"Lack of support for my mum"

My Mum recently had an appointment at the Institute of Neurological Sciences for a CT scan.  She was already anxious about the appointment and just hoping it would help give some answers for how she was feeling. 

She was called into the room as normal and got in the position to have the CT scan carried out.  When the CT scan was complete my Mum asked the staff in the room for some assistance to get up off of the CT scanner bed and onto her feet. One of the staff she asked for help turned to my Mum and asked her how she got out of bed in the morning and stood watching as my Mum struggled off of the bed and did not offer any assistance.

She would not have asked for help unless she needed it and I would have expected at least the smallest amount of compassion from NHS staff who are there to assist patients. 

Instead my Mum struggled, got up and let the appointment humiliated having been spoken to this way and left to struggle on her own.  This staff member has no idea of my Mum's circumstances at home, not that it should matter, in a caring profession if a patient asks for assistance/help, why is this not provided as a bare minimum. 

The other staff member in the room stayed silent the entire time and also didn't offer my Mum any assistance.  My Dad was at the appointment with my Mum to assist her, of course he cannot enter the CT scanning room.

 I have worked in the NHS and other care settings for many years, I am aware that all staff who work with patients are trained in safe moving and handling practices to ensure they are equipped with the knowledge to assist patients safely, why did this not happen on this occasion?