Fistula Stenosis Clinical Trial
Official title:
The Use of Intravascular Paclitaxel for the Treatment of Upper-Extremity Arteriovenous Access Fistula Stenosis: A Randomized Study
The objective of this study is to evaluate the safety and effectiveness of the use of
intravascular paclitaxel, in addition to standard therapy, for the treatment of arteriovenous
dialysis access fistula stenosis.
A fistulogram will be performed in standard fashion. The diagnostic component will include
evaluation of the inflow artery, arterial anastomosis and full length of the fistula vein or
graft, plus venous return up to the heart. The location, vessel size, lesion diameter and
percent stenosis for each lesion will be recorded. Enrollment and randomization will occur at
this point.
All patients will then receive standard therapy for their stenosis. This will include
intravenous heparin administered in a standard dose of 70 units/kg. Lesions that respond
poorly to angioplasty (>30% residual stenosis after angioplasty treatment with 2 inflations)
will be stented. Stent selection will be based on clinical setting. Initial stent treatment
will utilize an uncovered nitinol stent. Treatment of in-stent restenosis will include
initial balloon angioplasty, and use of a covered stent (Viabahn, GORE, or Fluency, Bard).
Documentation of location and type of treatment for each lesion treated will be recorded.
Once standard treatment is completed, the operating surgeon will be informed of the patient
randomization: treatment (paclitaxel) or control. For subjects assigned to treatment,
Paclitaxel solution treatment of each lesion encountered from proximal to distal will be
attempted until the 20 mg Paclitaxel dose limit is met.
A TAPAS infusion catheter will be used for all paclitaxel dose administrations. The TAPAS
infusion catheter will be positioned to reduce the presence of branches which permit the loss
of paclitaxel from the treatment zone. After the full outflow vein segment is treated, the
fistulogram is completed in the standard fashion. Prior to removal of the sheath, a final
angiographic study of all areas treated is performed to document patency and lesion
appearance.
For the control group, instead of paclitaxel administration, a sham treatment period of 10
minutes is allowed to elapse followed by the performance of the final completion angiogram.
Any additional lesions identified with this study are then treated appropriately following
standard technique.
All patients will follow the same follow up evaluation schedule.
n/a