Table 1. Nebulizer residue and delivery at the tip of the nasopharyngeal prongs of surfactant aerosol.

The delivery of the experimental surfactant preparations and synthetic lipids at the tip of the nasopharyngeal prongs was calculated as the percentage of the surfactant dose placed in the holding chamber of the nebulizer that was recovered at the distal end of the nasopharyngeal prongs. Data are expressed as mean ± SD % of n = 4.

Surfactant	Nebulizer residue	Delivery at the tip of the nasopharyngeal prongs
Synthetic lipids alone	10.5 ± 3.8 %	50.5 ± 15.9 %
SMB surfactant	4.7 ± 2.1 %	55.2 ± 14.2 %
BC surfactant	24.4 ± 5.3 %	39.6 ± 3.2 %
Infasurf	36.2 ± 7.0 %	32.6 ± 6.3 %