Patent EP0321764A1 successfully refreshed from Google Patents.
EP0321764A1
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Method and means for detecting events in a signal
Assignee: Siemens AG
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Filing: 1988-12-05
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Granted: —
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Expires: 2008-12-05
Abstract
Abstract An event detector, useful, for example, in pacemaker technology, detects signal portions which have characteristic events exceeding a certain established threshold. An optimal setting of the detector sensitivity is achieved by passing the input signal through a circuit which measures the signal's maximal values, then establishes the difference between the maximal values and the established threshold, and, in a preferred embodiment, controls the threshold in accordance with the difference and a given desired threshold value. The desired threshold value can be based on, for example, difference histograms or trend data. The event detector can be designed to respond to a variety of signal parameters, such as amplitude and/or slope.
Inventors
- 👤 Hans Andersen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 09:12
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365; A61N1/36507; A61N1/36514; A61N1/37; A61N1/3702; A61N1/3704
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A method for detecting events in an electric signal, comprising the steps of: a) establishing a threshold for said signal in a manner that an event exceeds said threshold; b ) measuring the maximal value of said event exceeding the established threshold; c) establishing the difference between the maximal value of said event and the established threshold; and d) evaluating the threshold dependent on said difference.
Claim 2
Independent Claim
66 words
A method for detecting events in an electric signal, comprising the steps of: a) establishing a threshold for said signal in a manner that an event exceeds said threshold; b ) measuring the maximal value of said event exceeding the established threshold; c) establishing the difference between the maximal value of said event and the established threshold; and d) evaluating the threshold dependent on said difference.
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein the difference is expressed as a fraction of said threshold.
Claim 4
Dependent Claim
16 words
A method according to claim 1, wherein the threshold is additionally controlled dependent on said difference.
Claim 5
Dependent Claim
21 words
A method according to claim 3, wherein the threshold is controlled by said difference and, additionally, by a desired threshold value.
Claim 6
Dependent Claim
19 words
A method according to claim 4, wherein said desired value is derived from a histogram of previous difference values.
Claim 7
Dependent Claim
25 words
A method according to claim 4, wherein said desired value is derived from a diagram representing the development over time of the previous difference values.
Claim 8
Dependent Claim
69 words
Means for detecting events in an electric signal, comprising: a) means for establishing a threshold for said signal in a manner that an event exceeds that threshold; b) means for measuring the maximal value of said event exceeding the established threshold, c) means for establishing the difference between the maximal value of said event and the established threshold; and d) means for evaluating the threshold dependent on said difference.
Claim 9
Dependent Claim
69 words
Means for detecting events in an electric signal, comprising: a) means for establishing a threshold for said signal in a manner that an event exceeds that threshold; b) means for measuring the maximal value of said event exceeding the established threshold, c) means for establishing the difference between the maximal value of said event and the established threshold; and d) means for evaluating the threshold dependent on said difference.
Claim 10
Dependent Claim
16 words
Means according to claim 7, wherein the difference is expressed as a fraction of said threshold.
Claim 11
Dependent Claim
17 words
Means according to claim 7, wherein the evaluating means additionally control the threshold dependent on said difference.
Claim 12
Dependent Claim
20 words
Means according to claim 9, wherein the threshold is controlled by said difference, and, additionally, by a desired threshold value.
Claim 13
Dependent Claim
18 words
Means according to claim 10, wherein said desired value is derived from a histogram of previous difference values.
Claim 14
Dependent Claim
24 words
Means according to claim 10, wherein said desired value is derived from a diagram representing the development over time of the previous difference values.
Claim 15
Dependent Claim
140 words
A heart pacer for stimulating the heart of a patient, comprising: a) generating means for generating stimulation pulses; b) a pacing electrode means electrically connected with said generating means, said pacing electrode means being designated for being located in the ventricular and/or atrial portion of the heart; c) detection means for detecting events in a depolarization signal originating in the heart, comprising, c1) means for establishing a threshold for said signal in a manner that an event exceeds that threshold; c2) means for measuring the maximal value of said event exceeding the established threshold; c3) means for establishing the difference between the maximal value of said event and the established threshold: and c4) means for evaluating the threshold dependent on sald difference; and d) control means for controlling said generating means dependent on a response signal from said detection means.
Claim 16
Dependent Claim
140 words
A heart pacer for stimulating the heart of a patient, comprising: a) generating means for generating stimulation pulses; b) a pacing electrode means electrically connected with said generating means, said pacing electrode means being designated for being located in the ventricular and/or atrial portion of the heart; c) detection means for detecting events in a depolarization signal originating in the heart, comprising, c1) means for establishing a threshold for said signal in a manner that an event exceeds that threshold; c2) means for measuring the maximal value of said event exceeding the established threshold; c3) means for establishing the difference between the maximal value of said event and the established threshold: and c4) means for evaluating the threshold dependent on sald difference; and d) control means for controlling said generating means dependent on a response signal from said detection means.
Claim 17
Dependent Claim
19 words
A heart pacer according to claim 13, wherein the evaluating means additionally control the threshold dependent on said difference.
References Cited (Backward Citations)
FR2155989A1
Cited
US4708144A
Cited
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