SALIVARY FISTULA. 



333 



(1) Ligation of the salivary duct above the fistula. The duct is 

 isolated between the fistula and the gland, and tied with a stout 

 thread. A strong ligature is essential. The animal should fast for 

 the next twenty-four to forty-eight hours, and then receive only 

 fluid nourishment. Soon afterwards swelling of the gland appears 

 (tumour salivalis), and is followed by gradual atrophy. Not in- 

 frequently, however, the ligature cuts, to prevent which a thick 



Fig. 320. — Parotid gland and Stenson's duct. (Semi-schematic.) 

 A, Tendon of the stylo-maxillaris ; B, parotid gland ; C, Stenson's duct. The 

 lines D and E should be prolonged. They are intended to point to the facial 

 vein and artery — the latter .indicated by the strong cross-shading, the vein 

 being next it towards the left. 



ligature should be chosen. Bassi observed great dilatation of Stenson's 

 duct after ligation ; he applied a second ligature above the swelling, 

 but a fistula of the salivary duct resulted. He then injected 6 drachms 

 of ethyl alcohol into the gland on two occasions, at intervals of 

 two days. The function of the gland was destroyed and the fistula 

 healed. 



(2) Transverse section of the duct, after being tried by Reynal 

 and F. Giinther, was again recommended by Gerlach, while Siedam- 

 grotzky and Harms have also tested it, though Harms has questioned 

 its usefulness. They found that the end of the duct became closed 



