What is the normal respiratory rate in anesthetized adult dogs and cats?

What is the normal respiratory rate in anesthetized adult dogs and cats?

• A. 10-20 brpm
• B. 5-15 brpm
• C. 20-30 brpm
• D. 30-40 brpm

Answer: (A)

Normal respiration under anesthesia for adult dogs and cats is typically around 10 to 20 breaths per minute. Anesthetic agents depress the respiratory drive, so the pattern you see is slower and more regular than in a waking patient. This range indicates adequate ventilation when depth of anesthesia is appropriate. If the rate drops toward the lower end or below, it can signal excessive depth or hypoventilation; if it climbs toward the higher end, it may suggest shallower anesthesia or a compensatory response to CO2 buildup. In practice, you’d also monitor end-tidal CO2 to confirm ventilation is matching metabolic needs, with a target in the roughly 35–45 mmHg range helping validate that the breathing rate is appropriate.

Normal respiration under anesthesia for adult dogs and cats is typically around 10 to 20 breaths per minute. Anesthetic agents depress the respiratory drive, so the pattern you see is slower and more regular than in a waking patient. This range indicates adequate ventilation when depth of anesthesia is appropriate. If the rate drops toward the lower end or below, it can signal excessive depth or hypoventilation; if it climbs toward the higher end, it may suggest shallower anesthesia or a compensatory response to CO2 buildup. In practice, you’d also monitor end-tidal CO2 to confirm ventilation is matching metabolic needs, with a target in the roughly 35–45 mmHg range helping validate that the breathing rate is appropriate.