General clinical features of gangrene
General features include:
- poor or absent arterial pulses, venous return, capillary response to pressure - indicated by return of colour - sensation, warmth, and function
- characteristic colour changes - pale, grey, mottled, blue then finally, dark brown, greenish black or black. The final colouration is due to the disintegration of haemoglobin and formation of iron sulphide.
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