Assessing Endovascular Aneurysm Repair Suitability According to Graft-Specific Instructions for Use in Patients With a Ruptured Abdominal Aortic Aneurysm

Abstract

Purpose:

The purpose of the study is to ascertain endovascular aneurysm repair (EVAR) suitability in relation to stent-graft-specific instructions for use (IFU) in patients with a ruptured abdominal aortic aneurysm (RAAA).

Materials and Methods:

Using the preoperative computed tomography angiography (CTA), the aortic morphology of patients undergoing surgical repair of a RAAA in 2 Dutch hospitals between January 2014 and December 2019 was retrospectively assessed. Three-dimensional and central luminal line reconstructions were used. Anatomical suitability was defined according to the IFU of the stent graft system used.

Results:

Of 128 included patients, 112 (88%) were men and the mean age was 74.1 (SD=7.6) years. Anatomy within IFU for EVAR was present in 31 patients (24%). Overall, 94 patients (73%) were treated with open surgical repair (OSR) and 34 patients (27%) were treated with EVAR. Anatomy within IFU was present in 15 OSR patients (16%) and 16 EVAR patients (47%). In patients with anatomy outside of IFU, 90% (87/97) had unsuitable neck anatomy and 64% (62/97) had insufficient neck length. An unsuitable distal iliac landing zone was observed in 35 patients. Perioperative mortality was 27% (34/128), with no difference between OSR and EVAR (25/94 vs 9/34; p=0.989).

Conclusion:

Most RAAA patients in this series did not have aortic anatomy within IFU for EVAR, mainly due to insufficient neck length. However, whether anatomy outside of IFU equates to unsuitability for EVAR in an emergency setting remains a matter of debate and warrants further research.

Clinical Impact

The treatment of a ruptured abdominal aortic aneurysm can consist of endovascular repair or open repair. Retrospective anatomical assessment shows that most patients do not have anatomy inside the instructions for use for endovascular aneurysm repair, mainly due to insufficient neck length. Whether anatomy outside the instructions for use equates unsuitability for endovascular aneurysm repair remains a matter of debate.

Keywords

abdominal aortic aneurysm aorta imaging rupture vascular surgery endovascular aneurysm repair

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