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Cryosection on dorsal plane. (a) FAB technique: notice the ink at the axillary space. (b) FAD technique: notice the ink within the thorax. FAB technique = the forelimb to be blocked is abducted 90º; FAD technique = both forelimbs are adducted; Cr = cranial; Cd = caudal; AA = axillary artery; AV = axillary vein; 1 = first rib; L = lung; T = trachea
