Adjustments - Abbott i-STAT Alinity Operation Manual

188

Adjustments

The settings for result displays of base excess and eGFR (Estimated Glomerular Filtration Rate) are
determined in this tab.
BE Equation
eGFR Equation
eGFR Variants
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i-STAT Alinity — System Operations Manual
Base excess of the extracellular fluid or standard base excess is the
concentration of titratable base minus the concentration of titratable
acid when titrating the average intracellular fluid (plasma plus interstitial
fluid) to an arterial plasma pH of 7.40 at PCO
Excess concentration of base in the average ECF remains virtually
constant during acute changes in the PCO
nonrespiratory component of pH disturbances. Select either option:
Extra Cellular Fluid
Base Excess of Extracellular Fluid (BEecf)
BEecf = HCO – 24.8 + 16.2 (pH – 7.4)
3
This is the default.
Blood
Base Excess of Blood (BEb)
BEb = (1 - 0.014*Hb) * [HCO
+ 7.7) * (pH - 7.4)]
MDRD (default)
CKD-EPI 2009
Select one of these options:
Display both eGFR and Black/African American eGFR
Display only eGFR
Display only Black/African American eGFR
Note: Black/African American eGFR displays as eGFR-a on the
instrument screen.
Art: 746300-01 Rev. N
of 40 mmHg at 37°C.
2
and reflects only
2
- 24.8 + (1.43 * Hb
3
Rev. Date: 02-Nov-2022