Influence of the selective insufflation technique on cerebral blood flow in preterm infants

Abstract Introduction The intervention of respiratory physio-therapy in neonatal units is in continuous development, having its own care characteristics related to the weight and gestational age of the newborn, respecting the immaturity of the organs and systems and the diseases of this patient. Through techniques, the objective is to optimize the respiratory function, assisting in the clearance of secretions, and the restoration of lung volumes. Objective To verify if the respiratory physiotherapy technique of selective insufflation alters the cerebral blood flow in premature infants under 34 weeks of gestational age. Methods This is an uncontrolled clinical trial, conducted in a Neonatal Intensive Care Unit of a level III hospital, between January 2019 and March 2020, with participation of premature newborns under 34 weeks of gestational age. All were submitted to transfontanellar Doppler ultrasonography to assess cerebral blood flow measurements, mainly the resistance index, before and after the application of the selective insufflation respiratory physiotherapy technique. Results Sixty-two newborns were included, with a mean gestational age of 29.3 ± 2.2 weeks and birth weight of 1,259 ± 388 grams. The resistance index did not change significantly (RI before: 0.55 ± 0.07; after: 0.54 ± 0.07; p = 0.06) before and after the intervention and no studied variables such as, gender, gestational age, weight, Apgar score or SNAPPE II score had an influence on cerebral blood flow measurements. Conclusion The selective insufflation technique did not alter cerebral blood flow in premature newborn infants under 34 weeks gestational age.