Abstract: To investigate the effect f HD02 hemodialysis monitor in monitoring vascular access function, Method A total of 148 hemodialysis patients treated in Hemodialysis Center of West China Hospital were included in this study. Vascular access functions including re-circulation rate, fistula blood flow rate, cardiac output and cardiac indexmwere measured using HD02 monitor during hemodialysis sessions. Malfunction of HD02 monitor were also analyzed. Result: In the 57patients with cuff catheter, re-circulation rate >5% was found in 12 (21.1%) patients in the ovservation period. In 91 patients with fistula, 25% re-circulation was found in one patient, fistula blood flow rate  <500ml/min in 11 (12.09%) patients including 4 (36.6%) diabetec patients, and instantly re-corrected re-circulation in 1 patient. Monitor malfunction happened 7 times, including 4 probe disorders, 1 power cord disorder, 1 computer disorder and 1 printer disorder. Conclusion: Ultrasonic dilute method is an easy, safe, non-invasive, fast and reliable method for vascular access measurement. Regular manipulation  should be applied to avoid incorrect results.

Key words: hemodialysis, vascular access, ultrasonic dilute, HD02 hemodialysis monitor