My two have had ultrasounds. From my experience they can be a useful tool IF you have some idea of what you are looking for and the right person on the other end of the ultrasound.
Sarah: She had one when she was undiagnosed. Her pain was over the right kidney and it picked up what they thought was a PUJ abnormality. She was then sent for nuclear testing which proved that diagnosis to be wrong, it only picked up that she was slow to empty that kidney. IBD was not on the radar so it did not pick up that actual problem was hydronephrosis caused by the inflamed terminal ileum pressing against the right ureter and causing urine to back up into the kidney.
Matt: He has had five. Two Crohn's related and three not.
1. At the first suspicion of him having CD he was sent for an abdominal CT. When we arrived at radiology they were loathe to do a CT on a very slim 17 year old. They eventually rang the GP and recommended an ultrasound be done instead. I told the radiographer that the area of suspicion was the terminal ileum and we results that day indicating that all was normal except for some free fluid in his abdomen of unknown origin.
2. The GP and the GI did not believe the result so he was sent for another urgent ultrasound the next day. This time the radiologist was also in the room and they then found thickening of the terminal ileum.
3. A couple of months post op he had a queried hernia and it was thought to be an incisional one. He was sen for an ultrasound but they weren't able to locate it. It then went into hibernation for about 12 months.
4. A few months post op he experienced flank pain so the GP ran some tests including an ultrasound of his urinary system. This returned a normal result and he has had no further problems.
5. The queried incisional hernia appeared again but it was now apparent that it was an inguinal hernia and this time the ultrasound had no problem picking it up.
Dusty.