Hello and welcome to HCM,
I am sorry for your aunt's condition.
The severe pain
associated with spinal fusion
can be controlled by palliative care
I assume that the routine pain killers has stopped relieving the pain.
Palliative pain relief provides pain relief without affecting the underlying disease process.
Opoids are commonly used for this purpose and the intake can be controlled by the patient himself/ herself.
The drug is taken by the patient in pulses whenever required.
You need to consult an orthopedician and a physiotherapist for the maintenance of appropriate position.
Bony fusion of the vertebrae is more or less permanent, however, you can consult an orthopedician for better management of the awkward position and internal damage caused.
Thanks and take care
Dr Shailja P Wahal