Match the following clinical presentations of neonatal respiratory distress with their primary underlying pathophysiologic mechanism.
- A 39-week gestation infant born via scheduled cesarean delivery without prior labor. Presents with tachypnea and prominent perihilar streaking on chest radiograph.Delayed clearance of alveolar fluid
- A 28-week gestation infant presenting with severe retractions and cyanosis. Chest radiograph demonstrates diffuse reticulogranular infiltrates with air bronchograms.Insufficient production of pulmonary surfactant
- A 41-week gestation infant born through thick meconium. Exam shows a barrel-shaped chest and radiograph reveals patchy bilateral infiltrates with lung hyperinflation.Mechanical airway obstruction and chemical pneumonitis
- A 38-week gestation infant with severe respiratory distress immediately after birth. Examination reveals a scaphoid abdomen and absent breath sounds over the left hemithorax.Incomplete fusion of the pleuroperitoneal folds
Cevap
The clinical vignettes correctly match as follows: scheduled cesarean presentation is caused by delayed alveolar fluid clearance; prematurity with ground-glass radiograph is caused by insufficient surfactant; post-term presentation with meconium is caused by airway obstruction and chemical pneumonitis; and the presentation with a scaphoid abdomen is caused by incomplete fusion of the pleuroperitoneal folds.
Each clinical presentation is a classic archetype of neonatal respiratory distress that directly corresponds to a specific physiological or structural deficit. Transient tachypnea of the newborn is a fluid clearance issue, respiratory distress syndrome is a surfactant deficiency issue, meconium aspiration syndrome is an obstructive and inflammatory issue, and congenital diaphragmatic hernia is a structural embryologic issue.
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Anahtar Kavram
Pathophysiology of neonatal respiratory distress syndromes
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