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March 2018

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UVM Flownet <[log in to unmask]>
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From:
Steve Knight <[log in to unmask]>
Date:
Wed, 7 Mar 2018 10:06:55 -0500
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UVM Flownet <[log in to unmask]>
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I reviewed a case of an AVF exam that had very low Volume Flow Velocities
reported (less than 0.06 L/min). The waveforms  were obtained approx 5 cm
distal to the arterial anastomosis in a straight uniform vein section one
month post-op and looked normal in shape. Velocities were not impressively
low. Diameter was about 2.2cm. 4 cardiac cycles were included in the
calculation. The autotrace of peak velocity and mean velocity tracked the
spectral profile without noticeable deviation. The series of beats measured
did include a PVC with a low EDV. Also, the degree of fistula maturity may
be a factor. I would like to hear others who do a lot of Vol Flow
measurements of early dialysis fistulas weigh in here.
Thanks,

Steve K

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