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  • Title: Circulatory and Respiratory Parameters during Acute Endovascular Stroke Therapy in Conscious Sedation or General Anesthesia.
    Author: Mundiyanapurath S, Schönenberger S, Rosales ML, Carrilho Romeiro AM, Möhlenbruch M, Bendszus M, Hacke W, Bösel J.
    Journal: J Stroke Cerebrovasc Dis; 2015 Jun; 24(6):1244-9. PubMed ID: 25906939.
    Abstract:
    BACKGROUND: Whether patients suffering from acute ischemic stroke and undergoing endovascular recanalization should be treated under general anesthesia (GA) or conscious sedation (CS) is a matter of debate. According to retrospective studies, GA appears to be associated with a worse outcome than CS. The underlying mechanisms are unknown, but hypotension and hypocapnia during GA have been suggested. There are no prospective data on this question. METHODS: We prospectively analyzed consecutive patients who were treated with endovascular recanalization from 11, 2013 to 03, 2014 regarding blood pressure, end-tidal carbon dioxide (etCO2), cerebral oximetry (by near-infrared spectroscopy), ventilation parameters, response to commands, basic parameters (age, gender, percentage of posterior circulation stroke, National Institutes of Health Stroke Scale score [NIHSSS] on admission, NIHSSS at discharge, rate of successful recanalization [thrombolysis in cerebral infarction scale >2a], duration of intervention, symptom-to-recanalization time, and door-to-needle time), and medication used. RESULTS: Forty-four patients (29 under GA and 15 in CS) were included. Significant differences between the groups (GA versus CS) were found in the median dose of norepinephrine (.4 mg/hour versus .1 mg/hour, P = .003), mean systolic blood pressure (139.67 mm Hg versus 155.00 mm Hg, P = .003), mean duration of relative hypotension (systolic blood pressure <140 mm Hg; 42.75 versus 15 minutes, P = .004), and mean etCO2 values (37.29 mm Hg versus 27.33 mm Hg, P = .004). CONCLUSIONS: In this small prospective study, patients under CS required less vasopressor medication and had a higher mean blood pressure than those under GA, but they also showed signs of hyperventilation. The impact of these physiological differences on outcome needs to be studied in randomized trials.
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