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Method and device for detecting heart rhythm irregularities

a heart rhythm and irregularity technology, applied in the field of methods and devices for detecting heart rhythm irregularities, can solve the problems of increased risk of heart failure, dementia, and the cost of ecg equipment, and achieve the effect of reducing errors and high utility value in the medical industry

Inactive Publication Date: 2020-02-27
LIN SHIMING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method and device that can non-invasively detect heart rhythm irregularities using a special algorithm. This can be done by monitoring a person's heart rate continuously and measuring the pulse and its rhythm using a sphygmomanometer or a wearable device like a smartwatch. This provides a convenient and accurate way to measure pulse and rhythm for self-care and daily healthcare. The device can also be used in emergency situations and medical institutions.

Problems solved by technology

Of all the heart rhythm irregularities, atrial fibrillation is the one that requires medical attention the most often because it may increase the risk of heart failure, dementia, and stroke.
While the ECG method provides the more accurate measurement result, the operation and determination skills required are also more sophisticated, not to mention the costly ECG equipment.
As to photoplethysmography, it is subject to interference from the environment (e.g., the sweat on a user's skin and the degree of contact between the sensor and the user's skin) and therefore has relatively large measurement errors.
Today, monitoring devices that can take relatively accurate measurement of the pulse or heart rate are generally bulky and hence do not allow monitoring wherever and whenever desired.
Smart bracelets that claim to be capable of measuring or monitoring heart rate in real time (based on measurement of the pulse) are indeed available, but despite their portability, huge measurement errors tend to result from the environment, which poses a tremendous risk of health to those who have cardiovascular disease and require their heart rates to be accurately monitored.
Besides, while heart rhythm irregularities may be accompanied by a pulse deficit, directly identifying an irregular pulse as a heart rhythm irregularity could be erroneous.
Moreover, there has never been a method or device that not only can measure heart rate, but also can determine the occurrence of sick sinus syndrome and detect such heart rhythm irregularities as irregular pulse peaks, irregular heartbeat, and atrial fibrillation.

Method used

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  • Method and device for detecting heart rhythm irregularities
  • Method and device for detecting heart rhythm irregularities
  • Method and device for detecting heart rhythm irregularities

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0043]I. Determining the Occurrence (Absence) of an Irregular Pulse Peak

[0044]Referring to steps a and b in FIG. 1, the method of the present invention for detecting heart rhythm irregularities can be used to detect an irregular pulse peak, and the determination steps are as follows:

[0045][Step a]:

[0046]Pulse peaks are measured continuously for 25 seconds to obtain a pulse peak sequence and a pulse peak time interval sequence P(i) corresponding to the pulse peak sequence, where i is an integer ranging from 1 to N.

[0047]Referring to the pulse signal graph in FIG. 6, pulse signals are detected while the bladder is gradually pressurized (i.e., inflated). Pulse peaks are measured continuously for 25 seconds such that a pulse peak sequence and a pulse peak time interval sequence P(i) corresponding to the pulse peak sequence are obtained, where i is an integer ranging from 1 to 15. During the 25-second period, the first pulse peak detected (indicated by the letter a in FIG. 6) and the sec...

embodiment 2

[0059]II. Embodiment 2-Determining the Occurrence (or Absence) of Irregular Heartbeat

[0060]Referring to step c in FIG. 1, the method of the present invention for detecting heart rhythm irregularities can be used to detect irregular heartbeat, and the determination step is as follows:

[0061][Step c]:

[0062]Following step b, IPP determination is performed on each pulse peak time interval in the pulse peak time interval sequence P(i), i.e., on the first through the Nth pulse peak time intervals. The number B of the irregular pulse peaks identified in the sequence P(i) is counted. Then, the ratio of the number B of the identified irregular pulse peaks to the total number N of the time intervals in the sequence P(i) is calculated. If the ratio is larger than or equal to a threshold value, it is determined that irregular heartbeat (IHB) has occurred. The threshold value in this embodiment is 20%, but the present invention has no limitation on this value. Mathematically, the determination of...

embodiment 3

[0066]III. Embodiment 3-Determining the Occurrence (or Absence) of Atrial Fibrillation

[0067]Referring to steps d to f in FIG. 1, the method of the present invention for detecting heart rhythm irregularities can be used to detect atrial fibrillation, and the determination steps are as follows:

[0068][Step d]:

[0069]After step c (i.e., after determining the occurrence or absence of IHB in the sequence P(i)), measurement is stopped for 10 seconds. Then, pulse peaks are measured continuously for 25 seconds to obtain another pulse peak sequence and a pulse peak time interval sequence Q(i) corresponding to this pulse peak sequence, where i is an integer ranging from 1 to N. The occurrence (or absence) of IHB in the sequence Q(i) is determined as in step c.

[0070][Step e]:

[0071]Measurement is stopped for 10 seconds, and then pulse peaks are measured continuously for 25 seconds to obtain yet another pulse peak sequence and a pulse peak time interval sequence R(i) corresponding to this pulse pe...

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Abstract

A method for detecting heart rhythm irregularities, including the steps of: measuring pulse peaks continuously over a period of time to obtain pulse peak sequence and pulse peak time interval sequence corresponding to the pulse peak sequence; and calculating the absolute value of a difference between a single pulse peak time interval in the pulse peak time interval sequence and an average value of the pulse peak time interval sequence, and determining that an irregular pulse peak (IPP) has occurred if the absolute value is larger than or equal to 15% to 25% of the average value of the pulse peak time interval sequence. A detection device using the method is also provided. This uses a non-invasive approach to detect heart rhythm irregularities such as sick sinus syndrome, irregular pulse peaks, irregular heartbeat, and atrial fibrillation, and can be applied to a sphygmomanometer or a wearable device.

Description

BACKGROUND OF THE INVENTION1. Technical Field[0001]The present invention relates to a method and device for detecting heart rhythm irregularities. More particularly, the invention relates to a method and device that measure pulse peaks in order to detect an irregular pulse peak (IPP), irregular heartbeat (IHB), atrial fibrillation (AF), and sick sinus syndrome (SSS).2. Description of Related Art[0002]The human circulatory system is composed of the heart, blood vessels, and blood, and is driven by contraction of the heart. Each time the heart contracts, the blood in the left ventricle is squeezed into the aorta and then into the other arteries in the body. As the diameter of an artery increases with the pressure therein when a large amount of blood enters the artery, the contraction and relaxation of the ventricles in a cardiac cycle causes arteries to expand and recoil (i.e., to pulsate) in a cyclic manner. The pulsation of arteries that are relatively close to the skin can be felt ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B5/046A61B5/022A61B5/00A61B5/361
CPCA61B5/02208A61B5/046A61B5/681A61B5/0225F04B45/047F04B39/121F04B39/123A61B5/02141A61B5/0235F04B43/02F04B53/10A61B5/361
Inventor LIN, SHIMING
Owner LIN SHIMING
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