SpO2 sensor embedded in a finger ring: design and implementation.
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.
Solà
J
J
Swiss Center for Electron. & Microtechnol., Neuchâtel, Switzerland. jsa@csem.ch
Castoldi
S
S
Chételat
O
O
Correvon
M
M
Dasen
S
S
Droz
S
S
Jacob
N
N
Kormann
R
R
Neumann
V
V
Perrenoud
A
A
Pilloud
P
P
Verjus
C
C
Viardot
G
G
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
D010100:Oxygen