Measurement of the hemoglobin oxygen saturation level with spectroscopic spectral-domain optical coherence tomography.
We report the measurement of the hemoglobin (Hb) oxygen saturation level in human blood with a spectroscopic spectral-domain optical coherence tomography (SSD-OCT) system based on the crossover behavior of Hb and oxyhemoglobin (HbO(2)) absorption coefficients around 800 nm. By calculating the ratio of the exponential decay constant of A-mode scan signal in the long-wavelength range (>800 nm) over that in the short-wavelength range (<800 nm), the relative oxygen saturation level of Hb can be calibrated. Such a relative level can be used for practical diagnosis application after a golden standard is built by comparing the variation of the OCT result with that of a conventional method, such as the use of a blood gas analyzer. In our experiment, the variation curve based on the SSD-OCT measurement, which has the advantages of noninvasive, real-time, and high-resolution measurements, is coincident with that of using a commercial blood gas analyzer.
Lu
Chih-Wei
CW
Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan.
Lee
Cheng-Kuang
CK
Tsai
Meng-Tsan
MT
Wang
Yih-Ming
YM
Yang
C C
CC
D000465:Algorithms; D001774:Blood Chemical Analysis / Q000379:methods*; D010092:Oximetry / Q000379:methods*; D010108:Oxyhemoglobins / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis / Q000379:methods*; D041623:Tomography, Optical Coherence / Q000379:methods*
D010108:Oxyhemoglobins