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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Ventilation |
The process that moves gases between the external environment and the alveoli |
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Patm/ Pb |
Atmospheric pressure/ barometric pressure |
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mmHG |
Millimeters of mercury |
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Pressure gradient |
An area with a difference in pressure where gas or liquid moves from high pressure to low pressure |
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Primary principles of ventilation |
The mechanisms of pulmonary ventilation that create a pressure gradient |
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Boyle’s Law |
States that a volume of gas varies inversely proportional to its pressure at constant temperature |
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Driving Pressure |
The pressure difference between two points in a tube or vessel |
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Transrespiratory Pressure (Prs) |
The difference between the barometric pressure (PB) and the alveolar pressure (Palv) |
Prs = Pb - Palv |
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Transmural pressure (Ptm) |
The pressure difference that occurs across the airway wall |
Ptm = Pressure from the outside of the airway (Poaw) - intraairway pressure (Piaw) |
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Transpulmonary Pressure |
The difference between the alveolar pressure and the pleural pressure |
Ptp= Palv - Ppl |
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Trans thoracic pressure (Ptt) |
The difference between the alveolar pressure (Palv) and the body surface pressure (Pbs). |
Ptt = Palv - Pbs |
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Hyperventilation |
increased alveolar ventilation ( produced by any ventilatory pattern that causes an increase in either the ventilatory rate or the depth of breathing) therefore the PaCO2 to decrease |
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Hypoventilation |
decreased alveolar ventilation (produced by any ventilatory pattern that causes a decrease in either the ventilatory rate or the depth of breathing) that causes PaCO2 and therefore the PaCo2 to increase |
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Where do aspirated contents lay in the lung? |
The lower lung, usually the right |
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Where do aspirated contents lay in the lung? |
The lower lung, usually the right |
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State the average pleural pressure at the end of a passive exhalation |
758 mm HG |
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