Fig. (10): A stallion with unilateral guttural pouch tympany (a), deflation of the affected side (b) after

decompression of the right non-affected side.

Fig. (11): Three years old donkey with bilateral guttural pouch tympany (a), modified Whitehouse technique with removal of a piece of the median septum between the two pouches (b) and post-

operative wound drainage and decompression of the pouch (c).

Fig. (12): A foal with extended neck, dilated nostrils and regurgitation of the milk (a). The animal showed bilateral

distension of the guttural pouch because of the empyema before drainage (b), and drainage of inspissated pus through

stab-incision at the site of Vyborg's triangle (c).

Fig. (13): Unilateral guttural pouch empyema (a), landmark of surgical approach (b), modified Whitehouse approach in standing position and irrigation with a large syringe through a large Foley catheter (c0, and after complete relief of the signs (d).