Calculations
In the Calculations menu, you can perform several calculations frequently used in ICU, related to renal function.
Cockroft-Gault calculation to estimate a patient's renal function at baseline. It is not advisable to use in a patient admitted to the ICU.
On the right is shown the help with the formula and reference.
MDRD calculation for estimating a patient's renal function at baseline. It is not advisable to use in a patient admitted to the ICU.
On the right is shown the help with the formula and reference.
Calculation of the fractional excretion of Na (EFNa), used to differentiate between renal or pre-renal dysfunction.
On the right is shown the help with the formula and reference.
Calculation of Anion Gap.
On the right is shown the help with the formula and reference.
Calculation of creatinine clearance. This is the best parameter to use in ICU patients to measure kidney function. You need a sample of urine and blood, and the collection time.
It allows to estimate renal function in a variable period of urine collection if you do not want to wait 24 hours.
On the right is shown the help with the formula.
Calculation of plasma osmolality with Na, urea and glucose.
On the right is shown the help with the formula.
Calculation of urinary osmolality with Na, urea and glucose.
On the right is shown the help with the formula.
Calculation of Na deficit in a patient with hyponatremia. Introducing Na obtained by laboratory and desired Na and knowing the weight of the patient, you can know the total amount of mmol or mEq of Na needed to manage the patient to its normal value. Remember that the replacement should be done slowly over time.
On the right is shown the help with the formula and reference.
Calculation of water deficit that causes significant hypernatremia. Introducing Na obtained by laboratory and desired Na and knowing the weight of the patient, you can know the total amount of mL of water needed to manage the hypernatremia. Remember to replace fluids with caution.
On the right is shown the help with the formula and reference.
Bicarbonate deficit calculation. Introducing HCO3- obtained by laboratory and desired HCO3- and knowing the weight of the patient, you can know the total amount of mmol or mEq of HCO3Na needed to compensate metabolic acidosis.
On the right is shown the help with the formula and reference.
Recirculation rate. The calculation of recirculation rate is done by dividing Patient urea minus Arterial urea branch into Patient urea minus Vein urea branch. If a jugular catheter is used the normal value is lower than 10% and if a femoral catheter is used, the normal value is lower than 15%. When these values are higher the background turn red.
