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12 Cards in this Set
- Front
- Back
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COMPLIANCE
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1. DISTENSIBLE (STRETCHABLE).
2. EASE WITH WHICH THE LUNG CAN EXPAND. 3. CHANGE IN LUNG VOLUME PER CHANGE IN TRANSPULMONARY PRESSURE. 4. COMPLIANCE IS REDUCED BY FACTORS THAT PRODUCE RESISTANCE TO DISTENSION (EMPHYSEMA). |
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TRANSPULMONARY PRESSURE
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1. PRESSURE DIFFERENCE ACROSS THE WALL OF THE LUNG.
2. INTRAPULMOMARY PRESSURE - INTRAPLEURAL PRESSURE. 3. KEEPS LUNG AGAINST WALL. 4. SHOULD BE A POSITIVE NUMBER. |
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VENTILATION OCCURS AS
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A RESULT IS PRESSURE DIFFERENCES INDUCED BY CHANGES IN LUNG VOLUME.
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INTRAPULMONARY PRESSURE DURING EXPIRATION.
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1. +3mm Hg (DUE TO LACK OF AIR IN INTRPLEURAL SPACE).
2.GREATER THAN ATMOSPHERIC PRESSURE. |
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PHYSICAL PROPERTIES THAT AFFECT LUNG FUNCTION.
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1. COMPLIANCE
2. ELASTICITY 3. SURFACE TENSION. |
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INTRAPULMONARY PRESSURE DURING INSPIRATION.
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1. -3mm Hg
2. less than atmospheric pressure. |
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ELASTICITY
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1. TENDENCY TO RETURN TO INITIAL SIZE AFTER DISTENSION.
2.HIGH CONTENT OF ELASTIN PROTEIN. a. VERY ELASTIC AND RESISTS DISTENSION. b. recoil ability. 3.elastic tension is increased during inspiration and is reduced by recoil during expiration. |
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INTRAPULMONARY PRESSURE
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INTRA-ALVEOLAR PRESSURE
PRESSURE IN THE ALVEOLI |
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LAW OF LaPLACE (SURFACE TENSION).
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PRESSURE IN THE ALVEOLI IS DIRECTLY PROPORTIONAL TO THE SURFACE TENSION AND INVERSELY PROPORTIONAL TO THE RADIUS.
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INTRAPLEURAL PRESSURE.
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PRESSURE IN THE INTRAPLUERAL SPACE.
PRESSURE IS NEGATIVE DUE TO LACK OF AIR. |
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BOYLE'S LAW
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1. CHANGES IN THE INTRAPULMONARY PRESSURE OCCUR AS A RESULT OF CHANGES IN THE LUNG VOLUME.
2.PRESSURE OF GAS IS INVERSELY PROPORTIONAL TO ITS VOLUME. 3. INCREASE IN LUNG VOLUME DECREASES THE INTRAPULMONARY (ALVEOLAR)PRESSURE (AIR GOES IN). 4.DECREASE IN THE LUNG VOLUME INCREASES THE INTRPULMONARY PRESSURE (AIR GOES OUT). |
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SURFACE TENSION
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1. FORCE THAT RESISTS DISTENSION.
2. EXERTED BY FLUID IN THE ALVEOLI. 3. FLUID IS DRIVEN BY NA+ ACTIVE TRANSPORT (OSMOSIS). 4. WATER MOLECULES AT THE SURFACE ARE ATTRACTED TO OTHER WATER MOLECULES. |
