An 88-year-old man receiving home oxygen therapy for about 10 years was admitted to our hospital in a shock state and the abdominal computed tomography scanning revealed ruptured abdominal aortic aneurysm(AAA) with a maximum diameter of about 70mm. We performed an emergency operation and the AAA was replaced with a straight vascular graft. He was extubated on the 1st postoperative day and received noninvasive positive pressure ventilation(NPPV) for hypercapnic respiratory failure. He received continuous hemodiafiltration(CHDF) for oliguria. He was discharged from our intensive care unit on the 3rd postoperative day and was discharged from our hospital on the 24th postoperative day.
