The values labeled "Typical" in the table below were obtained by averaging the readings obtained by performing the SmartSat's Probe Sensitivity test on a large number of good pulse oximeter probes. The values labeled "Typical Range" are values at which, when the "probe under test" measures outside this range, it should be considered suspect. Since the pulse oximeter manufacturers have thus far declined to provide absolute limits for these ranges, we can not positively state that probes that exceed these limits are "bad." However, we can state that they deviate significantly from the "typical" probes of that make and model. In general, when evaluating probes using the Probe Sensitivity test, if you obtain a reading outside the limits, you should take into account other factors. For example, multiple readings (such as Red and Ratio) outside the limits or an out-of-limit reading on a probe that is old or looks worn, is probably an indication of a probe that may malfunction under certain clinical conditions.
| Probe Model | Nellcor DS-100A | Ohmeda Clip Tip |
| Red Typical | 158 | 168 |
| Red Typical Range | >79 | >168 |
| IR Typical | 262 | 268 |
| IR Typical Range | >196 | >244 |
| Ratio Typical | 60 | 63 |
| Ratio Typical Range | 30 to 90 | 40 to 100 |
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