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Dialysis needle hemodynamics in arterio-venous fistulae: a technical report
Vladimir Tuka1, Edwin Wijnen, Frank M van der Sande
1Third Department of Internal Medicine, General University Hospital, Charles University, Prague 2, 128 08, Czech Republic. Vladimir.Tuka@vfn.cz
Background:
Vascular access is the lifeline for end-stage renal disease patients needing hemodialysis treatment. For dialysis treatment two needles are placed into the vascular access. Few studies on needle hemodynamics have been published.
Methods:
We investigated needle hemodynamics by means of Doppler ultrasonography, both in B-mode and in pulsed Doppler mode.
Results:
Direct visualization of the needles, turbulence around the arterial needle and blood flow jet from the venous needle are presented.
Conclusions:
Ultrasound investigation of the hemodynamics of the dialysis needles is feasible. The extreme blood flow jet through the arterial needle was directed in all patients to the anterior vessel wall.
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