GANGRENE 81 



moutli of the fistula into a fresh, wound and obliterating the 

 opening by stitching it up. When this fails in secretory- 

 fistula, removal or destruction of the gland becomes neces- 

 sary. 



GANGRENE. 



Define gangrene. 



By gangrene, necrosis or mortification, is understood a 

 local death of tissue. 



How is gangrene classified f 



Into moist and dry gangrene, aseptic and septic gan- 

 grene. 



What is dry gangrene ? 



A process of mummification. It represents a condition 

 resulting from loss of water of the affected tissues. 



What is moist gangrene ? 



That form of gangrene where the necrosed tissues under- 

 go softening or pulpification, as evaporation of the watery 

 constituents of the tissue cannot easily take place. 



What is putrid gangrene ? 



Necrosis plus bacteria of decomposition. 



What is ichorous or phagedenic gangrene ? 

 It is a putrid, rapidly spreading gangrene. 



What is emphysematous gangrene ? 



A gangrene due to a mixed infection with gas producing 

 bacteria. 



