A 1:1 molar complex of haem or haematin and albumin formed after the dissociation of methaemoglobin into haem or haematin and globin in plasma. This complex, which imparts a coffee-brown colour to plasma, occurs in haemolytic and haemorrhagic disorders. Its presence in plasma is used as a test to differentiate between haemorrhagic and oedematous pancreatitis.
American spelling: methemalbumin
(12 Dec 1998)
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