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Luminal changes in downsteam arteries after percutaneous interventions in iliac arteries: implications for balloon or
1Department of Radiology, University of Bonn, Germany.
Insights
Iliac artery interventions can cause significant downstream luminal widening. Therefore, pre-intervention measurements of the ipsilateral downstream artery are unreliable for determining appropriate stent or balloon size.
Area of Science:
- Vascular Surgery
- Interventional Cardiology
- Radiology
Background:
- Iliac artery disease often requires percutaneous intervention.
- Accurate sizing of endovascular devices is crucial for successful outcomes.
- Downstream iliac artery diameter changes post-intervention are not well-characterized.
Purpose of the Study:
- To evaluate changes in downstream iliac artery diameter after percutaneous interventions.
- To assess the impact of these changes on stent and balloon sizing decisions.
Main Methods:
- Retrospective review of angiographic studies for 31 patients with iliac artery occlusion or stenosis.
- Interventions included stent implantation (26 patients) or balloon angioplasty (5 patients).
- Comparison of ipsilateral downstream artery diameter to the contralateral artery before and after intervention.
Main Results:
- Pre-intervention, 26/31 patients had a reduced ipsilateral downstream artery diameter (mean 24%) compared to the contralateral side.
- This difference was statistically significant for external and common iliac arteries.
- Post-intervention, 17/26 patients showed complete reversal of this difference, with luminal widening in 5 patients.
Conclusions:
- Downstream iliac arteries frequently exhibit significant luminal widening after intervention.
- Pre-intervention diameter of the ipsilateral downstream artery is an unreliable predictor for device sizing.
- Accurate stent and balloon sizing requires consideration of post-intervention vessel response.
Purpose:
To evaluate changes in the diameter of downstream iliac arteries after percutaneous interventions, which may be important for stent or balloon size determination.
Patients And Methods:
Angiographic studies were reviewed respectively for 31 patients in whom a unilateral common iliac artery occlusion (n = 10) or a high-grade stenosis (> 75%; n = 21) was treated with stent implantation (26 patients) or balloon angioplasty (five patients).
Results:
Before intervention, the ipsilateral downstream arteries showed a luminal reduction in 26 of 31 patients (mean 24% +/- 11.0; range, 6%-64%) compared with the opposite artery. This side-to-side difference was statistically significant for the external iliac artery (P = .000007) and for the common iliac artery distal to the obstruction (P = .017). In 17 of 26 patients, the side-to-side difference of the downstream external iliac artery was fully reversible immediately after intervention. In five patients, a luminal widening was noted. No change was seen in only four patients.
Conclusion:
Because downstream arteries often show a marked luminal widening after intervention, determination of balloon or stent size cannot be based solely on the diameter of downstream ("normal") ipsilateral artery before intervention.