Method and apparatus for detecting physiologic signals
First Claim
1. A method for analyzing a physiological signal comprising the steps of:
- obtaining a physiological signal that comprises a set of waveforms followed by an additional waveform;
wherein the set of waveforms comprises;
a first waveform;
a last waveform; and
one or more intermediate waveforms located between the first waveform and the last waveform;
obtaining a maximum slope for the first waveform, the last waveform and the one or more intermediate waveforms;
obtaining a maximum slope for the additional waveform by performing the steps of;
confirming the maximum slope for the additional waveform is greater than a minimum threshold; and
confirming the maximum slope for the additional waveform is less than a maximum threshold;
wherein the minimum threshold and the maximum threshold are derived from the maximum slopes for the first waveform, the last waveform and the one or more intermediate waveforms.
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Accused Products
Abstract
The invention analyzes relationships between factors, within a patient population, to identify autonomic dysfunction patterns. Patient test results are then compared with the identified patterns to determine the patient'"'"'s autonomic function. The invention can continually amend the patient population with new test results to create increasingly accurate normative data sets from which a patient'"'"'s autonomic function can be more accurately assessed. The invention may apply this concept in an application service provider model. An embodiment of the invention may use a novel method of identifying certain components on physiological signals such as the R-wave for an ECG. The method locates R-waves by searching for maximum slope values and cycle lengths that satisfy certain threshold values. Another embodiment of the invention entails a non-provocative HRV test whereby certain time domain and frequency domain factors are analyzed to determine a patient'"'"'s autonomic function.
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Citations
60 Claims
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1. A method for analyzing a physiological signal comprising the steps of:
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obtaining a physiological signal that comprises a set of waveforms followed by an additional waveform;
wherein the set of waveforms comprises;a first waveform; a last waveform; and one or more intermediate waveforms located between the first waveform and the last waveform; obtaining a maximum slope for the first waveform, the last waveform and the one or more intermediate waveforms; obtaining a maximum slope for the additional waveform by performing the steps of; confirming the maximum slope for the additional waveform is greater than a minimum threshold; and confirming the maximum slope for the additional waveform is less than a maximum threshold;
wherein the minimum threshold and the maximum threshold are derived from the maximum slopes for the first waveform, the last waveform and the one or more intermediate waveforms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A system for analyzing a physiologic signal comprising:
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one or more memory units operable for storing one or more computer products for assessing autonomic performance; and one or more processors coupled to the one or more memory units, wherein the one or more processors execute the one or more computer products for performing the steps of; obtaining a physiological signal that comprises a set of waveforms followed by an additional waveform;
wherein the set of waveforms comprises;a first waveform; a last waveform; and one or more intermediate waveforms located between the first waveform and the last waveform; obtaining a maximum slope for the first waveform, the last waveform and the one or more intermediate waveforms; obtaining a maximum slope for the additional waveform by performing the steps of; confirming the maximum slope for the additional waveform is greater than a minimum threshold; and confirming the maximum slope for the additional waveform is less than a maximum threshold;
wherein the minimum threshold and the maximum threshold are derived from the maximum slopes for the first waveform, the last waveform and the one or more intermediate waveforms. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A method for analyzing a physiological signal comprising the steps of:
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obtaining a physiological signal that comprises a set of waveforms followed by an additional waveform;
wherein the set of waveforms comprises;a first waveform; a last waveform; and one or more intermediate waveforms located between the first waveform and the last waveform; obtaining a fiduciary point for the first waveform, the last waveform, the one or more intermediate waveforms and the additional waveform; obtaining a cycle length between the fiduciary point for the last waveform and the fiduciary point for the additional waveform; obtaining a longest cycle length within the set of waveforms; obtaining a shortest cycle length within the set of waveforms; obtaining a verified fiduciary point for the additional waveform by performing the steps of; confirming the cycle length is less than a maximum cycle length; and confirming the cycle length is greater than a minimum cycle length;
wherein the maximum cycle length is derived from the longest cycle length within the set of waveforms and the minimum cycle length is derived from the shortest cycle length within the set of waveforms. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification