Multicenter comparison between open conversions and semi-conversions for late endoleaks after endovascular aneurysm repair.

OBJECTIVE: The aim of this study is to compare early and follow-up outcomes of late open conversions (LOC, with complete or partial endograft explantation) and semi-conversions (SC, with endograft preservation) after endovascular aneurysm repair in a multicenter experience. METHODS: All LOC and SC performed from 1997 to 2020 in 11 vascular centers were compared. Endograft infections or thrombosis were excluded. Primary endpoints were early mortality and long-term survival estimates. Secondary endpoints were differences in postoperative complication rates and conversion-related complications during follow-up. RESULTS: In the considered period, 347 patients underwent surgery for endovascular aneurysm repair complications. Among these, 270 were operated on for endoleaks (222 LOC, 48 SC). The two groups were homogeneous in terms of American Society of Anesthesiologists score (LOC, 3.2 ± 0.7; SC, 3 ± 0.5; P = .128) and main endograft characteristics (suprarenal fixation, bifurcated/aorto-uni-iliac configuration). The mean age was 75 ± 8 years for LOC and 79 ± 7 years for SC (P = .009). Reasons for LOC were: 62.2% (138/222) type I endoleak, 21.6% (48/222) type II endoleak, 7.7% (17/222) type III endoleak, and 8.5% (19/222) endotension. Indications for SC were: 64.6% (31/48) type II endoleak, 33.3% (16/48) type I endoleak, and 2.1% (1/48) type III endoleak. Thirty-day mortality was 12.2% (27/222) in the LOC group, and 10.4% (5/48) in the SC group (P = .73). Postoperative complication rate was higher in the LOC group (45.5% vs 29.2%; P = .04). The estimated survival rate after LOC was 80% at 1 year and 64% at 5 years; after SC, it was 72% at 1 year and 37% at 5 years (log-rank P = .01). During the median follow-up of 21.5 months (interquartile range, 2.4-61 months), an endoleak after SC was found in the 38.3% of the cases; sac growth was recorded in the 27.7% of SC patients. CONCLUSIONS: SC has an early benefit over LOC in terms of reduced postoperative complications but has a significantly inferior mid-term survival. The high rates of persistent and/or recurrent endoleaks reduce SC durability.

Retrograde Deep Femoral Artery Access as Bailout Technique to Rescue Unexpected Ostial Occlusion during Antegrade Superficial Femoral Artery Recanalization.

We report a case of deep femoral artery (DFA) retrograde access for recanalization of an accidental ostial occlusion complicating an antegrade-retrograde superficial femoral artery (SFA) procedure. A 77-year-old man with chronic limb-threatening ischemia of the right lower limb was submitted to a duplex ultrasound that showed a heavy calcified SFA chronic total occlusion. During antegrade and retrograde attempts to cross the SFA obstruction, a control angiogram unexpectedly showed the ostial occlusion of the DFA. Several antegrade attempts to cross the DFA occlusion with various guidewires and catheters were unsuccessfully made. Retrograde access was achieved by direct puncture of the DFA distally to the first perforating artery. With sheathless approach, the occlusion was crossed, the retrograde guidewire was externalized through the femoral sheath, and the balloon angioplasty was then performed antegradely. The SFA recanalization was interrupted because of patient discomfort. The patient had an uncomplicated recovery, with immediate resolution of rest pain probably because of the resolution of the underestimated DFA stenosis. The retrograde DFA access is a useful bailout technique in case of accidental ostial occlusion of the DFA.

Arteriovenous Fistula of the Peroneal Artery Complicating a Retrograde Access: Successful Endovascular Treatment with Covered Stent Implantation.

An 80-year-old woman developed a recurrent chronic limb-threatening ischemia of the right lower limb after a popliteal artery (PA) recanalization with retrograde puncture of the peroneal artery (PR). The angiography showed the PA restenosis and an arteriovenous fistula (AVF) at the previous peroneal retrograde access site. After the PA angioplasty, the AVF was identified through selective contrast injections in multiple projections. A coronary balloon-expandable covered stent was deployed at the AVF site with complete resolution of the AVF. The final angiography demonstrated the patency of PA and PR with complete resolution of the AVF. The patient was discharged without complications, with regression of rest pain. The foot lesion healed within 2 months.

Femoral Balloon-Oriented Puncture for True Lumen Reentry in the Common Femoral Artery After Subintimal Retrograde Recanalization of Superficial Femoral Artery Ostial Occlusion: The FORLEE Technique.

