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Geriatric Research, Education and Clinical Center, St. Louis Veteran's Affairs Medical Center, St. Louis, MO, USA. flaherty@slu.edu
Among hospitalized older persons, rates of insomnia are alarmingly high, as is evident by the high rates of use of sedative-hypnotic drugs, ranging from 31% to 88%. Insomnia among hospitalized patients may represent undiagnosed sleep disorders, underlying medical problems, and underlying psychiatric problems. Causes of insomnia can be intrinsic or extrinsic. In the intensive care unit, which is one of the most studied areas of the hospital related to insomnia, most studies using polysomnography monitoring have shown that although sleep times seem normal (about 7&8 hours per night), no patients have normal sleep patterns. There is evidence supporting the use of nonpharmacologic interventions, which are preferable to the use of sedating drugs because of the risk associated with their use.
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