Calculate the FENa%. Using this and at least one other variable/calculation iden

Question

Calculate the FENa%. Using this and at least one other variable/calculation identify and explain the type of acute kidney injury occurring in this patient.

Two years after the initial appointment the man presents at the hospital. He has been vomiting for two days following a fishing trip and has reported large amounts of bloodin vomit (suspected gastroesophageal variceal bleeding). He now weighs 102kg and presented with low blood pressure onadmission. Use the results from blood and urine analysis below for the rest of the calculations. Plasma Urine Result 126 mmol/L 133-143 6.4 mmol/L 3.6-4.6 12 mmol/L 24-32 93 mmol/L 98-108 15 mmol/L 3.0-7.0 30 mmH 200umol/L 60-120 Reference Range Result 3+ Positive Reference Range Dipstick Protein Blood Albumin/Creatinine 0.41g/g

Explanation / Answer

FENa % can be calculated by using the formula:

[SodiumUrea * CreatininePlasma / SodiumPlasma * CreatinineUrine] * 100

As Plasma creatinine units is in micromol/l so they are converted ot mmol/litre so the value becomes 0.2mmol/l

by putting values in the formula

[14 * 0.2 / 126 * 9] * 100

= 0.2469

=0.25 percent

As the potassium level is also high so by acute kidney disease likely to occur to the patient is hyperkalemia

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