: belonging only to the person or group specified. 1  She has the sole authority to hire new staff members. [=only she can hire new staff members] 2  He has sole jurisdiction of the area.
Dr. Stern responded: Dead space in lung. Dead space is a term used to describe an area of the lung where gas exchange cannot occur - it does not mean dead lung tissue. Everyone has dead space and it is comprised mainly of your airways. It is measured as a percentage. Dead space is affected by many variables including the size of the breath we inhale.
Furthermore, the air in the conducting airways doesnât contribute to gas exchange at all and constitutes dead space. At rest, with a typical tidal volume VT; the depth of each breath) of around 500 ml, 150 ml is lost in dead space (VD), and the remaining 350 mL is mixed into the much larger 2350 mL existing FRC. So, itâs not a matter of breathing in, exchanging gases and breathing out.