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michigan hypertension core curriculum - State of Michigan

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Table 6. Clinical evaluation <strong>of</strong> renal artery perfusion and renal ischemia<br />

Noninvasive assessment <strong>of</strong> renal blood flow<br />

125 I-Iothalamate GFR (Total GFR)<br />

99M Tc-DTPA (Split renal function and single-kidney GFR)<br />

Invasive assessment <strong>of</strong> significance <strong>of</strong> RAS<br />

Percent diameter stenosis by visual estimates or quantitative angiography<br />

Translesional pressure gradient (TLG)<br />

Fractional flow reserve (FFR)<br />

Intravascular ultrasound (IVUS)<br />

Renal frame counts (RFC)<br />

Renal blush s<strong>core</strong> (RBS)<br />

Abbreviations: GFR= glomerular filtration rate, RAS=renal artery stenosis, 99M Tc-DTPA= technetium-<br />

labeled pentetic acid.<br />

Table 7. Technical considerations to avoid renal injury during renal stenting<br />

Avoid injury to renal artery ostium<br />

Minimize catheter manipulation<br />

No-touch technique (Figure 8)<br />

Catheter-in-catheter technique (Figure 8)<br />

Minimize contrast nephropathy<br />

Hydration<br />

Limit contrast volume<br />

Prevent distal embolization<br />

Distal embolic protection devices (?)<br />

Glycoprotein IIb / IIIa inhibitors (?)<br />

130 Hypertension Core Curriculum

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