Medical Mondays | NEWS NOTES
Monday, November 19, 2012
TOPIC: Rheumatoid & Osteoarthritis
Elizabeth Lyons, MD | rheumatologist
SAINT THOMAS HOSPITAL
news notes via www.webmd.com
Rheumatoid Arthritis Overview
What Is Rheumatoid Arthritis?
Arthritis is a general term that means inflammation in a joint. Joint inflammation is characterized by redness, warmth, swelling, and pain within the joint.
Rheumatoid arthritis is a type of chronic arthritis that typically occurs in joints on both sides of the body (such as hands, wrists, or knees). This symmetry helps distinguish rheumatoid arthritis from other types of arthritis.
In addition to affecting the joints, rheumatoid arthritis may occasionally affect the skin, eyes, lungs, heart, blood, or nerves.
What Are the Symptoms of Rheumatoid Arthritis?
Symptoms of rheumatoid arthritis include:
Rheumatoid arthritis affects everyone differently. For some, joint symptoms develop gradually over several years. In others, rheumatoid arthritis may progress rapidly, while other people may have rheumatoid arthritis for a limited period of time and then enter a period of remission.
Who Gets Rheumatoid Arthritis?
Rheumatoid arthritis is an autoimmune disorder that affects about 1% of the U.S. population. While it is two to three times more common in women than in men, men tend to be more severely affected when they get it. It usually occurs in middle age; however, young children and the elderly also can develop rheumatoid arthritis.
What Causes Rheumatoid Arthritis?
The exact cause of rheumatoid arthritis is unknown, but it is thought to be due to a combination of genetic, environmental, and hormonal factors. With rheumatoid arthritis, something seems to trigger the immune system to attack the joints and sometimes other organs. Some theories suggest that a virus or bacteria may alter the immune system, causing it to attack the joints. Other theories suggest that smoking may lead to the development of rheumatoid arthritis.
Research hasn't completely determined exactly what role genetics plays in rheumatoid arthritis. However, some people do seem to have a genetic or inherited factor that increases their chance of developing rheumatoid arthritis.
How Does Rheumatoid Arthritis Affect the Body?
Once the immune system is triggered, immune cells migrate from the blood into the joints and joint-lining tissue, called synovium. There the immune cells produce inflammatory substances that cause irritation, wearing down of cartilage (cushioning material at the end of bones), and swelling and inflammation of the joint lining. As the cartilage wears down, the space between the bones narrows. If the condition worsens, the bones could rub against each other.
Inflammation of the joint lining causes excessive fluid with the joint. As the lining expands, it may erode the adjacent bone, resulting in bond damage.
All of these factors cause the joint to become very painful, swollen, and warm to the touch.
How Is Rheumatoid Arthritis Diagnosed?
The diagnosis of rheumatoid arthritis is based on a combination of factors, including:
Most, but not all, people with rheumatoid arthritis have the rheumatoid-factor (RF) antibody in their blood. Rheumatoid factor may sometimes be present in people who do not have rheumatoid arthritis (other diseases can also cause the rheumatoid factor to be produced in the blood). Therefore, the diagnosis of rheumatoid arthritis is based on a combination of joint abnormalities, as well as test results.
A newer, more specific blood test for rheumatoid arthritis is the cylic citrulline antibody test, also called anti-CCP. The presence of anti-CCP antibodies suggests a tendency toward a more aggressive form of rheumatoid arthritis.
People with rheumatoid arthritis may have mild anemia. Blood tests may also reveal an elevated erythrocyte sedimentation rate (ESR) or elevated C-reactive protein (CRP) levels, which are markers of inflammation.
Some people with rheumatoid arthritis may also have a positive antinuclear antibody test (ANA), which indicates the presence of an autoimmune disorder -- whether it is rheumatoid arthritis or another autoimmune disease.
How Is Rheumatoid Arthritis Treated?
There are many different ways to treat rheumatoid arthritis. Treatments include medications, rest and exercise, and surgery to correct damage to the joint.
The type of treatment will depend on several factors, including the person's age, overall health, medical history, and severity of the arthritis.
Rheumatoid Arthritis Medications
There are many rheumatoid arthritis medications available to decrease joint pain, swelling, and inflammation. Some of these drugs prevent or minimize the progression of the disease.
Drugs that offer relief of arthritis symptoms (joint pain, stiffness, and swelling) include:
There are also many strong medications called disease-modifying anti-rheumatic drugs (DMARDs), which work by interfering with or suppressing the immune system's attack on the joints. They include:
Why Are Rest and Exercise Important for Rheumatoid Arthritis?
A balance of rest and exercise is important in treating rheumatoid arthritis. During flare-ups (worsening of joint inflammation), it is best to rest the joints that are inflamed. This may be accomplished by the temporary use of a cane or joint splints.
When joint inflammation is decreased, guided exercise programs are necessary to maintain flexibility of the joints and to strengthen the muscles that surround the joints. Range-of-motion exercises should be done regularly to maintain joint mobility.
When Is Surgery Necessary for Rheumatoid Arthritis?
When joint damage from the rheumatoid arthritis has become severe or pain is not controlled with drugs, surgery may be an option to help restore function to a damaged joint.
Can Rheumatoid Arthritis Be Cured?
Although there isn't a cure for rheumatoid arthritis, early, aggressive treatment has been shown to help prevent disability.
What Is Osteoarthritis?
Arthritis is a general term that means inflammation of the joints. Osteoarthritis, commonly known as wear and tear arthritis, is the most common type of arthritis. It is associated with a breakdown of cartilage in joints and can occur in almost any joint in the body. It commonly occurs in the weight bearing joints of the hips, knees, and spine. It also affects the fingers, thumb, neck, and large toe. Osteoarthritis -- also called OA -- usually does not affect other joints unless previous injury or excessive stress is involved.
