review · The Lancet Global Health
Pulse oximeters are standard tools for measuring blood oxygen levels in hospitals, but their utility in primary care and outpatient settings is less established. An evaluation of clinical data across diverse low-income and middle-income settings demonstrates that children with both moderate hypoxaemia, defined as oxygen saturation between 90% and 93%, and severe hypoxaemia, defined as saturation below 90%, face an increased risk of mortality. Based on these findings, pulse oximetry can serve a vital role in patient risk-stratification outside intensive hospital environments. Detecting moderate hypoxaemia at the primary care level should trigger thorough re-assessment, potential referral, and vigilant patient monitoring. Moving away from rigid binary thresholds towards a more nuanced approach offers practical guidance for frontline healthcare workers managing severely ill paediatric patients.
In low-resource healthcare settings, identifying critically ill children early is essential for preventing fatalities. Expanding the role of pulse oximetry to primary care facilities allows community health workers to spot dangerous oxygen drops earlier. Shifting away from all-or-nothing thresholds ensures children with moderate oxygen deficits receive timely medical evaluations and interventions before their condition becomes fatal.
The abstract describes clinical guidance and risk-stratification protocols rather than a proprietary product. The findings could inform clinical decision-support tools, triage software, and diagnostic protocols for primary healthcare workers. Because the research focuses on refining practice and interpretation using existing pulse oximeter hardware, application pathways are tied to clinical training programmes and guideline adoption rather than standalone commercial hardware development.
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Pulse oximeters are essential for assessing blood oxygen levels in emergency departments, operating theatres, and hospital wards.However, although the role of pulse oximeters in detecting hypoxaemia and guiding oxygen therapy is widely recognised, their role in primary care settings is less clear.In this Viewpoint, we argue that pulse oximeters have a crucial role in risk-stratification in both hospital and primary care or outpatient settings.Our reanalysis of hospital and primary care data from diverse low-income and middle-income settings shows elevated risk of death for children with moderate hypoxaemia (ie, peripheral oxygen saturations [SpO 2 ] 90-93%) and severe hypoxaemia (ie, SpO 2 <90%).We suggest that moderate hypoxaemia in the primary care setting should prompt careful clinical re-assessment, consideration of referral, and close follow-up.We provide practical guidance to better support frontline health-care workers to use pulse oximetry, including rethinking traditional binary SpO 2 thresholds and promoting a more nuanced approach to identification and emergency treatment of the severely ill child.
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DOI: 10.1016/s2214-109x(24)00209-2
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