Developmental patterns from 1 to 4 years of extremely preterm infants who required home oxygen therapy

Frequent hypoxemia found in infants with bronchopulmonary dysplasia after weaning home oxygen

OBJECTIVE

Parental reports and brief clinical examinations are the primary information used to assist clinicians in weaning home supplemental oxygen in infants with bronchopulmonary dysplasia (BPD). Recorded nocturnal oximetry provides an objective assessment of hypoxemia; however, it is unknown if it identifies clinically undetected hypoxemia in the home setting. Our objective was to determine if nocturnal oximetry can identify unreported hypoxemia in infants with BPD who appear ready to wean from supplemental oxygen.

STUDY DESIGN

We conducted a retrospective chart review of infants born <32 weeks gestation with BPD who were discharged to home receiving supplemental oxygen and completed recorded nocturnal oximetry in room air during an 18-month period. Abnormal oximetry was defined as >5 min with SpO₂  < 90% and/or an oxyhemoglobin desaturation index (ODI4) >5. Comparative analysis of patients with normal and abnormal overnight oximetry was performed using Fisher Exact and Wilcoxon signed-rank test.

RESULTS

Thirty-five former premature infants completed nocturnal oximetry at 5.8 (3.4-8.3) months corrected age. Nocturnal oximetry was abnormal as defined in 67% of the cohort (n = 21). Five percent of patients were hypoxemic, 52% had frequent desaturation events, and 43% had both. No significant differences existed in neonatal characteristics between patients with normal and abnormal studies.

CONCLUSIONS

Nocturnal oximetry was abnormal in the majority of infants with BPD who were otherwise clinically ready to wean from oxygen support, suggesting that recorded home oximetry could be a feasible and useful tool to evaluate for otherwise clinically unapparent nocturnal hypoxemia in patients with BPD.

Longitudinal Cognitive Assessment in Low-Risk Very Preterm Infants

Background and Objectives: Preterm infants are at higher risk of neurodevelopmental impairment both at preschool and school ages, even in the absence of major neurological deficits. The early identification of children at risk is essential for early intervention with rehabilitation to optimize potential outcomes during school years. The aim of our study is to assess cognitive outcomes at preschool age in a cohort of low-risk very preterm infants, previously studied at 12 and 24 months using the Griffiths scales. Materials and Methods: Sixty-six low-risk very preterm infants born at a gestational age of <32 weeks were assessed at 12 and 24 months corrected age using the Griffiths Mental Development Scales (second edition) and at preschool age with the Wechsler Preschool and Primary Scales of Intelligence (third edition) (WPPSI-III). Results: At 12 and 24 months and at preschool age, low-risk very preterm infants showed scores within normal ranges with similar scores in males and females. A statistically significant correlation was observed in the general developmental quotient between 12 and 24 months; a further significant correlation was observed between the early cognitive assessments and those performed at preschool age, with a better correlation using the assessments at 24 months. Conclusion: The present study showed a favourable trajectory of cognitive development in low-risk very preterm infants, from 12 months to preschool age.

Impact of tracheostomy on language and cognitive development in infants with severe bronchopulmonary dysplasia

OBJECTIVE

The impact of tracheostomy on language and cognitive development in infants with severe bronchopulmonary dysplasia (BPD) is not known. We hypothesize that tracheostomy has an independent negative impact on language and cognitive development in infants with severe BPD.

STUDY DESIGN

This is a retrospective cohort study of de-identified data of infants with severe BPD who received tracheostomy at <2 years of age, compared with infants with severe BPD without tracheostomy. The primary outcomes measured were total language and cognitive scores at 2-3 years of age as determined by Bayley Scales of Infant and Toddler Development, 3rd Edition.

RESULTS

A total of 26 patients with tracheostomies and 28 patients without tracheostomies were analyzed. There was no significant difference in total language development or cognitive development between patients with tracheostomies and those without. Insurance status had an effect on language and cognition while controlling for trach status.

CONCLUSIONS

Tracheostomy does not independently impact the language and cognitive development of infants with severe BPD.

Need for supplemental oxygen at discharge in infants with bronchopulmonary dysplasia is not associated with worse neurodevelopmental outcomes at 3 years corrected age

OBJECTIVES

To determine if chronic oxygen dependency (discharge home on supplemental oxygen) in children with bronchopulmonary dysplasia (BPD; defined as requirement for supplemental O2 at 36 weeks postmenstrual age) predicts neurodevelopmental disability rates and growth outcomes at 36 months corrected age (CA).

STUDY DESIGN

Longitudinal cohort study.

SETTING

Southern Alberta regional center located at high altitude.

PARTICIPANTS

Preterm infants weighing ≤1250 grams with no BPD, BPD, and BPD with chronic oxygen dependency.

