Question

The next five questions go together. 12. When analyzing ventilation and respiratory gases, it is necessary to allow for the effects of temperature, pressure, and humidity on gas volumes. Three sets of conditions are particularly interesting: : ambient temperature and pressure, saturation with water vapor at ambient temperature (as in a spirometer or Douglas bag) BTPS: body temperature, alveolar gas pressure (taken as ambient), saturation with water vapor at body temperature. STPD: standard temperature (0°C, 273 K) and pressure (760 mmHg), dry. Based on the ideal gas law, for two conditions (denoted 1 & 2): (P1 -P10120)V1/Ti (P2- P2(420)V2/T2, where V is volume and P is pressure. For converting between VBTPs and VSTPD. the preceding equation yields the following formula, in which body temperature is take as 37°C and the corresponding water vapor pressure is 47 mmHg. The total pressure in the alveoli is taken as the ambient pressure, Ps, also in mmHg. VSTPD / VBTPS = (PB-47) × 273 / 760 × (273 + 37) = (PB-47) x 0.001 1 59 uerting Vos to Vrpp (i.e., the

Answer 1

ATPT, STPD Tho psesux (孔6,.rrrr 서1) -etolal gas eiSa s na t main cin (166-47)、1.243 STPD STPD