There was a recent article in one of the major journals which, unfortunately, I do not have at my immediate disposal as I respond, demonstrating a statistically significant increase in post-op ileus in bowel cases with the use of morphine PCA. This has likwise been my anecdotal experience. I attempt to discontinue the continuous MS infusion within 24-36 hours and supplement most patients with Toradol q6h during the first 24 hours. This has seemed to work well, most patients beginning oral alimentation in 2-3 days. There will always be the occasional patient destined to get the "bloats". They are usually the ones who require foley catheter reinsertion as well. I find that postop ileus is the single most frequent factor contributing to lenghtened hospital stays. I'll try to ferret out the reference and forward it to you.