Purpose: Patient outcome during an obstetrical emergency depends on prompt coordination of an interprofessional team. The cognitive aids with roles defined (CARD) is a cognitive aid that addresses the issue of teamwork in crisis management. This study evaluated the clinical impact of implementing the CARD cognitive aid during emergency Cesarean deliveries.

Methods: We conducted a prospective before-and-after cohort trial at the maternity units of two Canadian academic hospital campuses. Both sites received didactic online training regarding teamwork during crises, which involved training on using CARD for the "CARD" campus (intervention) and no mention of CARD at the "no CARD" campus (control). The primary outcome was the total time to delivery after the call for an emergency Cesarean delivery. Secondary outcomes included specific intervals of time within the time to delivery and clinical outcomes for both the babies and mothers.

Results: We analyzed data from 267 eligible emergency Cesarean deliveries that occurred between January 11 2014 and December 31 2017. The use of CARD did not significantly change the median [interquartile range] time to delivery of the baby during an emergency Cesarean delivery from the pre-intervention to the post-intervention time period (17 [12-28] vs 15 [13-20], respectively; median difference, 2; 95% confidence interval, -1 to 5; P = 0.36). The clinical outcomes for the baby or the mother and other secondary outcomes also did not change.

Conclusions: The CARD cognitive aid did not significantly improve time-based or clinical maternal and neonatal outcomes of emergency Cesarean delivery at our academic maternity unit.