Prediction of Fetal Biliary Atresia Based on Second and Third-Trimester Ultrasound Characteristics.

Objective:  To explore the diagnostic performance of prenatal ultrasound in the prediction of biliary atresia (BA).

Methods:  We prospectively collected cases of suspected biliary abnormalities in the 2 trimester of pregnancy and performed a series (at least 3) of prenatal ultrasound examinations in the 2 and 3 trimester. The presence of the gallbladder was examined each time, and its size and shape were assessed if the gallbladder was visible.

Acoustic modulation of electrically evoked otoacoustic emission in chickens.

Electrically evoked otoacoustic emissions (EEOAEs) can be elicited from the chicken inner ear. Since lesion studies implicate hair cells are the source of EEOAEs, we hypothesized that acoustic stimuli would modulate EEOAE amplitude at cochlear locations where the acoustic and electrical stimuli overlap. To assess this interaction, EEOAEs were measured as the frequency and amplitude of the acoustic stimuli were varied.