ultrasound dilution technique

ultrasound dilution technique

a technique for measuring blood flow and access recirculation in hemodialysis patients. Ultrasound sensors are attached to the venous and arterial catheters in their normal positions and blood flow is checked. Then they are reversed; the ultrafiltration is turned off, and at a known flow rate, a bolus of saline is released into the venous catheter to dilute the blood. The velocity of the dilution as it passes through the access apparatus is measured by ultrasonography.
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In order to address the needs of this patient group for regular access surveillance, a structured programme of fistula surveillance was introduced to our population of HHD patients in Western Sydney Local Health District using a well-validated ultrasound dilution technique (National Kidney Foundation, 2006).
The ultrasound dilution technique (Transonic[Trademark] HD03, Transonic systemic, Ithaca, NY, USA) is a well-validated means of measuring access flow, and is considered to be the gold standard (Polkinghorne, 2008).
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