The nurse would expect to see increased ventilations if a patient exhibits
a. Increased oxygen saturation.
b. Decreased carbon dioxide levels.
c. Decreased pH.
d. Increased hemoglobin levels.
ANS: C
Retained CO2 creates H+ byproducts that lower pH. This sends a chemical signal to increase respiratory rate and would result in increased ventilation. All other options would cause the ventilation rate to normalize or decrease to increase carbon dioxide retention or as the result of delivery of higher levels of oxygen to tissues.
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