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Nov. 10 Lecture
Part 1
31
Nursing
Graduate
11/12/2014

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Term
DURING A NORMAL RESPIRATORY CYCLE WHEN IS THE MAJORITY OF THE TIME SPENT?
Definition
AT END (REST) EXPIRATION POINT
Term
WHAT IS FUNCTIONAL RESIDUAL CAPACITY? WHAT IS AIRFLOW?
Definition
VOLUME IN THE LUNGS AT THE END OF A NORMAL EUPENIC EXPIRATION. RESTING VOLUME. AIRFLOW IS ZERO REGARDLESS OF RESISTANCE
Term
WITH EXPIRATION IS THERE AN INWARD ALVEOLAR ELASTIC RECOIL WHICH IS EQUAL TO THE OUTWARD CHEST WALL ELASTIC RECOIL?
Definition
YES
Term
WHEN IS PULMONARY VASCULAR RESISTANCE AT THE LOWEST POINT?
Definition
IN THE EXPIRATION POINT
Term
WHAT IS TOTAL LUNG CAPACITY? WHEN IS PVR THE HIGHEST?
Definition
AMOUNT OF AIR THAT THE LUNGS CAN HOLD. PVR IS HIGHEST AT TLC
Term
WHAT IS RESIDUAL VOLUME?
Definition
IF WE EXHALE AS MUCH AIR AS POSSIBLE.
Term
THE BODY SPEND MOST OF THE RESPIRATORY CYCLE AT WHICH CAPACITY?
Definition
FUNCTIONAL RESIDUAL CAPACITY. MAKES SENSE THAT PVR IS LOWEST IT CAN POSSIBLY BE DURING THE PHASE THAT LASTS THE LONGEST
Term
DURING THE FRC IS THERE AIRFLOW?
Definition
NO AIRFLOW B/C NO PRESSURE GRADIENT BETWEEN ALVEOLAR AND ATM PRESSURE
Term
FRC IS PROBABLY ___ TIMES AS LONG AS THE ACTIVITY ON INSPIRATION/EXPIRATION.
Definition
2-3
Term
DESCRIBE NEGATIVE PRESSURE VENTILATION.
Definition
MEANS THAT WE ARE LOWERING ALVEOLAR PRESSURE CAUSING A PRESSURE GRADIENT PULLING AIR INTO ALVEOLI. AMOUNT OF AIR THAT COMES IN DEPENDS ON THE PRESSURE GRADIENT.
Term
DURING EUPNEIC INSPIRATION THE FORCE GENERATED BY THE INSPIRATORY MUSCLES CAUSES THE CHEST WALL TO MOVE ___ AND THE DIAPHRAGM TO MOVE ___.
Definition
OUT, DOWN
Term
WITH INSPIRATION AS THE CHEST WALL BEGINS TO MOVE OUT, THE OUWARD ELASTIC RECOIL OF CHEST WALL (DECREASES OR INCREASED)?
Definition
DECREASES
Term
DURING INSPIRATION AS THE CHEST WALL BEGINS TO MOVE OUT, ARE THE ELASTIC RECOIL OF ALVEOLUS (BIGGER OR SMALLER)?
Definition
BIGGER. IF YOU BLOW UP A BALLON TO A LARGER VOLUME, IT WILL WANT TO SNAP BACK IN MORE
Term
DURING INSPIRATION WHAT KIND OF PRESSURES DOES THE INTRAPLEURAL SPACE DO?
Definition
AS THE INTRAPLEURAL SPACE INCREASES THE INTRAPLEURAL PRESSURE DECREASES. EX. -5CMH20 TO -8CMH20
Term
DURING A FORCED INSPIRATION WHAT WILL THE INTRAPLEURAL PRESSURES DROP DOWN TO?
Definition
-23CMH20
Term
ARE THE VISCERAL PLEURA AND PARIETAL PLEURA STUCK TOGETHER?
Definition
YES
Term
DURNG INSPIRATION AS THE CW MOVES OUT WHAT HAPPENS TO THE ALVEOLAR VOLUMES?