MAIN OUTCOME MEASURES

Neurodevelopmental and growth outcomes.

RESULTS

Of 1563 preterm infants admitted from 1995-2007, 1212 survived. Complete follow-up data were available for 1030 (85%) children. Children in BPD and BPD with chronic oxygen dependency groups had significantly lower birth weights, gestational ages, prolonged mechanical ventilation and oxygen supplementation and received more postnatal steroids, compared to those without BPD. Children with BPD and BPD with chronic oxygen dependency were more likely to be below the 5th centile in weight and height compared to those without BPD but there was little difference between the BPD and BPD with chronic oxygen dependency groups. After controlling for confounding variables, children who had BPD and BPD with chronic oxygen dependency had higher odds of neurodevelopmental disability compared to those without BPD [OR (odds ratio) 1.9 (95%CI 1.1 to 3.5) and OR 1.8 (1.1 to 2.9), respectively], with no significant difference between BPD and BPD with chronic oxygen dependency [OR 0.9 (95% CI 0.6 to 1.5)].

CONCLUSIONS

BPD and BPD with chronic oxygen dependency in children predicts abnormal neurodevelopmental outcomes at 36 months CA. However, the neurodevelopmental disability rates were not significantly higher in BPD with chronic oxygen dependency children compared to children with BPD only. Compared to those without BPD, growth is impaired in children with BPD and BPD with chronic oxygen dependency, but no difference between the latter two groups.

Associations among perinatal factors and age of achievement of full oral feeding in very preterm infants

BACKGROUND

Progress to full oral feeding from a tube or parenteral feeding is a complex process for very preterm infants born before 32 weeks of gestation. The influence of infant characteristics and medical complications on feeding progression has not been studied thoroughly. The aim of this study was to constitute a regression model to estimate the postmenstrual age (PMA) of full oral feeding and the length of transition time from the initiation to completion of oral feeding.

METHODS

A chart review was conducted on very preterm infants born between 2005 and 2010 in one medical center in Taiwan. All enrolled infants were able to take all nutrition by mouth before discharge.

RESULTS

A total of 117 infants fulfilling the criteria were included. The mean PMAs for the initiation and completion of oral feeding were 33.9 ± 1.7 and 35.1 ± 2.0 weeks, respectively. Infants required 7.5 ± 6.6 days from initiation to full oral feeding. The results of a stepwise regression revealed that the reciprocal of birth weight (beta coefficient = 3.81, p < 0.001), moderate-severe bronchopulmonary dysplasia (beta coefficient = 1.21, p < 0.001), necrotizing enterocolitis (beta coefficient = 0.84, p < 0.005), and patent ductus arteriosus (beta coefficient = 0.69, p < 0.01) were predictors for the PMA of full oral feeding. The regression model incorporating those factors explained 62.5% of the variation in the feeding outcome (p < 0.001). Gender, multiple gestations, mild bronchopulmonary dysplasia, intraventricular hemorrhage, and sepsis had no effect on the feeding outcome. None of the explored factors were significantly correlated with transition time.

CONCLUSION

A regression model incorporating significant predictors to estimate the PMA of full oral feeding in very preterm infants was suggested. It could enhance communication between health professionals and parents about the feeding progress of infants born very prematurely.

Recommendations for long-term home oxygen therapy in children and adolescents

OBJECTIVE

To advise pediatricians, neonatologists, pulmonologists, pediatric pulmonologists, and other professionals in the area on the main indications and characteristics of long-term home oxygen therapy in children and adolescents.

DATA SOURCE

A literature search was carried out in the MEDLINE/PubMed database (1990 to 2011). Additionally, references from selected studies were included. As consistent scientific evidence does not exist for many aspects, some of the recommendations were based on clinical experience.

DATA SYNTHESIS

Long-term home oxygen therapy has been a growing practice in pediatric patients and is indicated in bronchopulmonary dysplasia, cystic fibrosis, bronchiolitis obliterans, interstitial lung diseases, and pulmonary hypertension, among others. The benefits are: decrease in hospitalizations, optimization of physical growth and neurological development, improvement of exercise tolerance and quality of sleep, and prevention of pulmonary hypertension/cor pulmonale. The levels of oxygen saturation indicative for oxygen therapy differ from those established for adults with chronic obstructive pulmonary disease, and vary according to age and disease. Pulse oximetry is used to evaluate oxygen saturation; arterial blood gas is unnecessary. There are three available sources of oxygen: gas cylinders, liquid oxygen, and oxygen concentrators. The flows used are usually smaller, as are the number of hours/day needed when compared to the use in adults. Some diseases show improvement and oxygen therapy discontinuation is possible.

