Apparatus and method of measuring pulse wave
First Claim
Patent Images
1. An apparatus for measuring a pulse wave, the apparatus comprising:
- a first receiver that receives a first pulse wave signal that is detected at a first point of an object;
a second receiver that receives a second pulse wave signal that is detected at a second point of the object;
an effective signal determiner configured to receive at least one signal from among an output signal of the first receiver and an output signal of the second receiver, and determine an effective pulse wave signal period using the at least one signal;
a first signal processor configured to detect a peak of the output signal of the first receiver as a first peak value, compare a magnitude of the output signal of the first receiver with a first comparative reference value, the first comparative reference value being less than the first peak value by a predetermined percentage during the effective pulse wave signal period, and determine a first output value based on a result of the comparison;
a second signal processor configured to detect a peak of the output signal of the second receiver as a second peak value, compare a magnitude of the output signal of the second receiver with a second comparative reference value, the second comparative reference value being less than the second peak value by the predetermined percentage during the effective pulse wave signal period, and determine a second output value based on a result of the comparison; and
a pulse transit time (PTT) obtainer configured to obtain a PTT from using the first output value of the first signal processor and the second output value of the second signal processor to determine a beginning time and an ending time for the pulse transit time.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is an apparatus and method of measuring a pulse wave. The method includes: causing receivers to respectively receive pulse wave signals that are detected at two points of an object, determining an effective pulse wave signal period by using the received pulse wave signals, and obtaining a pulse transit time (PTT) between the two points by using a result obtained after comparing a magnitude of an output signal of each of the receivers with a value that is less by a predetermined percentage than a peak value of an output signal of each of the receivers during the determined effective pulse wave signal period.
-
Citations
20 Claims
-
1. An apparatus for measuring a pulse wave, the apparatus comprising:
-
a first receiver that receives a first pulse wave signal that is detected at a first point of an object; a second receiver that receives a second pulse wave signal that is detected at a second point of the object; an effective signal determiner configured to receive at least one signal from among an output signal of the first receiver and an output signal of the second receiver, and determine an effective pulse wave signal period using the at least one signal; a first signal processor configured to detect a peak of the output signal of the first receiver as a first peak value, compare a magnitude of the output signal of the first receiver with a first comparative reference value, the first comparative reference value being less than the first peak value by a predetermined percentage during the effective pulse wave signal period, and determine a first output value based on a result of the comparison; a second signal processor configured to detect a peak of the output signal of the second receiver as a second peak value, compare a magnitude of the output signal of the second receiver with a second comparative reference value, the second comparative reference value being less than the second peak value by the predetermined percentage during the effective pulse wave signal period, and determine a second output value based on a result of the comparison; and a pulse transit time (PTT) obtainer configured to obtain a PTT from using the first output value of the first signal processor and the second output value of the second signal processor to determine a beginning time and an ending time for the pulse transit time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method of determining a pulse transit time (PTT) in an object using pulse waves, the method comprising:
-
receiving at a first receiver, a first pulse wave signal that is detected at a first point of the object and receiving at a second receiver, a second pulse wave signal that is detected at a second point of the object, wherein the first point of the object is located closer to a heart of the object than the second point of the object; determining an effective pulse wave signal period by using at least one signal from among an output signal of the first receiver and an output signal of the second receiver; during the effective pulse wave signal period, detecting a peak of the output signal of the first receiver as a first peak signal and detecting a peak of the output signal of the second receiver as a second peak signal; determining a first output value as a first comparative output value or a second comparative output value based on a result obtained after comparing magnitudes of the output signal of the first receiver with a first comparative reference value, the first comparative reference value being less than the first peak signal of the output signal of the first receiver and determining a second output value as a first comparative output value or a second comparative output value based on a result obtained after comparing magnitudes of the output signal of the second receiver with a second comparative reference value, the second comparative reference value being less than the second peak signal of the output signal of the second receiver; and obtaining a pulse transit time (PTT) from a beginning time to an ending time by indicating a time when the first output value and the second output value are both at the first comparative output value or the first output value is at the first comparative output value and the second output value is at the second comparative output value within the effective pulse wave signal period, the pulse transit time (PTT) being representative of a cardiovascular condition of the object including at least one of blood pressure and blood vessel elasticity, and said PTT being obtained independent of a sampling frequency for the first pulse wave signal and the second pulse wave signal. - View Dependent Claims (18, 19, 20)
-
Specification