Which respiratory system manifestation indicates a possible state of alkalosis that a nurse should assess for?

• A. High blood pressure
• B. Decreased ventilation
• C. Increased heart rate
• D. Elevated body temperature

Answer: (B)

A manifestation of decreased ventilation is most indicative of a possible state of alkalosis due to respiratory factors. In respiratory alkalosis, there is an excessive loss of carbon dioxide (CO2) leading to an increase in blood pH. This condition can occur when a patient is hyperventilating, and thus, decreased ventilation can suggest that the body is attempting to retain CO2 to correct the alkalosis.

When assessing a patient's respiratory function, nurses observe the rate and depth of breathing. If ventilation is decreased, it may be an effort to compensate for the alkalotic state by retaining CO2, thereby lowering the pH back toward normal. Additionally, decreased ventilation can lead to respiratory acidosis over time, further complicating the patient's condition.

The other options, while they may be associated with various cardiovascular or systemic factors, do not specifically indicate respiratory alkalosis. High blood pressure, increased heart rate, and elevated body temperature can result from a variety of conditions but do not provide as direct an indication of alkalosis as assessing ventilation is crucial in understanding the respiratory status and underlying acid-base balance.