Passport 12/Passport 8 Operator’s Manual 20-9
20.6.3 Calculated Parameters and Formulas
Abbreviation Unit Full spelling Formula
URNaEx mmol/24h urine sodium excretion Urine × URNa / 1000
URKEx mmol/24h urine potassium excretion Urine × URK / 1000
Na/K % sodium potassium ratio 100 × URNa / URK
CNa ml/24h clearance of sodium URNa × Urine / SerNa
Clcr ml/min creatinine clearance rate Ucr × Urine / Cr / (BSA / 1.73) / 1440
FENa % fractional excretion of sodium
100 × (URNa × Cr ) / (SerNa × Ucr)
Cosm ml/min osmolar clearance Uosm × Urine / Posm / 1440
CH
2
O ml/h free water clearance
Urine × (1－Uosm / Posm) / 24
U/P osm None urine to plasma osmolality ratio Uosm / Posm
BUN/Cr None* blood urea nitrogen creatinine ratio 1000 × BUN / Cr
U/Cr None urine-serum creatinine ratio Ucr / Cr
*: BUN/Cr is a ratio under the unit of mol.
20.7 Understanding the Review Window
With the review feature, you can review oxygenation, ventilation, hemodynamic and renal calculations. The review
window for each calculation is similar. Take the hemodynamic calculations review window for example, you can access
it by selecting [Review] in the [Hemodynamic Calculation] window.
In this review window:
You can select , or to view more values.
The values that exceed the range are displayed in a yellow background. The [Unit] field displays parameter units.
If some parameter values are outside of their normal ranges, you can view their normal range in the [Unit] field
by selecting [Range].
You can review an individual calculation by selecting its corresponding column and then selecting [Original
Calc]. You can record the currently displayed calculations or perform another calculation is this window.
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