Preoperative fasting and oral fluids

Preoperative fasting is necessary for a range of patient cohorts. This set of resources provides guidelines for safe preoperative fasting and fluid diets in operating theatres in NSW hospitals.

The aims of these resources are to:

  • minimise cancellations of surgery as result of fasting interpretation by clinicians
  • provide better quality of care to patients, particularly the frail aged
  • help facilities achieve the Delirium clinical care standard from the Australian Commission of Quality and Safety in Healthcare.

Implementation tools

Key principles for preoperative fasting

Published: May 2016. Next review: 2024.

Understand the principles, timelines and patient cohort considerations of preoperative fasting to prepare patients for surgery.

Download the key principles (PDF 220.9 KB)


Frequently asked questions – preoperative oral fluids

Published: January 2016. Next review: 2024.

Read this background to the diet specifications to support their use at your hospital.

Download the frequently asked questions (PDF 116.3 KB)

Diet specifications

These diet specifications help hospital staff prepare patients for surgery and some procedures.

Fluid diet - preoperative oral

Published: May 2016.

A diet which continues oral fluids until two hours before a procedure to replace or maintain the body’s water balance and leave minimal residue in the stomach.

View the preoperative oral fluiddiet specification

Fluid diet - preoperative oral diabetes

Published: May 2016.

A diet which continues oral fluids for people with diabetes until two hours before a procedure to replace or maintain the body’s water balance and leave minimal residue in the stomach.

View the preoperative oral diabete fluiddiet specification

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