Comparison of the efficacy and safety of cuffed versus uncuffed endotracheal tubes for infants in the intensive care setting: a pilot, unblinded RCT.

OBJECTIVE: To study effectiveness and safety of cuffed versus uncuffed endotracheal tubes (ETTs) in small infants in the intensive care unit (ICU). DESIGN: Pilot RCT. SETTING: Neonatal and paediatric ICUs of children's hospital in Western Australia. PARTICIPANTS: Seventy-six infants ≥35 weeks gestation and infants <3 months of age, ≥3 kg. INTERVENTIONS: Patients randomly assigned to Microcuff cuffed or Portex uncuffed ETT. MAIN OUTCOMES MEASURES: Primary outcome was achievement of optimal ETT leak in target range (10%-20%). Secondary outcomes included: reintubations, ventilatory parameters, ventilatory complications, postextubation complications and long-term follow-up. RESULTS: Success rate (achievement of mean leak in the range 10%-20%) was 13/42 (30.9%) in the cuffed ETT group and 6/34 (17.6%) in uncuffed ETT group (OR=2.09; 95% CI (0.71 to 6.08); p=0.28). Mean percentage time within target leak range in cuffed ETT group 28% (IQR: 9-42) versus 15% (IQR: 0-28) in uncuffed ETT group (p=0.01). There were less reintubations to optimise size in cuffed ETT group 0/40 versus 10/36 (p<0.001). No differences were found in gaseous exchange, ventilator parameters or postextubation complications. There were fewer episodes of atelectasis in cuffed ETT group 0/42 versus 4/34 (p=0.03). No patient had been diagnosed with subglottic stenosis at long-term follow-up. CONCLUSIONS: There was no difference in the primary outcome, though percentage time spent in optimal leak range was significantly higher in cuffed ETT group. Cuffed ETTs reduced reintubations to optimise ETT size and episodes of atelectasis. Cuffed ETTs may be a feasible alternative to uncuffed ETTs in this group of patients. TRIAL REGISTRATION NUMBER: ACTRN12615000081516.

Long-term medical and psychosocial outcomes in congenital diaphragmatic hernia survivors.

OBJECTIVE: Survival rates for congenital diaphragmatic hernia (CDH) are increasing. The long-term outcomes of CDH survivors were compared with a healthy control group to assess the morbidity for guidance of antenatal counselling and long-term follow-up programmes. PARTICIPANTS AND DESIGN: Participants born with CDH in Western Australia 1993-2008 were eligible with matched controls from the general population. Participants had comprehensive lung function tests, echocardiogram, low-dose chest CT scan and completed a Strengths and Difficulties Questionnaire (SDQ) and quality of life (QOL) questionnaire. RESULTS: 34 matched case-control pairs were recruited. Demographic data between groups were similar. Cases were smaller at follow-up (weight Z-score of -0.2vs0.3; p=0.03; height Z-score of -0.3vs0.6; p=0.01). Cases had lower mean Z-scores for forced expiratory volume in 1 s (FEV1) (-1.49 vs -0.01; p=0.004), FEV1/forced vital capacity (-1.92 vs -1.2; p=0.009) and forced expiratory flow at 25-75% (FEF25-75) (-1.18vs0.23; p=0.007). Cases had significantly worse respiratory mechanics using forced oscillation technique. Subpleural triangles architectural distortion, linear opacities and scoliosis on chest CT were significantly higher in cases. Prosthetic patch requirement was associated with worse lung mechanics and peak cough flow. Cases had significantly higher rates of gastro-oesophageal reflux disease (GORD) and GORD medication usage. Developmental delay was significantly higher in cases. More cases had a total difficulties score in the high to very high range (25% vs 0%, p=0.03) on the SDQ and reported lower objective QOL scores (70.2 vs 79.8, p=0.02). CONCLUSION: Survivors of CDH may have significant adverse long-term medical and psychosocial issues that would be better recognised and managed in a multidisciplinary clinic.

Cuffed endotracheal tubes in infants less than 3 kg: A retrospective cohort study.

