Fluid and Electrolyte Balance

Losses

• Water - 2.5 L/day
• Na+ - 100mmol/day
• K+ 80 mmol/day

Daily regime

• 1l Normal saline + 40mmol KCl
• 1l 5% dextrose + 40mmol KCl
• 1l 5% dextrose
  • Each given over 8 hours

Imbalances

• Dehydration
• Fluid Overload
• Hyponatraemia
• Hypernatraemia
• Hypokalaemia
• Hyperkalaemia

Changes in Major Surgery / Trauma

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