The effect of individualised developmental care practices on the growth and hospitalisation duration of premature infants: the effect of mother's scent and flexion position

The Effect of Breast Milk Odor on the Pain and Stress Levels of the Newborn During the Endotracheal Suction Procedure

Objective: The study aimed to determine the effect of the breast milk odor on the pain and stress levels of the newborn during the endotracheal suction procedure. Method: The study was conducted in the randomized-controlled experimental design at the neonatal intensive care unit of the hospital in eastern Turkey between March 2022 and December 2023. The study population included newborns at the 37th to 41st gestational weeks who were receiving mechanical ventilation treatment in the neonatal intensive care unit of a hospital in eastern Turkey. All newborns who met the inclusion criteria during the data collection phase were included in the study. The study was completed with 88 newborns (44 in the intervention group and 44 in the control group). The Newborn Introductory Information Form, ALPS-Neo Newborn Pain and Stress Assessment Scale, and follow-up form were used to collect the study data. The breast milk odor of the mothers of the newborns was used as the intervention group in the study. The mothers of the newborns were contacted to obtain breast milk, and the information was obtained from the mother on the day of the procedure. One milliliter of breast milk was taken and dropped into a sterile sponge, and it was held 10 cm away from the baby's nose from 5 minutes before to 5 minutes after endotracheal suction. A routine endotracheal suction process was performed in the control group. Ethical principles were followed in the study. Results: We found that the intervention group's pain and stress score averages were lower than the control group during and after the endotracheal suction procedure (p < 0.05). Conclusion: We found that the breast milk odor reduced the pain, stress levels, and crying duration of newborns during the endotracheal suction process.

NICU sensory experiences associated with positive outcomes: an integrative review of evidence from 2015-2020

To inform changes to the Supporting and Enhancing NICU Sensory Experiences (SENSE) program, studies investigating sensory-based interventions in the NICU with preterm infants born ≤32 weeks were identified. Studies published between October 2015 to December 2020, and with outcomes related to infant development or parent well-being, were included in this integrative review. The systematic search used databases including MEDLINE, Cumulative Index to Nursing and Allied Health Literature, the Cochrane Library, and Google Scholar. Fifty-seven articles (15 tactile, 9 auditory, 5 visual, 1 gustatory/olfactory, 5 kinesthetic, and 22 multimodal) were identified. The majority of the sensory interventions that were identified within the articles were reported in a previous integrative review (1995-2015) and already included in the SENSE program. New evidence has led to refinements of the SENSE program, notably the addition of position changes across postmenstrual age (PMA) and visual tracking starting at 34 weeks PMA.

The Effect of Neonates' Exposure to Their Mother's Scent on Weight Gain: A Randomized Controlled Study

Objective: The aim of this study was to determine the effect of newborns' exposure to their mother's scent in the intensive care unit on their weight gain. Materials and Methods: This is an experimental randomized controlled study. One hundred and four neonates were included in the study. Two groups were observed in the research: the first group consisting of those exposed to their mother's scent (n = 52) and a second control group (n = 52). Data were collected with a data collection form and an infant body weight monitoring form. Significance for the study was accepted as p < 0.05. Results: Among the neonates, 61.5% were males, the gestational week of the infants was 38.49 ± 1.24, their mean weight was 3,213.32 ± 468.67 grams (g); the two groups were similar in terms of these characteristics (p > 0.05). The neonates exposed to their mother's scent at the beginning of the study were weighed, averaging 3,105.38 ± 487.69 g; at the end of Day 1 and Day 2, their mean weight was 3,150.77 ± 493.07 and 3,197.50 ± 489.06 g, respectively. It was seen that there were significant differences in the weight of the group of neonates exposed to their mother's scent before the experiment, on Day 1 and on Day 2 (p < 0.05). The neonates in the control group were weighed at the beginning of the experiment, exhibiting a mean of 3,119.42 ± 452.85 g. Their mean weight was 3,107.12 ± 463.30 g at the end of Day 1 and 3,116.63 ± 471.09 g at the end of Day 2. These differences, however, were not statistically significant (p > 0.05). Conclusion: We found that the newborns exposed to their mother's scent in the intensive care unit registered a higher increase in weight. Our recommendation is that a mother's scent be routinely factored into neonatal care in intensive care units.

