2.1 Study design
All inpatient children under 18 years of age with a admission diagnosis
of ELP and a confirmed history of exogenous oily materials aspiration
were retrospectively reviewed from June 2012 to December 2021 from the
medical records at First Affiliated Hospital of Guangzhou Medical
University, a tertiary care, free-standing public hospital. Medical
records were retrospectively reviewed by using a standardized form to
collect demographic data, clinical manifestations, laboratory test
results and radiological findings. All patients with established ELP
were evaluated by the senior attending pediatrician at the inpatient
units on the basis of signs, symptoms, and laboratory/imaging findings
during hospital stay. The exclusion criterion was suspected with a
history of or no evidence of exogenous substances inhalation. A total of
17 children patients was included in the final analysis. CT scans of all
children found diffuse pulmonary lesion at admission. Supporative
measures, such as oxygen therapy, emprical antibiotic therapy, local or
systematic corticosteriods use to slow the inflammatory response, were
performed in children with clinical symptoms or severe lung damage. The
number of bronchoscopic lung lavage was carried out in terms of the
severity of clinical symptoms/signs and radiological findings.