Durring the discogram you are going to either be laid on your side or on your belly.
They will slightly sedate you and I mean slightly. You have to be fully aware for the doctor while this test is being performed.
The doctor is going to insert several needles into your back. He/she may do two or three levels to see if you are experienceing pain in only one or more discs.
They will then inject a contrasting die into your disc to apply pressure to the disc and mimic the pain you are experiencing on a normal basis or to cofirm that you do not have disc pain but some other pain.
After the test is complete, and if it is confirmed that you do have disc pain. You will be sent to ct scan to see if your discs are leaking the die.
It is an extremely painful test but with good anesthesia practice, you will not remember much of it.
Charite is an artificial lumbar disc, you may be faced with surgery if these tests are conclusive. I would recommend having the disc over fusion if you are given the choice.