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Updated: Aug 14, 2026

Protocol and Guidelines for Point-of-Care Lung Ultrasound in Diagnosing Neonatal Pulmonary Diseases Based on International Expert Consensus
Published on: March 6, 2019
Insights
Sudden infant deaths over three months old may involve non-suppurative tracheobronchitis, particularly in colder months. This suggests a distinct cause for these specific infant deaths requiring separate investigation.
Area of Science:
- Pediatric Pathology
- Infant Mortality Studies
- Respiratory System Research
Background:
- Sudden unexpected infant death (SUID) often presents with non-suppurative tracheobronchitis at autopsy.
- The etiological significance of this tracheobronchitis in SUID remains unclear.
- Existing research often groups SUID cases without differentiating based on post-mortem findings.
Purpose of the Study:
- To investigate the potential role of non-suppurative tracheobronchitis in a specific subset of sudden infant deaths.
- To determine if infants with tracheobronchitis represent a distinct group within SUID.
- To inform differential diagnostic and investigative approaches for SUID.
Main Methods:
- Analysis of a series of sudden infant death cases.
- Correlation of post-mortem findings (presence/absence of tracheobronchitis) with infant age at death.
- Examination of seasonal patterns in SUID with and without tracheobronchitis.
Main Results:
- Infants who died suddenly and unexpectedly with non-suppurative tracheobronchitis were older, typically over three months of age.
- These deaths occurred more frequently during the colder months of the year.
- A potential association between tracheobronchitis and older infants experiencing SUID was observed.
Conclusions:
- Non-suppurative tracheobronchitis may indicate a distinct pathological entity in certain sudden infant deaths.
- Infants over three months with this finding warrant separate consideration in mortality investigations.
- Investigative strategies for SUID should differentiate cases based on the presence of tracheobronchitis.
Abstract:
In many infants who have died suddenly and unexpectedly post mortem examination reveals the presence of a non-suppurative tracheobronchitis. The role of the tracheobronchitis in the sudden death of the infant is not known. Analysis of a series of sudden infant deaths indicates that these infants die at an older age, i.e. over three months, and most frequently in colder months of the year. If, as suggested, these deaths constitute a distinct group, investigations regarding the mode of death should be undertaken separately from that in younger infants in whom no such lesions are found.
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