IMR Press / RCM / Volume 23 / Issue 6 / DOI: 10.31083/j.rcm2306208
Open Access Systematic Review
A Systematic Review and Meta-Analysis of Laparoscopic Ligation of the Inferior Mesenteric Artery for the Treatment of Type II Endoleaks
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1 Department of Vascular Surgery, Aristotle University of Thessaloniki, AHEPA University General Hospital, 54621 Thessaloniki, Greece
*Correspondence: andk_79@yahoo.gr (Andreas Koutsoumpelis)
Academic Editor: Zhonghua Sun
Rev. Cardiovasc. Med. 2022, 23(6), 208; https://doi.org/10.31083/j.rcm2306208
Submitted: 8 March 2022 | Revised: 11 April 2022 | Accepted: 27 April 2022 | Published: 1 June 2022
(This article belongs to the Special Issue Abdominal aortic aneurysms: advances in endovascular repair)
Copyright: © 2022 The Author(s). Published by IMR Press.
This is an open access article under the CC BY 4.0 license.
Abstract

Objectives: Type II endoleak (T2E), often generated by persistent retrograde flow through the inferior mesenteric artery (IMA) is the most frequent complication following endovascular aortic aneurysm repair (EVAR). T2E treatment revolves around transarterial and translumbar embolization of the feeding artery and/or sac, with mediocre results. The aim of this study is to assess the safety feasibility and efficacy of laparoscopic IMA ligation for the treatment of T2E. Methods: We conducted a systematic electronic research on Medline, Scopus, EMBASE, and Cochrane Library according to Preferred Reporting Items for Systematic Review and Meta-Analysis protocol (PRISMA) for articles published up to February 2022, describing laparoscopic IMA ligation for the treatment of T2E. Publications describing hand assisted or prophylactic IMA ligation were excluded. A metanalysis was performed utilizing both the random and common effects model and the DerSimonian and Laird method. Additionally, we carried out a post hoc power analysis. Results: Fifteen studies, including one prospective case series (CS), five retrospective CS and nine case reports, including 33 patients (91% male) met the inclusion criteria. The mean abdominal aortic aneurysm diameter at the time of diagnosis was 58.8 mm. The mean operational duration was 117.5 minutes. The mean follow-up for the included studies was 17 months. The mean reported time of T2E identification was 9.1 months post-intervention, while the mean reported aneurysmal sac diameter increase at the time of diagnosis was 11.5 mm. T2E type a (T2aE) and type b (T2bE) patterns were 57.6% and 42.4% respectively. Six CS incorporating 24 patients were included in the meta-analysis. The pooled technical success and postoperative mortality rates are 100% (95% CI: 93.13–100), (I2 = 0.0%, p = 0.99) (power = 99%) and 0.00% (95% CI: 0.00–6.87) (I2 = 0.0%, p = 0.99). The pooled reintervention and conversion to open surgical repair rates are 15.08% (95% CI: 0.79–37.28), (I2 = 0.0%, p = 0.66) (power = 13.6%), and 0.69% (95% CI: 0.00–14.80) (I2 = 0.0%, p = 0.99) (power = 7.05%) respectively. Conclusions: We demonstrated the safety and feasibility of IMA ligation for the treatment of T2E. Definitive conclusions about its efficacy cannot be drawn due to underpowered results warrantying further research. Identification and proper classification of T2E remain an obstacle affecting treatment outcomes and reintervention rates throughout the entire spectrum of available treatments.

Keywords
type II endoleak
laparoscopic ligation
IMA ligation
inferior mesenteric artery
Figures
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