Electrolytes and fluids
Terms in this set (12)
Causes of euvolemic hyponatremia
Tea and toast diet
What is the maximum rate of sodium replacement in acute hyponatremia?
1-2 mmol/kg/hr and not more than 10 mmol/kg/day
What is the maximum rate of sodium replacement in chronic hyponatremia?
0.5-1 mmol/kg/hr and not more than 10mmol/kg/day
Daily sodium, potassium, magnesium and calcium requirement
Sodium : 1-2 mmol/kg/day
Potassium: 0.7-1 mmol/kg/day
Calcium and magnesium: 0. 1mmol/kg/day
How much maintenance fluid is required a day?
25-30ml/kg/day OR 1.5-2ml/kg/hr
What is the replacement ratio for colloids, crystalloids and blood products?
Colloids and blood 1:1
What is the usual rate of potassium replacement IV?
20mmol over 2 hours
Causes of SIADH?
Respi: Pneumonia, TB, Ventilation
CNS: Trauma, Tumour, Bleed, Meningitis
Malignancy: Small cell lung, Pancreatic adenoca, Lymphoma
Drugs: Anti-epileptics, Anti-depressants
Diagnosis of SIADH?
Hypotonic hyponatremia (true hyponatremia)
Normal thyroid, adrenal and renal function
Serum osmolality < 290
Urine osmolality > 300 and urine sodium > 30
Management of SIADH?
Fluid restriction < 1.5L/day
Isotonic / hypertonic saline with diuretics
Amount of sodium in 0.9% saline?
Amount of sodium in 3% saline?