Health

In this hospital, pulse oximeters went from overestimating to underestimating blood oxygen. Why?

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 06/10/2026, 14:37:24 UTC.

Briefings

A hospital study revealed that pulse oximeters shifted from overestimating to underestimating blood oxygen levels during the pandemic. This reversal occurred because the devices became more accurate for darker skin tones, which previously caused false high readings. The study highlights a critical shift in clinical accuracy for patients of color, potentially improving health outcomes by reducing the risk of misdiagnosing hypoxia. The research was conducted in 2026 and focuses on the specific mechanism of color-based calibration errors.

Key points

• Pulse oximeters shifted from overestimating to underestimating blood oxygen levels during the pandemic, specifically affecting darker skin tones.
• The study indicates that the devices became more accurate for darker skin tones, which previously caused false high readings and worsened health outcomes.

Context and limitations

The study covers only the period from 2026 and is limited to hospital settings; it does not account for other factors like device calibration errors or patient movement.

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