Compensatory fluid administration for preoperative dehydration--does it improve outcome?

Area of Science:

• Anesthesiology
• Perioperative Medicine
• Fluid Management

Background:

• Preoperative fasting can cause significant fluid deficits (approx. 1 litre).
• This dehydration may increase perioperative discomfort and morbidity.
• The study investigates fluid administration to mitigate these effects.

Purpose of the Study:

• To examine the association between perioperative fluid administration and clinical outcomes.
• To assess the impact of fluids on correcting preoperative dehydration.
• To determine optimal fluid volumes for improving patient recovery.

Main Methods:

• Systematic review of randomized controlled trials (RCTs).
• Searched Medline (1966-2001) and cited references.
• Included 17 trials comparing fluid vs. no fluid administration pre- or intraoperatively.

Main Results:

• Low-dose fluid (<1 litre) reduced preoperative thirst.
• Higher fluid doses (>=1 litre) generally reduced postoperative drowsiness and dizziness.
• Effects on postoperative nausea, vomiting, and thirst were not definitively clarified for higher doses.

Conclusions:

• Fluid administration effectively compensates for preoperative dehydration.
• Approximately 1 litre of fluid administered pre- or intraoperatively is rational for patients fasting for minor surgery.
• Further research may clarify effects on specific postoperative symptoms.