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Reliability of hand-held transcranial doppler with M-mode ultrasound in middle cerebral artery measurement

Show simple item record Muñoz, Paula Gaete, Javier Illanes, Sergio López, Javiera Olavarría, Verónica Reccius, Andrés Brinck, Pablo González, Francisca Cavada, Gabriel Lavados, Pablo Brunser, Alejandro 2018-01-17T12:01:51Z 2018-01-17T12:01:51Z 2017
dc.identifier.citation Journal of Medical Ultrasound, Volume 25, Issue 2, June 2017, Pages 76-81 es_CL
dc.identifier.uri es_CL
dc.description.abstract Purpose: To determine the intra- and interrater agreement of mean flow velocity (MFV) and pulsatility index (PI) measurement in middle cerebral arteries, assessed by transcranial Doppler (TCD) with M-mode. Methods: Masked experienced neurosonologists performed TCD with M-mode using handheld probe in healthy adult volunteers. The Bland–Altman method for concordance and intraclass correlation coefficient were used. Results: Seventy-seven healthy volunteers and seven raters participated (3 on regular TCD shift and 4 off-shift). The intrarater absolute mean difference between measurements was 5.5 cm/s [95% confidence interval (CI), 4.7–6.3] for MVF and 0.073 (95% CI, 0.063–0.083) for PI. The difference between MFV measurements was significantly higher in off-shift raters (p = 0.015). The interrater absolute mean difference between measurements was 6.5 cm/s (95% CI, 5.5–7.5) for MVF and 0.065 (95% CI, 0.059–0.071) for PI. No influence was found for the middle cerebral artery side, volunteer's sex, or age, and there was no significant difference between raters. The intraclass correlation coefficient was 82.2% (95% CI 77.8–85.6) and 72.9% (95% CI 67.4–77.6) for MFV and PI, respectively. Conclusions: There exists good intra- and interrater agreement in MFV and PI measurements using M-mode TCD. These results support the use of this noninvasive tool and are important for clinical and investigational purposes. es_CL
dc.format.extent 6 es_CL
dc.language.iso en_US es_CL
dc.publisher Elsevier es_CL
dc.subject agreement es_CL
dc.subject intraclass correlation coefficient es_CL
dc.subject mean flow velocity es_CL
dc.subject reproducibility es_CL
dc.subject transcranial Doppler es_CL
dc.title Reliability of hand-held transcranial doppler with M-mode ultrasound in middle cerebral artery measurement es_CL
dc.type Artículo es_CL

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