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To investigate current target decision to delivery intervals (DDIs) for 'emergency' caesarean section.Prospective observational cohort study in a teaching hospital providing district and tertiary maternity services delivering 6000 babies per annum.68% Category 1 deliveries were achieved within 30min and 66% Category 2 within 75min (26% for antepartum Category 2 deliveries). Category 1 deliveries were quicker using general rather than regional anaesthesia (21 vs. 29min, odds ratio [OR] for delivery <30min 4.2, 95%CI 1.3-14.2). 8% Category 1 and 4% Category 2 neonates were acidotic or asphyxiated. The risk of acidosis was not reduced by delivery within 30min for Category 1 (OR 0.56; 0.11-2.81), or within 75min for Category 2 (OR 2.72; 0.6-25.1). Three babies were registered with developmental impairment by three years of age; none were Category 1 deliveries.Our data suggest that clinical triage is effective, with the more compromised fetus delivered more rapidly using general anaesthesia. For Category 1 deliveries a 30min target DDI is appropriate, although those born after longer DDI did not show developmental impairment. For Category 2 caesarean sections performed for acute fetal distress or concerns, failed instrumental delivery, failure to progress or placental bleeding, a 75min DDI may be an appropriate target but did not protect against acidosis, asphyxia or developmental impairment. Longer DDIs did not result in unfavourable outcomes for other Category 2 indications.

Original publication




Journal article


European journal of obstetrics, gynecology, and reproductive biology

Publication Date





276 - 281


Department of Obstetrics and Gynaecology, North Devon District Hospital, Barnstaple, Devon, UK.


Humans, Pregnancy Complications, Asphyxia Neonatorum, Acidosis, Apgar Score, Pregnancy Outcome, Anesthesia, Obstetrical, Cesarean Section, Cohort Studies, Follow-Up Studies, Prospective Studies, Child Development, Pregnancy, Time Factors, Infant, Newborn, Hospitals, Teaching, Triage, Female, Male, United Kingdom