• Guillaume Dupont, Laetitia Burnol, Richard Jospe, Terrana Raphael, Christian Auboyer, Serge Molliex, Laurent Gergelé, and Jérôme Morel.
• Department of Anesthesiology and Critical Care, University Hospital of Saint Etienne, Saint-Étienne Cedex, France.
• J Neurosurg Anesthesiol. 2016 Apr 1; 28 (2): 159-63.

BackgroundTranscranial color duplex ultrasound (TCCD) is becoming an important tool for cerebral monitoring of brain-injured patients. To date, TCCD reproducibility has been studied in healthy volunteers or patients with subarachnoid hemorrhage and its efficiency in many brain injuries has not been proved. Our aim was to evaluate TCCD interobserver agreement in different brain injuries.Patients And MethodsWe performed a prospective monocentric trial conducted from January 2014 to September 2014 in intensive care unit (ICU) of Saint-Etienne university teaching hospital, France.Brain-damaged patients admitted in ICU were included, excluding those with decompressive craniectomy. Two randomized operators among the ICU medical staff consecutively performed measurements of cerebral blood flow velocities with TCCD.ResultsOne hundred measurements were obtained from 42 patients. Hemodynamic and end-tidal CO2 pressure were similar between both measurement set. The results obtained with the Bland-Altman method showed bias at 0.52 (95% confidence interval [CI], -4.19 to 3.16), 0.53 (95% CI, -1.86 to 2.92), and 0.002 (95% CI, -0.06 to 0.06) for mean velocity, diastolic velocity, and pulsatility index, respectively. The limits of agreement were (-32.4; 31.4), (-20.4; 21.4), (-0.5; 0.5) for mean velocity, diastolic velocity, and pulsatility index, respectively. The Passing and Bablok regression have shown a quasilinear relationship between measurements.ConclusionsWe reported the reliability of TCCD interobserver agreement in brain-damaged patients.

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