By ALLAN KOAY
The elderly do not just fall because of obstacles in their way.
IT IS commonly thought that when the elderly falls, it is caused by obstacles or hazards in their way, be they toys, pets, wires, cables or curtains. But studies have shown that there may be more to it than meets the eye.
There are other causes that may not be as apparent, such as problems with gait, balance and muscle function that come with age and affects those above 65.
Dr Erich Schacht: ‘Patients above 65 years of age have a reduction in neuromuscular coordination. In principal, they face a risk of falls.’
According to studies, about one-third of those aged above 65 experience one or more falls per year, and 90% of all non-vertebral fractures are from falls.
In the Rotterdamn Study, 20.7% of men and 44.1% of women with non-vertebral fractures had osteoporosis, and that suggests that low bone-mineral density may be less important in predicting non-vertebral fractures in the elderly. Rather, it is found that a combination of loss of bone strength and increased risk of falls that leads to osteoporosis-related fractures. Therefore preventing falls means preventing fractures.
“In the last decade, we were only talking about bones in osteoporosis – bone mass loss, bone strength loss, and bone quality loss,” said Dr Erich Schacht, an osteology and rheumatology expert from Switzerland who was recently in Kuala Lumpur to give a talk on the new drug alfacacidol that can help to prevent falls.
“In the elderly, there is another problem, which is that patients above 65 years of age have a reduction in neuro-muscular coordination – in muscle power or balance. In principal, they face a risk of falls.”
He concurred that more than 90% of hip fractures are caused by falls. Because the elderly have less muscle and fat, they have less protection at the hips. And because of neuro-muscular deficiency, they have slower or no reaction when they fall. And if they fall on an osteoporotic bone, the chance of the bone breaking is higher.
“There’s also a difference in the way young people fall and the way the elderly do,” said Dr Schacht. “The younger people more commonly fall to the front, and they have their arms in front of them to stop the fall. The elderly tend to fall sideways or backwards, and without reaction.
The loss of mobility, which increases with age, is a major threat to growing old successfully.
“The elderly have less possibility to react because of some changes in their bodies. Some types of muscle fibres which are responsible for fast reaction decrease in people with age.”
Dr Schacht said that while bone measurements are still very important in the field of osteoporosis, fall-risk assessment is also needed. There are different tests that can be carried out to determine if a person faces the risk of falling.
“Only when we have both (bone measurements and falls assessment), can we calculate an individual’s real risk of hip fracture,” he added.
“Just measuring the bone-mineral density is not enough. It has been shown in the last few years, from big studies, that more than 50% of hip fracture patients didn’t have osteoporosis. Why did they have hip fractures? Because not only the bone mass, but also the bone structure and quality are negatively changed.”
The tests to assess a person’s risk of falling include the lower extremity test where a person is asked to stand with feet close together for 10 seconds, then stand with the heel of one foot in line and touching the toe of the other foot. Those who cannot stand in this way for more than 10 seconds have a risk of falling.
Another is the timed up-and-go test. A person sits in a chair of normal height, gets up and walks 3m, and then walks back and sits down again. If she or he takes more than 12 seconds to do it, then there is a risk of falling.
Then there is the gait velocity test, where a person is required to walk normally for 4m, and if the she or he walks less than one metre per second, it shows a high risk of functional decline, which is related to falls and fractures.
But Dr Schacht said it is not all just about the bones, as bones and muscles are a unit. If you don’t use your muscles, you also lose your bones.
“You see it in hospitals with bed-ridden patients, or in space where astronauts lose muscle mass and then bone mass,” he explained.
Correction of vision and minimising the dosage of drugs combined with muscle, gait and balance training such as tai chi, can help to prevent falls.
“So the muscle is responsible for the bone’s growth. Therefore a drug that affects both muscle and bone can positively influence bone strength and reduce falls.”
Such a drug is already being introduced. Called alfacalcidol, the drug has been shown in tests to greatly reduce falls in a community of men and women with a total calcium intake of more than 500mg a day and normal vitamin D serum levels.
Alfacalcidol is a D-hormone analog that works simultaneously in the parathyroid hormone, immune system, intestine, bone muscle and nerves.
“Muscle growth, and muscle differentiation and maturation can be controlled by this drug,” said Dr Schacht.
He said alfacalcidol has been shown to influence the fall-risk assessment tests.
“Studies have shown that if you cannot do these tests within the stipulated time, in 10 years, you will have a 60% risk of getting a hip fracture,” said Dr Schacht. “But if a patient uses alfacalcidol, there is a reduction of two seconds in the performance of these tests.
Ultimately it is the loss of mobility, which increases with age, that is a major threat to growing old successfully. Mobility impairment is what leads to gait and balance problems, and coupled with vision and cognitive impairment, increases the risk of falls.
Correction of vision and minimising the dosage of drugs combined with muscle, gait and balance training such as tai chi, can help to prevent falls.
“The elderly don’t do sports like young people,” said Dr Schacht. “There is no specific rehabilitation programmes for muscles and bones. But the only thing I can recommend, which has been validated, is tai chi. And it’s not only working in Asia, it’s working for American housewives as well.”
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