title: Ultrasonographic examination of the pharynx and larynx of the normal dog.
abstract: Real-time ultrasonographic examination of the canine larynx was performed in 12 normal dogs using a 7.5-mHz mechanical sector scanner combined with a stand-off. A variety of breeds and ages were examined. All examinations were performed in nonsedated, conscious animals. Transverse scans were found to provide the most reliable and interpretable images. Identification of laryngeal structures included the epiglottis, laryngeal and cricoid cartilages, and the vocal cords. In conscious animals, abduction and adduction of the vocal cords associated with respiration could be identified if the animal was made to pant during the examination. Movement of the vocal cords could also be quantified by pulse-wave Doppler recording. In all animals, recordings were made during inspiration only, with muscular vibration at a rate less than 0.1 m/s.
authors.affiliation: The Queen's Veterinary School Hospital, Department of Clinical Veterinary Medicine, University of Cambridge.
authors.forename: J P
authors.initials: JP
authors.lastname: Bray
authors.forename: V J
authors.initials: VJ
authors.lastname: Lipscombe
authors.forename: R A
authors.initials: RA
authors.lastname: White
authors.forename: H
authors.initials: H
authors.lastname: Rudorf
mesh_terms: D000818:Animals; D003413:Cricoid Cartilage / Q000000981:diagnostic imaging; D004285:Dogs / Q000033:anatomy & histology*; D004825:Epiglottis / Q000000981:diagnostic imaging; D001239:Inhalation / Q000502:physiology; D007817:Laryngeal Cartilages / Q000000981:diagnostic imaging; D007821:Laryngeal Muscles / Q000000981:diagnostic imaging / Q000502:physiology; D007830:Larynx / Q000000981:diagnostic imaging*; D009068:Movement; D010614:Pharynx / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results; D012119:Respiration; D014463:Ultrasonography / Q000662:veterinary; D018617:Ultrasonography, Doppler, Pulsed / Q000662:veterinary; D014732:Vibration; D014827:Vocal Cords / Q000000981:diagnostic imaging / Q000502:physiology