BACKGROUND: Cuffed endotracheal tubes are being increasingly used in infants; however, current evidence in the literature mostly includes infants ≥ 3-kg weight. AIMS: The aim of this observational study was to compare the short-term outcomes with the use of Microcuff® cuffed vs uncuffed endotracheal tubes in neonates < 3 kg. METHODS: We performed a retrospective cohort study in a single-centre, tertiary children's hospital neonatal intensive care unit. The study included all infants < 3 kg receiving Microcuff® cuffed endotracheal tubes over the period January 2015 to January 2016. Controls were all infants 2000-2999 g receiving an uncuffed endotracheal tube over the period September 2015 to January 2016. RESULTS: Twenty-three patients < 3 kg were intubated with cuffed endotracheal tubes. All were inserted in the operating room. Of 23 patients, 14 (60.9%) patients had the cuff inflated in the operating room and none subsequently in the neonatal intensive care unit. The group receiving cuffed endotracheal tubes was compared with 23 patients with uncuffed endotracheal tubes. There was no difference in weight (median 2620 g vs 2590 g, diff in median = 10, 95% CI -120, 130) or duration of intubation (median 27 vs 44 hours, diff in median = 17, 95% CI -5, 46). However, there was a significant difference in gestational age (median 37 vs 35 weeks, diff in median = -1, 95% CI -2, 0) and age at intubation (median 6 vs 0 days, diff in median = -4, 95% CI -10, -1). There were no significant differences in the rates of: change of endotracheal tube to find correct size (0/23 vs 4/23, P = .109, OR = 0.13, 95% CI 0.01, 1.41); median ventilator leak reading (0% [IQR 0%-12%] vs 0% [IQR 0%-5.5%], P = .201, diff in median = 0, 95% CI -5.5, 0); unplanned extubations (0/23 vs 2/23; atelectasis (4/23 vs 0/23; endotracheal tube blockage (0/23 vs 0/23; pneumonia (0/23 vs 0/23; or postextubation stridor (1/23 vs 2/23). CONCLUSION: This retrospective study with a small sample size found that Microcuff® cuffed endotracheal tubes may be safe in neonates < 3 kg. Well-designed randomized controlled trials are needed to address this issue definitively.

Severe acquired subglottic stenosis in neonatal intensive care graduates: a case-control study.

OBJECTIVE: To analyse current incidence and risk factors associated with severe acquired subglottic stenosis (SASGS) requiring surgical intervention in neonates. DESIGN: Retrospective case-control study. SETTING: Sole tertiary children's hospital. PARTICIPANTS: Patients who underwent surgical intervention for SASGS from January 2006 to December 2014. For each neonatal intensive care unit (NICU) graduate with acquired SASGS, two controls were selected (matched for gestation and year of birth). MAIN OUTCOMES AND MEASURES: Incidences were calculated and cases and controls compared using conditional logistic regression analysis to identify risk factors for SASGS. RESULTS: Thirty-seven NICU graduates required surgical intervention for SASGS of whom 35 were <30-week gestation at birth. The incidence of SASGS in surviving children who had required ventilation in the neonatal period was 27/2913 (0.93%). Incidence was higher in infants <28-week gestation (24/623=3.8%) compared with infants ≥28-week gestation (3/2290=0.13%; p=0.0001). On univariate analysis, risk factors for SASGS were: higher number of intubations (4 vs 2; p<0.001); longer duration ventilation (16 vs 9.5 days; p<0.001); unplanned extubation (45.7% vs 20.0%; p=0.007); traumatic intubation (34.3% vs 7.1%; p=0.003) and oversized endotracheal tubes (ETTs) (74.3% vs 42.9%; p=0.001). On multivariate analysis, risk factors for SASGS were: Sherman ratio >0.1 (adjusted OR (aOR) 6.40; 95% CI 1.65 to 24.77); more than five previous intubations (aOR 3.74; 95% CI 1.15 to 12.19); traumatic intubation (aOR 3.37; 95% CI 1.01 to 11.26). CONCLUSIONS: SASGS is a serious consequence of intubation for mechanical ventilation in NICU graduates, especially in preterm infants. Minimising trauma during intubations, avoiding recurrent extubation/reintubations and using appropriate sized ETTs may help prevent this serious complication.

Impact of hypoglycaemia on neurodevelopmental outcomes in hypoxic ischaemic encephalopathy: a retrospective cohort study.

