Multimodal Regional Brain Monitoring of Tissue Ischemia in Severe Cerebral Venous Sinus Thrombosis.

Neurocritical Care
Alexandre SimoninMauro Oddo

Abstract

Comatose critically ill patients with severe diffuse cerebral venous thrombosis (CVT) are at high risk of secondary hypoxic/ischemic insults, which may considerably worsen neurological recovery. Multimodal brain monitoring (MBM) may therefore improve patient care in this setting, yet no data are available in the literature. We report two patients with coma following severe diffuse CVT who underwent emergent invasive MBM with intracranial pressure (ICP), brain tissue oximetry (PbtO2), and cerebral microdialysis (CMD). Therapy of CVT consisted of intravenous unfractionated heparin (UFH), followed by endovascular mechanical thrombectomy (EMT). EMT efficacy was assessed continuously at the bedside using MBM. Despite effective therapeutic UFH (aPTT two times baseline levels in the two subjects), average CMD levels of lactate and glucose in the 6 h prior to EMT displayed evidence of regional brain ischemia. The EMT procedure was associated with a rapid (within 6 h) improvement in both CMD lactate (6.42 ± 0.61 4.89 ± 0.55 mmol/L, p = 0.02) and glucose (0.49 ± 0.17 vs. 0.96 ± 0.32 mmol/L, p = 0.0005). EMT was also associated with a significant increase in PbtO2 (22.9 ± 7.5 vs. 30.1 ± 3.6 mmHg, p = 0.0003) and a decrease in CMD glutamat...Continue Reading

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