Table 2.
Exposure of instruments or supplies to elevated temperature for up to 3 wk and effect on measured hemoglobin concentrations (g/L): mean (SD)
| HemoCue® model | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Hb-201+ | Hb-301 | ||||||||
| Condition | Specimen(s) | Time, wk | Time, wk | ||||||
| 0 | 1 | 2 | 3 | 0 | 1 | 2 | 3 | ||
| Analyzers at 37°Ca | Level 1 | 73.5 (2.4) | 72.5 (1.3) | 73.5 (1.7) | 75.0 (2.8) | 79.8 (0.5) | 80.3 (1.0) | 80.8 (2.1) | 79.8 (0.5) |
| Level 2 | 132 (2.4) | 133 (2.7) | 131 (0.5) | 133 (3.2) | 119 (1.3) | 118 (0.6) | 118 (1.0) | 118 (1.3) | |
| Level 3 | 174 (3.2) | 175 (2.9) | 175 (3.0) | 173 (2.8) | 160 (1.3) | 159 (1.2) | 159 (1.8) | 158 (1.3) | |
| Cuvettes at 37°Cb | Venous blood | 143 (12) | 141 (11) | 142 (11) | 144 (12) | 147 (11) | 147 (11) | 148 (11) | 148 (11) |
| Control materials at 32°Cc | Level 1 | n.m. | n.m. | n.m. | n.m. | 71.0 (2.8) | 70.5 (2.1) | 71.5 (3.5) | 72.0 (2.8) |
| Level 2 | n.m. | n.m. | n.m. | n.m. | 132 (4.2) | 133 (1.4) | 134 (3.5) | 134 (2.8) | |
| Level 3 | n.m. | n.m. | n.m. | n.m. | 170 (1.4) | 172 (2.8) | 172 (4.2) | 172 (3.5) | |
a
Analysis of 3 HemoCue® controls by 2 analyzers per model and 2 readings per analyzer (n=4)
b
Analysis of 24 venous blood specimens by 1 analyzer per model and 2 readings per analyzer (n=2)
c
Analysis of 3 HemoCue® controls by 2 analyzers for model Hb-301 and 1 reading per analyzer (n=2); n.m., not measured for model Hb-201+