Epidural abscess: a hazard of spinal epidural anaesthesia.

Two cases of spinal epidural abscess following prolonged epidural anaesthesia are presented. The clinical features included fever, malaise, and signs of nerve root compression; backache was not marked. Prompt surgical drainage and appropriate antibiotics are required to avoid the costly sequelae of bladder and leg paralysis from spinal cord compression. Both infections were caused by bacterial contamination of catheter, and although this complication is uncommon, it emphasizes that strict asepsis is essential during continuous epidural anaesthesia.