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  • Title: Evaluation of the complexity of open abdominal aneurysm repair in the era of endovascular stent grafting.
    Author: Costin JA, Watson DR, Duff SB, Edmonson-Holt A, Shaffer L, Blossom GB.
    Journal: J Vasc Surg; 2006 May; 43(5):915-20; discussion 920. PubMed ID: 16678683.
    Abstract:
    OBJECTIVE: Endovascular repair has proven to be an effective treatment for many abdominal aortic aneurysms (AAA). Aneurysms that require open repair have usually been disqualified from an endovascular approach as a result of a variety of anatomic constraints, which may also make open repair more difficult. Our purpose was to review open AAA repair and assess the complexity of the operative procedure and associated morbidity and mortality data in the era of endovascular stent grafting. METHODS: We retrospectively reviewed the records of 606 patients undergoing elective open AAA repair at a single tertiary care community hospital from January 1, 1996, to December 31, 2004. Patients with ruptured aneurysms and all endovascular repairs were excluded. Patients were grouped into two categories. Group 1 included 301 patients who underwent open repair before the initiation of an endovascular stent grafting program in November 1999. Group 2 included 305 patients who underwent open repair after the initiation of the stent graft program. Operative reports were reviewed to determine the location of the proximal aortic cross clamp, management of the renal vein, associated iliac aneurysmal or occlusive disease, and type of surgical reconstruction. Morbidity, mortality, and disposition data were compared for the two groups and subjected to chi2 analysis. RESULTS: Suprarenal aortic cross-clamp placement was required in 6% of group 1 patients and 20% of group 2 patients (P < .05). Division of the renal vein was necessary in 11% of group 1 patients and 18% of group 2 patients (P < .05). Iliac aneurysms were present in 25% of group 1 patients and 42% of group 2 patients (P < .05). The incidence of associated iliac occlusive disease was 12% in group 1 and 20% in group 2 (P < .05). The type of reconstruction required (aortoaorto, aortoiliac, aortofemoral) was not found to be statistically significant. All major sources of morbidity, including renal insufficiency, myocardial infarction, stroke, and intubation times, were similar between the two groups. The length of stay was 9.2 days in both groups, and 11.3% of group 1 patients and 26% of group 2 patients were discharged to an extended-care facility rather than directly home. The overall mortality rate was 2.0% for patients in group 1 and 3.8% for group 2 patients. This was not a statistically significant difference. CONCLUSIONS: Surgeons performing open repair of AAA in the era of endovascular stent grafting are operating on patients who require more complex repairs, including a greater frequency of suprarenal cross clamping, renal vein division, and management of associated iliac aneurysmal and occlusive disease. Despite this, morbidity and mortality rates are similar to those in patients operated on before the initiation of an endovascular stent grafting program.
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