Mothers’ voices and white noise on premature infants’ physiological reactions in a neonatal intensive care unit: A multi-arm randomized controlled trial

Liao, Jinhua; Li, Guihua; Xie, Na-Mei; Wang, Shuo; Wu, Taohong; Lin, Ying Q.; Hu, Rongfang; He, Hong

doi:10.1016/j.ijnurstu.2021.103934

Cited by 15 publications

(33 citation statements)

References 48 publications

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“…Therefore, if a caregiver wants to read or sing to the child, the side port of the incubator should be opened. Additionally, the lower frequencies will be better audible than higher, which might explain why in a recent analysis the exposure to mothers' voices led inside an incubator induced less relaxing physiological reactions in the newborns compared to white noise exposure [36].…”

Section: Acoustic Properties Of the Incubatormentioning

confidence: 99%

Newborn Incubators Do Not Protect from High Noise Levels in the Neonatal Intensive Care Unit and Are Relevant Noise Sources by Themselves

et al. 2021

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Background: While meaningful sound exposure has been shown to be important for newborn development, an excess of noise can delay the proper development of the auditory cortex. Aim: The aim of this study was to assess the acoustic environment of a preterm baby in an incubator on a newborn intensive care unit (NICU). Methods: An empty but running incubator (Giraffe Omnibed, GE Healthcare) was used to evaluate the incubator frequency response with 60 measurements. In addition, a full day and night period outside and inside the incubator at the NICU of the University Hospital Zurich was acoustically analyzed. Results: The fan construction inside the incubator generates noise in the frequency range of 1.3–1.5 kHz with a weighted sound pressure level (SPL) of 40.5 dB(A). The construction of the incubator narrows the transmitted frequency spectrum of sound entering the incubator to lower frequencies, but it does not attenuate transient noises such as alarms or opening and closing of cabinet doors substantially. Alarms, as generated by the monitors, the incubator, and additional devices, still pass to the newborn. Conclusions: The incubator does protect only insufficiently from noise coming from the NICUThe transmitted frequency spectrum is changed, limiting the impact of NICU noise on the neonate, but also limiting the neonate’s perception of voices. The incubator, in particular its fan, as well as alarms from patient monitors are major sources of noise. Further optimizations with regard to the sound exposure in the NICU, as well as studies on the role of the incubator as a source and modulator, are needed to meet the preterm infants’ multi-sensory needs.

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Section: Acoustic Properties Of the Incubatormentioning

confidence: 99%

Newborn Incubators Do Not Protect from High Noise Levels in the Neonatal Intensive Care Unit and Are Relevant Noise Sources by Themselves

et al. 2021

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“…While still in the womb, the infant is influenced by the mother’s heartbeat, and exposure to these familiar sounds and rhythms after birth has a soothing effect on the infant [ 10 ]. Studies support the positive effects of white noise intervention for neonates with improvement in sleep and weight gain [ 9 , 11 ]. Recently, several studies have evaluated the analgesic effect of white noise in neonates with procedural pain, but the results are inconsistent [ 8 , 10 , [12] , [13] , [14] ].…”

Section: Introductionmentioning

confidence: 99%

Effects of white noise on procedural pain-related cortical response and pain score in neonates: A randomized controlled trial

Ren

Lin

et al. 2022

International Journal of Nursing Sciences

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“…Therefore, exploring non-drug interventions for premature infants in NICU is worthwhile. A good environment that simulates the uterus, such as the appropriate temperature and humidity in the incubator, swaddling the baby, and a light/dark cycle (8), can help premature infants transition from the mother's internal environment to the external environment (9). A study has shown that early auditory stimulation intervention for NICU preterm infants can regulate their digestive, nervous, and circulatory systems, stabilize their physiological state, and promote growth and development (10).…”

Section: Introductionmentioning

confidence: 99%

“…The sound of the mother's heartbeat has been shown to stabilize the heart rate and respiration of premature infants, reduce pain, and promote weight gain (11). White noise has also been shown to alleviate pain, reduce the heart rate, and maintain high oxygen saturation in premature infants (9,12). The auditory stimulation involves recording the sound of the mother's heartbeat combined with white noise.…”

Section: Introductionmentioning

confidence: 99%

“…The auditory stimulation involves recording the sound of the mother's heartbeat combined with white noise. It is then played in the incubator to simulate the sound of the environment in the womb (9). Recent research at home and abroad has mainly focused on the sound of the mother's heartbeat or white noise on the experience of pain and weight of preterm infants.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the sound of the mother’s heartbeat combined with white noise on heart rate, weight, and sleep in premature infants: a retrospective comparative cohort study

Zhang¹,

He²

2023

Ann Palliat Med

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Background: The neonate intensive care unit (NICU) is a high-stress environment can affect the hormone secretion, cardiopulmonary function, sleep/wake cycle, alertness, temperature regulation, and intellectual development of premature infants. It is not conducive to their recovery, growth, and development. The sound of the mother's heartbeat and white noise can stabilize the heart rate and respiration of premature infants and alleviate pain. This study aims to analyze the effects of the sound of the mother's heartbeat combined with white noise on the heart rate, weight, and sleep status of premature infants in the NICU.Methods: We retrospectively analyzed 121 premature infants admitted to the Newborn Department of Suzhou Kowloon Hospital from January 2019 to December 2021. The infants were divided into an intervention group (those given the mother's heartbeat sound combined with white noise) and a control group (routine treatment and nursing); The heart rate, sleep state, weight and weight gain rate of the two groups were compared before and after the intervention. Results:The heart rate and behavioral status scores of the intervention group during the intervention (10, 20 min) and 1 min after the intervention were significantly lower than 1 min before the intervention (P<0.05). The intervention group's weight was significantly higher than the control group's on the 14th day after intervention (P<0.05), and the rate of weight gain was faster than that of the control group (P<0.05).The average daily milk intake of the intervention group in the first and second weeks was higher than that in the control group (P<0.05). Multiple stepwise regression analysis showed that the rate of weight gain in the intervention group was higher than that in the control group (P<0.05). Conclusions:The combination of the auditory stimulation of the mother's heartbeat and white noise for premature infants in NICU can effectively reduce the heart rate of premature infants, stabilize their mood, promote their sleep, increase the amount of milk consumption during hospitalization, increase the rate of weight gain, and promote their physical development.

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Mothers’ voices and white noise on premature infants’ physiological reactions in a neonatal intensive care unit: A multi-arm randomized controlled trial

Cited by 15 publications

References 48 publications

Newborn Incubators Do Not Protect from High Noise Levels in the Neonatal Intensive Care Unit and Are Relevant Noise Sources by Themselves

Newborn Incubators Do Not Protect from High Noise Levels in the Neonatal Intensive Care Unit and Are Relevant Noise Sources by Themselves

Effects of white noise on procedural pain-related cortical response and pain score in neonates: A randomized controlled trial

Effect of the sound of the mother’s heartbeat combined with white noise on heart rate, weight, and sleep in premature infants: a retrospective comparative cohort study

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