Haem Derivatives in the Cerebrospinal Fluid after Intracranial Haemorrhage

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Abstract
During the first 5 days after an intracranial haemorrhage, the red blood cells slowly haemolyse. Most of the oxyhaemoglobin, released in the cerebrospinal fluid, is transformed into bilirubin by an enzyme-dependent process. After 5 days, the haemolysis increases without a corresponding enhancement in the formation of bilirubin. Consequently, the oxyhaemoglobin concentration also increases. A spontaneous oxidation of the haem groups follows and after about 10 days the proportions of oxy- and methaemoglobin are about the same. This process occurs independently of the cause of the haemorrhage.

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