Figure 7. Relationship between arterial oxygen content (C_a,O2) and cerebral blood flow (CBF), expressed as a percentage of baseline.

Data were obtained from baseline, hypoxic and recovery periods from seven fetal sheep. Regression equations for both methods are shown. Results of laser Doppler and microsphere methods were similar and showed a progressive influence of C_a,O2 as values declined below ≈4 ml dl⁻¹.