Vascular Guidebook 1

8.2 Suboptimal TTFM in Peripheral Bypass Suboptimal flows may indicate different problems. Poor run-off (resistance) distally to the graft iS one major challenge, Issues with the graft itself or technical imperfections in the anastomosis may lead to disorganized TTFM curves that have Iow flow and often high spikes. TTFM of a cross-over pedal graft. The flow was acceptable. but the flow curve was not completely repetitive so we recommend to measure again and save when the pattern is repetitive. TTFM of Popliteal Artery during Fern-pop procedure, Flow evaluation before bypass showed low flow and signs of flow obstruction. The flow value was negative because Of the probe orientation. To get access to the measurement site it sometirnes is technically easier to use the opposite orientation of the probe. This will not aftect the measurement reading. TTFPv1 of a femoral artery that was occluded. The high spikes indicate a flow-occluding narrowing in the vessel, There was also negative flow during the diastole, Further investigation with ultrasound would be advisable here.