The Effect of Breast Milk Odor on Feeding Cues, Transition Time to Oral Feeding, and Abdominal Perfusion in Premature Newborns: A Randomised Controlled Trial

Purpose: The present study was conducted to determine the effect of odor stimulation with breast milk (BM) applied to premature newborns before and during enteral feeding on feeding cues, transition time to oral feeding and abdominal perfusion. Design: This study was a parallel group pretest-post test randomised controlled trial (RCT). Methods: The study was conducted in the neonatal intensive care unit (NICU) in Türkiye. Study data were collected from 32 premature newborns between October 2020 and December 2021. Newborns were randomly assigned to either intervention (n = 16) or control (n = 16) groups. Odor stimulation with BM was applied to newborns in the intervention group (IG) before and during enteral feeding for 3 days. Data were collected with the Newborn Information Form, Abdominal Perfusion Follow-up Form, and Feeding Cues Follow-up Form. Yates corrected and Fisher chi-squared test, Mann-Whitney U test, Cohen Kappa statistics, Permanova analysis, and Wilcoxon test were used in the analysis. The study was registered in ClinicalTrials.gov (NCT04843293). Results: The frequency of feeding cues in newborns who were exposed to the odor of BM, was higher than in the control group (CG) (p <.05). The transition times to oral feeding were similar in newborns in the IG and CG (p >.05). Abdominal perfusion level of newborns in the IG was higher than the CG (p <.05), and the level of abdominal perfusion showed a significant difference in terms of group*time interaction (p <.05). Conclusion: Our findings suggest that odor stimulation with BM will be beneficial in improving the digestive functions of premature newborns.