Effects of Kangaroo Care in Heart Rate Variability among Preterm Infants

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  • 早産児におけるカンガルーケアの心拍変動への影響

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Abstract

<p>Aim: To explore the effects of kangaroo care on heart rate variability among preterm infants in the neonatal intensive care unit.</p><p>Methods: We evaluated heart rate variability in preterm infants who received kangaroo care. This included heart rate (HR), low-frequency power (LF), high-frequency power (HF), and LF/HF ratio during the pre-kangaroo-care period (before 32-34 weeks of gestation), before kangaroo care, and while kangaroo care was being performed.</p><p>Results: HR during kangaroo care decreased 8 out of 14 times compared to that during the pre-kangaroo-care period and decreased 4 out of 11 times compared to that before kangaroo care was performed. LF/HF ratio during kangaroo care decreased 6 out of 14 times compared to that during the pre-kangaroo-care period and decreased 6 out of 11 times compared to that before kangaroo care was performed. The LF and HF power spectra only showed peaks in the LF power and lows in the HF power compared with the LF power. The mean HR value was 155.5±12.45 beats/min and the LF/HF ratio was 6.16±1.78.</p><p>Conclusions: There were no high or low trends in the HR and LF/HF ratio between before kangaroo care and while kangaroo care was being performed. The HF power was lower than the LF power, suggestive of immature control of breathing in preterm infants. The mean values of HR and the LF/HF ratio while kangaroo care was being performed suggested that the sympathetic/parasympathetic balance was similar to that in a sleeping state in preterm infants.</p>

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