During a Helium (He) Dilution Functional Residual Capacity (FRC) Measurement

question 20

Multiple Choice

During a helium (He) dilution functional residual capacity (FRC) measurement, the technologist first bleeds in 500 ml of He (He Vol) and obtains an initial reading of 4.0% (FiHe) . After equilibration, the second He reading is 3.2% (FfHe) . What is the patient's FRC?

• A) 4450 ml
• B) 3125 ml
• C) 2680 ml
• D) 3670 ml

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Definitions:

Middle Childhood

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