TY - GEN
T1 - A Novel Wavelength-Division Differential Detection Technique for Microwave Pulse Oximetry
AU - Carman, Aaron B.
AU - Li, Changzhi
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Pulse oximetry is a common measure of patient health due to the correlation between peripheral oxygen saturation and arterial oxygen saturation. Current clinical grade pulse oximeters operate in transmittance mode and therefore must be placed on extremities such as the fingers, restricting patient mobility. Reflectance mode pulse oximeters are widely used in consumer applications, but lack the accuracy and precision required in clinical settings. In this paper, a novel wavelength-division differential detection technique is proposed which allows for a microwave-sensing based approach to reflectance mode pulse oximetry. The theory of microwave wavelength-division differential detection is given, then evaluated using a full-wave simulation of a wearable setup. The theoretical results demonstrate that wavelength-division differential detection produces a signal proportional to changes in the blood's dielectric characteristics but is dependent on the distance from sensor to target. Full-wave results confirm that wavelength-division differential detection may provide an avenue for a more accurate reflectance mode pulse oximetry measurement using microwave near-field sensing.
AB - Pulse oximetry is a common measure of patient health due to the correlation between peripheral oxygen saturation and arterial oxygen saturation. Current clinical grade pulse oximeters operate in transmittance mode and therefore must be placed on extremities such as the fingers, restricting patient mobility. Reflectance mode pulse oximeters are widely used in consumer applications, but lack the accuracy and precision required in clinical settings. In this paper, a novel wavelength-division differential detection technique is proposed which allows for a microwave-sensing based approach to reflectance mode pulse oximetry. The theory of microwave wavelength-division differential detection is given, then evaluated using a full-wave simulation of a wearable setup. The theoretical results demonstrate that wavelength-division differential detection produces a signal proportional to changes in the blood's dielectric characteristics but is dependent on the distance from sensor to target. Full-wave results confirm that wavelength-division differential detection may provide an avenue for a more accurate reflectance mode pulse oximetry measurement using microwave near-field sensing.
UR - http://www.scopus.com/inward/record.url?scp=85122549110&partnerID=8YFLogxK
U2 - 10.1109/EMBC46164.2021.9630442
DO - 10.1109/EMBC46164.2021.9630442
M3 - Conference contribution
C2 - 34892805
AN - SCOPUS:85122549110
T3 - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
SP - 7390
EP - 7393
BT - 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2021
Y2 - 1 November 2021 through 5 November 2021
ER -