1,721,021 research outputs found
Aortic neck evolution after endovascular repair with TriVascular Ovation stent graft
No full textOBJECTIVE:
Aortic neck dilation has been reported after endovascular aneurysm repair (EVAR) with self-expanding devices. With a core laboratory analysis of morphologic changes, this study evaluated midterm results of aortic neck evolution after EVAR by endograft with no chronic outward force.
METHODS:
This was a multicenter registry of all patients undergoing EVAR with the Ovation endograft (TriVascular, Santa Rosa, Calif). Inclusion criteria were at least 24 months of follow-up. Standard computed tomography (CT) scans were reviewed centrally using a dedicated software with multiplanar and volume reconstructions. Proximal aortic neck was segmented into zone A (suprarenal aorta/fixation area), zone B (infrarenal aorta, from lowest renal artery to the first polymer-filled ring), and zone C (infrarenal aorta, at level of the first polymer-filled ring/sealing zone). Images were analyzed for neck enlargement (≥2 mm), graft migration (≥3 mm), endoleak, barb detachment, neck bulging, and patency of the celiac trunk and superior mesenteric and renal arteries.
RESULTS:
Inclusion criteria were met in 161 patients (mean age, 75.2 years; 92% male). During a mean follow-up period of 32 months (range, 24-50), 17 patients died (no abdominal aortic aneurysm-related death). Primary clinical success at 2 years was 95.1% (defined as absence of aneurysm-related death, type I or type III endoleak, graft infection or thrombosis, aneurysm expansion >5 mm, aneurysm rupture, or conversion to open repair). Assisted primary clinical success was 100%. CT scan images at a minimum follow-up of 2 years were available in 89 cases. Patency of visceral arteries at the level of suprarenal fixation (zone A) was 100%. Neither graft migration nor barb detachment or neck bulging was observed. None of the patients had significant neck enlargement. The mean change in the diameter was 0.18 ± 0.22 mm at zone A, -0.32 ± 0.87 mm at zone B, and -0.06 ± 0.97 mm at zone C. Changes at zone B correlated significantly with changes at zone C (correlation coefficient, 0.183; P = .05), whereas no correlation was found with zone A (correlation coefficient, 0.000; P = 1.0).
CONCLUSIONS:
No aortic neck dilation occurred in this series at CT scan after a minimum 24-month follow-up. This may suggest that aortic neck evolution is not associated with EVAR at midterm follow-up when an endograft with no chronic outward radial force is implanted
Intraoperative endovascular stenting for iatrogenic carotid artery dissection
No full textPURPOSE:
To describe the endovascular treatment of an iatrogenic common carotid artery (CCA) dissection using the superficial temporal artery (STA) as the principal access.
TECHNIQUE:
An 83-year-old man with a post-carotid endarterectomy left CCA dissection was admitted for a transient ischemic attack involving the left cerebral hemisphere that occurred despite proper anticoagulation. After excluding redo surgery and transfemoral stenting (owing to a partially compromised aortobifemoral bypass graft), stenting of the left CCA dissection was planned using a right transbrachial approach, with the left STA as an additional access. However, intraoperative angiography showed an acute angle between the innominate artery and left CCA, so the STA was used as the primary access route owing to its straight course and 4-mm diameter. The 9-x40-mm self-expanding stent was inserted via a 5-F sheath in the STA and deployed directly at the CCA dissection. The procedure was successful, and all vessels involved were patent at 6-month follow-up.
CONCLUSION:
In selected cases, the superficial temporal artery may represent a valid alternative approach for the endovascular treatment of short CCA dissections
A case of late femoral pseudoaneurysm caused by stent disconnetion
No full textWe present the case of a late superficial femoral artery stent disconnection causing an asymptomatic pseudoaneurysm successfully treated with a stent-graft. A 67-year-old female was referred to our department for evaluation of claudication of the left lower limb and was diagnosed to have a total occlusion of the superficial femoral artery. Three nitinol stents were used to revascularize this artery. At 48 months, duplex-ultrasonography control revealed the presence of a 45-mm saccular femoral dilatation; X-rays and CT angiography showed fractures of the proximal stents and the presence of a pseudoaneurysm at the site of the distal stents disconnection. The pseudoaneurysm was excluded using two stent-grafts. We conclude that patients and surgeons should be aware of structural complications with all stents. Rigorous follow-up controls should be mandatory. Endovascular repair proved to be feasible and durable to manage a previous endovascular procedure
Endovascular repair of a celiac trunk aneurysm with a new multilayer stent
No full textOperative treatment of celiac trunk aneurysms has traditionally involved open repair using simple ligation, interposition graft, resection, and direct repair or antegrade bypass from the aorta; recently, endovascular techniques have been proposed in selected cases. We report a 60-year-old man presenting with a celiac trunk aneurysm that we treated with a new multilayer stent with the aim of preserving the parent vessels arising from the aneurysm. Computed tomography angiography at the 12-month follow-up visit confirmed the patency of the stents, the complete thrombosis of the sac without impairment of the main branches, and the regular perfusion of the liver and spleen
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