Ultrasound-induced contraction of the carotid artery in vitro.

Ultrasound is known to produce a range of nonlethal responses in cells and tissues. Frequencies in the kilohertz ultrasound range have been shown to produce relaxation in large arteries. The present work explores the effects of insonation at MHz frequencies, representative of those used diagnostically and therapeutically, in an in vitro preparation of the carotid artery.

Reproducibility of swallowing over time in healthy elderly adults.

The purpose of this study was to evaluate the reproducibility of aspects of swallowing assessed over time by the Exeter Dysphagia Assessment Technique. Fourteen healthy elderly adults were assessed during the morning on four consecutive days. During day 1, the assessment was repeated ten times.