Purpose: To report a new technique to reenter the common femoral artery (CFA) true lumen after retrograde recanalization of a superficial femoral artery (SFA) with flush ostial occlusion. Technique: The technique is demonstrated in a 76-year-old woman with critical limb ischemia previously submitted to several surgical revascularizations. A duplex ultrasound showed flush ostial occlusion of the SFA and patency of the anterior tibial artery at the ankle as the sole outflow vessel. After unsuccessful antegrade attempts to recanalize the SFA, a retrograde guidewire was advanced subintimally up to the CFA, without gaining reentry. A balloon catheter was inflated in the subintimal plane across the SFA ostial occlusion. Antegrade access to the distal CFA was achieved with a 20-G needle, which was used to puncture the balloon. A guidewire was advanced into the balloon and pushed forward while the collapsed balloon was pulled back to the mid SFA. The antegrade guidewire was externalized through a retrograde catheter, which was pushed in the CFA true lumen. A retrograde guidewire was advanced and externalized through the femoral sheath, establishing a flossing wire. The procedure was completed in antegrade fashion. Conclusion: The FORLEE technique is a cost-effective option to gain the CFA true lumen after subintimal retrograde recanalization of an ostial SFA occlusion.

Twenty-Five Year Multicentre Experience of Explantation of Infected Abdominal Aortic Endografts.

We report a multicenter experience of open conversions (OC) for aortic endograft infections (AEI). We retrospectively analyzed all patients who underwent OC for AEI after endovascular aneurysm repair (EVAR), from 1997 to 2021 in 12 Italian centers. The endpoints were as follows: mortality (30-days, in-hospital), major postoperative complications. Follow-up data included: survival, aortic-related complications, infection persistence or reoccurrence. Fifty-eight patients (mean age: 73.8 ± 6.6 years) were included. Median time from EVAR to OC was 14 months (interquartile range 7-45). Thirty-five patients (60.3%) were symptomatic at presentation. Aortic reconstruction was anatomic in 32 patients (55.2%), extra-anatomic in 26 (44.8%). Thirty-day mortality was 31% (18/58). Six additional patients died after 30 days during the same hospitalization (in-hospital mortality: 41.4%). Most common post-operative complications included respiratory failure (38.6%) and renal insufficiency (35.1%). During 28.1 ± 4 months follow-up, 4 aneurysm-related deaths were recorded. Infection re-occurred in 29.4% of the patients. Estimated survival was 50% at 1 year, and 30% at 5 years, and was significantly lower for patients who underwent extra-anatomic reconstructions (37 vs 61% at 1 year, 16 vs 45% at 5 years; log-rank P = .021). OC for AEI is associated with high early mortality. The poor mid-term survival is influenced by aortic complications and infection re-occurrence.

Substent Anchor Technique for Recanalisation of a Full Metal Jacket Femoropopliteal In-Stent Occlusion.

PURPOSE: To report the endovascular treatment of a full metal jacket (FMJ) femoropopliteal chronic total occlusion (CTO) using a new ancillary retrograde technique. CASE REPORT: An 80 year old woman with type 2 diabetes presented to the Diabetic Foot Clinic with critical limb ischaemia with tissue loss in the right leg. Her comorbidities included coronary artery disease, morbid obesity, hypertension, dyslipidaemia, and active smoking habit. The patient had been treated at another hospital by femoropopliteal FMJ stenting six years before this presentation. The duplex ultrasound showed a full length in-stent re-occlusion. An antegrade recanalisation was attempted via contralateral femoral access, but was unsuccessful. An ultrasound guided retrograde puncture of the popliteal artery in the P2 segment was performed very close to the distal occluded stent. A 0.018 guidewire was pushed in the substent plane, functioning as an anchor to achieve a stable system. The FMJ was then retrogradely recanalised with a second guidewire. The procedure was completed by antegrade angioplasty with drug coated balloons. CONCLUSION: The substent anchor technique can help to achieve stability even if close to the occluded stents, and spares the distal landing zone for surgical revascularisation if the endovascular approach fails. This technique could be useful in retrograde treatment of long in-stent CTO.

Unstable thoracic spine fracture with aortic encroachment: A potentially fatal association and a suggested treatment.

BACKGROUND: The coexistence of an unstable spinal fracture with a pending aortic lesion is potentially catastrophic and a therapeutic challenge as to timing of treatment, assigning priorities and selecting the best approach. CASE REPORT: A 41 year-old healthy male victim of bike accident. Imaging revealed a fracture of 6th and 7th thoracic vertebrae with a bone fragment in close proximity to the descending thoracic aorta. After consultation with spine/vascular surgeons and interventional radiologists it was decided to secure the potential aortic injury with an endovascular stent-graft followed by posterior vertebral instrumentation for fracture's reduction. DISCUSSION/CONCLUSION: A multi-specialists teamwork approach is mandatory. Vascular lesion is priority, followed by vertebral surgery. As to the treatment options, we suggest a "best but still safest" philosophy: endovascular repair and posterior spinal instrumentation should be considered first in the acute stage.