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How common is intraoperative pain occur during caesarean delivery surgery when the patient is awake and what is the impact on mothers?

Snapshot obstetric national anaesthetic research project 1 (SONAR-1)

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN15269213
Enrollment
1500
Registered
2025-03-24
Start date
2025-03-17
Completion date
Unknown
Last updated
2025-09-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Reproductive health and childbirth Pregnancy and Childbirth

Interventions

SONAR-1 is a study of obstetric patients undergoing caesarean sections (CS) in participating hospitals to understand how common intraoperative pain and inadequate neuraxial anaesthesia (NA)(where the

Sponsors

University College London
Lead Sponsor

Eligibility

Sex/Gender
Female

Inclusion criteria

Inclusion criteria: 1. Aged 18 years or above 2. Gestation beyond 32/40 weeks 3. Receiving NA (spinal, labour epidural extended for surgical anaesthesia or combined spinal epidural) 4. Receiving any scheduled or unscheduled CS of any category

Exclusion criteria

Exclusion criteria: 1. Patient refusal 2. Patients who are unable to provide informed consent 3. Other modes of delivery (e.g., instrumental delivery) 4. De novo GA as an anaesthetic method

Design outcomes

Primary

MeasureTime frame
The incidence of patient-reported intraoperative pain during caesarean delivery performed with neuraxial anaesthesia

Secondary

MeasureTime frame
1. Pain measured using the visual analog scale at 24 hours (+/- 6 hours) after delivery of the baby 2. Maternal satisfaction measured using the Maternal Satisfaction questionnaire tool at 24 hours (+/- 6 hours) after delivery of the baby 3. Pain measured using the visual analog scale at 6 weeks (+/- 3 days) after delivery of the baby 4. Anxiety measured using the Generalised Anxiety Disorder Scale (GAD7) at 6 weeks (+/- 3 days) after delivery of the baby 5. Post-traumatic stress measured using the Post-Traumatic Stress Checklist (PCL-5) at 6 weeks (+/- 3 days) after delivery of the baby 6. Depression measured using the Edinburgh Postnatal Depression Score (EPDS) at 6 weeks (+/- 3 days) after delivery of the baby

Countries

Australia, England, Northern Ireland, Scotland, United Kingdom, Wales

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026