Assessment of an urgency classification for assisted vaginal delivery

We performed a prospective observational audit to evaluate the application of the Lucas caesarean section urgency classification to assisted vaginal delivery in the operating theatre. We collected data from 400 women having category 1-3 delivery in the operating theatre. Twenty percent of the caesarean sections and 4% of the vaginal deliveries were category 1. The median (IQR) decision-delivery interval was 25 (19.5-37) min for category 1 caesarean section and 19.5 (15-29) min for category 1 vaginal delivery, and 43.5 (36-57) min and 45 (32-57) for category 2 caesarean section and vaginal delivery, respectively. Sixty-three percent of category 1 caesarean section and 75% of category 1 vaginal delivery were performed in ≤30 min. Antenatal or intrapartum risk factors were present before the decision for delivery in 82% of caesarean sections and 80% of vaginal deliveries. The application of the Lucas urgency classification to assisted vaginal delivery merits further evaluation.