Early and mid-term outcomes of open popliteal artery aneurysm repair with prosthetic grafts

Great saphenous vein versus expanded polytetrafluoroethylene graft in patients undergoing elective treatment of popliteal artery aneurysm with posterior approach

BACKGROUND

Aim of this study is to compare 30-day and 5-year outcomes of great saphenous vein (GSV) vs. expanded polytetrafluoroethylene (ePTFE) graft in patients undergoing elective treatment of popliteal artery aneurysm (PAA) using a posterior approach.

METHODS

Between January 2010 and December 2023, a retrospectively maintained dataset of all consecutive asymptomatic PAAs who underwent open repair with posterior approach or endovascular repair in 40 centers was investigated. Out of of 971 cases, 525 patients were included in the present analysis. These were further divided into: posterior approach with GSV graft (252, GSV Group), and posterior approach with ePTFE graft (273, ePTFE Group). Thirty-day outcomes were assessed and compared. During follow-up, survival, primary patency, secondary patency, freedom from reintervention(s), and amputation-free survival were compared between the two groups using log-rank tests. Uni- and multivariate Cox regression analyses were performed in ePTFE Group to find predictive factors of poor outcomes.

RESULTS

Two groups were homogeneous in terms of preoperative risk factors and morphological data. Median follow-up duration was similar [24 months (IQR 10 - 36) GSV Group vs. 21 months (IQR 7-47) ePTFE Group; p = .123]. At 5 years, there were no differences between the two groups in terms of survival (84.7% GSV Group vs. 86.1% ePTFE Group; p = .097, log-rank = 2.756), secondary patency (94.9% GSV Group vs. 89.4% ePTFE Group; p = .068, log-rank = 3.336), and amputation-free survival (99.1% GSV Group vs. 99.6% ePTFE Group; p = .567, log-rank = .328). Five-year primary patency (89.5% GSV Group vs. 76.2% ePTFE Group; p = .007, log-rank = 7.239), and freedom from reintervention(s) (92.8% GSV Group vs. 80.6% ePTFE Group; p = .011, log-rank = 6.449) were significantly higher in GSV Group. Using multivariate analysis in ePTFE Group, factors compromising primary patency were patients on dialysis (p = .054, OR = 3.641), and patients that were not on any preoperative antiplatelet therapy or anticoagulation (p = .019, OR = 5.532), whilst none of the perioperative factors affected freedom from reintervention(s).

CONCLUSION

GSV as graft guaranteed better primary patency with less reinterventions rates at mid-term follow-up after treatment of PAAs via a posterior approach. Patients on dialysis and who were not on any preoperative antiplatelet therapy or anticoagulation had lower patency rates.

Early and long-term results of surgical treatment of popliteal artery aneurysms using a heparin-bonded expanded polytetrafluorethilene graft

BACKGROUND

The aim of the present study was to assess early and long-term results of open surgical interventions for popliteal artery aneurysms (PAAs) with the use of heparin-bonded expanded polytetrafluorethylene (HePTFE) in a single center, retrospective, non-comparative cohort study.

METHODS

A retrospective analysis of a prospectively maintained dataset, including 207 open interventions for PAAs between 2002 and 2022, was performed and 170 procedures carried on with the use of a HePTFE graft were found. Perioperative results were analyzed in terms of mortality, graft thrombosis and amputation rates. Follow-up results were analyzed in terms of survival, primary and secondary patency, freedom from amputation, freedom from reintervention with life-table analysis and Kaplan Meier curves. Follow-up results were considered as primary outcomes, whereas perioperative results were considered as secondary outcomes.

RESULTS

In 82 interventions (48%) the PAA was asymptomatic. In 140 cases a medial approach was used, while in 30 cases a posterior approach was preferred. The level of the distal anastomosis was the p3 tract of the popliteal artery in 89% of the cases. One perioperative death occurred; early thromboses occurred in eight cases and the overall perioperative amputation rate was 2.8%. The median duration of follow-up was 48 months (range 1-251). Estimated survival rate at 10 years was 55% (standard error, SE, 0.065). The 10-year rates of primary and secondary patency and freedom from amputation were 40.8% (SE 0.06), 47.6% (SE 0.065) and 93.4% (SE 0.04), respectively. The estimated freedom from reintervention rate at 10 years was 57% (SE 0.05).

CONCLUSIONS

The results of this large monocentric experience showed that open surgical repair of PAAs with HePTFE is a safe procedure, with low rates of perioperative complications, and excellent results in the long-term setting.