Does rib torque assist resting tidal expiration or most conversational speech expiration?
An alternate conceptualization is offered that is consistent with knowledge from respiratory biomechanics.
The difference in LVM between untreated and treated patients support the validity of the WHO-ISH guidelines, but the measurement of LVM did not bring much information for managing the individual patient. Application of these guidelines did not satisfactorily identify high risk patients and could lead to over-treatment of low risk patients.