Does collapsed lung (in pneumothorax) contain ANY air?

[mhco]

Apologies if this is a dumb question. But can someone just check I am understanding pneumothorax correctly.

I understand that intrapelural pressure = intralveolar pressure in pneumothorax. Tf the lung is not completely collapsed right? It has some air in it, depending on the pressure gradient between atmospheric pressure and intralveolar + intrapleural pressure, right?

Thanks in advance for your help.

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[TUVIX]

Yes it does.