BACKGROUND: Low blood glucose levels (BGLs) in infants are known to adversely affect neurodevelopmental outcomes. However, this risk is not well explored in infants with hypoxic ischaemic encephalopathy (HIE) that receive therapeutic hypothermia (TH). Additionally, little information is available on the optimal BGLs to target in infants with HIE. AIM: To explore the association between hypoglycaemia and neurodevelopmental outcomes at different BGL thresholds (2.6 and 3.0 mmol/L) in neonates with HIE treated with TH. METHODS: Retrospective cohort study. Clinical information and 2-year neurodevelopmental data using Bayley Scales of Infant Development, third edition (BSID-III) and disabilities were recorded for infants born in Western Australia with HIE and treated with TH between February 2008 and February 2012. Multivariable logistic regression models explored the association between hypoglycaemia and neurodevelopmental outcomes. RESULTS: 122 infants underwent a total of 1616 BGL estimations before and during 72 hours of TH. Hypoglycaemia (BGL<2.6 mmol/L) occurred in 38/122 (31%) infants and 11/122 (9%) had recurrent hypoglycaemia (three or more episodes). Infants with recurrent hypoglycaemia (<2.6 mmol/L) had significantly lower mean BSID-III cognitive, language and socioemotional subscale scores. On multivariable analysis, recurrent hypoglycaemia (<2.6 mmol/L) was associated with increased odds of death or disability (adjusted OR 8.15; 95% CI 1.31 to 50.58; p=0.024). Recurrent hypoglycaemia (<3.0 mmol/L) during the first 12 hours of life was also associated with severe disability among survivors (adjusted OR 11.13; 95% CI 2.06 to 59.89; p=0.005). CONCLUSIONS: Early recurrent hypoglycaemia was associated with increased risk of death or severe disability in neonates undergoing TH for HIE. Prospective studies are needed to identify the ideal target BGL in this population.

A modern era comparison of right versus left sided congenital diaphragmatic hernia outcomes.

BACKGROUND/PURPOSE: This study aims to retrospectively review outcomes, including neurodevelopmental outcomes, of neonatal right sided congenital diaphragmatic hernias (RCDH) compared with left sided congenital diaphragmatic hernias (L-CDH) treated surgically at our institute. METHODS: A retrospective review was undertaken of all cases of congenital diaphragmatic hernia (CDH) treated at Princess Margaret Hospital for Children (PMH), Perth, born between 1st January 2002 and 1st August 2012. The outcomes of R-CDH cases were compared with L-CDH cases. We examined duration of ventilatory support, use of patch versus primary closure, the CDH recurrence rates, the number of reoperations and neurodevelopmental follow-up at one year of age. RESULTS: Forty-nine cases of CDH were operated on at PMH during the 10-year period. Of these, ten cases were R-CDH with 39 L-CDH cases. Of 49 cases, 34 were diagnosed antenatally, 5 R-CDH versus 29 L-CDH. Only 8/39 cases of L-CDH required patch repair for larger defects, while 5/10 R-CDH required patch repair. Postoperative mortality was 6/49 (1/10 right sided versus 5/39 left sided). Recurrence was observed in 5/10 R-CDH versus 6/39 L-CDH with p=0.03. Thirty-three of 43 surviving patients received one-year follow-up with Griffiths general quotient (GQ) assessment demonstrating a median score of 98 for L-CDH (IQR 86 to 104.25) and 91 for R-CDH (IQR 76.5 to 93). CONCLUSIONS: R-CDH required patch repair more commonly than L-CDH because of larger defect size or complete agenesis. The rate of recurrent herniation was the only morbidity significantly higher in the R-CDH group. Survivors of R-CDH did not have a significant difference in neurodevelopmental outcome compared to L-CDH cases, with both groups exhibiting normal median GQ scores at one year of age.

Cuffed endotracheal tubes for neonates and young infants: a comprehensive review.

Traditionally, uncuffed endotracheal tubes (ETTs) have been used for artificial ventilation of infants and children. More recently, newer designed high-volume low-pressure (HVLP) cuffed ETTs are being used with increasing frequency in infants from birth. Considering that many paediatric anaesthetists and intensivists are already using cuffed ETTs in infants >3 kg from birth, should neonatologists be doing the same? This review examines the reasons behind the traditional use of uncuffed ETTs and the problems associated with their use; newer HVLP cuffed ETTs and what they can potentially offer neonates; and reviews evidence from studies comparing the use of cuffed and uncuffed ETTs in neonates and small infants.

