Fluids

Question 1

What is the minimum urine output before it may indicate hypovolaemia

Answer 1

0.5ml/kg/hour

Question 2

What is the average water requirement for a 70kg man?

Answer 2

2000-2500 ml per day

Question 3

What is the daily sodium and potassium requirement?

Answer 3

1-2 mmol/kg (about 80mmols sodium + 60mmols potassium per day)

Question 4

What are the three compartments in the body?

Answer 4

• ICF (2/3rds of the total body water)

- ECF (1/3) broken down into plasma and interstitial fluid

Question 5

Which compartments are depleted in dehydration?

Answer 5

All

Question 6

Which compartment will be depleted in hypovolemia?

Answer 6

Plasma - initially depleted before fluid moves in from elsewhere

Question 7

Which compartments will be depleted in vomiting and diarrhea?

Answer 7

Plasma and interstitial compartment

Question 8

What compartment will have a fluid increase if you infuse saline or Hartmanns

Answer 8

ECF - plasma and interstitial compartment

Question 9

What happens if you infuse 5% glucose?

Answer 9

All compartments increase equally