Ascending aortic aneurysm 4.9cm - can I fix my hip first?

I am a 76 year old retired emergency physician. I have an ascending aneurysm, followed for 15 years, and getting into concerning numbers - aortic root (sinus of valsalva) 4.7, ascending aorta 4.9. I don't have any know connective tissue disorders or a biscuspid aortic valve. I was getting ready to schedule a R hip replacement when I had my annual chest MRI. My thoracic surgeon at UCSD has told me he believes there is some risk of rupture when undergoing unrelated surgery, and recommends repairing the aneursym, currently asymptomatic, before the hip, which hurts! I can't find much online documentation supporting that risk - just one article that conectures that blood pressure spikes related to anesthesia could be a concern - but I can't find a study showing that there actually is an increased risk. I'd rather get the hip fixed, and not have that pain while trying to recuperate from open chest surgery which is probably not quite indicated yet. Anyone have any experience with this situation?