The long-term neurodevelopmental and psychological outcomes of gastroschisis: A cohort study.

OBJECTIVES: Previous gastroschisis specific neurodevelopmental studies have focused on the first 3years of life. The aim of this study was to assess the intellectual, behavioral and neurological outcomes of older children and adolescents born with gastroschisis. STUDY DESIGN: Of 99 gastroschisis survivors born in Western Australia, 1992 to 2005, and who were at least 5years old, 42 agreed to take part in this study. The study assessed: intellectual ability, with age appropriate Wechsler intelligence scales; neurological status; hearing; vision; behavioral status with the Strengths and Difficulties Questionnaire (SDQ); and parenting style with the Parenting Relationship Questionnaire (PRQ). All results were compared to normative means. RESULTS: Median age at follow-up was 10years (range 5-17). No child had evidence of cerebral palsy or hearing loss; 1 child had amblyopia. Psychometric tests were completed in 39 children: mean full scale IQ was 98.2 (standard deviation [SD] 10.7); the working memory index was the only subscale to show a significant decrease from the normative mean (mean 95.5, SD 12.4, p=0.038). The mean SDQ behavioral scores were significantly lower for 3 of 5 domains and the Total Difficulties score. PRQ scores were significantly abnormal for 4 of 7 domains: Communication, Discipline, Satisfaction with School and Relational Frustration. CONCLUSIONS: Overall intellectual abilities were within a normal range. The decrease in working memory index and the behavioral and parenting relationship impairments could be an effect of perinatal factors, gastroschisis management and complications or the complexity of the socio-economic environment.

The long term physical consequences of gastroschisis.

PURPOSE: To determine the progress, physical and metabolic outcomes of gastroschisis survivors. METHODS: Fifty children born with gastroschisis were assessed with a health questionnaire, physical assessment, bone density and nutritional blood parameters at a median age of 9years (range 5-17). RESULTS: After initial abdominal closure, 27/50 (54%) required additional surgical interventions. Ten (20%) children had complex gastroschisis (CG). Abdominal pain was common: weekly in 41%; and requiring hospitalization in 30%. The weight, length and head circumference z-scores improved by a median 0.88 (p=0.001), 0.56 (p=0.006) and 0.74 (p=0.018) of a standard deviation (SD) respectively from birth; 24% were overweight or obese at follow up. However, those with CG had significantly lower median weight z-scores (-0.43 v 0.49, p=0.0004) and body mass index (BMI) (-0.48 v 0.42, p=0.001) at follow up compared to children with simple gastroschisis. Cholesterol levels were elevated in 24% of children. Bone mineral density was reassuring. There were 15 instances of low blood vitamin and mineral levels. CONCLUSIONS: Although gastroschisis survival levels are high, many children have significant ongoing morbidity. Children with simple gastroschisis showed significant catch up growth and a quarter had become overweight.

Growth and developmental outcomes of infants with hirschsprung disease presenting in the neonatal period: a retrospective study.

OBJECTIVES: To describe the presentation and progress over the first year of life of neonates with Hirschsprung disease, to describe their physical and developmental outcomes at 12 months of age, and to compare the outcomes of infants with short- vs long-segment Hirschsprung disease. STUDY DESIGN: A retrospective study of neonates born with Hirschsprung disease in Western Australia between January 1, 2001, and December 31, 2010, to review their presentation, progress, growth, and development at 12 months of age. RESULTS: Fifty-four infants were identified (40 with short and 11 with long segment and 3 with total colonic aganglionosis); 9 infants had a recognized syndrome and 1 infant died, unrelated to Hirschsprung disease. A primary pull-through procedure was performed in 97% and 21% of neonates with short- and non-short-segment Hirschsprung disease, respectively; 17 (31%) infants developed anal stenosis requiring dilatations. Enterocolitis occurred in 14 (26%) infants. Griffiths Mental Development Scale scores (1 year) were available in 31 of 45 nonsyndromic survivors: mean general quotient (94.2, SD 8.89) was significantly less than the population mean (P = .007), but the number of infants with developmental delay was within the expected range. Physical growth, except length, appeared adequate in nonsyndromic infants. There were no significant differences in the outcomes of infants with short- vs non-short-segment Hirschsprung disease. CONCLUSIONS: At 1 year of age, many infants with Hirschsprung disease have ongoing gastrointestinal problems. Their overall growth appears satisfactory, and most infants are developing normally; however, their mean general quotient appears shifted to the left. Longer-term studies will better define developmental outcomes.

