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An arteriovenous fistula (AVF) is created by direct anastomosis between an artery and adjacent vein which leads to flow of blood from artery directly into the vein. A well functioning and patent AVF is essential for optimum delivery of hemodialysis and hence it is important to assess the AVF for any signs of loss of patency (stenosis/thrombosis) on a regular basis. Methods of AVF monitoring include...
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