title: SpO2 sensor embedded in a finger ring: design and implementation.
abstract: A novel concept of Oxygen Saturation (SpO2) sensor embedded in a finger ring is presented in this paper. Due to the mechanical conception of the probe, the sensor fits any finger topology and assures a constant force applied to the phalanx. Ambient light artifacts are rejected at the analog electronics level. Finally, an innovative distribution of light sources and detectors and a dedicated signal processing procedure resolve the anatomical heterogeneity of different phalanx topologies, compensate low perfusion indexes due to the phalanx anatomy and estimates equivalent pulse oximetry SpO2 indexes. First in-vivo validation results of the novel sensor are discussed at the end of the paper.
authors.affiliation: Swiss Center for Electron. & Microtechnol., Neuchâtel, Switzerland. jsa@csem.ch
authors.forename: J
authors.initials: J
authors.lastname: Solà
authors.forename: S
authors.initials: S
authors.lastname: Castoldi
authors.forename: O
authors.initials: O
authors.lastname: Chételat
authors.forename: M
authors.initials: M
authors.lastname: Correvon
authors.forename: S
authors.initials: S
authors.lastname: Dasen
authors.forename: S
authors.initials: S
authors.lastname: Droz
authors.forename: N
authors.initials: N
authors.lastname: Jacob
authors.forename: R
authors.initials: R
authors.lastname: Kormann
authors.forename: V
authors.initials: V
authors.lastname: Neumann
authors.forename: A
authors.initials: A
authors.lastname: Perrenoud
authors.forename: P
authors.initials: P
authors.lastname: Pilloud
authors.forename: C
authors.initials: C
authors.lastname: Verjus
authors.forename: G
authors.initials: G
authors.lastname: Viardot
mesh_terms: D000328:Adult; D001785:Blood Gas Monitoring, Transcutaneous / Q000295:instrumentation* / Q000379:methods; D002196:Capillaries / Q000033:anatomy & histology; D004867:Equipment Design; D005385:Fingers; D006801:Humans; D000860:Hypoxia; D010092:Oximetry / Q000295:instrumentation* / Q000379:methods*; D010100:Oxygen / Q000378:metabolism*; D012815:Signal Processing, Computer-Assisted; D013314:Stress, Mechanical; D013997:Time Factors
chemical_list: D010100:Oxygen