To provide a robust view of EVAR surveillance at UHL, this study proposes to retrospectively assess the surveillance programme to get a better view of post-operative complications following endovascular aneurysm repair.

It will seek to identify complications that required reintervention, establish reintervention rates, and attempt to compare which imaging modalities provide the best data on post-EVAR complications.

From 2006 to 2024, the UHL EVAR programme collected scan information on patients following endovascular repair of abdominal aortic aneurysms (AAA) and iliac aneurysms. Prior to 2015, surveillance of EVAR patients was organized by referral only. Since January 2015, structured surveillance with CDUS and CTA was performed less than 6 weeks postoperatively and then continued with automatically scheduled US scans every 6 months. Surveillance with CDUS (performed by a vascular physiologist) and CTA (interpreted by a consultant radiologist). Data on individual surveillance and complications has been collected and is available for analysis.

Inclusion Criteria:

Included in registry of patients under surveillance with UHL Department of Vascular Surgery

Under surveillance from March 2006 - December 2024

Underwent EVAR for AAA or iliac aneurysm repair

Surveillance performed with both CDUS and CTA with reports available

Exclusion Criteria:

Not in registry for EVAR surveillance

Not under surveillance during study period

Underwent open repair for AAA or iliac aneurysm

Both CDUS and CTA not available

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This study will utilize an existing dataset at UHL which contains surveillance & follow-up information for patients who underwent EVAR procedures for AAA or iliac aneurysms between March 2006 and December 2024.

We have presented our findings at one conference to date and have applied for a second. We will select a suitable journal and aim to get an article publication also.

From March 2026