how do you get IMA territory ischemia w/ a fem-pop??? are you kidding me? what kind of surgeons are you dealing with?
i bet it has nothing to do w/ fem pop and that this is just a vasculopath who happened to get IMA ischemia...
as long as there is ischemia going on, there is NO good pain control other than improving blood flow...
1) get a 2nd opinion from another vascular surgeon
2) talk to vascular IR and find out if they can stent open the IMA?
3) consider an epidural if oral pain control insufficient and patient not currently anti-coagulated.... i would not do a denervation (and celiac plexus ain't gonna cut it) in a patient with ischemic issues, cause by the time you find out the gut has infarcted, the ptient will be dead.
4) make the patient NPO, get parenteral IV nutrition started and come up with other strategies to de-stress the gut...
this sounds like a horrible situation.