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The use of pulse oximetry to exclude pneumonia in children
David A Tanen1, Douglas R Trocinski
1Department of Emergency Medicine, Naval Medical Center, San Diego, CA 92134-5000, USA. Dtanen@yahoo.com
Insights
Pulse oximetry is not a reliable predictor of pneumonia in young children with respiratory issues. This study found that normal oxygen saturation levels do not rule out pneumonia in children under two.
Area of Science:
- Pediatric Emergency Medicine
- Respiratory Illness Diagnostics
- Diagnostic Accuracy Studies
Background:
- Pneumonia is a common cause of respiratory complaints in young children presenting to emergency departments.
- Accurate and timely diagnosis is crucial for effective treatment and management.
- The role of pulse oximetry in diagnosing pediatric pneumonia requires further clarification.
Purpose of the Study:
- To evaluate the predictive value of pulse oximetry, alone or with clinical examination, for identifying pneumonia in children under 24 months.
- To compare pulse oximetry readings in children with and without radiographic pneumonia.
- To determine if pulse oximetry can be used to rule out pneumonia in this age group.
Main Methods:
- Retrospective chart review of 803 children under 24 months with respiratory complaints and chest radiography.
- Comparison of children with confirmed radiographic pneumonia versus those without.
- Data abstracted included pulse oximetry, vital signs, clinical appearance, lung exam, and radiograph interpretation.
Main Results:
- 10.5% of children had radiographic pneumonia.
- Median pulse oximetry was 97% in the pneumonia group vs. 98% in the control group.
- Pulse oximetry was not a statistically significant predictor of pneumonia; many children with pneumonia had normal or high oxygen saturation.
Conclusions:
- Pulse oximetry alone is not a reliable diagnostic tool for pneumonia in children under two with respiratory complaints.
- Normal pulse oximetry readings cannot rule out the presence of radiographic pneumonia in this population.
- Clinical examination and chest radiography remain essential for diagnosing pneumonia.
Abstract:
The objective of this study was to determine whether pulse oximetry alone or in conjunction with the clinical examination is predictive of pneumonia in children who present to the emergency department with respiratory complaints. A retrospective comparison of children with radiographic pneumonia with children with respiratory complaints and negative chest radiography was used. The study took place in an emergency department of a large academic, tertiary care hospital. All children less than 24 months of age who presented with a respiratory complaint and underwent chest radiography during a 1-year period were included. Charts of children with radiographic pneumonia were compared with charts of children without pneumonia, retrospectively. Data abstracted onto data collection forms included: pulse oximetry measurement, vital signs, general appearance, lung examination, and final radiology interpretation of chest radiographs. Pneumonia was defined as a chest radiograph showing any opacity consistent with pneumonia as read by a board-prepared or -certified radiologist. A total of 803 children qualified for the study. Radiograph interpretations were available for 762, and 10.5% were found to have radiographic pneumonia. The median pulse oximetry reading of children with radiographic pneumonia was 97% (interquartile range 95th-98th percentile) compared with 98% (interquartile range 96th-99th percentile) in the control group. Forty-five percent (35 of 78) of the children with radiographic pneumonia showed oxygen saturations of 98% or higher with greater than 10% (8 of 78) displaying oxygen saturations of 100%. By using logistic regression, pulse oximetry was not found to be a statistically significant predictive variable for radiographic pneumonia. Pulse oximetry could not be used to rule out the presence of radiographic pneumonia in children less than 2 years of age who presented with respiratory complaints.