Is organ ischaemia a determinant of the outcome of operations for suprarenal aortic aneurysms?

Objective: To find out if morbidity and mortality after thoracoabdominal approaches for suprarenal aortic aneurysms are related to the duration of organ ischaemia.
Design: Retrospective study.
Setting: University hospital, The Netherlands.
Subjects: 72 operations for suprarenal aortic aneurysms.
Main Outcome Measures: Duration of organ ischaemia, morbidity and mortality.
Results: There were 72 patients with 3 group A (Crawford type III), 10 group B (Crawford type IV), 37 group C (supracoeliac), and 22 group D (suprarenal) aneurysms. Median duration of ischaemia was 57 minutes for both the spinal cord and the mesenteric arteries, and 59 and 63 minutes for the right and left renal arteries, respectively. There were 52 major complications in 33 patients. Mesenteric ischaemia of longer than 60 minutes was associated with a significant higher complication rate (21/32, 66% compared with 13/40, 33%, p = 0.01). Spinal cord ischaemia of longer than 60 minutes was not associated with a significantly increased incidence of paraplegia (2/40 compared with 6/32, p = 0.13).
Conclusions: We conclude that with surgery for suprarenal aneurysms a significant higher complication rate is noted with increased duration of mesenteric ischaemia.