Neonatal core body temperature extended investigation

This observational study is looking at how to best measure the body temperature of seriously ill newborn babies. Nurses and doctors currently use several different spots on the body to measure temperature (such as the rectum and esophagus), but researchers want to find out if some spots are quicker to detect changes than others. Understanding this could help medical staff respond more quickly to dangerous temperature changes in critically ill newborns. You may be eligible if: - You are a critically ill newborn baby - You were born at 35 weeks of pregnancy or later - You are less than 4 weeks old - You have hypoxic ischemic encephalopathy (a brain injury caused by lack of oxygen) or another critical illness requiring breathing support You may NOT be eligible if: - You have rectal atresia (a blockage or absence of the rectum/anus) - You have esophageal atresia (a blockage or gap in the esophagus) - You were born before 35 weeks of pregnancy Talk to your doctor about whether this trial might be right for you.