What is the typical maximum expiratory pressure value in healthy individuals?

What is the typical maximum expiratory pressure value in healthy individuals?

• A. 80 cm H2O
• B. 160 cm H2O
• C. 4.8 L
• D. 83%

Answer: (B)

Maximum expiratory pressure shows how forcefully the expiratory muscles can push against a closed airway, and in healthy adults the typical maximum is around 160 cm H2O. This value reflects normal strength of the expiratory muscles and the ability to generate substantial压力 to expel air. The other options don’t fit because they aren’t units of pressure or aren’t pressures at all: 80 cm H2O is lower than the common maximum, 4.8 L is a volume, and 83% is a percentage of predicted value rather than an absolute pressure.

Maximum expiratory pressure shows how forcefully the expiratory muscles can push against a closed airway, and in healthy adults the typical maximum is around 160 cm H2O. This value reflects normal strength of the expiratory muscles and the ability to generate substantial压力 to expel air. The other options don’t fit because they aren’t units of pressure or aren’t pressures at all: 80 cm H2O is lower than the common maximum, 4.8 L is a volume, and 83% is a percentage of predicted value rather than an absolute pressure.