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Urea and electrolytes. Resources. Common Patterns of Water and Electrolyte Change in Injury, Surgery and Disease (Moore, NEJM 1958) Fluid, Electrolyte, and Acid-Base emergencies (Morris, in Current Diagnosis and Treatment series, 2008)
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Resources Common Patterns of Water and Electrolyte Change in Injury, Surgery and Disease (Moore, NEJM 1958) Fluid, Electrolyte, and Acid-Base emergencies (Morris, in Current Diagnosis and Treatment series, 2008) Approach to Fluid and Electrolyte Disorders and Acid-Base Problems (Palmer, 2008) Oxford Handbook of Clinical Medicine 8e, p678
Normal, abnormal, and Dangerous results Total Ca++ is measured, but unbound Ca++ is the important factor. Albumin below 40g/L: add 0.1mmol/L to Ca++ for each 4 g/L albumin drop. Oxford handbook of clinical medicine, p679
Steps • Sodium relative to osmolarity • Chloride relative to sodium • Anion Gap ([Na] – [Cl] – [HCO3]) and pH • Potassium Approach to Fluid and Electrolyte Disorders and Acid-Base Problems (Palmer, 2008) Urea, creatinine, urea to creatinine ratio, gfr
Patterns? Oxford handbook of medicine 8e