Lec 4 - 5 - Ventilation and Perfusion Flashcards
boyle’s law with temp constant
P1V1 = P2V2
law that partial pressure in a gas mixture is the pressure that the gas would exert if it occupied the total volume
dalton’s law
concentration of a gas dissolved in a liquid is proportional to its partial pressure
henry’s law
constant arterial gas composition of PaCO2
40 mmHg
arterial gas composition varies by blank
chemoreceptors
Ve means
expired ventilation (minute ventilation)
Va means
alveolar ventilation
Vd means
dead space ventilation
IMPORTANT: more frequent ventilation causes blank to increase but blank to decrease
dead space ventilation, alveolar ventilation
base of lung has a blank pleural pressure, blank volume, blank compliance
higher, lower, higher
minute ventilation formula
Ve = Vt x f
physiologic dead space is wasted blank
ventilation
a shunt is wasted blank
blood flow
percentage of wasted air equation
Vpd / Vt
Vpd = physiologic dead space Vt = total dead space
pulmonary vascular resistance is blank times blank than system
10, less
increase in height has a blank of blood pressure in pulmonary blood flow
decrease
airflow =
ventilation
blood flow =
perfusion
ventilation perfusion ratio
Va / Q
**both are flows
pulmonary arteries are blank muscular and blank compliant compared to systemic arteries which allows for lower resistance and lower pressure
less, more
arterial hypoxemia has a Po2 less than blank
80
hypoxia has a Po2 less than blank
60
hypercapnia is a Pco2 above blank
40
hypocapnia has a Pco2 less than blank
35
IMPORTANT: increased Pcap leads to heart failure and lung blank
volume increases
decreased Ponc which is a loss of plasma protein which can be caused by these
starvation, toxic shock
