Osteoporosis

Osteoporosis falls into one of those medical conditions in which you don't feel anything wrong until there's a problem, but if you develop a problem it's serious and already too late. On the other hand, it's happily also detectable and preventable.

Also known as "brittle bone disease", osteoporosis refers to a loss of bone strength. This does not cause pain in its own right, but it does mean that a simple fall to the ground can result in painful or disabling fractures. We are especially concerned about hip fractures because even though they can be surgically repaired, half of patients who sustain a hip fracture have died or are permanent nursing home residents within the following six months.

On the positive side, there's a lot that can be done to detect osteoporosis early on, and to prevent it from harming you.

Testing can easily be done to detect osteoporosis before fractures or loss of height occur. Indicators of higher risk to have low bone density include:

• smokers
• body weight under 154 pounds
• family history of osteoporosis
• physical inactivity
• alcohol use
• post-menopausal women older than 65, or older than 60 with another risk factor

The most accurate and reliable test for osteoporosis is the DXA (dual X-ray absorptimetry) test. Heel ultrasound is not accurate, and should not be used as the only basis to rule in or rule out osteoporosis. Save your money, if this is offered as part of a low-cost "health screening". (When's the last time you heard of a doctor or ER talk about ordering a bone ultrasound?)

The arm emits a low-dose beam of X-rays through several specific sites such as the wrists, spine and hips. The table can detect how much of that known amount of X-ray is getting through to the table. The more dense your bones are, the less makes it through to the table. Then, a detailed result can be generated showing density of your bones at these various points in comparison to other patients of your age.

Long story short, if your bone density is among the lowest ranking it does actually relate to markedly higher risk of a simple fall resulting in a serious fracture.

If this is the case, then it's a good idea to get proactive about maintaining or improving your bone density in the interests of not sustaining a fracture as well as avoiding loss of height or a humped curvature of the spine (the so-called "widows' hump").

Exercise does help:

• High-impact exercises that involve gravity help to stimulate bone formation (lack of this is why young healthy astronauts develop loss of bone density within a matter of a few weeks in orbit). This would mean running, walking and treadmill as examples. While water aerobics and elliptical trainers are excellent for cardiovascular conditioning, they do not increase bone density.
• Exercise that promotes balance can prevent falls (no fall, no fracture). Tai Chi, yoga and dance are particularly beneficial.

Look at your home:

• Most falls occur in your home; it's were you are most of the time.
• Address things that can result in falls, such as loose carpeting or throw rugs, exposed electrical cords, poor lighting or lack of grab bars in the bathroom.

Make sure you are getting adequate calcium and vitamin D by supplementing. This does not increase bone density once you are over 35 years old, but it does ensure that you are getting enough to maintain normal bone metabolism.

• Calcium carbonate, 600 mg, twice a day
• Vitamin D, 400 International Units, twice a day

Prescription medicines do have a role if your bone density is already in the osteoporotic range, since they not only improve bone density but also reduce the occurrence of fractures. The most effective are the bisphosphonates.

• Fosamax and Alendronate are conveniently once a week.
• Fosamax is now generically available as alendronate.
• Unfortunately, the absorption of once a month and once a year treatments such as Boniva is poor and limits their effectiveness.