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  • Title: [The prognostic value of the lactate concentration and lactate/pyruvate ratio in cerebrospinal fluid following acute cerebral circulatory disorders].
    Author: Raudam EI, Rivis EK.
    Journal: Vopr Neirokhir; 1976; (2):32-7. PubMed ID: 936557.
    Abstract:
    The study was conducted in 80 patients with ischaemic and 29 with haemorrhagic cerebral stroke. Lactate, pyruvate, the lactate/pyruvate ratio and glucose were determined in the arterial blood and lumbar CSF. A high prognostic value of the CSF lactate content was found in cases of ischaemic stroke. According to the data obtained, an elevation of the CSF lactate concentration above 4.0 mEq/l should be considered life-threatening. Haemorrhagic stroked was found to be accompanied by a reduced CSF glucose level and an elevated lactate content, as well as by a significant proportional elevation of the lactate and red blood cells count in the CSF. The conducted calculations demonstrated that 1/4 to 1/3 of the CSF lactate is formed at the expense of the glycolytic metabolism in the CSF erythrocytes. This constitutes the main reason of the discordance between the CSF lactate content in haemorrhagic stroke and the routine criteria of prognosis in ischaemic stroke. The lactate/pyruvate ratio in the CSF is of no prognostic importance in both forms of cerebral stroke.
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