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Fast breathing in the diagnosis of pneumonia--a reassessment
D Gupta1, S Mishra, P Chaturvedi
1Department of Paediatrics, Mahatma Gandhi Institute of Medical Sciences Sevagram, Wardha, India.
Insights
Fast breathing is a key indicator for diagnosing pneumonia in children, with specific rates varying by age. This study evaluated clinical signs against chest X-rays to confirm lower respiratory infections.
Area of Science:
- Pediatrics
- Respiratory Medicine
- Diagnostic Imaging
Background:
- Lower respiratory infections (LRI) are a significant cause of childhood illness.
- Accurate and timely diagnosis of pneumonia is crucial for effective treatment.
- Clinical signs are often used to diagnose pneumonia, but their diagnostic utility varies.
Purpose of the Study:
- To assess the diagnostic utility of clinical symptoms and signs in children with cough and/or breathlessness.
- To compare clinical findings with radiological evidence of pneumonia.
Main Methods:
- A prospective hospital-based study involving 222 children with respiratory symptoms.
- Clinical assessment of lower respiratory infection (LRI) and upper respiratory infection (URI) cases.
- Pneumonia diagnosis confirmed by chest roentgenograms (abnormal shadows).
Main Results:
- Fast breathing was the most sensitive predictor of pneumonia across all age groups.
- Specific cut-off points for fast breathing were identified: 50 breaths/min (infants), 40 breaths/min (12-35 months), and 30 breaths/min (36-60 months).
- Crepitations on auscultation correlated well with radiological pneumonia; chest indrawing and cyanosis were specific but less sensitive.
Conclusions:
- Fast breathing is a highly valuable clinical sign for diagnosing pneumonia in children.
- Established respiratory rate cut-offs can aid in identifying pneumonia.
- While some signs are specific, a combination of clinical assessment and radiological confirmation is optimal for pneumonia diagnosis.
Abstract:
In this hospital-based prospective study, a total of 222 children presenting with cough and/or breathlessness were screened for presence of lower respiratory infection. All clinically-detected cases of LRI and every fifth case of URI were investigated. Pneumonia was defined as presence of abnormal shadows on chest roentgenograms, against which the clinical symptoms and signs were assessed for their utility in the diagnosis of pneumonia. Fast breathing was found to be the most useful sign predicting pneumonia in all age groups. Cut-off points at 50 breaths/min for infants including neonates, 40 breaths/min for children aged 12-35 months, and 30 breaths/min for children aged 36-60 months indicated presence of pneumonia. Crepitations on auscultation of chest was found to have good correlation with presence of radiological pneumonia. Other signs like chest indrawing and cyanosis were found to be highly specific signs in detecting pneumonia, but had low sensitivity.