Growth and developmental outcomes of infants with gastroschisis at one year of age: a retrospective study.

BACKGROUND: The aim of the study was to describe the physical growth and developmental outcomes of babies born with gastroschisis. METHODS: We retrospectively reviewed all cases of gastroschisis in Western Australia born between 1997 and 2010. RESULTS: In the 128 pregnancies with fetal gastroschisis, 117 babies were live born. 112 (95.7%) survived to one year. 19% had z scores of<-1.28 for weight at birth (<10th centiles) compared with 30% at one year. Neurodevelopmental data were available in 88/112 (79%) of survivors (Griffiths scores in 67; reports of ages and stages questionnaire (ASQ) in 21). The mean GQ at 12 months was 99 (SD 9.8). Suboptimal neurodevelopmental outcomes were noted in eight. Complex gastroschisis (present at birth) and acquired gut related complications were associated with adverse long term outcomes. The incidence of acquired gut complications was least (5%) in those who underwent silo reduction as the primary management. However, on univariate and multivariate analysis, the type of primary reduction did not significantly influence the outcome. CONCLUSIONS: A large proportion of infants with gastroschisis exhibit suboptimal weight gain during the first year. The incidence of adverse developmental outcomes appears to be low.

Peritoneal drainage versus laparotomy for perforated necrotising enterocolitis or spontaneous intestinal perforation: a retrospective cohort study.

AIM: Perforated necrotising enterocolitis (NEC) and spontaneous intestinal perforation (SIP) in preterm infants are associated with high morbidity and mortality. The optimum surgical management during the acute stage remains unclear. The aim of the study was to compare the outcomes of preterm infants (gestational age at birth <30 weeks) with perforated NEC or SIP undergoing primary peritoneal drainage (PD) versus laparotomy. METHODS: This was a retrospective cohort study (January 2004 to February 2010). Initial search of hospital database followed by a review of the medical records was performed to identify eligible infants. Thirty-nine infants were included in the study. Information regarding the baseline characteristics and outcomes of interest were recorded using the medical charts, radiology and laboratory databases. NEC was differentiated from SIP based on radiological, operative and clinical findings retrospectively for this study. RESULTS: Among 39 infants, 19 underwent primary PD while 20 had primary laparotomy. Gestational age and birthweight were similar between the two groups. The composite outcome of mortality before discharge or hospital stay longer than 3 months post-term was significantly worse in PD group (74% vs. 40%, P= 0.038). CONCLUSIONS: Preterm infants undergoing PD for NEC/SIP appeared to have increased risk of adverse outcome compared with laparotomy. More randomised controlled trials are necessary to confirm these findings.

Ward reduction of gastroschisis in a single stage without general anaesthesia may increase the risk of short-term morbidities: results of a retrospective audit.

BACKGROUND: Ward reduction of gastroschisis in a single stage without the need for general inhalational anaesthesia (ward reduction) has been reported by some authors to be effective and safe. We introduced this practice to our neonatal unit 2 years ago. AIM: To compare the short-term outcomes of this new practice with the standard procedure of reduction under general anaesthesia (GA). METHODS: Retrospective case series of all infants with gastroschisis between January 2004 and January 2008. RESULTS: Twenty-seven infants were managed with the traditional approach and 11 infants underwent ward reduction without GA. Infants in the ward reduction group had an increased frequency for all the three major adverse events (ischemic necrosis of bowel: 27.3% vs. 3.7%, odds ratio (OR) 10.72, 95% confidence interval (CI): 0.72, 159.6; need for total parenteral nutrition (TPN) more than 60 days: 18% vs. 3.7%, OR 4.13, 95% CI: 0.28, 61.55; and unplanned return to theatre: 27.3% vs. 7.4%, OR 3.88, 95% CI: 0.44, 34.08), although none of these events reached statistical significance. There were no significant differences between the groups for the outcomes of time to reach full feeds, duration of hospital stay and number of days on antibiotics. CONCLUSIONS: These results raise concerns over the role of ward reduction of gastroschisis in a single sitting without the use of GA. Randomised trials with appropriate design and sample size are needed before embracing this method as a standard practice.