Neonatal cortical perceptions of maternal breast odours: A fNIRS study

AIM

The aim was to determine whether preterm and full-term newborn infants could process maternal breast odour at a cortical level.

METHODS

Newborn infants were exposed to cloths containing their own mother's breast odour and freshly laundered control cloths for 10 seconds, while functional near-infrared spectroscopy measured cortical activation in their olfactory processing areas. We studied 45 newborn infants born at 28-41 weeks of gestation and divided them into three groups: full-term (37-41 weeks), late preterm (33-36 weeks) and very preterm (28-32 weeks). Cortical activation was defined as a regional increase of oxyhaemoglobin following maternal breast odour stimuli.

RESULTS

Full-term infants demonstrated bilateral activation of their olfactory cortices following exposure to maternal breast odour. Late preterm infants and very preterm boys exhibited unilateral cortical activation, unlike very preterm girls.

CONCLUSION

Infants born from 32 weeks, and possibly earlier, could process low concentration maternal odours at a cortical level, which suggests they were more aware of their environment. These findings could make a significant contribution to improving the sensory environment of preterm infants and improve bonding.

The Effect of Individualized Developmental Care Practices in Preterm Infants

Background: Preterm infants are vulnerable humans requiring much care and attention. They may be exposed to irregular noise, light, and odor in the neonatal intensive care unit for a period of several weeks or months. This study was carried out to determine the effect of individualized developmental care on physiological parameters, growth, and transition to oral feeding in preterm infants. Methods: The study was a randomized controlled trial. The sample comprised premature infants meeting the inclusion criteria. They were randomly assigned to four groups: the maternal voice group, the breast milk odor (BMO) group, the incubator cover (IC) group, and the control group. Results: No statistically significant difference was found between the groups in terms of weight, height, and head circumference at time of discharge. Mean SO2 values were statistically higher in the IC group than the other groups; however, the heart rate and respiratory rate were not statistically different in a significant sense between the groups. The briefest duration of transition to total oral feeding was seen in the BMO group. Conclusion: Individualized developmental care practices based on the results of these interventions are likely to support the care of preterm infants. Breast milk odor may ease the transition to breastfeeding.

Factors Influencing Developmental Care Practice Among Neonatal Intensive Care Unit Nurses

PURPOSE

This study aimed to examine factors that influence developmental care practice among neonatal intensive care unit nurses.

DESIGN AND METHODS

This descriptive, cross-sectional study was conducted using a questionnaire. Data were collected from 141 neonatal intensive care unit nurses from 6 hospitals in South Korea. Multiple linear regression analysis was used to examine factors influencing developmental care practice.

RESULTS

This study found that professional efficacy had the largest influence on developmental care practice, followed by perception of developmental care and a task-oriented organizational culture. Clinical and educational experience regarding developmental care and working environment was not associated with developmental care practice among NICU nurses.

CONCLUSIONS

To enhance nurses' practice of developmental care, enhancement of nurses' individual competency, positive perception of developmental care, and organizational efforts are required. A practical training program should be provided to nurses to promote confidence in implementing developmental care for preterm infants.

IMPLICATIONS

A trained nurse should provide staff nurses with useful information on developmental care to encourage them to have a positive attitude towards developmental care. The nurse manager should create an organizational culture in which nurses perceive developmental care to be an essential nursing task in their unit.

Targeted sensory enrichment interventions protect against behavioral and neuroendocrine consequences of early life stress

