We use ultrasound frequently for IV access. We generally place them in the upper arm/bicep area. This has been very helpful in the ER when someone with limited access needed a site quickly. It can be a lifesaver and help reduce repeated sticks. I also agree with others comments regarding placing in the AC. Why do that when you have US that enables you to find a vessel in a more convenient location. FYI, I always use a longer catheter when I use US.
SUE