Patent EP0068032A1 successfully refreshed from Google Patents.
EP0068032A1
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EP
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Electrocardiograph
Assignee: AKAMATSU, NORIO
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Filing: 1982-01-04
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Granted: —
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Expires: 2002-01-04
Abstract
Abstract An electrocardiograph which detects the potential of the body surface in the vicinity of the heart with electrodes and operates on the electrode signals with a computer to form a potential distribution diagram of the body surface at a prescribed time. A plurality of the potential distribution diagrams are formed at predetermined time intervals in such a manner that several to several hundred diagrams are formed for one pulse of the heart. Cardiac electric phenomena are measured from the potential distribution diagrams and changes in the diagrams. The electrodes are composed of a plurality of electrode groups, one electrode group has a plurality of stylus electrodes, the stylus electrode of one electrode group is made sufficiently close compared with the interval of the electrode groups, each group is independently held against the body surface via elastic materials, and the stylus electrodes of one electrode group are connected electrically in parallel. When any of the stylus electrodes detect the body surface potential, the potential can be detected accurately even if the other stylus electrodes of the group are making poor contact.
Inventors
- 👤 Yasuhiro Toyosu
- 👤 Norio Akamatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 20:15
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/282; A61B5/316; A61B5/318; A61B5/339; A61B5/341
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
279 words
An electrocardiograph comprising electrodes which are to be set into contact with a plurality of points of the human chest surface to detect the potentials of the contact points, an electronic circuit for performing the information processing of the input signals of the electrodes to compute the potential distribution of the body surface at a certain time, and a monitor indicating the potential distribution map of the body surface based upon the output signals of the electronic circuit, the electrode comprising a plurality of needle electrodes adapted to be in direct contact with the human body surface,an electrode box including the needle electrodes, and resilient members for resiliently pusing the head of each needle electrode toward the human body surface, each needle electrode being conductive at least on its surface, the needle electrodes being arranged in close to one another, the closely arranged needle electrodes being mutually electrically connected in parallel to form an electrode set, a plurily of such electrode sets being provided, the space between the electrode sets being much larger than the space between the needle electrodes of an electrode set, further, each needle electrode being separately resiliently movable inward and outward of the electrode box by means of the resilient member, and the needle electrodes of an electrode set being mounted so as to be movable mutually in parallel or substantially in parallel, so that the potential of a part of the body surface can be detected by an electrode set and the potentials of a plurality of distributed points of the human chest surface can be detected by a plurality of electrode sets, and then the obtained signals are fed into the electronic circuit.
Claim 2
Dependent Claim
279 words
An electrocardiograph comprising electrodes which are to be set into contact with a plurality of points of the human chest surface to detect the potentials of the contact points, an electronic circuit for performing the information processing of the input signals of the electrodes to compute the potential distribution of the body surface at a certain time, and a monitor indicating the potential distribution map of the body surface based upon the output signals of the electronic circuit, the electrode comprising a plurality of needle electrodes adapted to be in direct contact with the human body surface,an electrode box including the needle electrodes, and resilient members for resiliently pusing the head of each needle electrode toward the human body surface, each needle electrode being conductive at least on its surface, the needle electrodes being arranged in close to one another, the closely arranged needle electrodes being mutually electrically connected in parallel to form an electrode set, a plurily of such electrode sets being provided, the space between the electrode sets being much larger than the space between the needle electrodes of an electrode set, further, each needle electrode being separately resiliently movable inward and outward of the electrode box by means of the resilient member, and the needle electrodes of an electrode set being mounted so as to be movable mutually in parallel or substantially in parallel, so that the potential of a part of the body surface can be detected by an electrode set and the potentials of a plurality of distributed points of the human chest surface can be detected by a plurality of electrode sets, and then the obtained signals are fed into the electronic circuit.
Claim 3
Dependent Claim
18 words
An electrocardiograph as claimed in claim 1, in which an electrode set comprises two to six needle electrodes.
Claim 4
Dependent Claim
16 words
An electrocardiograph as claimed in claim 1, in which the needle electrode is a metal stick.
Claim 5
Dependent Claim
31 words
'4. An electrocardiograph as claimed in claim 1, in which 80 to 200 electrode sets are provided and the potentials of 80 to 200 points of human body surface are detected.
Claim 6
Dependent Claim
22 words
An electrocardiograph as claimed in claim 1, in which each needle electrode is separately pushed forward by means of a coil spring.
Claim 7
Dependent Claim
36 words
An electrocardiograph as claimed in claim 1, in which the coil spring for pushing the needle electrode is also used as a conductor and the needle electrodes are mutually electrically connected in parallel through the conductor.
Claim 8
Dependent Claim
34 words
An electrocardiograph as claimed in claim I, in which a preamplifier is provided in the electrode box and the output side of the preamplifier is connected to a lead wire for leading off signals.
Claim 9
Dependent Claim
50 words
. 8. An electrocardiograph as claimed in claim 1, in which a plurality of electrode boxes are provided, a plurality of electrode sets being mounted on each electrode box, and the electrode boxes are mutually connected through a connecting member in such a manner that their relative positions are changeable.
References Cited (Backward Citations)
No citation records indexed.
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