Objective. To assess the safety of selective head cooling in birth-asphyxiated term newborn infants while maintaining the rectal temperature at 35.0°C or 34.5°C. Methods. Twenty-six term infants with Apgar ≤6 at 5 minutes or cord/first arterial pH <7.1, plus evidence of encephalopathy, were studied. After parental consent had been obtained, 13 infants received selective head cooling with the rectal temperature maintained at 35.0°C in 6 infants and at 34.5°C in 7 infants. The remaining 13 infants were normothermic. Cooling was achieved by circulating water at 10°C through a cap placed around the head. Rectal, fontanelle, and nasopharyngeal temperatures were monitored. Results. One cooled infant died 2 days after rewarming, and 3 control infants died. Seizures occurred in 9 (69%)of 13 cooled infants and 5 (38%) of 13 control infants. Respiratory support within the first 72 hours of life was required in 10 of 13 infants in both the cooled and control groups. Three cooled infants and 1 control infant received nitric oxide for persistent pulmonary hypertension. During the same interval, 6 of the cooled infants and 4 of the control infants had episodes in which their blood pressure fell to <40 mm Hg; in 2 infants in each group, the lowest blood pressure was below 35 mm Hg. No requirement for volume expansion or increased inotropic support was seen in any infant during stepwise rewarming. All of the cooled infants demonstrated a fall in heart rate during cooling, but the rate was <80/min in only 2 cases and no infant had a rate <70/min. No infant demonstrated an abnormal rhythm or was clinically compromised by the change in heart rate. One infant cooled to a rectal temperature of 34.5°C had a prolonged QT interval of 570 ms associated with a heart rate of 85/min on electrocardiogram aged 34 hours. This returned to normal after rewarming. Platelet counts below 150 × 109/L, hypoglycemia below 2.6 mmol/L, and highest creatinine were not statistically different between cooled and control infants. Positive precooling blood cultures were found in 1 cooled and 1 control infant. The mean cap water input temperature used during cooling was 10 ± 1°C. During active cooling, the mean difference between rectal and nasopharyngeal temperature was 1.4°C in the infants who were not receiving respiratory support, but this gradient could not be measured in those who were receiving respiratory support that involved delivery of warmed gases to the nasopharynx. Conclusions. This study suggests that selective head cooling combined with mild systemic hypothermia of 34.4°C or 35.0°C is a stable, well-tolerated method of reducing cerebral temperature in term newborn infants after perinatal asphyxia.
Most babies are born healthy and grow and develop normally through childhood. There are, however, clearly identifiable high-risk groups of survivors, such as those born preterm or with ill-health, who are destined to have higher than expected rates of health or developmental problems, and for whom more structured and specialised follow-up programs are warranted. This paper presents the results of a two-day workshop held in Melbourne, Australia, to discuss neonatal populations in need of more structured follow-up and why, in addition to how, such a follow-up programme might be structured. Issues discussed included the ages of follow-up, and the personnel and assessment tools that might be required. Challenges for translating results into both clinical practice and research were identified. Further issues covered included information sharing, best practice for families and research gaps. A substantial minority of high-risk children has long-term medical, developmental and psychological adverse outcomes and will consume extensive health and education services as they grow older. Early intervention to prevent adverse outcomes and the effective integration of services once problems are identified may reduce the prevalence and severity of certain outcomes, and will contribute to an efficient and effective use of health resources. The shared long-term goal for families and professionals is to work toward ensuring that high risk children maximise their potential and become productive and valued members of society.
20 November 2003 in Australian and New Zealand Journal of Obstetrics and Gynaecology
OBJECTIVE. Our goal was to evaluate whether head cooling with mild systemic hypothermia for neonatal encephalopathy is associated with greater requirement for volume or inotrope support. PATIENTS AND METHODS. We studied term infants (≥36 weeks) with moderate-to-severe neonatal encephalopathy plus abnormal amplitude integrated electroencephalography, randomly assigned to head cooling for 72 hours starting within 6 hours of birth, with the rectal temperature maintained at 34.5°C ± 0.5°C (n = 112), or conventional care (n = 118). DESIGN. This was a multicenter randomized, controlled study (the CoolCap trial). The primary outcome was the time relationship between mean arterial blood pressure and subsequent administration of inotropes or volume administration. RESULTS. Pooled data from 0 to 76 hours after randomization revealed no difference in mean arterial blood pressure between groups and significantly lower mean heart rate during cooling. The use of inotropes or volume was related to preceding mean arterial blood pressure and not to treatment group in the first 24 hours. In contrast, from 24 to 76 hours, there was no effect of mean arterial blood pressure, but there was an overall reduction in pressure support over time and significantly more frequent pressure support in the cooled group than in controls. CONCLUSIONS. Mild systemic hypothermia did not affect arterial blood pressure or initial treatment with inotropes or volume in infants with moderate-to-severe encephalopathy but was associated with an apparent change in physician behavior, with slower withdrawal of therapy in cooled infants.
6 December 2004 in Australian and New Zealand Journal of Obstetrics and Gynaecology
Listening to the family experience is integral to identifying areas of strength and for improvement in health service delivery around diagnosis and early management of cerebral palsy (CP). Families of children with a diagnosis of CP were invited to complete a purpose-developed electronic survey that included items around the timing of diagnosis, their experiences and satisfaction. It also allowed families to expand on their experiences through free text. Of the 57 families responding, 49% of children functioned at Gross Motor Function Classification System (GMFCS) levels I or II, 8% at GMFCS level III and 23% at GMFCS levels IV or V. 51% of participants were satisfied or very satisfied with the diagnosis experience, 18% were neutral about the experience and 31% were dissatisfied or very dissatisfied. Though the findings of this study may be subject to selection bias, perceived delays in the receipt of diagnosis of CP appeared common with 60% of participants indicating concerns about their child by <6 months of age but only 21% provided with a diagnosis of CP <6 months of age. Approximately 18% of families experienced a delay of more than 12 months. Thirty-four (61%) participants noted a delay between referrals to a service and receipt of service management/therapy. Common themes impacting on families’ experience in the diagnosis and health service delivery journey related to provision of information, and the style of communication, with both direct and ongoing communication styles common for greater family satisfaction. Overall, families desired the diagnosis experience to be informative and timely, with early follow up support and assistance with health sector navigation.