Respiratory Physiology Flashcards
Respiratory Zones
- Respiratory Bronchioles
- Alveolar ducts
- Alveolar sacs
Generations of airway in respiratory system
23 generations
Formula for Physiologic Dead Space
VD = Tidal Volume x [(PCO2 arterial Blood - PCO2 of mixed expired air) /PCO2 arterial Blood]
Amount of anatomic dead space in normal person
150 ml
Amount of physiologic dead space in a normal person
0 ml
Normal FEV1/FVC ratio
80 percent
Surfactant production starts at what AOG?
24th weeks AOG
Surfactant Maturation begins at what AOG
35th week AOG
Shape of Oxygen dissociation curve
Sigmoidal
O2 Hgb Dissociation Curve
Shift to the RIGHT
- Increased CO2
- Increased 2,3 BPG
- Acidosis (Increased Hydrogen ion)
- Exercise
- Increased temperature
Carbon Monoxide
Shift to the LEFT or RIGHT?
LEFT
Hemoglobin F
Shift to the LEFT or RIGHT?
LEFT
Lung Zones
Zone I
•Local alveolar capillary pressure
Lungs Zone 2
- Local Alveolar capillarysystolic pressure > alveolar air pressure during systole but less than that during diastole
- Intermittent blood flow
Lung Zone 3
- Local alveolar capillary pressure > alveolar air pressure throughout the cycle
- Continuous blood flow
Zone in apex
Zone 2
Zone in Base
Zone 3
Zone seen in supine position throughout the lungs
Zone 3
Zone seen during Exercise throughout the lungs
Zone 3
Zone seen in pulmonary hemorrhage
Zone 1
Zone seen in POSITIVE PRESSURE VENTILATION
Zone 1
Normal V/Q
0.8
Medulla
Dorsal Respiratory Group
- Inspiratory center
- Control BASIC RHYTHM
- Normal Inspiration
Medulla
Ventral Respiratory Group
- Overdrive mechanism during exercise
* Forced Inspiration and Expiration