Both basic and clinical research support the use of tactile stimulation to rescue several neurobiobehavioral consequences that follow early life stress. Here, using a translational rodent model of the neonatal intensive care unit (NICU), we tested the individual prophylactic potential of a variety of sensory interventions including tactile (brushing pups with a paint brush to mimic maternal licking), auditory (a simulated lactating rat dam heart beat), and olfactory (a series of aroma therapy scents) stimulation. The NICU model was developed to mimic not only the reduced parental contact that sick infants receive (by isolating rat pups from their litters), but also the nosocomial infections and medical manipulations associated with this experience (by utilizing a dual lipopolysaccharide injection schedule). Each of the neurobiobehavioral consequences observed were dissociable between isolation and inflammation, or required a combined presentation ('two hits') of the neonatal stressors. Sprague-Dawley rats exposed to these early life stressors presented with sex-specific disruptions in both separation-induced ultrasonic vocalization (USV) distress calls (males & females) and juvenile social play USVs (males only). All three sensory enhancement interventions were associated with the rescue of potentiated distress calls while olfactory stimulation was protective of social vocalizations. Female rats exposed to early life stress experienced precocious puberty and shifts in the hypothalamic GnRh axis; sensory enrichment counter-acted the advanced pubertal onset. Animals that underwent the NICU protocol also displayed maturational acceleration in terms of the loss of the rooting reflex in addition to hyperalgesia, a reduced preference for a novel conspecific, blunted basal plasma corticosterone and reduced hippocampal glucocorticoid receptor expression. These alterations closely simulated the clinical effects of early life adversity in terms of disruptions in the hypothalamic pituitary "stress" axis, social communication and engagement, tactile system processing, and accelerated maturation. Moreover, sensory enrichment attenuated many of these behavioral and neurophysiological alterations, and even slowed maturation. Overall, this supports the translatability of our novel rodent model and its potential utility in understanding how brain maturation and quality of early life experiences may interact to shape the integrity of stress and sensory system development. Future work must determine the appropriate modalities and parameters (e.g. patterning, timing) for effective sensory enrichment interventions.

Effects of Covering the Eyes versus Playing Intrauterine Sounds on Premature Infants' Pain and Physiological Parameters during Venipuncture

BACKGROUND

There is a need to assess the impact of initiatives to reduce exposure to environmental light and sound in preterm infants undergoing painful interventions in neonatal intensive care units.

OBJECTIVES

In this study, we aimed to identify the effect of covering the eyes and playing the intrauterine ambient sounds on premature infants' pain and physiological parameters during venipuncture.

METHODS

This was a randomized controlled trial. Ninety-four preterm infants were randomly divided into three groups: intrauterine sounds (n=32), covered eyes (n=32), and control (n=30) groups. Data were collected on the Preterm Infant Information Form, Preterm Infant Follow-up Form, and Neonatal Infant Pain Scale (NIPS), used to assess pain.

RESULTS

A significant difference was found between the intervention and control groups' NIPS score after venipuncture, which was primarily due to covered eyes' group. No significant difference was found between the intervention and control groups' NIPS score during venipuncture. In addition, no significant difference was found between the intervention and control groups of infants physiological parameters before, during, and after venipuncture. The practice of covering preterm infants' eyes during venipuncture positively affected their pain scores after venipuncture.

CLINICAL IMPLICATIONS

The effect of covering the eyes and playing the intrauterine ambient sounds in preterm infants may be recommended as simple, safe, and supportive stimuli that facilitate positive effects during painful procedures.

Enhancing sensory experiences for very preterm infants in the NICU: an integrative review

OBJECTIVE

Very preterm infants hospitalized in the neonatal intensive care unit (NICU) experience alterations in sensory experiences. Defining types, timing and frequency of sensory-based interventions that optimize outcomes can inform environmental modifications. The objective of this study was to conduct an integrative review on sensory-based interventions used with very preterm infants in the NICU to improve infant and parent outcomes.

STUDY DESIGN

The data sources include MEDLINE, CINAHL, Cochrane Library and Google Scholar. Studies were identified that used sensory-based interventions in the NICU with preterm infants born ⩽32 weeks gestation, were published in a peer-reviewed journal between 1995 and 2015, and measured outcomes related to infant and parent outcomes. Studies were extracted from electronic databases and hand-searched from identified reference lists.

RESULTS

Eighty-eight articles were identified (31 tactile, 12 auditory, 3 visual, 2 kinesthetic, 2 gustatory/olfactory and 37 multimodal). There was evidence to support the use of kangaroo care, music and language exposure, and multimodal interventions starting at 25 to 28 weeks postmenstrual age. These interventions were related to better infant development and lower maternal stress, but not all findings were consistent. Limitations included lack of consistent outcome measures, study quality and gaps in the literature.

CONCLUSIONS

Most research identified interventions that were done for short periods of time. It is unclear what the potential is for improving outcomes if positive sensory exposures occur consistently throughout NICU hospitalization. Until more research defines appropriate sensory-based interventions to use with infants born very preterm in the NICU, information from this review can be combined with expert opinion and parent/family values to determine best practice.