Urine Osmolality and Electrolytes

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Treatment cautions • Dangerous to correct too correctly • Central pontine myelinolysis • ↑Na by 1-2 mmol/L/h, maximum of 8 mmol/L/day
Hypernatraemia • Very rarely need urine studies – Can be used as an adjunct study
Page 1 and 2: Urine Osmolality and Electrolytes W
Page 3 and 4: Definition • Concentration - Numb
Page 5 and 6: Osmolality Measurement FP↓ ΔT
Page 8 and 9: Temp Freezing point osmometry liqui
Page 10 and 11: Specimen
Page 12 and 13: Methods • Freezing point depressi
Page 14 and 15: Specimen • No special preparation
Page 16 and 17: Urine Osmolaltiy • Typical values
Page 18 and 19: Urine Osmolality Cautions • EtOH
Page 20 and 21: Faecal specimens • Rare test for
Page 22 and 23: Polyuria
Page 24 and 25: Normal Urine Output • 800 mL/d is
Page 26 and 27: Water Balance • Metabolism 10% 25
Page 28 and 29: Assessing Intravascular Volume •
Page 30 and 31: Polyuria Assessment osmolality Poly
Page 32 and 33: Polyuria U.Osm 300 “water” diur
Page 34 and 35: Water Deprivation Test U.osm 1200 n
Page 36 and 37: Hyponatraemia
Page 38 and 39: Urine Sodium 70-80% Freely filtered
Page 40 and 41: Case • 6 month old with astrocyto
Page 42 and 43: Case… • SIADH: - Kidneys act to
Page 44 and 45: SIADH Causes • Tumour - Small cel
Page 46 and 47: Cautions • No renal or adrenal pr
Page 50 and 51: Urine Potassium • Less predictabl
Page 52 and 53: Renal Failure Classifications • D
Page 54 and 55: Fractional Excretion • Corrects f
Page 56 and 57: Case #2 • 50 y.o. goes to the ER
Page 58 and 59: Caution • Loop diuretics increase
Page 60 and 61: Metabolic Acidosis • Increased an
Page 62 and 63: Renal Acid-Base: Recovery Blood Ren
Page 64 and 65: Ammonia • Theoretically can be me
Page 66 and 67: Electroneutrality + Na + + K + + 2C
Page 68 and 69: Non-Anion gap Metabolic Acidosis Na
Page 70 and 71: Urine Osmolality & Lytes Utility

Urine Osmolality and Electrolytes

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