Open AccessTechnical Innovation for Visual Assessment of Preterm Newborns in a Neonatal Intensive Care Unit: Exploratory Study
Author(s) -
Cristiane Aparecida Moran,
Vera Lúcia dos Santos Alves,
Silvana Alves Pereira,
Marcelo F. da Costa
Publication year - 2021
Publication title -
rehabilitation research and practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.239
H-Index - 9
eISSN - 2090-2875
pISSN - 2090-2867
DOI - 10.1155/2021/9837505
Subject(s) - neonatal intensive care unit , medicine , heart rate variability , sample entropy , heart rate , intensive care , linear regression , intensive care unit , poincaré plot , autocorrelation , statistics , pediatrics , intensive care medicine , time series , mathematics , blood pressure
Objective The present study is aimed at assessing heart rate variability (HRV) and its correlation with visual acuity (VA) assessment of preterm newborns (PTNB) in neonatal intensive care units.Method Cross-sectional study analyzing HRV during assessment of VA with the aid of a Polar RS800CX heart rate monitor (Polar Electro Oy, Finland). HRV was analyzed according to time and frequency domains and the chaos domain used the autocorrelation coefficient and entropy. The sample consisted of hospitalized PTNB, and static analysis included simple regression diagnosis.Results A total of 14 PTNB were included in the sample. VA varied between 0.23 and 1.60 cpd, and only five PTNB obtained below-expected values for age. Statistical analysis demonstrated a negative correlation between VA and time domain (SDDN and SD2) and a positive correlation between frequency domain (heart rate and hertz), but in simple linear regression analysis, these variables did not influence VA.Conclusion The results of the study demonstrate that visual acuity was inversely correlated with SDNN and SD2 and during stimulation, showing that the higher the visual performance, the lower the autonomic modulation response.