Techniques for identifying representative PPG pulses
Inventors
Rantanen, Antti Aleksi • Koskimäki, Heli Tuulia • Pärkkä, Juha • PATEL, Shyamal • Heikkinen, Olli Petteri • Vallius, Tero Juhani • Järvelä, Jussi Petteri • Kangas, Mikka Petteri • Koivisto, Hannu • Mäkinen, Jukka Tapani • Ohukainen, Pauli Juhani
Assignees
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Publication Number
US-12611113-B2
Publication Date
2026-04-28
Expiration Date
Abstract
Methods, systems, and devices for identifying representative photoplethysmogram (PPG) pulses are described. A method may include acquiring a first set of PPG pulses from a user via a wearable device. The method may include comparing a set of morphological features of the first set of PPG pulses, and determining one or more PPG profiles for the user, where the one or more PPG profiles each include a set of morphological value ranges for the set of morphological features. The method may include acquiring a second set of PPG pulses from the user via the wearable device, and determining that one or more PPG pulses from the second set of PPG pulses match the one or more PPG profiles. The method may include determining one or more physiological metrics associated with the user based on the one or more PPG pulses matching the one or more PPG profiles.
Core Innovation
The invention acquires photoplethysmogram (PPG) data from a user via a wearable device using first light associated with a first wavelength and second light associated with a second wavelength, where the PPG data comprises a first set of PPG pulses. It compares, across the first set of PPG pulses, a plurality of morphological features of each PPG pulse and uses the comparison to form wavelength-associated PPG profiles representative of the acquired PPG data.
For the first wavelength, the invention determines a first set of PPG profiles, and each profile includes a plurality of morphological value ranges for the plurality of morphological features based on morphological values of PPG pulses associated with the first wavelength. It similarly determines a second set of PPG profiles associated with the second wavelength, where each second-wavelength profile includes a plurality of morphological value ranges based on morphological values of PPG pulses associated with the second wavelength.
The invention then determines one or more PPG profiles representative of the acquired PPG data based on determining the first set, the second set, or both. It acquires additional PPG data comprising a second set of PPG pulses, determines that one or more PPG pulses from the second set match the one or more PPG profiles based on morphological feature values satisfying the morphological value ranges, and determines one or more physiological metrics associated with the user using the matching PPG pulses while refraining from using non-matching PPG pulses.
Claims Coverage
The document provides three independent claim sets (method, apparatus, and non-transitory computer-readable medium). Across these independent claims, the inventive features center on multi-wavelength PPG acquisition, morphological-feature comparison, representative wavelength-specific PPG profile generation defined by morphological value ranges, pulse-to-profile matching, and determining physiological metrics using only matching pulses while refraining from using non-matching pulses.
Multi-wavelength PPG acquisition via wearable device
Acquiring photoplethysmogram (PPG) data from a user via a wearable device using first light associated with a first wavelength and second light associated with a second wavelength, the PPG data comprising a first set of PPG pulses.
Morphological feature comparison across PPG pulses
Comparing, across the first set of PPG pulses, a plurality of morphological features of each PPG pulse.
Representative PPG profile generation defined by morphological value ranges
Determining a first set of PPG profiles associated with the first wavelength and a second set of PPG profiles associated with the second wavelength, where each profile comprises a plurality of morphological value ranges for the plurality of morphological features, and determining one or more PPG profiles representative of the acquired PPG data based on the first set, the second set, or both.
Pulse matching to representative profiles and physiological metric determination using only matching pulses
Acquiring additional PPG data comprising a second set of PPG pulses; determining that one or more PPG pulses from the second set match the one or more PPG profiles based on morphological feature values satisfying the morphological value ranges; and determining one or more physiological metrics associated with the user using the matching PPG pulses while refraining from using non-matching PPG pulses.
Across the independent claims, the scope centers on building wavelength-specific representative PPG profiles using morphological features and morphological value ranges, matching additional pulses to those profiles, and using only matched pulses to determine physiological metrics while refraining from using non-matching pulses.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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