BeneVision N1 Patient Monitor Operator’s Manual
18 - 7
18.7
Renal Calculations
The monitor provides the renal calculation function. The monitor can save the results of up to 10 calculations,
which are displayed in groups.
18.7.1
Performing Renal Calculations
To perform renal calculations, follow this procedure:
1.
Access renal calculation by either of the following ways:
◆
Select the
Calculations
quick key
→
select the
Renal
tab.
◆
Select the
Main Menu
quick key
→
from the
Calculations
column
select
Renal
.
2.
Enter the known values. .
3.
Select
Calculate
.
The calculated value greater than the normal upper limit is indicated by an up arrow “
↑
”. The calculated
value lower than the normal lower limit is indicated by a down arrow “
↓
”. You can select
Range
to show the
normal range of each parameter.
18.7.2
Calculated Parameters and Formulas for Renal Calculations
18.7.3
Calculated Parameters and Formulas for Renal Calculations
volume of physiological
dead space
Vd
ml
Vd (ml) = TV (ml) × [1 - PeCO
2
(mmHg)/PaCO
2
(mmHg)]
physiologic dead space in
percent of tidal volume
Vd/Vt
%
Vd/Vt (%) = 100 × Vd (ml)/TV (ml)
alveolar volume
VA
L/min
VA (L/min) =[TV (ml) - Vd (ml)] × RR (rpm)/
1000
Calculated Parameters
Label
Unit
Formula
Input Parameter
Label
Unit
urine pstassium
URK
mmol/L
urinary sodium
URNa
mmol/L
urine
Urine
ml/24 hrs
plasm osmolality
Posm
mOsm/kgH
2
O
urine osmolality
Uosm
mOsm/kgH
2
O
serum sodium
SerNa
mmol/L
creatinine
Cr
μmol/L
urine creatinine
UCr
μmol/L
blood urea nitrogen
BUN
mmol/L
height
Height
cm
weight
Weight
kg
Calculated Parameters
Label
Unit
Formula
urine sodium excretion
URNaEx
mmol/24 hrs
URNaEx (mmol/24 hrs) = Urine (ml/24 hrs) ×
URNa (mmol/L)/1000
