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Updated: Aug 14, 2026

A Swine Model of Neonatal Asphyxia
Published on: October 11, 2011
Management of infants with severe respiratory failure and persistence of the fetal circulation, without
Insights
This study presents a successful management strategy for infants with persistent pulmonary hypertension of the newborn (PPHN) and severe respiratory failure, minimizing ventilator-induced lung injury. All infants survived, highlighting the effectiveness of this low-pressure ventilation approach.
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Critical Care
Background:
- Persistent pulmonary hypertension of the newborn (PPHN) is a critical condition causing severe respiratory failure in infants.
- Minimizing barotrauma during mechanical ventilation is crucial for managing these vulnerable patients.
Purpose of the Study:
- To describe a successful treatment regimen for infants with PPHN and severe respiratory failure.
- To evaluate the efficacy of a ventilation strategy focused on minimizing barotrauma.
Main Methods:
- Nasotracheal intubation and intermittent mandatory ventilation (IMV) were employed.
- Peak inspiratory pressures were guided by chest excursion; permissive hypercapnia was utilized (PaCO2 up to 60 mm Hg).
- Tolazoline and dopamine were administered as adjunctive therapies.
Main Results:
- All 15 infants survived the acute phase.
- Ten infants showed improved oxygenation with tolazoline.
- Only one infant developed chronic lung disease.
Conclusions:
- A management strategy focused on minimizing barotrauma, utilizing permissive hypercapnia, and appropriate pharmacotherapy can lead to successful outcomes in PPHN.
- This approach demonstrates the potential for high survival rates and reduced chronic lung disease in neonates with severe respiratory failure.
Abstract:
The successful management of 15 infants suffering from persistence of fetal pulmonary circulation and in severe respiratory failure is presented. The treatment regimen focused on minimizing barotrauma. Infants were intubated nasotracheally and ventilated with intermittent mandatory ventilation. Peak inspiratory pressures were determined by the clinical assessment of chest excursion. Ventilator settings and fractional inspiratory oxygen (FiO2) were selected to maintain a PaO2 between 50 and 70 mm Hg; PaCO2 was not a controlling parameter and was allowed to increase as high as 60 mm Hg. Hyperventilation and muscle relaxants were not used. High ventilator rate was used in ten infants who required high inspiratory pressure to maintain chest excursion, with a favorable response in five. Tolazoline was given to 14 infants of whom ten showed an improvement in oxygenation; dopamine was given to three infants who were oliguric. All infants survived, and only one infant developed chronic lung disease which was defined by the infant's need for supplemental oxygen beyond 30 days of life.
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