Pulmonary Physiology Topics Flashcards
At rest the Pa is equal to ___
Pb (atm)
During inhalation the pressure drops in the alveoli causing ___ to be greater than Pa. This allows air to rush in.
Pb
Obstructive Lung Disease does what to work?
Restrictive Forces Change
Define the Resistance equation
R= 8nl/r^4
___ is the pressure between the visceral and parietal pleura.
Intrapleural Pressure
At the end of inhalation the intrapleural pressure is
-8
What is the normal PiO2
150mmHg
Define FiO2
Percentage of O2 participating in gas exchange
What Does AEC of the Pressure Volume Loop measure?
Lung Complianace
Increase of air flow resistance does what to respiratory rate?
Decreases RR
What does an increase in eleastic resistance do to respiratory rate?
Increases Respiratory Rate
What does the Loop Represent?
Work to overcome of non elastic forces (resistive forces)
How do you calculate the minute ventilation
Ve = Vt X f
Restictive Lung Disease changes what kind of work? (
Changes Elastic Work
At rest the intrapleural pressure is
-5
Define PiO2
Partial Pressure of inspired O2
Define Interdependence
Alveoli hold each other together
What is the function of B2 Adrenergic Receptors
Bronchodilator Increase the radius which decreases the Resistance
What Does 0AECD0 measure ?
Work of Breathing due to elastic forces
How do you calculate Minute Alveolar Ventilation
V.AVL = Vavl * f
Describe how an decrease in alveoli could lead to Lung Collapse.
Decreased Alveoli –> Decreased Forces countering elastic recoil –> Collapse –> Increased air resistance
what is the normal FiO2
21%
Define Transpulmonary Pressure
Pressure across lung tissue that opposes inward elastic recoil
