BACKGROUND: It would be advantageous for the treatment of neonatal respiratory distress syndrome if effective amounts of surfactant could be delivered by nebulization. OBJECTIVE: To investigate lung deposition and distribution of nebulized porcine surfactant using an investigational eFlow neonatal nebulizer. METHODS: While lying on one side, 1-day-old piglets inhaled 200 mg·kg(-1) of nebulized surfactant via mask, nasal prongs, or tracheal tube. The surfactant was diluted with normal saline to 40 mg·ml(-1) and labeled with (99m)technetium-labelled nanocolloid. Undiluted surfactant (80 mg·ml(-1)) was instilled tracheally in a fourth group. Each group had 8 animals. Lung deposition was measured by gamma scintigraphy, and deposition values were presented as a percentage of the nebulized or instilled dose. RESULTS: The median lung deposition of inhaled surfactant was 5% (range 3-16) via mask, 14% (2-40) via prongs, and 45% (25-56) via tracheal tube (p < 0.05). It was 88% (71-96) with instillation. In all groups, the surfactant preferentially went to the dependent lung. Deposition ratios (upper lung/both lungs) were 0.32 (0.13-0.58), 0.15 (0.05-0.58), 0.16 (0.11-0.23), and 0.08 (0.03-0.46). CONCLUSIONS: Using this nebulizer, the lung depositions of porcine surfactant were 45% via endotracheal tube and 14% via nasal-continuous positive airway pressure (prongs). These figures might be physiologically relevant, but still have to be confirmed in efficacy studies.
BACKGROUND: It would be advantageous for the treatment of neonatal respiratory distress syndrome if effective amounts of surfactant could be delivered by nebulization. OBJECTIVE: To investigate lung deposition and distribution of nebulized porcine surfactant using an investigational eFlow neonatal nebulizer. METHODS: While lying on one side, 1-day-old piglets inhaled 200 mg·kg(-1) of nebulized surfactant via mask, nasal prongs, or tracheal tube. The surfactant was diluted with normal saline to 40 mg·ml(-1) and labeled with (99m)technetium-labelled nanocolloid. Undiluted surfactant (80 mg·ml(-1)) was instilled tracheally in a fourth group. Each group had 8 animals. Lung deposition was measured by gamma scintigraphy, and deposition values were presented as a percentage of the nebulized or instilled dose. RESULTS: The median lung deposition of inhaled surfactant was 5% (range 3-16) via mask, 14% (2-40) via prongs, and 45% (25-56) via tracheal tube (p < 0.05). It was 88% (71-96) with instillation. In all groups, the surfactant preferentially went to the dependent lung. Deposition ratios (upper lung/both lungs) were 0.32 (0.13-0.58), 0.15 (0.05-0.58), 0.16 (0.11-0.23), and 0.08 (0.03-0.46). CONCLUSIONS: Using this nebulizer, the lung depositions of porcine surfactant were 45% via endotracheal tube and 14% via nasal-continuous positive airway pressure (prongs). These figures might be physiologically relevant, but still have to be confirmed in efficacy studies.
Authors: Karl Bass; Mohammad A M Momin; Connor Howe; Ghali Aladwani; Sarah Strickler; Arun V Kolanjiyil; Michael Hindle; Robert M DiBlasi; Worth Longest Journal: AAPS PharmSciTech Date: 2022-04-19 Impact factor: 3.246
Authors: Connor Howe; Mohammad A M Momin; Dale R Farkas; Serena Bonasera; Michael Hindle; P Worth Longest Journal: Pharm Res Date: 2021-08-30 Impact factor: 4.580
Authors: Carmen Rey-Santano; Victoria E Mielgo; Miguel Angel Gomez-Solaetxe; Federico Bianco; Fabrizio Salomone; Begoña Loureiro Journal: Crit Care Med Date: 2020-06 Impact factor: 7.598
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Authors: Riccardo Zecchi; Pietro Franceschi; Laura Tigli; Barbara Pioselli; Valentina Mileo; Xabier Murgia; Fabrizio Salomone; Giuseppe Pieraccini; Haruo Usada; Augusto F Schmidt; Noah H Hillman; Matthew W Kemp; Alan H Jobe Journal: Pharmaceutics Date: 2021-06-12 Impact factor: 6.321