Cartilage is a firm, rubbery material that covers the ends of bones in normal joints. Its main function is to reduce friction in the joints and serve as a "shock absorber." The shock-absorbing quality of normal cartilage comes from its ability to change shape when compressed (flattened or pressed together).
Osteoarthritis causes the cartilage in a joint to become stiff and lose its elasticity, making it more susceptible to damage. Over time, the cartilage may wear away in some areas, greatly decreasing its ability to act as a shock absorber. As the cartilage deteriorates, tendons and ligaments stretch, causing pain. If the condition worsens, the bones could rub against each other.
Who Gets Osteoarthritis?
Osteoarthritis affects an estimated 27 million Americans. The chance of developing the disease increases with age. Most people over age 60 have osteoarthritis to some degree, but its severity varies. Even people in their 20s and 30s can get osteoarthritis. In people over 50, more women than men have osteoarthritis.
What Are the Symptoms of Osteoarthritis?
Symptoms of osteoarthritis most often develop gradually and include:
What Causes Osteoarthritis?
There are several factors that increase a person's chances of developing osteoarthritis. These include:
How Is Osteoarthritis Diagnosed?
The diagnosis of osteoarthritis is based on a combination of the following factors:
Your doctor may use X-rays to help confirm the diagnosis and make sure you don't have another type of arthritis. X-rays show how much joint damage has occurred. An MRI may be necessary to get a better look at the joint and surrounding tissues if the X-ray results do not clearly point to arthritis or another condition.
Sometimes blood tests will be given to determine if you have a different type of arthritis.
If fluid has accumulated in the joints, your doctor may remove some of the fluid (called joint aspiration) for examination under a microscope to rule out other diseases.
How Is Osteoarthritis Treated?
Osteoarthritis usually is treated by a combination of treatments, including exercise, weight loss if needed, medications, physical therapy with muscle strengthening exercises, hot and cold compresses to the painful joint, removal of joint fluid, injection of medications into the joint, and use of supportive devices such as crutches or canes. Surgery may be helpful to relieve pain when other treatment options have not been effective.
The type of treatment will depend on several factors including your age, activities and occupation, overall health, medical history, location of your osteoarthritis, and severity of the condition.
How Does Weight and Exercise Impact Osteoarthritis?
Staying at your recommended weight helps prevent osteoarthritis of the knees, hips, and spine, reduces the stress on these weight-bearing joints, and reduces pain in joints already affected. Once you have osteoarthritis, losing weight also can relieve the stress and pain in your knees.
Exercise is important to improve joint movement and to strengthen the muscles that surround the joints. Gentle exercises, such as swimming or walking on flat surfaces, are recommended because they are less stressful on your joints. Avoid activities that increase joint pain, such as jogging or high impact aerobics. Exercises that strengthen the muscles reduce pain in patients with osteoarthritis, particularly with osteoarthritis of the knee.
What Medications Are Used to Treat Osteoarthritis?
The first step with medication is often over-the-counter pain relievers as needed. These include acetaminophen (Tylenol), ibuprofen (Advil, Motrin), and naproxen (Aleve). Don't take over-the-counter medications for more than 10 days without checking with your doctor. Taking them longer than that increases the chance of side effects. If over-the-counter treatments aren't effective, your doctor may decide to prescribe a stronger anti-inflammatory drug or other medication to help ease the pain. Some medications in the form of creams, rubs, or sprays may be applied over the skin of affected areas to relieve pain. For some people with persistent pain despite these pills or creams, steroids can be injected directly into the joint. These injections can be given several times a year, though some experts believe this may ultimately accelerate joint damage.
Injections of hyaluronic acid directly into the knee joint can relieve pain in some people with osteoarthritis.
When osteoarthritis pain is severe and other treatments are not working, some doctors will give stronger pain pills, such as narcotics.
Unfortunately, none of these will reverse or slow the progression of joint damage caused by osteoarthritis.
Are There Alternative Treatments for Osteoarthritis?
While recent research has questioned their usefulness, some medical research has shown that the supplements glucosamine and chondroitin may relieve pain in some people with osteoarthritis, especially in the knee. There is no evidence that glucosamine can help rebuild cartilage. SAMe is another supplement with potential benefits for osteoarthritis. In fact, some research has shown it may be as effective an anti-inflammatory drugs. Remember to always let your doctor know about any supplements you're taking as they can have side effects and interact with medications.
Acupuncture has also been shown to provide significant and immediate pain relief in some people with osteoarthritis.
What Supportive Devices Are Available to Help With Osteoarthritis?
Supportive or assistive devices can help to decrease pressure on the joints with osteoarthritis. Knee supports may be helpful for some people to stabilize the ligaments and tendons and decrease pain. Canes or crutches may be helpful to take pressure off certain joints.
In addition to pain relief, assistive devices improve function and prevent falls. A licensed physical therapist or other health care professional is needed to recommend what devices are best for you.
There are also many available devices to help you perform routine daily activities that may be difficult, such as housework or cooking. Ask your doctor about talking to an occupational therapist to give you ideas about which devices may help.
Is There a Surgery for Osteoarthritis?
When osteoarthritis pain is not controlled with other treatments, or when the pain prevents you from participating in your normal activities, you may want to consider surgery.
There are several types of surgery for osteoarthritis. They include:
Joint fusion to remove the damaged joint and fuse the two bones on each side of the joint. This is done mor