Clinical skills: an evidence-based approach to preoperative fasting

Area of Science:

• Anesthesiology
• Patient Safety

Background:

• Prolonged preoperative fasting is a traditional practice to prevent aspiration pneumonitis (Mendelson's syndrome) during general anesthesia.
• Aspiration occurs when gastric contents move from the stomach to the lungs due to depressed pharyngeal and laryngeal reflexes during anesthesia induction.
• This can lead to serious lung inflammation, though it is a rare complication.

Purpose of the Study:

• To review current evidence regarding preoperative fasting durations.
• To investigate reasons behind the continued practice of prolonged preoperative fasting.
• To provide evidence-based recommendations for optimizing preoperative fasting protocols.

Main Methods:

• Literature review of current evidence on preoperative fasting times.
• Analysis of historical practices and their justification.
• Examination of risk factors and complications associated with fasting.

Main Results:

• Current evidence suggests patients are fasted for longer periods than necessary.
• Traditional practices may not align with the latest scientific findings on aspiration risk.
• Prolonged fasting can lead to increased patient discomfort and potentially other adverse effects.

Conclusions:

• Preoperative fasting times should be guided by current evidence rather than tradition.
• Optimizing fasting protocols can enhance patient comfort and safety.
• Recommendations are proposed to align clinical practice with scientific evidence.