The predictive value of cranial ultrasound and of somatosensory evoked potentials after nerve stimulation for adverse neurological outcome in preterm infants

Thirty-nine preterm infants were studied to compare the predictive value of somatosensory evoked responses (SEPs) following median-nerve and posterior tibial-nerve stimulation with the predictive value of cranial ultrasound. With regard to the SEP, a normal median-nerve response was by no means a guarantee of a normal outcome. A normal posterior tibial-nerve response, however, almost guaranteed a normal outcome, but the test was very time consuming and the number of false positive responses was high (sensitivity. 95.6%, specificity 50%). The presence of parenchymal involvement, either due to a haemorrhage or cystic leukomalacia predicted cerebral palsy with a sensitivity of 95.6% and a specificity of 68.5%. The combination of an abnormal posterior tibial response and the presence of parenchymal brain lesions had the best predictive value with a sensitivity of 91.3% and a specificity of 81.2%. These results show that, although posterior tibial-rferve responses have a better predictive value than median-nerve responses, these values were lower than that of cranial ultrasound. The best prediction was obtained when a combination of posterior-tibial responses and cranial ultrasound was used.     

Childhood gastroesophageal reflux. Neurologic and psychiatric syndromes mimicked

Thirteen infants and children with proved gastroesophageal (GE) reflux had complaints that suggested a CNS disorder. Symptoms began in early infancy in ten cases, but accurate diagnosis and proper treatment were not instituted in three cases until three to five years of age. A CNS basis for their disease was suspected because they exhibited specific signs or because the importance of associated gastrointestinal (GL) and respiratory tract symptoms was not appreciated. The presenting CNS symptoms and signs included dystonia in 11, developmental retardation in ten, dysphagia in nine, seizures in six, and extreme irritability in ten. We believe that the diagnosis of symptom-causing GE reflux is being missed regularly. The effects of proper medical or surgical therapy are often dramatic, and the consequences of missed diagnosis or improper treatment are potentially lethal.