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DOI: 10.1055/s-0040-1721392
Nebulization of High-Dose Poractant Alfa in Newborn Piglets on Nasal Continuous Positive Airway Pressure Yields Therapeutic Lung Doses of Phospholipids
Funding This study received funds from Chiesi Farmaceutici S.p.A. (Parma, Italy), who also supplied the poractant alfa. The customized investigational eFlow Neos Nebulizers were provided by PARI Pharma GmbH (Munich, Germany). F.B., F.S., and F.R. are Chiesi Farmaceutici S.p.A. employees. M.S. is employed by PARI Pharma GmbH, Germany.
Abstract
Objective It is not known how much surfactant must be nebulized to reach a lung dose of phospholipids equivalent to that obtained by the instillation of 200 mg/kg of surfactant. We aimed to assess the feasibility of nebulizing a high-dose of poractant alfa with the eFlow-Neos investigational vibrating-membrane nebulizer in newborn piglets on nasal continuous positive airway pressure (nCPAP) and to determine whether this intervention would yield therapeutic lung doses of phospholipids.
Study Design Twelve 1-day-old piglets on nCPAP received 600 mg/kg of poractant alfa admixed with technetium-99m via nebulization. Six piglets receiving 200 mg/kg of instilled synthetic surfactant served as controls. Lung deposition (percentage of the nominal dose) was determined by gamma scintigraphy, and the phospholipids' lung dose was calculated.
Results The lung dose of phospholipids (mean ± standard deviation [SD]) was 138 ± 96 mg/kg with nebulization, and 172 ± 24 mg/kg with instillation (p = 0.42). Nebulization took 58 ± 12 minutes. The arterial partial pressure of carbon dioxide increased from 6.7 ± 1.1 to 7.2 ± 1.1 kPa during nebulization (p = 0.04). Cerebral oximetry remained stable, and there was no hemodynamic instability.
Conclusion Nebulization was well tolerated, and the mean lung dose of phospholipids was above 100 mg/kg, that is, not different from the instillation group. These experimental findings suggest that it may be feasible to reach therapeutic lung doses of phospholipids by surfactant nebulization during nCPAP.
Key Points
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It is not known if effective lung doses of surfactant can be delivered by nebulization.
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Nebulization of high-dose surfactant in newborn piglets on nCPAP was well tolerated.
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A high-dose of nebulized poractant alfa yielded therapeutic lung doses of phospholipids.
Keywords
deposition - aerosolization - noninvasive ventilation - neonatal respiratory distress syndrome - surfactantNote
The study design, execution, and data analysis were completed without interference from the sponsors. These results have not been presented in any meeting or other type of media. The use of nebulized high-dose poractant alfa is considered off-label.
Publication History
Received: 31 May 2020
Accepted: 20 October 2020
Article published online:
26 November 2020
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