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Metallic Stents Deployed in Synthetic Arteriovenous Hemodialysis Grafts

George X. Zaleski1, Brian Funaki2, Jordan Rosenblum2, Jennifer Theoharis2 and Jeff Leef2

1 Racine Radiologist Group, 3803 Spring St., Rm. 208, Racine, WI 53405.
2 Department of Radiology, MC 2026, The University of Chicago Hospitals, 5841 S. Maryland, Chicago, IL 60637.



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  		Fig. 1. —Graph shows percentage of primary and secondary graft patencies at various intervals of months after stent placement. {diamondsuit} = primary patency. {blacksquare} = secondary patency.

 


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  		Fig. 2. —Graph shows length of cumulative graft function in individual study patients after surgical treatment, conventional radiologic treatment, and intragraft stent placement. Period of graft function achieved with surgical treatment is represented by gray bars, period of function achieved with conventional radiologic treatment is represented by black bars, and period of function achieved with intragraft stent placement is represented by white bars.

 


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  		Fig. 3. —41-year-old man with intragraft stent. Digital radiograph shows minimal distortion of stent placed 3 months earlier into venous limb of femoral loop graft.

 


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  		Fig. 4. —58-year-old man with intragraft stent placed 5 months earlier. Digital radiograph reveals foreshortening deformity in dilated portion of graft. Note multiple minimally displaced stent fractures.

 


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  		Fig. 5. —67-year-old woman with intragraft stent placed 8 months earlier. Digital radiograph shows fraying of edge of stent likely caused by repeated needle punctures. Note second venous intragraft stent overlying the ulnar cortex with minimal deformity.

 


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  		Fig. 6. —81-year-old woman with intragraft stent inserted 14 months earlier. Digital radiograph shows severe stent deformity. Graft occluded soon after this examination.

 


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  		Fig. 7. —56-year-old man with intragraft stent inserted 28 months earlier. Digital radiograph shows multiple wire fractures (arrows). Distortion is less severe than that seen in patient in Figure 6, with less narrowing of intravascular lumen.

 

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