Anatomic dead space VD_anat for a 70 kg patient is VD_anat = 2.2 mL/kg. What is VD_anat in mL?

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Anatomic dead space VD_anat for a 70 kg patient is VD_anat = 2.2 mL/kg. What is VD_anat in mL?

Anatomic dead space is the volume of air in the conducting airways that does not take part in gas exchange, estimated as about 2.2 mL per kilogram in adults. For a 70 kg patient, multiply 70 by 2.2 to get 154 mL. So VD_anat = 154 mL. The other numbers would arise from using different per-kilogram values (for example, 3.0 mL/kg would give 210 mL), but with the given 2.2 mL/kg, 154 mL is correct.

Anatomic dead space is the volume of air in the conducting airways that does not take part in gas exchange, estimated as about 2.2 mL per kilogram in adults. For a 70 kg patient, multiply 70 by 2.2 to get 154 mL. So VD_anat = 154 mL. The other numbers would arise from using different per-kilogram values (for example, 3.0 mL/kg would give 210 mL), but with the given 2.2 mL/kg, 154 mL is correct.

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