Answer Happy

9.2 for a single mechanical unit lung, assume that the relationship among pressure, volume, and number of moles of ideal gas in the lung is given by PA6%)*-* РА = K NL where a = 1 and K is a constant. Derive the lowest-order (linear) approxima- tion to the relationship among changes in pressure, changes in volume, and changes in moles of gas within the lung
9.7 Assume that the chest-wall static compliance is 0.31 liter/cm H20 and that the pulmonary static compliance is 0.19 liter/cm H20 when the ventilatory system described by Figure 9.2 is at its resting volume (FRC). Evaluate the static compliance for the total respiratory system.
9.12 In an He-dilution experiment, a spirometer is preloaded with 10 liters of 5% He at room temperature, 25 C. After the patient has rebreathed, the He concentration in the spirometer is 4%. What is the FRC? [Assume Ts(t2) = 305 K.)
9.13 In a 1000 liter-body plethysmograph, a 100 liter person blows into a pressure sensor, raising mouth pressure 30 cm H20 (3 kPa). The pressure in the box drops 0.1 cm H2O (10 Pa). Calculate the person's lung volume assuming that ap = 1.4 and that atmospheric pressure is 760 mm Hg (101 kPa).
9.20 Design an experiment that requires no surgery and measures in vivo the mechanical time constant (t =RC) of the lungs of an anesthetized, paralyzed animal (assume normal lungs).
9.20 Design an experiment that requires no surgery and measures in vivo the mechanical time constant (t =RC) of the lungs of an anesthetized, paralyzed animal (assume normal lungs).