How does hair affect FSpO2 oximetry readings?
Hair can affect the pulse oximeter in two ways. First, light transmission is weakened when light is absorbed by hair, thus making it more difficult for the oximeter to obtain adequate signals. Second, hair may prevent the sensor from making intimate contact with the fetus’ skin and, consequently, cause light shunts (see the earlier discussion regarding contact electrodes and hair). Placement of the sensor beyond the hairline reduces the likelihood of these two effects interfering with FSpO2 readings.
