SI units

The equations stated above are based on the SI unit system. If parameters are known in other units, they must be converted into an SI unit before entering the equations. The result will be in an SI unit.

After the calculation the result may be converted to the desired unit. Conversion of units may be performed using the equations stated below:

Temperature

T (°F)

T (°C)

=

=

cK⁺, cNa⁺, cCl^–

cX (meq/L)

=

cX (mmol/L) where X is K⁺, Na⁺ or Cl^-.

cCa²⁺

cCa²⁺ (meq/L)
cCa²⁺ (mg/dL)
cCa²⁺ (mmol/L)
cCa²⁺ (mmol/L)

=
=
=
=

2 × cCa²⁺ (mmol/L) or
4.008 × cCa²⁺ (mmol/L)
0.5 × cCa²⁺ (meq/L)or
0.2495 × cCa²⁺ (mg/dL)

Pressure

p (mmHg)
p (kPa)

=
=

p (torr) = 7.500638  × p (kPa)
0.133322  × p (mmHg) = 0.133322  × p (torr)

ctHb

ctHb (g/dL)
ctHb (g/L)
ctHb (mmol/L)
ctHb (mmol/L)

1.61140 × ctHb (mmol/L)
16.1140 × ctHb (mmol/L) or
0.62058 × ctHb (g/dL)
0.062058 × ctHb (g/L)

ctCO₂, ctO₂,
ctO₂(a-),
BO₂

ctCO₂ (Vol %)
ctO₂ (Vol %)
ctO₂ (Vol %)

=
=
=

2.241 × ctCO₂ (mmol/L)
ctO₂ (mL/dL)
2.241 × ctO₂ (mmol/L)

O₂

O₂ (mmol/L)/min

=

O₂ [(mL/L)/min]/22.41

cGlucose

cGlucose (mg/dL)
cGlucose (mmol/L)

=
=

18.016 × cGlucose (mmol/L) or
0.055506 × cGlucose (mg/dL)

cLactate

cLactate (mg/dL)
cLactate (mmol/L)
cLactate (meq/L)

=
=
=

9.008 × cLactate (mmol/L) or
0.11101 × cLactate (mg/dL)
cLactate (mmol/L)

ctBil

ctBil (µmol/L)
ctBil (µmol/L)
ctBil (mg/dL)
ctBil (mg/L)

=
=
=
=

17.1 × ctBil (mg/dL)
1.71 × ctBil (mg/L) or
0.0585 × ctBil (µmol/L)
0.585 × ctBil (µmol/L)

NOTE:

All conversions of units are made by the analyzer.

Default values

Values

The following default values are used by the analyzers, if other values are not keyed in.

T
FO₂(I)
RQ
ctHb
FCOHb

=
=
=
=
=

37.0 °C (98.6 °F)
0.21 (21.0 %)
0.86
9.3087 mmol/L, (15.00 g/dL or 150 g/L)
0.004 (0.4 %)