Post Operative Fluid Management

Question 1

Daily Requirements: Water, Na, K?

Answer 1

Water: 30-40 ml/kg
Sodium: 1.5-2 mmol/kg
Potassium: 1 mmol/kg

Question 2

What are the components of normal Saline? (500 ml bag)

Answer 2

Na: 153 mmol/L
Cl: 153 mmol/L

Can add K+ (20-40 mol/L)

Question 3

What are the components of Hartmanns?

Answer 3

Na: 130 mmol/L
K+ : 4 mmol/L
Cl: 111 mmol/L
Ca: 2 mmol/L
HCO3 (as LACTATE): 29 mmol/L

Question 4

What are the components of Dextrose 5%?

Answer 4

Water, no electrolytes

Question 5

What are the components of Dexsaline?

Answer 5

Na: 30 mmol/L
Cl- : 30 mmol/L

Can add K+ (20-40 mol/L)

Question 6

What can Saline/Hartmanns cause?

Answer 6

Hypernatraemia

Question 7

What are the components of plasma?

Answer 7

Na: 137-147
K: 4-5.5
Cl : 95-105
Bicarbonate: 22-25

Question 8

Infusion rate when setting up fluids?

Answer 8

20 drops = 1ml

Rate of 1 drop per second = 1ml/20 sec

Therefore: 3ml/min and 180 ml/hr