RIU 436 Lecture Notes - Lecture 25: Atherectomy, Kidney Failure, Calcification
14 Jul 2020
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Success rate for pta within the first year: 20-40% Incidence of failure is highest within the first 6 months. Figure 12-1, peripheral angioplasty surveillance testing protocol and study interpretation criteria. Failure of intervention or progression of disease. Perform studies prn and based on symptoms and clinical assessment. Any new or unresolved symptoms since intervention: In a claudicant, abi should improve to normal (> . 90) In critical limb ischemia patients, toe pressure should have increased to predict healing (at least 30-40 mmhg) All patients should show an abi improvement of at least > Duplex scan may not be needed if abi is normal. Monitoring for: failure of intervention or progression of disease. Figure 12-2 schematic depicting sites of duplex scanning including the cfa, angioplasty site, and assessment of distal tibial artery hemodynamics. Exam should begin at common femoral artery (cfa): If cfa waveform is monophasic, damped compared to contralateral limb, or has an abnormal acceleration time, iliac system should be assessed.
