Table 5. Estimates of between-device within-brand variation expressed as a) standard deviation and b) coefficient of variation (%) based on means of Radiometer ABL90.
Analyser
Brand |
|
Lactate concentration band (mM) |
| 0-1.9 |
2.0-4.9 |
5.0-9.9 |
10.0-14.9 |
15+ |
All |
| Standard deviation (mM) |
| Edge |
.00 |
.00 |
.01 |
.06 |
.00 |
.03 |
| i-STAT |
.00 |
.20 |
.00 |
.19* |
.00 |
.00 |
| Lactate Pro |
.07† |
.14‡ |
.30‡ |
.37‡ |
.54‡ |
.32‡ |
| Lactate Pro2 |
.00 |
.00 |
.08† |
.00 |
.00 |
.00 |
| Radiometera |
|
.05 |
.14 |
|
.15 |
.00 |
| Scout+ |
.01 |
.05 |
.02 |
.00 |
.00 |
.00 |
| Xpress |
.00 |
.00 |
.00 |
.13 |
.27* |
.11 |
|
Coefficient of variation (%) |
| Edge |
.0 |
.0 |
.1 |
.5 |
.0 |
.3 |
| i-STAT |
.0 |
5.7 |
.0 |
1.5 |
.0 |
.0 |
| Lactate Pro |
5.0 |
4.1 |
3.8 |
3.0 |
2.7 |
3.6 |
| Lactate Pro2 |
.0 |
.0 |
1.0 |
.0 |
.0 |
.0 |
| Radiometera |
|
1.5 |
1.7 |
|
.8 |
.0 |
| Scout+ |
.8 |
1.3 |
.3 |
.0 |
.0 |
.0 |
| Xpress |
.0 |
.0 |
.0 |
1.1 |
1.4 |
1.2 |
*p < 0.05† p < 0.01‡ p < 0.001.
a Comparison between Radiometer 715 versus the criterion Radiometer ABL90.
