Gangrene by Dr. Nimer Khraim DVMS,BVMS, MVSc

Gangrene Gangrene  It’s a death and putrefaction while attached to living body Necrosis  Death of T. with absence of infection

Gangrene  Gangrene result from direct damage to the T. cause by mechanical, physical or chemical agent or by bacteria  Like malignant edema, black leg dis. Strept. and staph. Infection

Gangrene  Some time infiltration of T. with certain liquid may lead to gangrene formation like bile and urine

Clinically gangrene classified to

Dry gangrene  This is mostly due to arterial occlusion  Its like mummification of the T. which it become dry and reduced in volume  Putrefaction is always absent

Clinically gangrene classified to Moist gangrene  This mostly due to venous occlusion  The dis. T. Become disintegrated and liquefied  the lesion contain volatile products of very bad odor

Clinically gangrene classified to  Also moist gangrene contain soluble poison when it is absorbed to the circulation it will cause a fatal toxemia

Clinically gangrene classified to Gas gangrene  Its caused by many types of anaerobic spore forming bacteria  They produce gas from the lyses of dead T. which appear as babble In the infected T.  Like malignant edema and black leg

Clinically gangrene classified to Prognosis of gangrene  Depend in the natural of the lesion which may vary from a simple ulcer to the sloughing of a large mass of a T.  Gangrene is dangerous when the toxemia is severe which may cause death due to 24h

Local symptoms of gangrene

Dry gangrene  The T. become change in appearance and diminish in volume  The skin become shriveled  The hair become dry and erect

Local symptoms of gangrene Moist gangrene  The T. is become purple, greenish, blackish in color and increase in volume with engorged in blood and serum  Pain is severe before death of the affected part

Local symptoms of gangrene  The affected part become cold and insensitive  There is a zone of demarcation between he health and affected T.

Treatment of gangrene

 Removal of the T.  In case of moist gangrene we can make scarification of T. with knife or puncture the gangrenous T.  to permit the escape of toxic liquid and allowing the introduction of antiseptic inside the lesion

Treatment of gangrene  Application of counter-irritant at the periphery of the affected part  This will cause increasing of hyperemia and phagocytosis near the affected T.  which accelerate the separation of the moist or dry gangrene from the health T.

Treatment of gangrene  The best treatment of gangrene is amputation of the part from the body