The nurse is caring for a patient in the sleep lab. The nurse recognizes that the patient is in stage 4 NREM from which of the following assessments?
a. The patient awakens easily.
b. Body functions slow.
c. The patient is difficult to awaken.
d. Eyes rapidly move.
ANS: C
Stage 4 NREM is the deepest stage of sleep. The patient is difficult to arouse, vital signs are significantly lower, and this stage lasts about 15 to 30 minutes. Sleep walking and enuresis sometimes occur. Lighter sleep is seen in stages 1 and 2, where the patient awakens easily. In stage 2, body functions slow and REM sleep is characterized by rapid eye movement.
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