Method of and apparatus for analyzing propagation of arterial pulse waves through the circulatory system
First Claim
1. An apparatus for analyzing the propagation of arterial pulse waves in a patient, comprising:
- means for detecting an electrocardiographic signal with electrodes adapted to be attached to breast or extremities of said patient;
means for detecting an R-wave from said detected electrocardiographic signal, and generating an R-wave timing signal at the time of said R-wave detection;
pulse wave detecting means adapted to be attached to a peripheral blood vessel portion of said patient, and being capable of detecting an arterial plethysmographical signal;
means for detecting a pulse wave peak of said detected arterial plethysmographical signal, and generating a peak timing signal at the time of said pulse wave peak detection;
means for determining an arterial pulse wave propagation time on the basis of said R-wave timing signal and said peak timing signal, said pulse wave propagation time determination involving successively measuring a time interval between the generation of said R-wave timing signal and the generation of said peak timing signal;
pulse wave propagation time analyzing means for analyzing a distribution of individual pulse wave propagation times for a predetermined period and the fluctuation between individual pulse wave propagation times and for calculating the standard deviation of the pulse wave propagation times; and
outputting means for displaying or recording the result of said analysis conducted by said means for analyzing the pulse wave propagation time.
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Abstract
Method and apparatus for analyzing the propagation of arterial pulse waves in a patient'"'"'s circulatory system. The apparatus comprises R-wave detecting means for outputting an R-wave timing signal at the time of detection of the R-wave component contained in a detected electrocardiographic signal. A pulse wave peak detecting means is provided for outputting a peak timing signal at the time of the detection of a selected peak of the arterial pulse wave detected in the peripheral blood vessels of a patient'"'"'s circulatory system. A pulse wave propagation time counter is provided for successively counting the time interval from the input of the R-wave timing signal to the input of the peak timing signal, and a pulse wave propagation time analyzer is provided for analyzing the distribution of pulse wave propagation times and other detected biophysiological parameters, from which an effective diagnosis of the condition of the patient'"'"'s circulatory system can be made.
102 Citations
7 Claims
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1. An apparatus for analyzing the propagation of arterial pulse waves in a patient, comprising:
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means for detecting an electrocardiographic signal with electrodes adapted to be attached to breast or extremities of said patient; means for detecting an R-wave from said detected electrocardiographic signal, and generating an R-wave timing signal at the time of said R-wave detection; pulse wave detecting means adapted to be attached to a peripheral blood vessel portion of said patient, and being capable of detecting an arterial plethysmographical signal; means for detecting a pulse wave peak of said detected arterial plethysmographical signal, and generating a peak timing signal at the time of said pulse wave peak detection; means for determining an arterial pulse wave propagation time on the basis of said R-wave timing signal and said peak timing signal, said pulse wave propagation time determination involving successively measuring a time interval between the generation of said R-wave timing signal and the generation of said peak timing signal; pulse wave propagation time analyzing means for analyzing a distribution of individual pulse wave propagation times for a predetermined period and the fluctuation between individual pulse wave propagation times and for calculating the standard deviation of the pulse wave propagation times; and outputting means for displaying or recording the result of said analysis conducted by said means for analyzing the pulse wave propagation time. - View Dependent Claims (2, 3, 4, 5)
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6. Method for analyzing the propagation of arterial pulse waves in a patient, comprising the steps of:
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(a) detecting an electrocardiographic signal using electrodes adapted to be attached to the breast or other extremities of said patient; (b) detecting an R-wave from said detected electrocardiographic signal, and generating an R-wave timing signal at the time of said R-wave detection; (c) detecting an arterial plethysmographical signal at a peripheral blood vessel portion of said patient; (d) detecting a pulse wave peak of said detected arterial plethysmographical signal, and generating a peak timing signal at the time of said pulse wave peak detection; (e) determining an arterial pulse wave propagation time on the basis of said R-wave timing signal and said peak timing signal, said pulse wave propagation time determination involving successively measuring a time interval between the generation of said R-wave timing signal and the generation of said peak timing signal; (f) analyzing over a predetermined period of time, detected arterial pulse wave propagation times and the fluctuation between individual pulse wave propagation times, and computing a distribution of individual pulse wave propagation times and calculating the standard deviation of the pulse wave propagation times; and (g) displaying or recording the results of said analysis performed by step (f). - View Dependent Claims (7)
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Specification