Ultrasound evaluation of tympanic bulla in calves.
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.
Centre Hospitalier Universitaire Vétérinaire, Université de Montréal, Saint-Hyacinthe, C.P. 5000, Québec J2S 7C6.
Véronique Bernier
VB
Gosselin
Marie
M
Babkine
Sylvain
S
Nichols
André
A
Desrochers
D000158:Acoustic Impedance Tests / Q000379:methods / Q000662:veterinary*; D000818:Animals; D000831:Animals, Newborn; D002102:Cadaver; D002417:Cattle; D002418:Cattle Diseases / Q000000981:diagnostic imaging*; D004427:Ear Diseases / Q000000981:diagnostic imaging / Q000662:veterinary*; D004432:Ear, Middle / Q000000981:diagnostic imaging*; D005260:Female; D008297:Male; D010033:Otitis Media / Q000000981:diagnostic imaging / Q000662:veterinary; D018608:Ultrasonography, Doppler / Q000379:methods / Q000662:veterinary*; D016216:Ultrasonography, Prenatal / Q000662:veterinary