Related Experiment Videos
High frequency oscillation for preterm infants with severe respiratory failure
V Chan1, A Greenough, H R Gamsu
1Department of Child Health, King's College Hospital, London.
Insights
High-frequency oscillation (HFO) is a rescue treatment for preterm infants with severe respiratory failure. Pulmonary airleak diagnosis and lack of early improvement indicate a poor prognosis for HFO therapy.
Area of Science:
- Neonatal Medicine
- Pediatric Critical Care
- Respiratory Physiology
Background:
- Severe respiratory failure in preterm infants often necessitates advanced ventilatory support.
- High-frequency oscillation (HFO) is utilized as a rescue therapy when conventional methods fail.
- Identifying prognostic factors for HFO is crucial for optimizing patient outcomes.
Purpose of the Study:
- To assess the efficacy of HFO as a rescue treatment for preterm infants with severe respiratory failure.
- To identify clinical factors that predict outcomes in infants receiving HFO.
Main Methods:
- A cohort of 36 preterm infants (median gestational age 27 weeks) with severe respiratory failure were studied.
- Infants received HFO when requiring high inspired oxygen concentration (>85%) and/or high mean airway pressure (>12 cm H2O).
- Alveolar-arterial oxygen gradient (A-aDO2) was measured before and during HFO therapy.
Main Results:
- Seventeen out of 36 infants died. Respiratory distress syndrome and persistent fetal circulation were associated with better outcomes than pulmonary airleak.
- Infants who survived had a significantly higher A-aDO2 at 2 and 6 hours on HFO compared to those who died.
- A diagnosis of pulmonary airleak was linked to a poorer prognosis.
Conclusions:
- Pulmonary airleak is a significant negative prognostic factor for HFO as rescue treatment.
- Failure to demonstrate early improvement in respiratory status (e.g., A-aDO2) on HFO indicates a poor prognosis.
- HFO can be a life-saving intervention, but careful patient selection and monitoring are essential.
Abstract:
High frequency oscillation (HFO) as rescue treatment for preterm infants with severe respiratory failure has been assessed and prognostic factors identified. Thirty six infants with a median gestational age of 27 weeks were studied. Immediately before transfer to HFO, the infants were receiving an inspired oxygen concentration of > or = 85% and/or a mean airway pressure of > or = 12 cm H2O and had a median alveolar-arterial oxygen gradient (A-aDO2) of 73.28 kPa (range 49.34-89.91). Seventeen infants subsequently died. Comparison of those 17 with the remaining 19 infants demonstrated that respiratory distress syndrome and persistent fetal circulation were associated with a significantly better outcome than pulmonary airleak. The A-aDO2 after two and six hours on HFO was significantly higher in those infants who survived compared with those who died. We conclude that a diagnosis of pulmonary airleak and failure to show early improvement in respiratory status indicate a poor prognosis when HFO is used as rescue treatment.