S28. At this time, the ID of the
patient is added to the electrocardiogram data at step S29 and is
checked for validity in the biological signal input apparatus PC at
step S30. If the ID is valid, the data is analyzed by a data
analysis program 100 and is recorded in a data storage section 96
at step S31. If the patient PB to whom the Holter
electrocardiograph is attached makes a request for conversation
with a doctor on the biological signal input apparatus PC side, the
patient can operate the relay transmitter-receiver 19 of the
recorder 16, so that they can converse with each other using the
wide area network.
[0120] If the patient PB to whom the Holter electrocardiograph is
attached requests the doctor on the biological signal input
apparatus PC side to disclose information concerning the data
analysis result, etc., the operation flow is as follows: As shown
in FIG. 13, first in the biological signal input apparatus PC,
record data is input based on a data request signal and the
analysis result of the record data is prepared and is stored in a
database 98 at step S40. Then, in the portable information terminal
104, the ID (identification label) of the patient is input at step
S41, next a request for sending the data analysis result is made at
step S42. The request for sending the data analysis result is
transmitted to the biological signal input apparatus PC via the
wide area network (relay transmitter-receiver 19). In this case, in
the relay transmitter-receiver 19, the ID is checked for validity
at step S43 and if the ID is valid, the ID is added at step S44 and
is checked for validity in the biological signal input apparatus PC
at step S45 and the required analysis result stored in the database
is input at step S46 and is transmitted with the ID added over the
wide area network (relay transmitter-receiver 19) to the portable
information terminal 104 at steps S47 and S48. In this case, in the
relay transmitter-receiver 19, the ID is checked for validity at
step S49 and if the ID is valid, the ID is added at step S50 and is
received at the portable information terminal 104. Also in the
portable information terminal 104, the ID is checked for validity
at step S51 and if the ID is valid, the received data analysis
result can be displayed on a display section of the portable
information terminal 104 at step S52.
[0121] Next, in the second connection section 12 in the biological
signal detection apparatus adopting the configuration described
above, the operation of the connection section detachment detector
31 and the switch SW and the biological signal detection operation
in a normal connection state will be discussed with reference to
FIG. 14 and the operation of the connection section detachment
detector 31 and the switch SW and the biological signal detection
operation in a connection section detachment state will be
discussed with reference to FIG. 15. Components identical with
those previously described with reference to FIGS. 3 and 11 are
denoted by the same reference numerals in FIGS. 14 an 15 and will
not be discussed again in detail.
[0122] Operation in Normal Connection State
[0123] When the first connection section 11 and the second
connection section 12 and the transmitter 10 are in the normal
connection state, the contacts of the switch SW are placed in a
connection state, as shown in FIG. 14. That is, the differential
amplifiers AMP1b and AMP1c (CM5 lead) are placed in a connection
state and the differential amplifiers AMP2a and AMP2c (NASA lead)
are placed in a connection state. Consequently, the CM5 lead
differential amplifiers AMP1a, AMP1b, and AMP1c, the NASA lead
differential amplifiers AMP2a, AMP2b, and AMP2c, and the CC5 lead
differential amplifiers AMP3a, AMP3b, and AMP3c are properly
brought into conduction unless electrode detachment is not detected
in the electrode detachment detector 30A, 30B, or 30C, whereby
required biological signal can be provided in the A/D conversion
section 32.
[0124] Operation in Connection Section Detachment State
[0125] When a connection section detachment state is entered in the
second connection section 12 and the transmitter 10 as shown in
FIG. 15, the connection section detachment detector 31 detects this
state and switches the contacts of the switch SW in connection.
That is, the differential amplifiers AMP1b and AMP1c (CM5 lead) are
disconnected and the connection of the differential amplifiers
AMP2a and AMP2c (NASA lead) is switched to connection of the
differential amplifiers AMP2a and AMP1c and a part of the input
side connection circuit of the differential amplifier AMP2a is
grounded. Consequently, the potential difference between the
electrodes Ed1 (-) and Ed2 (-) in the first electrode group 20 can
be provided in the A/D conversion section 32. That is, an
electrocardiogram waveform sufficient for detecting a heart rate
can be provided by measuring the potential difference.
[0126] Although the invention has been described in its preferred
embodiments, it is understood that the invention is not limited to
the specific embodiments thereof and, for example, the
configurations of the supports of the electrodes of the biological
signal detection apparatus shown in FIGS. 2 and 3 and the
configuration and placement of the connection sections can be
changed in design in various manners and other configurations can
also be changed in design in various manners without departing from
the spirit and the scope of the invention.
