Nasogastric decompression should be used intraoperatively for all patients undergoing open aneurysm repair, but in only selected patients postoperatively (Grade 1, Level B).

Elective open aneurysm repair should not be performed unless nutritional status is optimized (Grade 1, Level A).

Parenteral nutrition is recommended if a patient is unable to tolerate enteral support seven days after OSR or EVAR (Grade 1, Level A).