"Lack of information"

I was there to have a CT scan; I wasn't told in advance they had to take blood and have it tested.

The test took too long and I had to leave before the scan to be home for my disabled daughter.

This could easily have been avoided by stating how long I could be there for. Instead I drove all the way from Lincoln to Boston for what was a wasted journey.

Perhaps a few lines in the appointment letter stating how long you might be there could help.