Preoperative assessment & management

Question 1

Adult maintenance fluid requirements

Answer 1

Na 50-100 mmol/day and K 40-80 mmol/day in 1.5-2.5L fluid per day.

Question 2

maintenance fluid to use?

Answer 2

4%/0.18% dextrose saline or 5% dextrose

Question 3

Avoid 0.9% N. Saline (due to risk of hyperchloraemic acidosis) unless

Answer 3

vomiting or has gastric drainage

Question 4

Excessive fluid losses from vomiting should be treated with a crystalloid with potassium replacement. 0.9% N. Saline should be given if there is

Answer 4

hypochloraemia