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[Simultaneous proximal and distal revascularization for arterial obstruction of the leg at two sites. Indications,
L Cirafici1, N Chapuis, M Merlini
1Département de chirurgie, Hôpital, La Chaux-de-Fonds.
Insights
In chronic aortoiliac occlusive disease, determining the hemodynamic significance of iliac stenosis is crucial. Direct pressure measurements and papaverine administration during angiography aid in assessing severity and guiding treatment for persistent distal ischemia.
Area of Science:
- Vascular Surgery
- Hemodynamics
- Interventional Cardiology
Context:
- Chronic aortoiliac occlusive disease often involves multilevel obstructions, including femoropopliteal lesions.
- Surgical treatment strategies for these multilevel obstructions can be controversial regarding the timing of distal reconstruction.
- Assessing the hemodynamic significance of iliac stenosis presents challenges, as standard angiography may underestimate severity.
Purpose:
- To discuss the challenges in determining the hemodynamic importance of iliac stenosis in chronic aortoiliac occlusive disease.
- To highlight methods for assessing iliac stenosis severity, including direct pressure measurement and papaverine administration.
- To explore the management of persistent distal ischemia after proximal reconstruction and the potential for steal phenomena.
Summary:
- 50-75% of patients with chronic aortoiliac occlusive disease have associated femoropopliteal lesions.
- Direct femoral pressure measurement during angiography, revealing a brachial-femoral gradient, indicates significant iliac stenosis.
- Intraarterial papaverine administration can further aid in identifying critical stenoses.
Impact:
- Accurate hemodynamic assessment of iliac stenosis is vital for optimal surgical planning in multilevel disease.
- Direct pressure measurements and pharmacologic testing improve the evaluation of iliac segment hemodynamics.
- Understanding factors like high peripheral resistance and steal phenomena is crucial for successful distal revascularization and symptom relief.
Abstract:
In chronic aortoiliac occlusive disease, 50 to 75% of the patients have further femoropopliteal lesions. The surgical treatment of these multilevel obstructions is sometimes controversial: the distal reconstruction can be performed at the time of the proximal one or deferred to a later date. It can be difficult to determine the hemodynamic importance of an iliac stenosis. Angiography is not a perfect predictor of the iliac segment hemodynamics because as it underestimates the severity of aorto-iliac stenoses when single plane views are taken. Direct measurement of the femoral pressure at angiography disclosing a gradient between brachial and femoral arteries indicates significant iliac stenosis. Intraarterial papaverine administration can also be of importance to determine critical stenoses. Despite proximal reconstruction, distal ischemia can persist if peripheral resistance is high. Distal revascularization can relieve ischemic symptoms, providing an adequate outflow bed. However some patients do not benefit from this two-level procedure because of a steal phenomenon in the intermediate vascular bed.