Impact of acute kidney injury on long-term outcomes after fenestrated and branched endovascular aortic aneurysm repair

UMMS Affiliation

Department of Surgery; UMass Memorial Center for Complex Aortic Disease; School of Medicine; Senior Scholars Program

Faculty Mentor

Andres Schanzer

Publication Date


Document Type



Cardiovascular Diseases | Medical Education | Surgery | Surgical Procedures, Operative


OBJECTIVE: Acute kidney injury (AKI) has been identified as a common complication after fenestrated and branched endovascular aneurysm repair (F/BEVAR), occurring in 5% to 29% of patients. Predictors of AKI and its impact on long-term outcomes remain unknown. We sought to identify independent predictors of AKI and its effect on long-term survival after F/BEVAR.

METHODS: A single-institution retrospective review of all consecutive F/BEVAR procedures was performed (November 2010-September 2018). Data were collected prospectively through an Institutional Review Board-approved registry and a physician-sponsored investigational device exemption clinical trial (G130210). AKI was defined as a decrease in estimated glomerular filtration rate by > 30% from baseline, within 30 days postoperatively. The cohort was stratified according to whether a patient experienced AKI. Demographics, operative details, perioperative complications, and length of stay between groups were compared. The primary outcome, long-term survival, was assessed with Kaplan-Meier analysis and Cox proportional hazards modeling. Independent predictors of AKI were identified using logistic regression.

RESULTS: Among 219 consecutive F/BEVAR patients, AKI occurred in 41 patients (19%) and was the most common 30-day complication observed. Whereas preoperative creatinine concentration, estimated glomerular filtration rate, and target renal artery stenosis > 50% did not predict AKI, the occurrence of intraoperative complications did correlate with AKI (37% vs 7.3%; P < .01). By 30 days, AKI resolved in 7 (17%) patients, persisted without need for dialysis in 26 (64%), and progressed to dialysis in 5 (12%); the remaining 3 (7%) patients died. Survival at 30 days was significantly lower in the AKI group (92.7% vs 98.9%; P = .047), and this difference persisted at 1 year (68% vs 87%; log-rank, P < .01) and 3 years (44% vs 60%; log-rank, P = .04). On multivariable modeling, AKI increased the hazard of death nearly twofold (hazard ratio, 1.92; 95% confidence interval [CI], 1.11-3.23; P = .019). Independent predictors of AKI on multivariable logistic regression were intraoperative complications (odds ratio, 4.10; 95% CI, 1.61-10.42; P < .01) and increased operating room time (odds ratio, 1.56; 95% CI, 1.22-2.00; P < .01).

CONCLUSIONS: In our 8-year experience of F/BEVAR, AKI was the most common postoperative complication observed in nearly 20% of patients. AKI after F/BEVAR is associated with decreased short- and long-term survival. Whether AKI is causative or just associated with decreased survival remains to be elucidated. Further study is needed to determine whether the independent predictors of AKI, including intraoperative complications and operating room time, are generalizable across all centers performing F/BEVAR and to investigate how we might further mitigate this common and serious complication.


Acute kidney injury (AKI), Complex aortic aneurysms, Fenestrated and branched endovascular aneurysm repair (F/BEVAR), Long-term survival, Renal outcomes

DOI of Published Version



Dossabhoy SS, Simons JP, Crawford AS, Aiello FA, Judelson DR, Arous EJ, Messina LM, Schanzer A. Impact of acute kidney injury on long-term outcomes after fenestrated and branched endovascular aortic aneurysm repair. J Vasc Surg. 2020 Jul;72(1):55-65.e1. doi: 10.1016/j.jvs.2019.09.034. Epub 2019 Dec 14. PMID: 31843300. Link to article on publisher's site

Journal/Book/Conference Title

Journal of vascular surgery


Shernaz Dossabhoy participated in this study as a medical student in the Senior Scholars research program at the University of Massachusetts Medical School.

Related Resources

Link to Article in PubMed

PubMed ID