Cerebral Oxygenation and Perfusion when Positioning Preterm Infants: Clinical Implications

Analysis of Fractional Cerebral Oxygen Extraction in Preterm Infants during the Kangaroo Care

INTRODUCTION

We aimed to investigate the cerebral fractional tissue oxygen extraction (FtOE) during kangaroo care (KC) in premature infants and compare cardiorespiratory stability and hypoxic or bradycardic events between KC and incubator care.

METHODS

A single-center prospective observational study was carried out at the NICU of a level 3 perinatal center. Preterm infants <32 weeks gestational age were subjected to KC. Patients were subjected to continuous monitoring of regional cerebral oxygen saturation (rScO2), peripheral oxygen saturation (SpO2), and heart rate (HR) during KC, before KC (pre-KC), and after KC (post-KC). The monitoring data were stored and exported to MATLAB for synchronization and signal analysis including the calculation of the FtOE and events analysis (i.e., desaturations and bradycardias counts and anormal values). Furthermore, the event counts and the mean SpO2, HR, rScO2, and FtOE were compared between studied periods employing the Wilcoxon rank-sum test and the Friedman test, respectively.

RESULTS

A total of forty-three KC sessions with their corresponding pre-KC and post-KC segments were analyzed. The distributions of the SpO2, HR, rScO2, and FtOE showed different patterns according to the respiratory support, but not differences between the studied periods were detected. Accordingly, no significant differences in monitoring events were evidenced. However, cerebral metabolic demand (FtOE) was significantly lower during KC compared with post-KC (p = 0.019).

CONCLUSION

Premature infants remain clinically stable during KC. Moreover, cerebral oxygenation is significantly higher and cerebral tissular oxygen extraction is significantly lower during KC compared with incubator care in post-KC. No differences in HR and SpO2 were shown. This novel data analysis methodology could be expanded to other clinical situations.

Regional oxygenation, perfusion and body and/or head position: Are preterm infants adversely impacted? A systematic review

This review addresses regional oxygenation and perfusion changes for preterm infants and changes with body position, with or without head rotation. Future directions for improving neurodevelopmental and clinical outcomes are suggested. The MEDLINE, Embase and Scopus databases were searched up to July 2021. Fifteen out of 470 studies met the inclusion criteria. All were prospective, observational studies with a moderate risk of bias. Significant variation was found for the baseline characteristics of the cohort, postnatal ages, and respiratory support status at the time of monitoring. When placed in a non-supine position, preterm infants showed a transient reduction in cardiac output and stroke volume without changes to heart rate or blood pressure. No studies reported on long-term neurodevelopmental outcomes. Overall, side lying or prone position does not appear to adversely affect regional, and specifically cerebral, oxygenation or cerebral perfusion. The effect of head rotation on regional oxygenation and perfusion remains unclear.

Effects of Family Participatory Nursing on Clinical Outcomes of Premature Infants in NICU and Families’ Psychological Status

The purpose of this study was to explore the effects of family participatory nursing on the clinical outcomes of premature infants in the neonatal intensive care unit (NICU) and their families’ psychological status. Total of 150 premature infants were admitted to the NICU of our hospital from December 2019 to December 2021, and their families were selected by convenience sampling method and divided into control group (n = 78, from December 2019 to December 2020) and observation group (n = 72, from January 2020 to December 2021) according to the admission time. The infants in the control group were given routine nursing, while those in the observation group received family participatory nursing. In the observation group, the length of stay and duration of oxygen therapy were shorter, the weight gain speed was higher, and the incidence rate of nosocomial infection was lower than those in control groups $\left(P<0.05\right)$ . The time of reaching full gastrointestinal feeding was earlier, the daily milk intake and exclusive breastfeeding rate were higher, and the feeding intolerance rate was lower in observation group than those in control group $\left(P<0.05\right)$ . Observation group exhibited significantly higher body weight, Z-value of body weight, NBNA score at 7 d after hospitalization, 15-month mental development index (MDI), and psychomotor development index (PDI) scores than control group $\left(P<0.05\right)$ . In addition, the families’ somatization, depression and anxiety factor scores, and total score of SCL-90 in the observation group were lower than those in the control group, while each dimension score and total score of MPOC-20 were higher than those in control groups $\left(P<0.05\right)$ . Family participatory nursing is of great significance in ameliorating the clinical outcomes of premature infants in the NICU, which can shorten the length of stay, improve feeding conditions, facilitate infant growth and development, and enhance their families’ psychological status and nursing satisfaction.