Scoliosis and slip disc can take Epidural?

Hi Mummies.. wanted to know if anyone is like me who has a scoliosis issue and had slip disc on the back who took epidural during delivery? The anaesthetist told me that there is a risk whereby the epidural won’t work, or they might not even be able to locate the right area for injection.. I didn’t took epidural for my first child 9 yrs ago. But i’m worried for this child especially my body condition is not as strong as before. Anaesthetist mentioned she could only recommend PCA. Anybody has any suggestions, pls? Thanks!