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Updated: May 14, 2026
Dissection of the Auditory Bulla in Postnatal Mice: Isolation of the Middle Ear Bones and Histological Analysis
Published on: January 4, 2017
Ultrasound evaluation of tympanic bulla in calves
Véronique Bernier Gosselin1, Marie Babkine, Sylvain Nichols
1Centre Hospitalier Universitaire Vétérinaire, Université de Montréal, Saint-Hyacinthe, C.P. 5000, Québec J2S 7C6.
Abstract:
An ultrasonographic approach for the tympanic bulla in calves is described. Ultrasound evaluation was performed through a lateral approach on 7 fetuses, 2 newborn calves, and 4 living calves of various ages. The probe was positioned caudal to the vertical mandibular ramus, ventral to the base of the ear. Three different positions of the probe were used. The tympanic bulla and adjacent structures were successfully identified and their ultrasonographic appearance described. Fluid within the tympanic bulla was visualized in 12 bullae in the cadavers and in 6 bullae in live calves. Ultrasound imaging has been shown to be useful but its diagnostic value remains to be studied in clinical cases of otitis media in calves.
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