COMPARISON OF OPEN AND ENDOVASCULAR TREATMENT OF INFRARENAL ABDOMINAL AORTIC ANEURYSMS OVER 10 YEARS ON THE QUESTION OF FACTORS INFLUENCING SURGICAL METHODS f.meyer@med.ovgu.de

PE056

COMPARISON OF OPEN AND ENDOVASCULAR TREATMENT OF INFRARENAL ABDOMINAL AORTIC ANEURYSMS OVER 10 YEARS ON THE QUESTION OF FACTORS INFLUENCING SURGICAL METHODS

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Germany

Poster Exhibition only

Objective: Retrospective study comparing OAR and EVAR with the aim to identify perioperative factors influencing the choice of surgical procedure.

Over a defined time period, demographic data, cohort-associated data, aneurysm-derived factors, and treatment-related parameters were analysed in a clinical systematic, single-centre observational study comparing treatment procedures for abdominal aortic aneurysms (AAA).

The study population consisted of 324 consecutive patients who had undergone elective surgery for an infrarenal AAA from January 1, 2006, to August 29, 2016, using either EVAR or OAR (sex ratio, 90.4% males; 9.6% females; mean age, 71.1 years). There were no significant differences between the groups in terms of age and gender distribution. Hypertension was found in over 80% of patients. There was no significant correlation between body mass index (BMI) and maximum AAA transverse diameter. The maximum AAA diameter had no influence on the therapeutic decision-making. EVAR resulted in shorter operating times, shorter hospital as well as intensive-care-unit (ICU) stays. However, reinterventions were mainly observed after EVAR procedures. The 30-day mortality in the OAR cohort was 0.98% (95%-CI: 0-2.1%) while in the EVAR group, there was no death within 30 days. Overall mortality was comparable in the trend analysis for both groups.

The early advantages of EVAR for infrarenal AAA are reflected in the long-term follow-up setting. The decision-making for one of the two treatment methods should be made individually with the patient also based on patients-associated characteristics and should include a transparency of the advantages and disadvantages of each method.