[0127] As seen from the described configuration, according to the
apparatus of the invention, the first electrode group is supported
collectively on a single support, whereby the number of attached
electrodes can be decreased and the attachment work is facilitated.
That is, according to the invention, one-touch attachment is
enabled and the attachment speed can be increased. Thus, in the
apparatus of the invention, a simple electrocardiogram waveform can
be measured and moreover the potential difference between the
electrodes by CM5 lead, etc., can be measured simply by fitting an
electrocardiograph electrode code into the second connection
section for the second electrode group without changing electrode
attachment. For example, in the apparatus of the invention, for a
patient requiring a first aid, first a simple electrocardiogram is
measured by the transmitter comprising the first electrode group
and the transmitter in one piece, then if the conditions of the
patient become calm and a long-term or accurate electrocardiogram
waveform (CM5 lead) becomes necessary, an electrocardiogram
waveform can be easily led simply by connecting the second
electrode group to the second connection section without changing
electrode attachment.
[0128] As seen from the described embodiments, the biological
signal detection apparatus according to the invention comprises a
first electrode group for detecting a biological signal, a first
support being attached to the living tissue surface of a patient
for supporting the first electrode group, a second electrode group
for detecting a biological signal, a second support being attached
to the living tissue surface for supporting the second electrode
group, and a transmitter comprising an electric circuit for
processing the signals detected by the first and second electrode
groups and telemetering the detected signals, the transmitter
comprising a first connection section for electrically connecting
the first electrode group to the transmitter and fixing the
transmitter directly onto the first support and a second connection
section for electrically connecting signal lines from the second
electrode group to the transmitter. Thus, a large number of
excellent advantages can be provided such that a medical telemetry
system that can eliminate inconvenience or discomfort when the
electrodes are attached to a patient and can prevent detachment of
an electrode from causing a malfunction to occur and smoothly and
simply exchange information between a patient and a monitor can be
constructed. The described biological signal detection apparatus
according to the invention can be applied to easily provide an
easy-to-handle Holter electrocardiograph which enables the user to
properly and promptly monitor electrocardiogram data of a
patient.
[0129] As seen from the described embodiments, the communication
system of biological signals according to the invention comprises a
Holter electrocardiograph comprising a biological signal detection
apparatus comprising a plurality of electrodes for detecting a
biological signal, supports being attached to the living tissue
surface of a patient for supporting the electrodes, and a
transmitter for processing the signal detected by the electrode and
telemetering the detected signal, a receiver for receiving the
signal telemetered from the transmitter of the biological signal
detection apparatus and demodulating the received signal, the
receiver comprising a terminal for outputting the demodulated
signal to a biological signal input section of required record
means, and a recorder comprising record means for recording the
demodulated signal output from the terminal of the receiver,
wherein the recorder of the Holter electrocardiograph comprises
transmitting and receiving means for telemetering the signal stored
in the record means, receiving an external transmission signal, and
telemetering some or all of the signals stored in the record means
as instructed by the external transmission signal, and a biological
signal input apparatus comprising transmitting and receiving means
for inputting signals and transmitting and receiving communication
information to and from the transmitting and receiving means of the
recorder of the Holter electrocardiograph through a relay
transmitter-receiver and a wide area network is provided. Thus, a
large number of excellent advantages can be provided such that a
medical telemetry system that can prevent detachment of an
electrode from causing a malfunction to occur and can smoothly and
simply exchange information between a patient and a monitor can be
constructed.
[0130] Particularly, according to the communication system of the
invention adopting the configuration described above, if
instruction information including a request for sending detection
data is transmitted periodically, for example, every 30 minutes
from the remotely located biological signal input apparatus to the
Holter electrocardiograph, the conditions of the patient can be
grasped in time series and moreover the biological signal input
apparatus can always make proper data analysis easily and promptly.
In the communication system of the invention, data different from
the disease conditions of the patient, such as an electrode
detachment state from the patient and a radio wave cutoff state
with the transmitter-receiver can be detected reliably, so that the
reliability of the detection data of a biological signal can be
enhanced sufficiently and the accuracy of the data analysis result
can also be enhanced; the advantages for patient management are
extremely large.
[0131] The disclosures of U.S. Ser. No. 09/220,751 are incorporated
herein by reference.
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