Extraperitoneal unilateral iliac artery bypass for chronic XXXX .

@entity1 @entity6250 @entity384 @entity66
Extraperitoneal unilateral iliac artery bypass was used to treat chronic @entity6250 in 105 @entity1 (110 operations). This represented 20% of all operations for aorto- @entity66 . Unilateral iliac bypass was the preferred primary procedure for 99 operations, and was used to correct complications in one limb of a prior aortic bifurcation graft in the other 11. Ipsilateral femoropopliteal vein grafts were also performed in 45 legs (43%), prior to the iliac bypass in 18, as a synchronous operation in nine, and at a later date in 18 legs. This was a much higher proportion of combined operations than for @entity1 by aortic bifurcation grafts (12%). Only 5 @entity1 later required further proximal surgery, one for a blocked graft and four for @entity66 . The cumulative patency rate in surviving @entity1 was 91% at 3 years. For the claudicants and for iliofemoral bypass operations, only one graft occluded, within 5 years, and no grafts occluded for operations where the superficial femoral artery was patent. The cumulative patency rates at 3 years were 85% for @entity1 with critical ischaemia, 82% for ilioprofunda bypass operations, and 88% for operations where the superficial femoral artery was occluded. The cumulative foot-salvage rate in surviving @entity1 initially treated for critical ischaemia was 77% at 3 years. The cumulative survival rate was 90% at 3 years. Extraperitoneal unilateral iliac bypass is now preferred as the primary operation for @entity1 with apparent unilateral @entity66 causing severe ischaemia, if @entity384 is not appropriate or has failed.
