Method and apparatus for measurement of autonomic nervous system function
First Claim
1. A method for assessing autonomic function comprising the steps of:
- receiving background data from a population of patients wherein the population of patients is comprised of a first group of patients with a first state of autonomic function and a second group of patients with a second state of autonomic function;
receiving physiologic data from the population of patients;
determining from the physiologic data and the background data a first discriminant equation that discriminates between the first group of patients with the first state of autonomic function and the second group of patients with the second state of autonomic function;
receiving physiologic data from a new patient; and
inputting the physiologic data from the new patient into the first discriminant equation to provide a first autonomic ranking that is indicative of an autonomic function of the new patient.
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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 ECG R-waves. The method locates R-waves by searching for maximum slope values, in signals, that exceed 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.
31 Citations
66 Claims
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1. A method for assessing autonomic function comprising the steps of:
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receiving background data from a population of patients wherein the population of patients is comprised of a first group of patients with a first state of autonomic function and a second group of patients with a second state of autonomic function;
receiving physiologic data from the population of patients;
determining from the physiologic data and the background data a first discriminant equation that discriminates between the first group of patients with the first state of autonomic function and the second group of patients with the second state of autonomic function;
receiving physiologic data from a new patient; and
inputting the physiologic data from the new patient into the first discriminant equation to provide a first autonomic ranking that is indicative of an autonomic function of the new patient. - 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)
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24. A system for assessing autonomic performance comprising:
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a memory unit operable for storing one or more computer products for assessing autonomic performance; and
a processor coupled to the memory unit, wherein the processor executes the one or more computer products for performing the steps of;
receiving background data and HRV data from a population of patients having patients with a first state of autonomic function and patients with a second state of autonomic function;
performing discriminant analysis on the HRV data and the background data from the population of patients to determine a plurality of discriminant equations wherein each discriminant equation discriminates between the patients with the first state of autonomic function and the patients with the second state of autonomic function;
receiving background data and HRV data from a new patient;
selecting a discriminant equation from the plurality of discriminant equations in response to the background data from the new patient; and
inputting the HRV data from the new patient into the selected discriminant equation to provide an autonomic ranking that is indicative of an autonomic function of the new patient. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 45)
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35. A method for assessing autonomic performance using a computer system, wherein the computer system includes one or more client computers, a server computer coupled to the one or more client computers, one or more memories coupled to the server computer, and one or more computer program products stored in the one or more memories, the method comprising:
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storing a population data set, comprised of physiologic data and background data received from a population of patients wherein the population of patients is comprised of patients with a first state of autonomic function and patients with a second state of autonomic function, in the one or more memories;
using the one or more computer program products to process the population data set to determine a first discriminant equation that discriminates between the patients with the first state of autonomic function and the patients with the second state of autonomic function;
storing the first discriminant equation in the one or more memories;
using the one or more client computers to access the first discriminant equation;
receiving physiologic data from a new patient;
and entering the physiologic data from the new patient into the first discriminant equation to produce a first autonomic ranking, wherein the first autonomic ranking is indicative of an autonomic function of the new patient. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44)
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46. A method of assessing autonomic function comprising:
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receiving background data from a population of patients wherein the population of patients is comprised of patients with abnormal autonomic function and patients with normal autonomic function;
receiving ECG data from the population of patients;
measuring the ECG data from the population of patients to obtain one or more HRV parameters from the population of patients wherein the one or more HRV parameters from the population of patients are selected from the group consisting of;
30;
15 Ratio, NNmin Standing, NNmax Standing, Tmax, Trec, E/I Ratio, SD, NNmin SB, NNmax SB, VARmax, VARmean, RMS-SD, NN, SDNN, TP, LFnorm, HFnorm, LF/HF, VLF, LF, HF, VR and combinations thereof;
performing statistical discriminant analysis on the one or more HRV parameters from the population of patients and the background data from the population of patients to determine a plurality of discriminant equations wherein each discriminant equation discriminates between the patients with abnormal autonomic function and the patients with normal autonomic function;
receiving background data from a new patient;
receiving ECG data from the new patient;
measuring the ECG data from the new patient to obtain one or more HRV parameters from the new patient wherein the one or more HRV parameters are selected from the group consisting of;
30;
15 Ratio, NNmin Standing, NNmax Standing, Tmax, Trec, E/I Ratio, SD, NNmin SB, NNmax SB, VARmax, VARmean, RMS-SD, NN, SDNN, TP, LFnorm, HFnorm, LF/HF, VLF, LF, HF, VR and combinations thereof;
selecting a discriminant equation from the plurality of discriminant equations in response to the background data from the new patient;
inputting the one or more HRV parameters from the new patient into the selected discriminant equation to provide an autonomic ranking that is indicative of an autonomic function of the new patient. - View Dependent Claims (47)
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48. A method for assessing autonomic function comprising:
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receiving HRV data from a patient that comprises at least one HRV measurement;
inputting the HRV data into a first discriminant equation to provide a first autonomic ranking that is indicative of an autonomic function of the patient, wherein the first discriminant equation discriminates between a first group of patients with a first state of autonomic function and a second group of patients with a second state of autonomic function. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56)
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57. One or more computer program products, having one or more computer readable mediums with computer program logic recorded thereon, for assessing autonomic function, comprising:
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programming operable for receiving background data from a population of patients wherein the population of patients is comprised of a first group of patients with a first state of autonomic function and a second group of patients with a second state of autonomic function;
programming operable for receiving physiologic data from the population of patients;
programming operable for determining from the physiologic data and the background data a first discriminant equation that discriminates between the first group of patients with the first state of autonomic function and the second group of patients with the second state of autonomic function;
programming operable for receiving physiologic data from a new patient; and
programming operable for inputting the physiologic data from the new patient into the first discriminant equation to provide a first autonomic ranking that is indicative of an autonomic function of the new patient. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66)
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Specification