Pilbeam's Mechanical Ventilation 7th Edition by James M. Cairo
PhD RRT FAARC || ALL CHAPTERS ||VERIFIED ANSWERS||GURANTEE PASS
7th Edition
, Chapter 1; Basic Terms And Concepts Of
Mechanical Ventilation
MULTIPLE CHOICE
1. The Body’s Mechanism For Conducting Air In And Out Of The Lungs Is Known
As Which Of The Following?
A. External Respiration
B. Internal Respiration
C. Spontaneous Ventilation
D. Mechanical Ventilation
CORRECT ANS>>C
The Conduction Of Air In And Out Of The Body Is Known As Ventilation. Since
The Question Asks For The Body’s Mechanism, This Would Be Spontaneous
Ventilation. External Respiration Involves The Exchange Of Oxygen (O2) And
Carbon Dioxide (CO2) Between The Alveoli And The Pulmonary Capillaries.
Internal Respiration Occurs At The Cellular Level And Involves Movement Of
Oxygen From The Systemic Blood Into The Cells.
DIF: 1 REF: Pg. 3
2. Which Of The Following Are Involved In External Respiration?
A. Red Blood Cells And Body Cells
B. Scalenes And Trapezius
Muscles
C. Alveoli And Pulmonary
Capillaries
D. External Oblique And
Transverse Abdominal Muscles
CORRECT ANS>>C
External Respiration Involves The Exchange Of Oxygen And Carbon Dioxide
(CO2) Between The Alveoli And The Pulmonary Capillaries. Internal Respiration
Occurs At The Cellular Level And Involves Movement Of Oxygen From The
Systemic Blood Into The Cells.
Scalene And Trapezius Muscles Are Accessory Muscles Of Inspiration. External
Oblique And Transverse Abdominal Muscles Are Accessory Muscles Of
Expiration.
, DIF: 1 REF: Pg. 3
3. The Graph That Shows Intrapleural Pressure Changes During Normal
Spontaneous Breathing Is Depicted By Which Of The Following?
A.
B.
C.
D.
CORRECT ANS>>B
During Spontaneous Breathing The Intrapleural Pressure Drops From About -
5 Cm H2O At End-Expiration To About -10 Cm H2O At End-Inspiration. The
Graph Depicted For Answer B Shows That Change From -5 Cm H2O To -10
Cm H2O.
DIF: 1 REF: Pg. 4
4. During Spontaneous Inspiration Alveolar Pressure (PA) Is About:
.
A. - 1 Cm H2O
B. + 1 Cm H2O
C. 0 Cm H2O
D. 5 Cm H2O
CORRECT ANS>>A
-1 Cm H2O Is The Lowest Alveolar Pressure Will Become During Normal
Spontaneous Ventilation. During The Exhalation Of A Normal Spontaneous
Breath The Alveolar Pressure Will Become +1 Cm H2O.
DIF: 1 REF: Pg. 3
5. The Pressure Required To Maintain Alveolar Inflation Is Known As Which Of
The Following?
A. Transairway Pressure (PTA )
B. Transthoracic Pressure (PTT)
C. Transrespiratory Pressure (PTR)
, D. Transpulmonary Pressure (PL)
CORRECT ANS>>D
The Definition Of Transpulmonary Pressure (PL) Is The Pressure Required To
Maintain Alveolar Inflation. Transairway Pressure (PTA ) Is The Pressure Gradient
Required To Produce Airflow In The Conducting Tubes. Transrespiratory
Pressure (PTR) Is The Pressure To Inflate The Lungs And Airways During Positive
Pressure Ventilation. Transthoracic Pressure (PTT) Represents The Pressure
Required To Expand Or Contract The Lungs And The Chest Wall At The Same
Time.
DIF: 1 REF: Pg. 3
6. Calculate The Pressure Needed To Overcome Airway Resistance During Positive
Pressure Ventilation When The Proximal Airway Pressure (Paw) Is 35 Cm H2O
And The Alveolar Pressure (PA) Is 5 Cm H2O.
A. 7 Cm H2O
B. 30 Cm H2O
C. 40 Cm H2O
D. 175 Cm H2O
CORRECT ANS>>B
The Transairway Pressure (PTA ) Is Used To Calculate The Pressure Required To
Overcome Airway Resistance During Mechanical Ventilation. This Formula Is
PTA = Paw - PA.
DIF: 2 REF: Pg. 3
7. The Term Used To Describe The Tendency Of A Structure To Return To Its
Original Form After Being Stretched Or Acted On By An Outside Force Is Which
Of The Following?
A. Elastance
B. Compliance
C. Viscous Resistance
D. Distending Pressure