Product Manual

Patient Monitor User Manual Calculation
- 138 -
Items
Unit
English Full
Name/Description
Formula
URKEx
mmol/24h
Urine potassium
excretion
URKEx= URK* Urine/1000
Na/K
%
Sodium
potassium ratio
Na/K =URNa/ URK*100
CNa
ml/24h
Clearance of
sodium
CNa= URNa* Urine]/ SerNa
CCr
ml/min
Creatinine
clearance rate
CCr=( UCr* Urine)/( SCr*24*60)
CUUN
ml/min
Urine urea
nitrogen
clearance rate
CUUN= UUN* Urine/( BUN*24*60)
FENa
%
Fractional
excretion of
sodium
FENa=( URNa* SCr)/( UCr* SerNa)*100%
FEUr
%
Fractional
Excretion of
Urea
FEUr=( SCr* UUN)/( UCr * BUN)*100%
Cosm
ml/min
Osmolar
clearance
Cosm=( Uosm* Urine)/( Posm*24*60)
CH
2
O
ml/24h
Free water
clearance
CH
2
O=( Urine-Uosm)* Urine/ Posm
U/P osm
/
Urine to plasma
osmolality ratio
U/P osm= Uosm/ Posm
BUN/SCr
/
Blood urea
nitrogen
creatinine ratio
BUN/SCr= (BUN/ SCr)*1000
U/SCr
/
Urine-serum
creatinine ratio
U/SCr= UCr/ SCr