Fasting before surgery: safe or risky? new study checks blood volume
NCT ID NCT01258361
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This study looked at whether not eating before surgery (preoperative fasting) causes low blood volume. Researchers used heart ultrasound to measure blood volume changes in 100 patients before and after fasting. The goal was to see if fasting increases the chance of low blood volume, which could affect surgery safety.
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 help refine preoperative fasting guidelines to reduce the risk of low blood volume during surgery.
What could go wrong
This is a small, completed observational study. Results may not apply to all patient groups or surgeries, and the measure of low blood volume is indirect.
Disclaimer
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Centre Hospitalier Universitaire de Nîmes
Nîmes, Gard, 30029, France