Phase: ongoing

Drug eluting balloon venoplasty in arterio-­venous fistula stenosis Background and study aims Chronic kidney disease (CKD) is a long-term condition where the kidneys do not work properly. In a healthy person, the kidneys are responsible for filtering out the waste products and excess water in the blood, and converting them into urine. In patients suffering from CKD, the kidneys are unable to do this, and so the body is unable to get rid of the waste products building up in the blood. Haemodialysis is one of the most common treatments for CKD patients, and involves diverting the blood into an external machine so that it can be “cleaned”, before being returned to the body. It requires direct access to the circulatory system (blood stream) and the best option for this is a by creating an arterio-venous fistula (AVF), which is made by surgically joining an artery and a vein in the arm. AVFs have a limited lifespan, and over time can become narrowed (stenosed) or blocked (thrombosed). The fistula can be used for haemodialysis again if it is “re-opened”. This is done by inflating a small balloon inside the fistula to flatten any blockages against the artery wall (fistuloplasty). In many cases however, the fistula re-narrows and becomes blocked again (restenosis). New techniques have been developed where the balloon used in the fistuloplasty is coated in a drug, such as Paclitaxel (drug-eluting balloon, DEB). This drug slows the growth of new smooth muscle cells in the vessel wall that may lead to re-narrowing (restenosis). The aim of this study is to find out whether a DEB is more effective than standard balloons (with no drug coating) at slowing down and preventing restenosis. Who can participate? Adults who have a narrowed AVF, which has been in use for at least 1 month. What does the study involve? Participants are randomly allocated to one of two groups. Participants in the first group receive the standard fistuloplasty procedure, in which a plain balloon is inflated until the fistula becomes wide enough to become usable. Participants in the second group receive the standard fistuloplasty procedure, in which a balloon coated in a drug called paclitaxel is used. Participants attend follow-up appointments 3, 6 and 12 months after their operation so that the openness (patency) of the fistula can be monitored. What are the possible benefits and risks of participating? Not provided at time of registration Where is the study run from? Queen Elizabeth Hospital, Birmingham (UK) When is the study starting and how long is it expected to run for? January 2016 to October 2018 Who is funding the study? Boston Scientific Corporation (USA) Who is the main contact? Mrs Nicola Anderson

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