PPHN
Clinical teaching and practical ideas for your next study session.
Neonatal Oxygenation Index: Why PaO₂ Needs Ventilator Context
The same PaO₂ can reflect very different degrees of respiratory failure depending on FiO₂ and mean airway pressure. Learn how oxygenation index puts arterial oxygenation in support context—and why it cannot identify the cause.
A Failed Neonatal Hyperoxia Test Does Not Diagnose CHD
A low PaO₂ after 100% oxygen can reflect cyanotic heart disease, PPHN, or severe lung disease. Learn why the hyperoxia test cannot settle the diagnosis—and what should happen next.
Severe PPHN Echo Findings: A Board-Ready Reading Method
Learn to connect shunt direction, septal bowing, tricuspid regurgitation, and ventricular function when interpreting severe PPHN echocardiography questions.
Severe PPHN on Echocardiography: Read the Pressure Pattern
Severe persistent pulmonary hypertension of the newborn is best recognized as a linked pressure-and-flow pattern, not a single echocardiographic measurement. Learn how RV pressure, septal geometry, shunt direction, and ventricular function fit together.