Term
| IF THE PATIENT MOVES FROM STANDING TO THE SUPINE POSITION WHICH 2 VOLUMES DON'T CHANGE? |
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Definition
| TIDAL VOLUME AND RESIDUAL VOLUME |
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Term
| IF THE PATIENT MOVES FROM A STANDING TO THE SUPINE POSITION WHICH VOLUME INCREASES AND WHICH VOLUME DECREASES? |
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Definition
| IRV INCREASES AND ERV DECREASES. FRC ALSO DECREASED |
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Term
| COMPLIANCE IS DETERMINED BY WHAT 2 THINGS? |
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Definition
| ELASTIC RECOIL OF THE ALVEOLAR TISSUE AND ELASTIC RECOIL OF THE SURFACE TENSION OF THE FLUID LINING THE ALVEOLI. |
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Term
| THE ELASTIC RECOIL OF THE ALVEOLAR TISSUE IS CAUSED BY WHAT 2 THINGS? |
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Definition
| ELASTIN AND COLLAGEN FIBERS |
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Term
| ELASTIC RECOIL OF THE SURFACE TENSION OF THE FLUID LINING THE ALVEOLI REPRESENT HOW MUCH OF THE TOTAL LUNG ELASTICITY? |
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Definition
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Term
| ALVEOLI DOESN'T COLLAPSE BECAUSE OF WHAT? |
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Definition
| SURFACTANT WHICH DECREASES SURFACE TENSION |
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Term
| WITH THE INSPIRATORY COMPLIANCE CURVE (FRC TO TV) DESCRIBE THE INITIAL, MIDDLE AND END IN RELATION TO ELASTICITY AND COMPLIANCE. |
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Definition
| INITIAL HIGH ELASTICITY AND LOW COMPLIANCE. COMPLIANCE INCREASES AS VOLUME INCREASES UNTIL THE MIDPOINT. HIGHEST AT MIDDLE OF INSPIRATION. AFTER THE MIDPOINT, COMPLIANCE WIL START TO DECREASE. ALVEOLI RESPOND LIKE WHEN YOU BEGIN TO BLOW UP A BALLOON. THE FIRST COUPE OF BREATHS ARE DIFFICULT TO PUSH IN. IN THE MIDDLE THE BREATHS ARE VERY EASY. AT THE END, IT BECOMES HARDER TO PUT THE AIR IN. |
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Term
| WITH THE EXPIRATORY COMPLIANCE CURVE (FRC TO TV) DESCRIBE THE INITIAL, MIDDLE, AND END IN RELATION TO COMPLIANCE AND ELASTICITY. |
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Definition
| INITIALLY HIGH ELASTICITY, LOW COMPLIANCE. COMPLIANCE INCREASE AS VOLUME DECREASES. HGHEST COMPLIANCE IS AT THE MIDPOINT. AFTER MIDPOINT, COMPLIANCE WILL START TO DECREASE AS WE GET CLOSER TO THE X AXIS. |
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Term
| DO WE BREATH FROM FRC TO TV OR FROM RV TO TLC? |
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Definition
| FRC TO TV. THE AMOUNT OF WORK THAT IT WOULD TAKE TO GET FROM RV TO TLC WOULD BE VERY DEMANDING. EX. WHILE SITTING DOWN, IF WE HAD TO SPEND THE NEXT 30 MINUTES BREATHING FROM RV TO TLC, MOST PEOPLE WOULD PASS OUT AFTER A WHILE. |
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Term
| THE ELASTIC RECOIL (ELASTICITY) THAT WE SEE IN THE ALVEOLI HOW MUCH OF THAT IS SURFACE TENSION AND HOW MUCH OF THAT IS TRUE ELASTICITY? |
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Definition
| 2/3 COMES FROM THE SURFACE TENSION. 1/3 COMES FROM THE ELASTICITY. IF IT WAS THE OTHER WAY AROUND, PREMATURE BABIES BORN WITHOUT SURFACTANT WOULDN'T HAVE AS MANY PROBLEMS. |
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Term
| BE DECREASING THE SURFACE TENSION WHAT DO WE DO TO ELASTICITY? |
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Definition
| DECREASE IT. THIS MAKES THE ALVEOLI EASIER TO OPEN. |
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Term
| WHAT IS THE FORMULA FOR LAW OF LAPLACE? WHAT ARE THE VARIABLES? |
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Definition
| P= (2*T)/R P= COLLAPSING PRESSURE T= TENSION R= RADIUS |
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Term
| ACCORDING TO THE LAW OF LAPLACE AS THE RADIUES OF THE ALVEOLI DECREAE WHAT WILL THE PRESSURE OF THE ALVEOLI DO? |
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Definition
| INCREASE. PRESSURE IS INVERSELY PROPORTIONAL TO THE RADIUS. SMALLER ALVEOLI RESULT IN LARGER PRESSURE WHICH END RESULT IS ATELECTASIS |
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Term
| WITH NEONATAL RESPIRATORY DISTRESS SYNDROME WHICH ALVEOLI WILL EXPAND FIRST? |
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Definition
| LARGE ALVEOLI WILL EXPAND FIRST UPON VENTILATION. THE SMALL ONES WILL NOT BEGIN TO OPEN UNTIL THE LARGE ALVEOLI ARE MAXIMALLY INFLATED. |
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Term
| DOES SURFACTANT PREVENT SMALLER ALVEOLI FROM EMPTYING INTO LARGER ALVEOLI? |
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Definition
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Term
| DOES SURFACTANT (DECREASE OR INCREASE) SURFACE TENSION AND (INCREASE OR DECREASE) COMPLIANCE? |
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Definition
| DECREASE, INCREASE. SURFACTANT ALLOWS US TO HAVE ALVEOLI OF UNEQUAL SIZES. |
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Term
| WHICH ALVEOLI ARE LARGER. THE ONES AT TOP OR BOTTOM? |
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Definition
| TOP. AT THE END OF A NORMAL EUPNEIC RESPIRATION, ALVEOLAR PRESSURES AT THE TOP AND BOTTOM OF THE LUNG ARE EUQAL TO ATM. PRESSURE. |
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Term
| AT LOW LUNG VOLUMES DOES THE ALVEOLI HAVE HIGH SURFACE TENSION? |
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Definition
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Term
| WHAT DOES SURFACTANT THICKNESS DO IF THERE IS A DECREASE IN RADIUS? |
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Definition
| AS THE RADIUS DECREASES, THE THICKNESS OF SURFACTANT LINING THE ALVEOLI INCREASES. THIS REDUCES THE SURFACE TENSION. DIFFUSION OF GASES IS REDUCED (BUT IT REMAINS PROPORTIONAL). IF THIS SURFACE TENSION IS REDUCED TO THE SAME AMOUNT AS THE RADIUES IS REDUCED, THE PRESSURE REMAINS THE SAME. |
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