Physiology- Gas transfer Flashcards
in hypoxic hypoxia with hypercapnoea what is impaired
a. transfer
b. ventilation
b.ventilation
in hypoxic hypoxia without hypercapnoea what is impaired
a. transfer
b. ventilation
a.transfer
o2 therapy is safe in which scenario
a. hypoxic hypoxia with hypercapnia
b. hypoxic hypoxia without hypercapnia
b.hypoxic hypoxia without hypercapnia
what is the equation for pulmonary vascular resistance
a. perfusion pressre x CO
b. CO/perfusion pressure
c. perfusion pressure/CO
c. perfusion pressure/CO
What does pulmonary MAP - pulmonary venous pressure give
a. cardiac output
b. perfusion pressure
c. pulmonary vascular resistance
c.pulmonary vascular resistance
the rate of blood flow through bronchial circulation is..
a. small
b. large
a.small
the vascular resistance in the bronchial vessels is
a. high
b. low
a.high
what are the 3 components of gas transfer
- diffusion through alveolo-capillary membrane
- reaction with blood
- matching V and Q
partial pressure gradient x surface area x solubility in water / membrane thickness x sqrt. molecular weight
gives what according to ficks principle
a. flow
b. rate of diffusion
c. ventilation
b.rate of diffusion
what happens to pulmonary vessels as a result of V/Q mismatch
a. hypoxic pulmonary vasodilation
b. hypoxic pulmonary vasoconstriction
b.hypoxic pulmonary vasoconstriction
whats the correct order of events in pulmonary vessels
a. dead space, v/q mismatch, shunt
b. shunt,v/q mismatch,dead space
c. v/q mismatch , shunt, dead space
a.dead space, v/q mismatch, shunt
what test is done to measure the capacity of the lungs to transfer gases
a. heliu dilution
b. single breath carbon monoxide
b.single breath carbon monoxide
