Figure 5
From: Advances in respiratory support for high risk newborn infants
Automatic control of inspired oxygen. Recordings of SpO2 and FiO2 from a premature infant during 2Â hours of automatic control of FiO2. The ventilator automatically increases FiO2 when SpO2 declines below the target in order to keep SpO2 within the target range (horizontal lines). The magnitude of the increases in FiO2 are proportional to the decline in SpO2. FiO2 is brought back to the baseline level (thicker horizontal line) after SpO returns to the target range.