,
, Basic Sciences PART 1
Chapter 1
Anesthesia Equipment and Physics
DIRECTIONS (Questions 1 through 90): Each of the questions or incomplete statements in this section is
followed by answers or by completions of the statement, respectively. Select the ONE BEST answer or comple-
tion for each item.
1. 58-year-old patient has severe shortness of breath and “wheezing.” On examination, it is found that the patient has
A
inspiratory and expiratory stridor. Further evaluation reveals marked extrinsic compression of the midtrachea by a
tumor. The type of airflow at the point of obstruction within the trachea is
A. Laminar flow
B. Orifice flow
C. Undulant flow
D. Stenotic flow
E. None of the above
2. oncerning the patient in question 1, administration of 70% helium in O2 instead of 100% O2 will decrease the
C
resistance to airflow through the stenotic region within the trachea because
A. Helium decreases the viscosity of the gas mixture
B. Helium decreases the friction coefficient of the gas mixture
C. Helium decreases the density of the gas mixture
D. Helium increases the Reynolds number of the gas mixture
E. None of the above
3. 56-year-old patient is brought to the operating room (OR) for elective replacement of a stenotic aortic valve. An
A
awake 20-gauge arterial catheter is placed into the right radial artery and is then connected to a transducer located at
the same level as the patient’s left ventricle. The entire system is zeroed at the transducer. Several seconds later, the
patient raises both arms into the air such that his right wrist is 20 cm above his heart. As he is doing this, the blood
pressure (BP) on the monitor reads 120/80. What would this patient’s true BP be at this time?
A. 140/100 mm Hg
B. 135/95 mm Hg
C. 120/80 mm Hg
D. 105/65 mm Hg
E. 100/60 mm Hg
1
, 2 Part 1 Basic Sciences
4. n admixture of room air in the waste gas disposal system during an appendectomy in a paralyzed, mechanically ven-
A
tilated patient under general volatile anesthesia can best be explained by which mechanism of entry?
A. Venous air embolism
B. Positive pressure relief valve
C. Negative pressure relief valve
D. Soda lime canister
E. Ventilator bellows
5. he relationship between intra-alveolar pressure, surface tension, and the radius of an alveolus is described by
T
A. Graham’s law
B. Beer’s law
C. Newton’s law
D. Laplace’s law
E. Bernoulli’s law
6. size “E” compressed-gas cylinder completely filled with N2O contains how many liters?
A
A. 1160 L
B. 1470 L
C. 1590 L
D. 1640 L
E. 1750 L
7. hich of the following methods can be used to detect all leaks in the low-pressure circuit of any contemporary anes-
W
thesia machine?
A. Oxygen flush test
B. Common gas outlet occlusion test
C. Traditional positive-pressure leak test
D. Negative-pressure leak test
E. No test can verify the integrity of all contemporary anesthesia machines
8. hich of the following valves prevents transfilling between compressed-gas cylinders?
W
A. Fail-safe valve
B. Pop-off valve
C. Pressure-sensor shutoff valve
D. Adjustable pressure-limiting valve
E. Check valve
9. he expression that for a fixed mass of gas at constant temperature, the product of pressure and volume is constant is
T
known as
A. Graham’s law
B. Bernoulli’s law
C. Boyle’s law
D. Dalton’s law
E. Charles’ law
10. he pressure gauge on a size “E” compressed-gas cylinder containing O2 reads 1600 psi. How long could O2 be deliv-
T
ered from this cylinder at a rate of 2 L/min?
A. 90 minutes
B. 140 minutes
C. 250 minutes
D. 320 minutes
E. Cannot be calculated
, Basic Sciences PART 1
Chapter 1
Anesthesia Equipment and Physics
DIRECTIONS (Questions 1 through 90): Each of the questions or incomplete statements in this section is
followed by answers or by completions of the statement, respectively. Select the ONE BEST answer or comple-
tion for each item.
1. 58-year-old patient has severe shortness of breath and “wheezing.” On examination, it is found that the patient has
A
inspiratory and expiratory stridor. Further evaluation reveals marked extrinsic compression of the midtrachea by a
tumor. The type of airflow at the point of obstruction within the trachea is
A. Laminar flow
B. Orifice flow
C. Undulant flow
D. Stenotic flow
E. None of the above
2. oncerning the patient in question 1, administration of 70% helium in O2 instead of 100% O2 will decrease the
C
resistance to airflow through the stenotic region within the trachea because
A. Helium decreases the viscosity of the gas mixture
B. Helium decreases the friction coefficient of the gas mixture
C. Helium decreases the density of the gas mixture
D. Helium increases the Reynolds number of the gas mixture
E. None of the above
3. 56-year-old patient is brought to the operating room (OR) for elective replacement of a stenotic aortic valve. An
A
awake 20-gauge arterial catheter is placed into the right radial artery and is then connected to a transducer located at
the same level as the patient’s left ventricle. The entire system is zeroed at the transducer. Several seconds later, the
patient raises both arms into the air such that his right wrist is 20 cm above his heart. As he is doing this, the blood
pressure (BP) on the monitor reads 120/80. What would this patient’s true BP be at this time?
A. 140/100 mm Hg
B. 135/95 mm Hg
C. 120/80 mm Hg
D. 105/65 mm Hg
E. 100/60 mm Hg
1
, 2 Part 1 Basic Sciences
4. n admixture of room air in the waste gas disposal system during an appendectomy in a paralyzed, mechanically ven-
A
tilated patient under general volatile anesthesia can best be explained by which mechanism of entry?
A. Venous air embolism
B. Positive pressure relief valve
C. Negative pressure relief valve
D. Soda lime canister
E. Ventilator bellows
5. he relationship between intra-alveolar pressure, surface tension, and the radius of an alveolus is described by
T
A. Graham’s law
B. Beer’s law
C. Newton’s law
D. Laplace’s law
E. Bernoulli’s law
6. size “E” compressed-gas cylinder completely filled with N2O contains how many liters?
A
A. 1160 L
B. 1470 L
C. 1590 L
D. 1640 L
E. 1750 L
7. hich of the following methods can be used to detect all leaks in the low-pressure circuit of any contemporary anes-
W
thesia machine?
A. Oxygen flush test
B. Common gas outlet occlusion test
C. Traditional positive-pressure leak test
D. Negative-pressure leak test
E. No test can verify the integrity of all contemporary anesthesia machines
8. hich of the following valves prevents transfilling between compressed-gas cylinders?
W
A. Fail-safe valve
B. Pop-off valve
C. Pressure-sensor shutoff valve
D. Adjustable pressure-limiting valve
E. Check valve
9. he expression that for a fixed mass of gas at constant temperature, the product of pressure and volume is constant is
T
known as
A. Graham’s law
B. Bernoulli’s law
C. Boyle’s law
D. Dalton’s law
E. Charles’ law
10. he pressure gauge on a size “E” compressed-gas cylinder containing O2 reads 1600 psi. How long could O2 be deliv-
T
ered from this cylinder at a rate of 2 L/min?
A. 90 minutes
B. 140 minutes
C. 250 minutes
D. 320 minutes
E. Cannot be calculated
