![Figure 1. Effects of surfactant on alveolar-arterial oxygen tension difference (A-aDO(2))(mean) in study 1 and study 2. Some SD bars are omitted for simplicity. Group S = intratracheal acidified saline; IF = intratracheal infant formula; BM = intratracheal breast milk; IF-PSF100, BM-PSF100 = intratracheal infant formula or breast milk followed by intratracheal surfactant 100 mg/kg; IF-PSF200, BM-PSF200 = intratracheal infant formula or breast milk followed by intratracheal surfactant 200 mg/kg. [Section] P < 0.05 versus basal values within groups;#P < 0.05 versus group S;*P < 0.05 versus group IF or BM;#P < 0.05 for group PSF200 versus group PSF100.](https://asa2.silverchair-cdn.com/asa2/content_public/journal/anesthesiology/91/1/10.1097_00000542-199907000-00033/2/33ff1.png?Expires=1716927531&Signature=XsQgk0Meygw05v~mUmsgr1LKQjTD~a0Co4hKlLZ70Xq7ZNR7uQj8qBvtT4draiBzEzP3eaMEOF9pUqZAlbf0khaf~c4zyQU0OlpGy1D8nLUtTeGPw7w8jb~wLMIFlljRSTw4jDTdRCgkuwMCMnJ8i6rDvjutTmVXjpGnkWKbyiutYIW7rTD8icnVPg0I5~wXktlheRYSCEF9MdL-ztEaFI97rAJgiIjggkfFb~tuBvXGx2tR8ObfSETdA6T~exxivDr~ev6hOsNCyumb6nc8rA~IUHeiuUmKaWyyLGS0jQptDv02TFdH-2IAFMOGu4JzIpreJZWA5OgFJ8aAe5wTcg__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Figure 1. Effects of surfactant on alveolar-arterial oxygen tension difference (A-aDO(2))(mean) in study 1 and study 2. Some SD bars are omitted for simplicity. Group S = intratracheal acidified saline; IF = intratracheal infant formula; BM = intratracheal breast milk; IF-PSF100, BM-PSF100 = intratracheal infant formula or breast milk followed by intratracheal surfactant 100 mg/kg; IF-PSF200, BM-PSF200 = intratracheal infant formula or breast milk followed by intratracheal surfactant 200 mg/kg. [Section] P < 0.05 versus basal values within groups;#P < 0.05 versus group S;*P < 0.05 versus group IF or BM;#P < 0.05 for group PSF200 versus group PSF100.
