Fig. 9From: B-mode and color Doppler ultrasonography of normal external jugular vein in donkeys (Equus asinus)The midway between the mandibular angle and thoracic inlet was taken as a standard point for ultrasound measurements of the jugular vein (A). For ultrasound probe positions, firstly the probe was placed in a transverse plane (B), then the probe was redirected to be in a longitudinal plane (C). All ultrasonographic measurements were taken in both planesBack to article page