To evaluate the effect of caffeine compared with theophylline treatment on the risk of apnea and use of mechanical ventilation in preterm infants with recurrent apnea. Subgroup analyses: 1  Outcomes of different doses of caffeine or theophylline. 2  Outcomes of infants born at different gestational ages or birth weights.here is some evidence that caffeine is as effective as theophylline in the short-term for reducing apnea in premature babies, is better tolerated and is easier to give. Apnea is a pause in breathing of greater than 20 seconds.
If the equator is projected outward to the celestial sphere, forming the celestial equator, it crosses the ecliptic at two points known as the equinoxes. The Sun, in its apparent motion along the ecliptic, crosses the celestial equator at these points, one from south to north, the other from north to south.
Polaris wasnât always the North Star. Around the year 2500 BC, the celestial pole was near Thuban, located in the constellation Draco. Around the year 400 BC, the pole was closer to Kochab, Beta Ursae Minoris, than it was to Alpha UMi.