Electrode device and electrocardiographic measurement device
View Patent ↗A device for electrocardiogram measurement is provided, which is relatively not easily influenced by electrical activities of muscles, and which can perform electrocardiogram measurement during a measured person's daily life without removing clothes. The device includes a pair of lead electrode sections that are provided on a band section. Each of the pair of lead electrode sections includes a lead electrode that is disposed so that the lead electrode is positioned in the vicinity of a carotid artery of the measured person when the band section surrounds a neck portion of the measured person. The band section is configured to include a flexible band, and the band section detachably holds onto the neck portion of the measured person with nipping force arising from elastic deformation of the flexible band.
1. An electrocardiogram measurement electrode device comprising:
a band section configured to partially surround a neck portion of a measured person;
a reference electrode section that is provided on the band section, and that includes a reference electrode configured to be positioned in a vicinity of the vertebra prominens of the measured person when the band section surrounds the neck portion of the measured person; and
a pair of lead electrode sections that are provided on the band section, each of the pair of lead electrode sections including:
(i) a lead electrode configured to be positioned in a vicinity of a carotid artery of the measured person when the band section surrounds the neck portion of the measured person, and
(ii) a voltage follower, wherein an input terminal of the voltage follower is connected to the lead electrode, and a power-supply terminal of the voltage follower is connected to the reference electrode.
2. The electrocardiogram measurement electrode device according to claim 1 , wherein the band section includes a flexible band, and the band section is configured to detachably hold onto the neck portion of the measured person with a force arising from elastic deformation of the flexible band.
3. An electrocardiographic measurement device comprising:
the electrocardiogram measurement electrode device according to claim 1 or 2 ;
a differential amplifier configured to amplify a difference between outputs of the respective voltage followers of the pair of lead electrode sections; and
an electric circuit section configured to perform a filtering process on an output of the differential amplifier.
4. The electrocardiograph according to claim 3 , wherein the differential amplifier and the electric circuit section are mounted on the band section.
5. An electrocardiogram measurement electrode device comprising:
a reference electrode section including a reference electrode;
a pair of lead electrode sections, each of the pair of lead electrode sections including:
(i) a lead electrode, and
(ii) a voltage follower, wherein an input terminal of the voltage follower is connected to the lead electrode and one power-supply terminal of the voltage follower is connected to the reference electrode; and
a holding section configured to hold the reference electrode section in a vicinity of the vertebra prominens of a measured person, and configured to hold the pair of lead electrode sections in vicinities of carotid arteries of the measured person.
6. A method for detecting an electrocardiogram signal, the method comprising the steps of:
detecting an electrocardiogram signal using a reference electrode that is disposed in a vicinity of the vertebra prominens of a measured person;
detecting electrocardiogram signals using a pair of lead electrodes that are disposed in respective lead electrode sections each placed in vicinities of left and right carotid arteries respectively, of the measured person;
inputting, through a respective voltage followers each disposed in corresponding the respective lead electrode sections, a corresponding one of the electrocardiogram signals that are detected using the lead electrodes to an input terminal, inputting the electrocardiogram signal that is detected using the reference electrode to one of power-supply terminals, and outputting an electrocardiogram signal; and
taking, as inputs, the electrocardiogram signals that are output from the voltage followers, each of the voltage followers being disposed in the vicinity of a corresponding one of the lead electrodes, amplifying a difference between potentials of both of the signals, and outputting a bipolar lead electrocardiogram signal.