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PT1

QuestionAnswer
Define Kinetic Energy & Formula the energy an object possesses at a moving velocity KE=1/2MV^2
Why is early small airway disease often difficult to detect? Small airways contribute a significantly smaller resistance than larger airways.
What is the essential prerequisite for a fluid to flow? pressure gradient
Describe the Bernoulli principle inverse relationship between LWP and velocity for an incompressible fluid flowing through a tube in laminar or streamline fashion.
Define viscosity a fluids resistance to deformity
Describe the law of continuity Based on the law of matter and describes the inverse relationship between the cross sectional area of a tube and the fluid flowing through the tube and the velocity as the fluid remains constant
Write Poiseuille's law The relationship shows the resistance factors: flow= AP(3.14)R^4/8nL AP=change in pressure 3.14=constant pi r=radius to the 4th power 8=constant n=viscosity of the liquid L=liters
If all other factors in Poiseuille's law remained constant except radius and airway resistance, what would be the effect if the radius is doubled? the airway resistance is decreased by 16 fold
Calculate the total flow from an entrainment mask given the FiO2 of 40% and a flowmeter setting of 8L/min 3.2 (but you must show your work)
What is the rationale for helium-oxygen therapy in patients with airway obstruction? Heli-ox is 6 times less dense than room air. So, the LWP is increased and WOB is decreased
On a separate sheet of paper draw a diagram of an entrainment system depicting the venturi principle see page 363 in the book
Calculate Raw given the following information: (include all three steps, and correct units) change in pressure =4cm H2O Flow=2 liters/sec -------------
BONUS**** What is the value for normal Raw (airway resistance)? Include the correct units. 0.6-2.4cm H2O/L/sec
BONUS**** Calculate the PAO2 given the following information: Pb=747 mmHg, PaCO2=58mmHg, FiO2=21% (include the correct units) ---------------
Define Power The rate at which work is done p=w/t
Created by: puppydog23
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