{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T05:28:59Z","timestamp":1790918939745,"version":"4.1.0"},"reference-count":21,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2007,2,1]],"date-time":"2007-02-01T00:00:00Z","timestamp":1170288000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Clinical Ultrasound"],"published-print":{"date-parts":[[2007,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose.<\/jats:title><jats:p>To assess via Doppler sonography the hemodynamic changes in the cephalic vein after creation of an arteriovenous fistula, and to compare radiocephalic and brachiocephalic fistulas.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods.<\/jats:title><jats:p>Thirty\u2010three hemodialysis patients and 54 controls were enrolled in the study. The cephalic vein was examined with a 7.5\u2010MHz linear\u2010array transducer. Doppler waveform parameters (resistance index, pulsatility index), time\u2010averaged maximum flow velocity (TAV), peak systolic velocity (PSV), end\u2010diastolic velocity (EDV), and the cross\u2010sectional area of the vessel (A) were measured. Cephalic vein flow volume (CVFV) was calculated as TAV \u00d7 A.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results.<\/jats:title><jats:p>CVFV, PSV, EDV, A, RI, and PI were 45.5, 7.2, 6.7, 7.7, 1.2, and 1.32 times higher, respectively, in the cephalic vein of hemodialysis patients compared with controls. Both CVFV and A were higher in brachiocephalic patients compared with radiocephalic patients (1,983 \u00b1 1,199 versus 870 \u00b1 322 ml\/min [<jats:italic>p<\/jats:italic> &lt; 0.05] and 50.3 \u00b1 38.9 versus 21.0 \u00b1 7.8 mm<jats:sup>2<\/jats:sup> [<jats:italic>p<\/jats:italic> &lt; 0.05], respectively).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion.<\/jats:title><jats:p>The increase in cross\u2010sectional area and flow volume of the cephalic vein is larger in patients with brachiocephalic fistulas than in those with radiocephalic fistulas; however, flow velocities and waveform parameters are not different. \u00a9 2007 Wiley Periodicals, Inc. 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