oh gosh, this brings back memories. ds1 had this scan and they just couldn't find a vein, plus he had eczema which made it even more difficult to see and painful for him. They kept on trying and trying and in the end they got the canular into his foot too.
ds2 (17 weeks) has the same kidney problem and will be having one of those scans on the 21st Sept. I'm really not looking foward to it. I think I'll ask DH to take a day off to go with me, because I'll probably end up crying too.
I hope your DH is feeling better.