In ml/kg/min, which range corresponds to high-flow in a rebreathing system?

In ml/kg/min, which range corresponds to high-flow in a rebreathing system?

• A. 20-40 ml/kg/min
• B. 40-60 ml/kg/min
• C. 60-100 ml/kg/min
• D. 100-200 ml/kg/min

Answer: (C)

High-flow in a rebreathing system means the amount of fresh gas delivered per kilogram of body weight per minute is high enough to wash out CO2 and maintain stable inspired gas concentrations while still allowing some rebreathing. The typical high-flow range is 60–100 mL/kg/min. This level ensures adequate ventilation and consistent anesthetic gas levels without wasting gas. Flows below this rely more on the patient’s own ventilation and rebreathing, which can lead to CO2 buildup, while much higher flows are usually unnecessary and wasteful. So, 60–100 mL/kg/min best represents the high-flow range.

High-flow in a rebreathing system means the amount of fresh gas delivered per kilogram of body weight per minute is high enough to wash out CO2 and maintain stable inspired gas concentrations while still allowing some rebreathing. The typical high-flow range is 60–100 mL/kg/min. This level ensures adequate ventilation and consistent anesthetic gas levels without wasting gas. Flows below this rely more on the patient’s own ventilation and rebreathing, which can lead to CO2 buildup, while much higher flows are usually unnecessary and wasteful. So, 60–100 mL/kg/min best represents the high-flow range.