Tools for the diagnosis of equine respiratory disorders Marie-France Roy, DMV, Jean-Pierre Lavoie, DMV Veterinary Clinics: Equine Practice Volume 19, Issue 1, Pages 1-17 (April 2003) DOI: 10.1016/S0749-0739(02)00063-9
Fig. 1 Preferred site for entering the frontal sinus. This site also gives access to the caudal maxillary sinus through the frontomaxillary opening. Distance a: 0.5 cm caudal to a line joining both medial canthi. Distance b: 60% of the distance, in a lateral direction, from midline to the medial canthus. Veterinary Clinics: Equine Practice 2003 19, 1-17DOI: (10.1016/S0749-0739(02)00063-9)
Fig. 2 Preferred site for entering the caudal maxillary sinuses, which allows visualization of the sphenopalatine sinus. Distance a: 2 cm rostral to the medial canthus. Distance b: 2 cm ventral to the medial canthus. Veterinary Clinics: Equine Practice 2003 19, 1-17DOI: (10.1016/S0749-0739(02)00063-9)