PBW for a 180 cm tall male is approximately what?

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PBW for a 180 cm tall male is approximately what?

PBW is the predicted lung size-based weight used to guide ventilator settings, so it reflects how large the lungs are rather than how much a person weighs overall. For males, PBW is calculated with the height-based formula: PBW = 50 + 0.91 × (height in cm − 152.4). Plugging in 180 cm: height minus 152.4 equals 27.6 cm. Multiply by 0.91 to get about 25.1 kg. Add 50 kg and you get roughly 75.1 kg. This value best matches the option around 75 kg. This approach matters because using actual body weight can misrepresent lung size in people who are very overweight or underweight, whereas PBW provides a more accurate basis for ventilator tidal volumes (for example, typically about 6 ml/kg PBW).

PBW is the predicted lung size-based weight used to guide ventilator settings, so it reflects how large the lungs are rather than how much a person weighs overall. For males, PBW is calculated with the height-based formula: PBW = 50 + 0.91 × (height in cm − 152.4).

Plugging in 180 cm: height minus 152.4 equals 27.6 cm. Multiply by 0.91 to get about 25.1 kg. Add 50 kg and you get roughly 75.1 kg. This value best matches the option around 75 kg.

This approach matters because using actual body weight can misrepresent lung size in people who are very overweight or underweight, whereas PBW provides a more accurate basis for ventilator tidal volumes (for example, typically about 6 ml/kg PBW).

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