Abbott i-STAT 1 System Manual page 417

Method Comparison (mg/dL)
Beckman Coulter
LX20
n 39
Sxx 0.36
Syy 0.67
Slope 1.03
Int't 1.39
Sy.x 0.99
Xmin 5
Xmax 70
r 0.997
Cartridge Comparison
The performance characteristics of the sensors are equivalent in all cartridge configurations. System
difference analysis was performed on 40 patient samples using the i-STAT 6+ and i-STAT EC8+ cartridges.
In the 25–60 mg/dL range the average difference was -1.13. In the 60–140 mg/dL range the average
difference was -0.77.
Factors Affecting Results*
Endogenous ammonium ions will not affect results.
Interference studies were based on CLSI guideline EP7-A2.
CLSI guideline unless otherwise indicated.
When added to a plasma pool the following substances (at the concentrations indicated) were
found to interfere with the i-STAT BUN assay:
Substance
Bromide
Hydroxyurea
Nithiodote (sodium thiosulfate)
The following substances were shown not to significantly interfere with the i-STAT BUN assay at
the stated test concentrations:
Substance
Acetaminophen
Acetylcysteine
Ascorbate
Bromide
β-Hydroxybutyrate
Lactate
Salicylate
Rev. Date: 15-Jul-16
Dade Dimension
RxL-Xpand
®
32
0.48
0.34
1.05
-0.28
0.31
5
38
0.998
Test Concentration
(mmol/L)
37.5
0.92
16.7
Art: 714176-01Q
Beckman Coulter
CX9
® ®
26
0.39
0.60
1.00
-0.38
0.85
7
66
0.997
Test concentrations used were as per the
5
Use another method.
Increased i-STAT BUN/UREA results.
Decreased i-STAT BUN/UREA results.
7
Test Concentration
(mmol/L)
Interference
See Note 1 below.
See Note 2 below.
See Note 3 below.
1.32
10.2
0.34
2.5
6.0
6
6.6
4.34
BUN - 3