A comparison of clinical outcomes of abdominal aortic aneurysm patients with favorable and hostile neck angulation treated by endovascular repair with the Treovance stent graft

J Vasc Surg. 2020 Jun;71(6):1881-1889. doi: 10.1016/j.jvs.2019.07.096. Epub 2019 Nov 2.

Abstract

Objective: The objective of this study was to compare outcomes of patients with favorable neck angulation (FNA) and hostile neck angulation (HNA) treated with the Treovance stent graft (Terumo Aortic [formerly Bolton Medical], Sunrise, Fla).

Methods: Patients with abdominal aortic aneurysms suitable for endovascular repair with Treovance were included in the RATIONALE postmarket surveillance registry. A post hoc subgroup analysis compared patients with infrarenal neck angles <60 degrees (FNA) and ≥60 degrees (HNA).

Results: After 1 year, 179 FNA (89.5%) and 21 HNA (10.5%) patients were analyzed. Both groups were similar in terms of sex (male, 92.7% FNA and 95.2% HNA) and age (73.0 years vs 72.6 years), but the HNA group had more Asian or other race representation (7.3% vs 19.0%) and more patients assigned to American Society of Anesthesiologists class 3 and class 4 (57.6% vs 66.7%). Mean suprarenal angles (standard deviation) were 13.1 (±13.5) degrees vs 29.0 (±16.4) degrees; mean infrarenal angles were 23.2 (±16.4) degrees vs 65.4 (±4.6) degrees, respectively. Aneurysm sac size maximum diameter was 58.1 (±9.8) mm vs 62.0 (±14.1) mm. There was a significant difference in unplanned adjunctive procedures (2.2% vs 19.0%; P = .01). Mean procedural duration was also significantly different for HNA patients, who underwent protracted operations (111.3 [±47.3] minutes vs 153.5 [±44.5] minutes; P < .0001). However, there were no significant differences in rates of clinical success (96.1% vs 95.2%). The rate of reintervention was low overall but 0% in the HNA group. Changes in sac size at 1 year were significant in both groups but not as pronounced in HNA patients (relative change of -11.8% [±13.3] vs -6.6% [±11.4]).

Conclusions: Patients with high neck angulation treated with Treovance underwent more complex procedures but showed equally good technical success and 1-year clinical success parameters.

Trial registration: ClinicalTrials.gov NCT03449875.

Keywords: Abdominal; Aneurysm; Angulation; Aorta; Endovascular.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Aortic Aneurysm, Abdominal / diagnostic imaging
  • Aortic Aneurysm, Abdominal / surgery*
  • Blood Vessel Prosthesis Implantation / adverse effects
  • Blood Vessel Prosthesis Implantation / instrumentation*
  • Blood Vessel Prosthesis*
  • Endovascular Procedures / adverse effects
  • Endovascular Procedures / instrumentation*
  • Female
  • Humans
  • Male
  • Postoperative Complications / etiology
  • Product Surveillance, Postmarketing
  • Prospective Studies
  • Prosthesis Design
  • Registries
  • Risk Factors
  • Stents*
  • Time Factors
  • Treatment Outcome

Associated data

  • ClinicalTrials.gov/NCT03449875