Before electroencephalography, a client asks, "Why will I be asked to take deep breaths during the procedure?" How does the nurse respond?
a. "Hyperventilation causes cerebral vasodi-latation and increases the likelihood of seizure activity."
b. "Hyperventilation causes cerebral vaso-constriction and increases the likelihood of seizure activity."
c. "Deep breathing will keep you relaxed and will lower the seizure threshold."
d. "Deep breathing will make you hypox-emic, which lowers the seizure threshold."
B
Hyperventilation produces cerebral vasoconstriction and alkalosis, which increases the likelihood of seizure activity. The client is asked to breathe deeply 20 to 30 times for 3 minutes. The other responses are not appropriate.
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