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Transcutaneous Flow Measurements in In-Situ Bypasses: An Assessment of Duplex Scanning

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

Benjamin B. Chang

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

Ahmed A. Shandall

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

Kathleen M. Fitzgerald

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

Dhiraj M. Shah

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

Robert P. Leather

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

John D. Corson

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

Allastair M. Karmody

Departments of Surgery, Albany Medical College and Veterans Administration Medical Center, Albany, NY

Measurement of laminar flow using an ultrasound scanner was shown to have a high degree of correlation with quantified timed flows (r = 0.98, p .001). Sixty-one in-situ bypasses had flow assessed both proximally and dis tally. Mean fistula flow (proximal-distal flows) for time periods 1-8 weeks, 3 to 8, and 9+ months were 108, 85, and 16mls respectively. Distal bypass flow remained constant despite a significant decrease in fistula flow between the later time periods (p .001) (unpaired t-test). There was no evidence from the study that proximal flow through fistulas of varying resistances adversely affected the distal bypass flow.

Angiology, Vol. 37, No. 3, 143-148 (1986)
DOI: 10.1177/000331978603700301


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