CONCLUSIONS

Long-term home oxygen therapy is increasingly common in pediatrics and has many indications. There are relevant particularities when compared to its use in adults, regarding indications, directions for use, and monitoring.

Reliability of the assessment of mother-infant sensitivity-chinese version for preterm and term taiwanese mother-infant dyads

PURPOSE

The objectives of this study were to translate and modify the Assessment of Mother-Infant Sensitivity scale into a Chinese version (modified AMIS-C) and to examine its reliability with preterm and term Taiwanese mother-infant dyads.

METHOD

A total of 241 mother-infant pairs (179 preterm dyads and 62 term dyads) were prospectively recorded and their behaviour in feeding assessed using the modified AMIS-C when infants were at 4 and 6 months corrected age. A subset of the sample was used for interrater reliability testing, and the whole sample was used for assessment of internal consistency.

RESULTS

Interrater reliability was high for the modified AMIS-C section and total scores (intra-class correlation coefficients=0.91-0.99). Internal consistency was good to excellent for the maternal section and total score (α=0.71-0.86) and was fair to good for the infant and dyadic section score (α=0.44-0.75).

CONCLUSIONS

The modified AMIS-C scale is a clinically feasible and reliable instrument for assessing mother-infant interaction of preterm and term dyads during early infancy.

Respiratory morbidity, healthcare utilisation and cost of care at school age related to home oxygen status

The aim of the study was to determine whether respiratory morbidity, lung function, healthcare utilisation and cost of care at school age in prematurely born children who had bronchopulmonary dysplasia (BPD) were influenced by use of supplementary oxygen at home after neonatal intensive care unit discharge. Healthcare utilisation and cost of care in years 5 to 7 and respiratory morbidity (parent-completed respiratory questionnaire) and lung function measurements at least at age 8 years were assessed in 160 children. Their median gestational age was 27 (range 22-31) weeks and 65 of them had received supplementary oxygen when discharged home (home oxygen group). The home oxygen group had more outpatient attendances (p = 0.0168) and respiratory-related outpatient attendances (p = 0.0032) with greater related cost of care (p = 0.0186 and p = 0.0030, respectively), their cost of care for prescriptions (p = 0.0409) and total respiratory related cost of care (p = 0.0354) were significantly greater. There were, however, no significant differences in cough, wheeze or lung function results between the two groups.

CONCLUSION

Prematurely born children who had BPD and supplementary oxygen at home after discharge had increased healthcare utilisation at school age. Whether such children require greater follow, in the absence of excess respiratory morbidity, merits investigation.

Maternal role attainment with medically fragile infants: Part 2. relationship to the quality of parenting

We examined which components of maternal role attainment (identity, presence, competence) influenced quality of parenting for 72 medically fragile infants, controlling for maternal education and infant illness severity. Maternal competence was related to responsiveness. Maternal presence and technology dependence were inversely related to participation. Greater competence and maternal education were associated with better normal caregiving. Presence was negatively related although competence was positively related to illness-related caregiving. Mothers with lower competence and more technology dependent children perceived their children as more vulnerable and child cues as more difficult to read. Maternal role attainment influenced parenting quality for these infants more than did child illness severity; thus interventions are needed to help mothers develop their maternal role during hospitalization and after discharge. © 2010 Wiley Periodicals, Inc. Res Nurs Health 34:35-48, 2011.

[Ages of sitting up and walking in preterm newborns less than 1,500 G with bronchopulmonary dysplasia]

INTRODUCTION

Adverse neurological events in very low birth weight (VLBW) children with bronchopulmonary dysplasia (BPD) are more frequent than in children without. An understanding of the ages when preterm infants acquire certain motor skills will give parents more appropriate information on motor development. The objective of the present study is to estimate the influence between BPD and the age of acquisition of sitting unsupported and independent walking in VLBW children with normal neurological examination at 2 years of corrected age.

PATIENTS AND METHODS

A longitudinal study was conducted on a cohort of 885 children with VLBW, admitted to the Hospital "12 de Octubre" between January 1991 and December 2003. Age for both skills was established by interview with parents. Means were compared with t-test and Bonferroni adjustment where appropriate.

RESULTS

Both motor skills were acquired later in the group with BPD (7.8±2m vs. 7.1±1.3m for sitting unsupported and 14.5±3.8m vs. 13.4±2.5m for walking) (P<.001). BPD was associated with delayed acquisition (above p90) of these skills, OR=2.6 (1.6-4.1) for sitting and OR=2.8 (1.6-4.8) for walking. Association was found after adjusting for gestational age (GA) and weight.

CONCLUSION

BPD was associated with delayed acquisition of both skills in VLBW children with normal neurological examination at 2 years.