RT Journal Article
T1 A multi-wavelength, rigid-flex wearable ring oximeter for mitigating motion and skin pigmentation challenges: Hardware development and preliminary characterization
A1 Martín Escudero, María Del Pilar
A1 Cabanas, Ana M.
AB Pulse oximetry faces well-documented accuracy challenges related to skin pigmentation and motion artifacts, contributing to significant health disparities. In response, we present a wearable ring-type pulse oximeter designed to address these limitations through multi-wavelength sensing and stable anatomical coupling. The device features a rigid-flex printed circuit board integrating four LEDs (610–940 nm), dual photodetectors in transmission configuration, and a three-axis accelerometer. A Bluetooth-enabled microcontroller with adaptive acquisition firmware manages the system. The prototype was successfully fabricated and functionally validated. Optoelectronic characterization confirmed wavelength-dependent signal properties, with superior performance at longer wavelengths (740–940 nm). Preliminary testing on four healthy volunteers (Fitzpatrick skin types I–III) demonstrated reliable photoplethysmographic signal acquisition with improved signal-to-noise ratios at longer wavelengths, validating the hardware architecture’s capability to acquire high-quality multi-wavelength PPG signals. This platform establishes technical feasibility for future clinical validation. However, validation against arterial blood gas analysis across all Fitzpatrick types (I–VI), systematic motion artifact assessment, and melanin-compensated SpO2 algorithm development remain essential before clinical deployment.
PB Elsevier
SN 0924-4247
YR 2025
FD 2025-12
LK https://hdl.handle.net/20.500.14352/132982
UL https://hdl.handle.net/20.500.14352/132982
LA eng
NO Martín-Escudero P, Cabanas AM. A multi-wavelength, rigid-flex wearable ring oximeter for mitigating motion and skin pigmentation challenges: Hardware development and preliminary characterization. Sensors and Actuators A: Physical 2025;396:117213. https://doi.org/10.1016/j.sna.2025.117213.
NO 2025 Acuerdos transformativos CRUE
DS Docta Complutense
RD 23 abr 2026