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Fasting before surgery: hidden danger for kids?

NCT ID NCT07259629

Completed Knowledge-focused Sponsor: Guy's and St Thomas' NHS Foundation Trust Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jul 23, 2026 · Updated 3 times

Summary

This study looks at how often children develop low blood sugar (hypoglycemia) after fasting before anesthesia for elective procedures. Researchers will monitor blood sugar levels in over 6,500 children aged 1 month to 18 years to find a clear definition of hypoglycemia and identify risk factors. The goal is to improve fasting guidelines and prevent harm.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to
If successful, this could lead to clearer safety guidelines for fasting before anesthesia in children, reducing the risk of low blood sugar.
What could go wrong
This is an observational study, not testing a treatment. It may not produce definitive results due to its large, diverse population and lack of a control group.

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Conditions

The condition(s) this trial relates to.

hypoglycemia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

ANESTHESIA HYPOGLYCEMIA; IATROGENIC PEDIATRICS

Contacts and locations

Locations

  • Addenbrooke's Hospital

    Cambridge, United Kingdom

  • Birmingham Women and Children's Hospital

    Birmingham, United Kingdom

  • Buckinghamshire Healthcare NHS Foundation Trust

    High Wycombe, United Kingdom

  • Chelsea and Westminster Hospital

    London, United Kingdom

  • Children's Hospital of Wales

    Cardiff, United Kingdom

  • Evelina London Children's Hospital

    London, SE17EH, United Kingdom

  • Great Northern Children's Hospital

    Newcastle, United Kingdom

  • James Cook University Hospital

    Middlesbrough, United Kingdom

  • King's College Hospital

    London, United Kingdom

  • Moorfields Eye Hospital

    London, EC1V 2PD, United Kingdom

  • Ninewells Tayside Hospital

    Dundee, United Kingdom

  • Nottingham Children's Hospital

    Nottingham, United Kingdom

  • Royal Aberdeen Infirmary

    Aberdeen, United Kingdom

  • Royal Belfast Hospital for Sick Children

    Belfast, United Kingdom

  • Royal Devon University Healthcare NHS Foundation Trust

    Exeter, Devon, EX2 5DW, United Kingdom

  • Royal Hospital for Children

    Glasgow, United Kingdom

  • Royal Hospital for Sick Children

    Edinburgh, United Kingdom

  • Royal London Hospital

    London, United Kingdom

  • Salisbury NHS Foundation Trust

    Salisbury, United Kingdom

  • Sheffield Children's Hospital

    Sheffield, United Kingdom

  • St George's Hospital

    London, United Kingdom

  • St Mary's Hospital

    London, United Kingdom

  • Ulster Hospital

    Belfast, United Kingdom

  • University hospital of Plymouth

    Plymouth, United Kingdom

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