Which of the following will favour the diagnosis of RDS in new bom -
Ans. is 'b' i.e., Air bronchogram in chest X- Ray Age of onset of infant Respiratory distress syndromeInfant respiratory distress syndrome presents immediately or soon after birth.Incidence and severity of RDS is inversely related to gestational ageApproximately 50% of the neonates born at 26 - 28 weeks gestation develops respiratory distress syndrome where as less than 30% of premature neonates born at 30-31 weeks gestation develop respiratory distress syndrome.Administration of antenatal corticosteroid reduces the incidence of respiratory distress syndrome Administration of single dose of corticosteroid reduces the incidence and severity of respiratory distress syndrome if delivery occurs within one week of administration of corticosteroid.Administration of corticosteroid cause 50% reduction in the incidence of respiratory distress syndrome.Air bronchogram is a characteristic X- Ray feature of Hyaline membrane diseaseX-Ray features of Hyaline membrane diseasePronounced hypo aerationB/L diffuse reticulo granular opacities in the pulmonary parenchyma."Prominent air bronchograms" (aerated bronchioles super- imposed on a background of collapsed alveoli)Air bronchogramAir bronchogram refers to the visualization of air filled bronchus when the surrounding alveoli are opacified.Normally, the lung fields are radiolucent and the bronchi are not separately visualized.But in certain conditions there is opacification of the alveoli due to various reasons.Due to this reason, the bronchus stands out as "radiolucent" in contrast to the adjacent alveoli, that are" radiopaque"These changes can be due to pneumonic consolidation, collapse of a part of the lung, or inflammatory edema in the lung tissue.Conditions associated with Air bronchogramARDSHyaline membrane diseaseAlveolar cell carcinomaPulmonary consolidation -. Pulmonary edemaAlveolar proteinosisSarcoidosisLymphoma
Receipt of antenatal steroids
Air bronchogram in chest X-ray
Manifests after 6 hrs
Occurs after term gestation
Respiratory Tract Disorders