Abstract:Objective To compare the effects of nasal simultaneous intermittent mandatory ventilation (nSIMV) and nasal intermittent positive pressure ventilation (NIPPV) combined with caffeine on premature infants with severe acute respiratory distress syndrome (ARDS) after weaning. Methods The clinical data of 87 cases of severe ARDS of premature infants admitted to our hospital from March 2018 to March 2019 were treated with mechanical ventilation. Among them, 41 cases were treated with nSIMV combined with caffeine as group A after weaning, and the rest 46 cases were treated with NIPPV combined with caffeine as group B. The success rates of weaning and rescue, re‐spiratory support time, total hospitalization time, blood gas analysis index changes, and complication rates were compared. Results Six cases died in group A (2 died within 72 hours after the first weaning, 4 died 72 hours after the first weaning), and 1 case died in group B (within 72 hours after the first weaning). The success rates of weaning and rescue in group B were higher than those in group A (P < 0.05). Respiratory support time and total hospitalization time in group B were shorter than those in group A (P < 0.05). The values of pH and PaO2 in group B were higher than those in group A after 72 hours (P < 0.05), and the values of carbon dioxide (PaCO2) and concentration of inhaled oxygen (FiO2) after 72 hours were lower than those in group A (P < 0.05). In group A, The pH after 48 hours and PaO2 after 48 and 72 hours were higher than those at the first time of weaning, which after 72 hours were higher than those after 24 hours, and the PaCO2 after 48 and 72 hours were lower than those at the first time of weaning and after 24 hours, and the FiO2 after 72 hours was lower than those at the first time of weaning and after 24 and 48 hours (P < 0.05). In group B, the pH and PaO2 after 48 and 72 hours were higher than those at the first time of weaning, and those after 72 hours were higher than those after 48 hours, and the PaCO2 levels after 48 and 72 hours were lower than those at the first time of weaning and after 24 hours, and the PaCO2 level after 72 hours was lower than that after 48 hours, and the FiO2 level after 72 hours was lower than those at the first time of weaning and after 24 and 48 hours (P < 0.05). The incidence of total complications in group B was lower than that in group A (P < 0.05). Conclusion NIPPV combined with caffeine is recommended for premature infants with severe ARDS after weaning. Compared with nSIMV combined with caffeine, NIPPV combined with caffeine can improve weaning success rate and cure success rate, accelerate recovery, and improve blood gas analysis indexes, which can help control the risk of complications.