Figure 7 - uploaded by Robert Scissons
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(A) Severely stenotic vein graft stenosis (arrow). (B) Doppler spectral analysis of depicted vein graft stenosis.
Source publication
Lower extremity duplex graft surveillance has emerged as the technique of choice for evaluating infrainguinal bypass grafts. This method combines noninvasive safety and patient comfort with the added benefits of detailed morphologic and hemodynamic information. A variety of graft conduits are used to bypass lower extremity stenoses and occlusions i...
Context in source publication
Context 1
... should include the proximal and distal anastomosis sites; the adjacent na- tive inflow and outflow vessels; and the proximal, middle, and distal segments of the body of the bypass graft. Any areas of flow disturbance or structural ab- normalities (e.g., aneurysmal dilation, pseudoaneu- rysm, arteriovenous fistula, residual valve leaflets [ Figure 5], dilatation at valvotomy sites, graft entrap- ment, perigraft fluid collections [ Figure 6], atheroscle- rotic lesions, or stenoses [ Figure 7A and 7B]) should be interrogated and referenced for comparison on follow- up evaluations. Although the use of volumetric flow rate measurements remains controversial, these data have a significant practical advantage over velocity information, because blood flow remains relatively constant throughout the graft and is independent of variations in graft diameter. ...
