J Korean Med Sci.  2021 Dec;36(47):e314. 10.3346/jkms.2021.36.e314.

Outcomes after Elective Open Abdominal Aortic Aneurysm Repair in Octogenarians Compared to Younger Patients in Korea

Affiliations
  • 1Division of Vascular Surgery, Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
  • 2Division of Vascular Surgery, Department of Surgery, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
  • 3Division of Vascular Surgery, Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
  • 4Department of Surgery, Yonsei University School of Medicine, Seoul, Korea
  • 5Department of Critical Care Medicine and Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

Abstract

Background
Although the first choice of treatment for abdominal aortic aneurysm (AAA) is endovascular aneurysm repair, especially in elderly patients, some patients require open surgical repair. The purpose of this study was to compare the mortality outcomes of open AAA repair between octogenarians and younger counterparts and to identify the risk factors associated with mortality.
Methods
All consecutive patients who underwent elective open AAA repair due to degenerative etiology at a single tertiary medical center between 1996 and June 2020 were included in this retrospective review. Medical records and imaging studies were reviewed to collect the following information: demographics, comorbid medical conditions, clinical presentations, radiologic findings, surgical details, and morbidity and mortality rates. For analysis, patients were divided into two groups: older and younger than 80 years of age. Multivariate analysis was performed to identify factors associated with mortality after elective open AAA repair.
Results
Among a total of 650 patients who underwent elective open AAA repair due to degenerative AAA during the study period, 58 (8.9%) were octogenarians and 595 (91.1%) were non-octogenarians. Patients in the octogenarian group were predominantly female and more likely to have lower body weight and body mass index (BMI), hypertension, chronic kidney disease, and lower preoperative serum hemoglobin and albumin compared with patients in the non-octogenarian group. Maximal aneurysm diameter was larger in octogenarians. During the median follow-up duration of 34.4 months for 650 patients, the median length of total hospital and intensive care unit stay was longer in octogenarians. The 30-day (1.7% vs. 0.7%, P= 0.374) and 1-year (6.9% vs. 2.9%, P = 0.108) mortality rates were not statistically significantly different between the two groups. Multivariate analysis showed that low BMI was associated with increased 30-day (odds ratio [OR], 16.339; 95% confidence interval [CI], 1.192–224.052; P= 0.037) and 1-year (OR, 8.236; CI, 2.301–29.477; P= 0.001) mortality in all patients.
Conclusion
Because the mortality rate of octogenarians after elective open AAA repair was not significantly different compared with their younger counterparts, being elderly is not a contraindication for open AAA repair. Low BMI might be associated with increased postoperative mortality.

Keyword

Aortic Aneurysm; Abdominal; Open Surgical Repair; Elder elderly; Treatment Outcome

Figure

  • Fig. 1 Kaplan-Meier survival curve of octogenarians and non-octogenarians underwent elective open abdominal aortic aneurysm repair.


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