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¿Este niño tiene neumonía? : La revisión sistemática del examen clínico racional
Sonal N Shah1, Richard G Bachur1, David L Simel2,3
1Division of Emergency Medicine, Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts.
JAMA
|August 2, 2017
Resumen
La hipoxia y el aumento del trabajo respiratorio son indicadores clave para el diagnóstico de la neumonía en niños. Si bien los síntomas comunes como la fiebre y la taquipnea son menos confiables, estos signos ayudan a los médicos a identificar la neumonía con mayor precisión.
Área de la Ciencia:
- Medicina pediátrica
- Precisión del diagnóstico
- Enfermedades respiratorias
Sus antecedentes:
- La neumonía es una causa importante de enfermedad y muerte infantil.
- El diagnóstico preciso es crucial para prevenir resultados graves y reducir el uso excesivo de antibióticos.
Objetivo del estudio:
- Revisar sistemáticamente la exactitud del diagnóstico de los síntomas clínicos y los hallazgos del examen físico para identificar la neumonía radiográfica en niños.
- Evaluar la eficacia de varios signos para diferenciar la neumonía de otras afecciones respiratorias pediátricas.
Principales métodos:
- Una revisión sistemática de 23 estudios de diagnóstico (13.833 niños) identificados a través de búsquedas en MEDLINE y Embase.
- Se calcularon las proporciones de probabilidad, sensibilidad y especificidad para los síntomas y hallazgos, con el infiltrado de radiografía torácica como estándar de referencia.
Principales resultados:
- Ningún síntoma indica con seguridad una neumonía. El dolor en el pecho mostró una asociación moderada en los adolescentes.
- La fiebre y la taquipnea tenían un valor diagnóstico limitado. Los indicadores más significativos fueron la hipoxemia moderada (saturación de oxígeno ≤96%) y el aumento del trabajo respiratorio.
- La oxigenación normal (saturación de oxígeno > 96%) redujo la probabilidad de neumonía.
Conclusiones:
- La hipoxia y el aumento del trabajo respiratorio son indicadores más críticos de neumonía pediátrica que los hallazgos de taquipnea o auscultativos.
- La evaluación clínica debe dar prioridad a los signos de hipoxemia y dificultad respiratoria para el diagnóstico preciso de la neumonía en niños.
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