Basic Concepts of Fluid and Electrolyte Therapy
Basic Concepts of Fluid and Electrolyte Therapy
Basic Concepts of Fluid and Electrolyte Therapy
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Urinary electrolytes<br />
The measurement <strong>of</strong> urinary electrolytes <strong>and</strong> osmolality can be used<br />
to distinguish pre-renal AKI from intrinsic AKI (Table 22). The measurements<br />
<strong>of</strong> urinary sodium are not accurate if loop diuretics have<br />
been administered within the previous 12 hours or there is pre-existing<br />
chronic kidney disease.<br />
Table 22: Distinguishing pre-renal from intrinsic AKI<br />
Parameter Pre-renal Intrinsic<br />
Urine sodium (mmol/l) 40<br />
Urine osmolarity (mOsm/l) >500 8 40
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