Definition
THEY WILL INCREASE. THEY ARE PULLED/SUCKED OPEN. THE ALVEOLAR VOLUME HAS INCREASE SINCE THE ALVEOLAR PRESSURE HAS DECREASED. THIS ALLOWS AIRFLOW SINCE ATM PRESSURE= 0.
Term
AT THE END OF INSIRATION, THE ALVEOLAR PRESSURE = WHAT?
Definition
0 CMH20 OR EQUAL TO ATM PRESSURE.
Term
HOW CAN WE SAY THAT THE PRESSURE IS NOT GING TO CHANGE SINCE THE VOLUME OF THE ALVEOLUS IS LARGER?
Definition
ALVEOLI ARE NOT A CLOSED SYSTEM, THEY DO NOT ADHERE TO BOYLE'S LAW
Term
WHEN WILL INSPIRATION STOP?
Definition
AIR WILL CONTINUE TO ENTER THE LUNDS UNTIL ATM PRESSURE IS = ALVEOLAR PRESSURE. THEN INSPIRATION WILL STOP.
Term
TRANSMURAL PRESSURE IS ALSO KNOWN AS WHAT?
Definition
ALVEOLAR ELASTIC RECOIL. IT IS THE DIFFERENCE BETWEEN ALVEOLAR PRESSURE AND INTRAPLEURAL PRESSURE.
Term
WHEN WILL TRANSMURAL PRESSURE INCREAS? (INSPIRATION OR EXPIRATION)?
Definition
INSPIRATION. MORE ELASTIC INWARD RECOIL DURING INPSIRATION AND AT THE END OF INSPIRATION THAN WHEN WE BEGAN.
Term
WHAT IS THE AVERAGE TRANSMURAL PRESSURE AT END OF INSPIRATION?
Definition
-8
Term
DURING INSPIRATION WHAT WILL THE PRESSURE OF THE ALVEOLUS DO?
Definition
DECREASE
Term
DOES THE PARITEAL PLEURA MOVE WITH THE CHEST WALL?
Definition
YES
Term
AS THE INTRAPLEURAL SPACE INCREASES WHAT DOES THE INTRAPLEURAL PRESSURE DO?
Definition
DECREASE. INTRAPLEURAL SPACE IS SUB-ATMOSPHERIC (AT ALL TIME)
Term
AS THE ALVEOLAR VOLUME INCREASES WHAT HAPPENS TO THE ALVEOLAR PRESSURE?
Definition
IT DECREASES. AIR IS SUCKED IN FASTER AS THE ALVEOLAR PRESSURE FALLS
Term
AS ALVEOLI ARE SEMI-FILLED WITH AIR WHAT HAPPENS TO THE VOLUME THAT COMES IN?
Definition
THE LUNGS PULL IN AIR SLOWER AND SLOWER. AT THE LOWEST POINT OF THE ALVEOLAR PRESSURE CURVE (1 SEC) WE HAVE THE LARGEST PRESSURE GRADIENT BETWEEN ATM PRESSURE AND ALVEOLAR PRESSURE, WHICH WILL GENERATE THE HIGHEST AMOUNT OG AIRFLOW. AS THE PRESSURE GRADIENT DECREASES AND THE ALVEOLAR PRESSURE RETURNS TO ATM PRESSURE, AND THE AIRFLOW DECREASES.
Term
LOOKING AT THE TIDAL VOLUME THE GREATEST CHANGE IN VOLUME PER UNIT TIME (HIGHEST SLOPE) OCCURS WHEN?
Definition
AT 1 SECOND. PULLING AIR IN AT THE FASTEST RATE.
Term
DURING EXHALATION WHAT DOES THE INTRAPLEURAL SPACE AND PRESSURE DO?
Definition
INTRAPLEURAL SPACE DECREASES AND THE INTRAPLEURAL PRESSURE INCREASES
Term
DURING EXPIRATION AS THE ALVEOLAR VOLUME DECREASES WHAT DOES THE ALVEOLAR PRESSURE DO?
Definition
INCREASE
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