Asked by Larry, New York: I have had severe, chronic back and sciatic pain for many years. My particular problems cannot be resolved surgically. Nerve blocks and other minimally invasive procedures have been partially successful in temporarily reducing the pain. Medications have reduced my back pain, but the sciatic pain continues to be severe. My pain specialist has suggested an implantable nerve stimulator for the sciatic nerve. How successful are these devices?
By: Conditions Expert Dr. Otis Brawley, Chief Medical Officer, American Cancer Society
When symptoms of nonspecific low back pain persist more than three months, the goal of treatment moves from “cure” to controlling pain, maintaining function and preventing disability.
Studies show that many patients with chronic low back pain do not receive evidence-based care. Too often, there is overuse of unproven interventions (such as traction and corsets), over-reliance on opioids and muscle relaxants and underuse of exercise therapy.
Injection of nerve roots with steroids or numbing medications (nerve blocks) generally provide short-term relief and can be done only when the source of the pain is identifiable.
The experts gave the following recommendations for patients with chronic low back pain.
The patient should try to remain active and limit bed rest.
Engaging in supervised exercise therapy that includes stretching and strengthening is an important part of therapy, as is some aerobic activity
Consider yoga, spinal manipulation, massage therapy, cognitive behavioral therapy and acupuncture.
Do not use lumbar supports.
Use nonopioid analgesics such as acetaminophen or nonsteroidal anti-inflammatory drugs.
Only the most severely disabled, with a low vulnerability for drug abuse, should use opioids. Opioids should then be used sparingly for acute exacerbations of back pain.
Avoid use of anti-epileptic medications, muscle relaxants and benzodiazepines such as valium for long-term low back pain.
A nerve generates an electrical signal. In sensory nerves, these signals may communicate pain to the brain. A nerve stimulator is used to cancel out the electrical pain signals in the nerve. The peripheral nerve stimulator is implanted under the skin and is placed to send electrical pulses to the problematic nerve directly.
A very few patients do get relief with implantable nerve stimulators and other treatments such as interferential therapy, low level laser therapy, short-wave diathermy, traction, transcutaneous electrical nerve stimulation (TENS), ultrasound or percutaneous electrical nerve stimulation (PENS).
These treatments are worth a try for people who have not gotten adequate relief from other more established treatments. All the experts I consulted noted that treatment of chronic low back pain is often frustrating and patients going through the experience often develop clinical depression.
They suggested that health care providers and patients be on the lookout for depression and they suggest that it be treated aggressively with antidepressants.
In other words, avoid using drugs that actually do help, and when all the other alternative treatments don’t help, treat chronic back pain with antidepressants. (And good luck.)