26 Jul Pair participants had a premier haemoglobin concentration, and that worthy of try forgotten into the step step step one1% of the users
Contrary to our previous study, we did in the current study not find that increased haemoglobin concentration was significantly associated with low SpOdos. This might explain the lack of association in this study.
In a recent study, Smith et al. reported increased mortality rates in hospitalized patients with an SpO2 < 96%. Increased mortality has also been found in emergency care patients with a low SpO2 [8,9]. SpO2 may be a good predictor of mortality in situations where spirometry is not available and in populations with a higher frequency of low SpO2, especially when used as part of a risk-scoring system.
Pros and cons
This study was based on a single-point measurement of SpO2. We have not checked the reproducibility, but we know that the group with the lowest SpO2 (?92%) in the follow-up examinations also showed consistently low values for SaO2 in blood gas analysis. Oxygen saturation can vary during the day, especially during activity and at night in people with a pulmonary disease such as COPD . Baseline SpO2 (at rest) has been shown to predict oxygen desaturation during activity and at night . SpO2 can also be in the normal range even though FEV1% predicted is <50%.
The measurement of SpO2 could be a limitation because the accuracy of the device is ±2 digits.