Estimates of Preterm Infants' Breastfeeding Transfer Volumes Are Not Reliably Accurate

Clinical assessment of breastfeeding in preterm infants

Breastmilk confers empirical benefits for preterm infants, however direct breastfeeding rates in this population remain low. For preterm infants, it may be useful to assess the volume of breastmilk transferred from mother to baby when breastfeeding, particularly during transition to oral feeding when breastfeeding attrition is high. Establishing breastfeeding in preterm infants is complex and without knowledge of milk intake during breastfeeds there is risk of inaccurate feed supplementation with subsequent effects on growth and nutrition. Here we review the evidence for clinical assessments of breastfeeding in preterm infants including test weighing, use of isotope labelled water and clinical observation tools designed to estimate adequacy of breastfeeds. Test weighing is a validated measurement, however requires rigorous protocols and further investigation in small infants. Use of isotope labelled water is a validated technique but, due to sampling requirements, reflects intake over days and weeks instead of individual feeds. Clinical observation tools assessed in preterm infants, have not been shown to reflect volumes of breastmilk intake. While current methods have limitations, the goal is to identify measurement tools to be used as temporary aids to facilitate transition to direct breastfeeding while minimising risk of inaccurate supplementation.

Nutrition Management of High-Risk Neonates After Discharge

Nutrition management of the high-risk infant after hospital discharge is complicated by the infant's dysfunctional or immature oral feeding skills, nutritional deficits, and the family's feeding plan. Although evidence is limited, available studies point to developing an individualized nutritional plan, which accounts for these factors; protects and prioritizes the family's plan for breastfeeding; and promotes an acceptable growth pattern. Further research is needed to identify the type and duration of posthospital discharge nutrition to optimize high-risk infant neurodevelopment and body composition. Attention to infant growth, lactation support, and safe feed preparation practices are critical in the transition to home.

Human Milk Sodium and Potassium as Markers of Mastitis in Mothers of Preterm Infants

Introduction: This prospective longitudinal study examined changes in milk sodium concentration (Na) and sodium:potassium ratio (Na:K), microbiological culture, milk production, and breast health in relation to mastitis after preterm birth. Methods: We studied women who gave birth at 29-34 weeks of gestation in a tertiary obstetric hospital in Perth, Western Australia. Milk samples, 24-hour milk production, and breast health data were collected every second day to day 10 postpartum, then every third day until infant discharge from the neonatal unit. Milk Na and K were measured at point of care (POC) using handheld ion selective meters, and Na:K calculated. Cultures were performed on postnatal days 8, 13, and every 6 days thereafter. For episodes of mastitis, milk was cultured at onset, and Na and Na:K measured daily until resolution. Women were followed up at 4 and 8 weeks postpartum. Results: In a sample of 44 women, 4 mastitis cases were detected in 3 women during their infants' neonatal stay; all had elevated milk Na and Na:K that resolved within 48 hours; 2/4 experienced reduced milk production and 1/4 had heavy growth of Staphylococcus epidermidis. A further 2 mastitis cases were reported in 39 women followed up to 8 weeks postpartum. Four women had elevated milk Na and Na:K without clinical signs of mastitis; three also had reduced milk production. Conclusions: POC testing of milk Na and/or Na:K may offer a useful indicator of breast health. Mastitis may cause an acute reduction in milk production regardless of the presence of culture-positive infection.

Longitudinal Follow-up of Preterm Breastfeeding to 12 Weeks Corrected Gestational Age

BACKGROUND

Preterm infants have shorter breastfeeding duration than that of term infants. Details of postdischarge feeding methods and difficulties are needed to inform the care of preterm breastfeeding dyads.

PURPOSE

To describe postdischarge breastfeeding characteristics of mother-preterm infant dyads up to 12 weeks corrected gestational age (CGA).

METHODS

A prospective observational study of preterm dyads (birth 24-33 weeks' gestation) that fed their mother's own milk (MOM) at discharge from a neonatal unit in Perth, Western Australia. Feeding method and frequency, breastfeeding duration, difficulties, and nipple shield use were recorded at 2, 6, and 12 weeks CGA.

RESULTS

Data were obtained for 49 mothers (singleton infant n = 39, twins n = 10). At 12 weeks CGA, 59% fed any MOM with 47% exclusively fed MOM and 31% fully breastfed. Nipple shield use reduced from 42% at 2 weeks CGA to 11% at 12 weeks CGA. Compared with mothers who exclusively fed MOM at discharge (n = 41) those who fed both MOM and infant formula (n = 8) were more likely to wean before 12 weeks CGA ( P < .001). Weaning occurred before 2 weeks CGA in 12/19 (63%), with low milk supply the most frequently cited reason.

IMPLICATIONS FOR PRACTICE

Most mothers with a full milk supply at discharge successfully transition to predominant breastfeeding. Frequent milk removal needs to be prioritized throughout the preterm infant's hospital stay.

IMPLICATIONS FOR RESEARCH

Examination of facilitators and barriers to early and continued frequent milk removal across the postpartum period is required to identify strategies to optimize lactation after preterm birth.

Encourage, Assess, Transition (EAT): A Quality Improvement Project Implementing a Direct Breastfeeding Protocol for Preterm Hospitalized Infants

BACKGROUND

The opportunity to establish a direct breastfeeding (DBF) relationship with a preterm infant, if desired by the mother or lactating parent, is a known driver of positive healthcare experiences. Preterm birth is an independent risk factor for early human milk (HM) cessation, and DBF at the first oral meal promotes continued DBF during hospitalization and HM duration beyond discharge. While the Spatz 10-step model for protecting and promoting HM and breastfeeding in vulnerable infants provides best practices, lack of standardized implementation results in missed opportunities to meet parents' DBF goals.

