A nerve conduction velocity test can alert the physician to slowness of signals traveling along the nerve pathways. A spinal tap may be done to examine the cerebrospinal fluid for abnormalities. Reflexes are often absent in GBS, so careful testing of the reflexes is useful. Lastly, muscle strength testing will evaluate muscle weakness. There are treatments available that may lessen the severity of the disorder and speed up the recovery.
Plasmapheresis is a treatment that is commonly used.
Whole blood is removed from the body and red and white blood cells are separated from the plasma. The blood cells are then returned to the body. The plasma portion of the blood that is removed is thought to contain elements that play a part in the improper functioning of the immune response. Plasma-pharesis tends to reduce the severity and duration of the symptoms for reasons that are not totally understood. It is found to be most beneficial when used early in the course of the disorder.