A novel measure of airflow limitation may find more sleep-disordered breathing cases in pregnancy


  • Pulse transit time (PTT) may be a useful alternative measure of airway resistance and airflow limitation to assess sleep-disordered breathing (SDB) severity in pregnancy.

Why this matters

  • Subtle changes in airflow limitation during sleep are prevalent and linked to adverse outcomes in pregnant women, however they are not generally captured during conventional scoring of respiratory events during sleep.