Extended Data Fig. 9: Calibration of fetal SpO2 with cord blood gas analysis.
From: A filamentary soft robotic probe for multimodal in utero monitoring of fetal health
(a-b) Raw continuous µ-IPD signals during an ex-utero sheep fetal surgery. (c) The ratio R between the perfusion indices of red and IR µ-IPD signals. (d) Calibration of fetal SpO2 using linear regression between the perfusion index ratio R and arterial blood gas SaO2 values. (e) Computed physiological parameters, including calibrated SpO2, heart rate, and core temperature, during the same period of the experiment.
