For a patient to heal from illness or injury, he or she needs restful sleep. A quiet, dimly lit room promotes sleep. Yet, the ICU ward of a busy hospital is seldom quiet or dimly lit.
An article in USA today advises: "Sleep deprivation can result in a decreased production of growth hormone needed for healing." In the ICU (intensive care unit) and, for that matter, most hospital wards, patients are disturbed by flashing lights, ringing phones, staff talking, and all the other hospital noises.
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