What is the tidal volume for PBW 70 kg at 6 mL/kg?

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Multiple Choice

What is the tidal volume for PBW 70 kg at 6 mL/kg?

Tidal volume is set using predicted body weight (PBW) with a lung-protective target around 6 mL per kilogram. For a PBW of 70 kg, multiplying 70 by 6 mL/kg gives 420 mL. So the tidal volume should be 420 mL. The other numbers don’t fit because they would correspond to per-kg values different from 6 mL/kg (390 mL is about 5.57 mL/kg, 450 mL is about 6.43 mL/kg, 400 mL is about 5.71 mL/kg), not the specified 6 mL/kg.

Tidal volume is set using predicted body weight (PBW) with a lung-protective target around 6 mL per kilogram. For a PBW of 70 kg, multiplying 70 by 6 mL/kg gives 420 mL. So the tidal volume should be 420 mL.

The other numbers don’t fit because they would correspond to per-kg values different from 6 mL/kg (390 mL is about 5.57 mL/kg, 450 mL is about 6.43 mL/kg, 400 mL is about 5.71 mL/kg), not the specified 6 mL/kg.

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