PURPOSE

To standardize clinical practices to increase DBF at the first oral meal, total DBF meals during hospitalization, and use of test weighing to measure milk transfer for preterm infants.

METHODS

Quality improvement methods were used to develop and implement Encourage, Assess, Transition (EAT): a DBF protocol for infants less than 37 weeks gestation at birth, in a level II neonatal intensive care unit.

RESULTS

Thirty-eight (45%) infants from 27.7 to 36.7 weeks of gestation initiated the protocol. The proportion of infants' DBF at first oral meal increased from 22% to 54%; mean DBF meals during hospitalization increased from 13.3 to 20.3; and use of test weighing increased by 166%.

IMPLICATIONS FOR PRACTICE AND RESEARCH

Standardizing DBF practices with the EAT protocol increased DBF during hospitalization-a known driver of patient experience-and HM duration beyond discharge, in hospitalized preterm infants. Researchers should validate the reported benefits of EAT (increased DBF during hospitalization, use of test weighing, and improved patient experience), methods to promote passive dissemination of evidence, and sustain change.Video abstract available at: https://journals.na.lww.com/advancesinneonatalcare/pages/videogallery.aspx?autoPlay=false&videoId=61.

Evidence-based Discharge Nutrition to Optimize Preterm Infant Outcomes

Despite abundant research comparing postdischarge hospital diets for preterm infants, the ideal clinical approach has not been determined. Dilemmas persist because randomized controlled trials of preterm versus term infant formula have yielded equivocal results and because the predominant postdischarge diet for preterm infants has shifted from formula-based to a combination that includes maternal milk and increasingly includes a plan for breastfeeding. As the investigation of the influence of the post-hospital discharge diet on preterm infant outcomes evolves, factors to consider include the infant's oral feeding ability and the maternal lactation goal. The maturation of the preterm infant's oral feeding skills may at least partially explain why increased nutrient density appears to most benefit growth outcomes when given during the first 3 to 4 months after hospital discharge. At some point in maturation, the preterm infant may develop the ability to vary intake as needed to obtain sufficient nutrition no matter the density of the diet. In addition, attention to the maternal lactation goal is critical as intake of maternal milk likely influences neurodevelopmental outcomes as much or even to a greater extent than growth trajectory.

A Review of Quantitative Instruments for Understanding Breastfeeding Dynamics

Breastfeeding, as a unique behavior of the postpartum period and an ideal source of nourishment, is profoundly impacted by the physiology and behavior of both mothers and infants. For more than three-quarters of a century, there has been an ongoing advancement of instruments that permit insight into the complex process of latching during breastfeeding, which includes coordinating sucking, swallowing, and breathing. Despite the available methodologies for understanding latching dynamics, there continues to be a large void in the understanding of infant latching and feeding. The causes for many breastfeeding difficulties remain unclear, and until a clearer understanding of the mechanics involved is achieved, the struggle will continue in the attempts to aid infants and mothers who struggle to breastfeed. In this review, the history of development for the most prominent tools employed to analyze breastfeeding dynamics is presented. Additionally, the importance of the most advanced instruments and systems used to understand latching dynamics is highlighted and how medical practitioners utilize them is reported. Finally, a controversial argument amongst pediatric otolaryngolo gists concerning breastfeeding difficulties is reviewed and the urgent need for quantification of latching dynamics in conjunction with milk removal rate through prospective controlled studies is discussed.

25 Years of Research in Human Lactation: From Discovery to Translation

Researchers have recently called for human lactation research to be conceptualized as a biological framework where maternal and infant factors impacting human milk, in terms of composition, volume and energy content are studied along with relationships to infant growth, development and health. This approach allows for the development of evidence-based interventions that are more likely to support breastfeeding and lactation in pursuit of global breastfeeding goals. Here we summarize the seminal findings of our research programme using a biological systems approach traversing breast anatomy, milk secretion, physiology of milk removal with respect to breastfeeding and expression, milk composition and infant intake, and infant gastric emptying, culminating in the exploration of relationships with infant growth, development of body composition, and health. This approach has allowed the translation of the findings with respect to education, and clinical practice. It also sets a foundation for improved study design for future investigations in human lactation.

To Individualize the Management Care of High-Risk Infants With Oral Feeding Challenges: What Do We Know? What Can We Do?

The increase in preterm infants' survival over the last 30 years has shed light over their inability to feed by mouth safely and efficiently. With adverse events such as increased risks for oxygen desaturation, bradycardia, penetration/aspiration, infants' hospitalization in neonatal intensive care units (NICUs) are understandably prolonged. Unfortunately, this leads to delayed mother-infant reunion, maternal stress, breastfeeding obstacles, and increased medical costs. Such impediments have stimulated clinicians and researchers to better understand the underlying causes and develop evidence-based solutions to assist these infants. However, it is notable that the research-to-practice translation of this knowledge has been limited as there are still no validated guidelines or protocols as how to best diagnose and care for these infants. This report revisits the immature physiologic functions at the root of these infants' oral feeding difficulties, the current practices, and the recent availability of evidence-based efficacious tools and interventions. Taking advantage of the latter, it presents a renewed perspective of how management strategies can be tailored to the specific needs of individual patients.