Lindsey Jones Practice Questions With Correct Answers |
2025
Which of the following equipment is most helpful at measuring
FRC in a patient who has significant non-ventilated lung spaces?
A. nitrogen analyzer for a nitrogen washout test
B. helium analyzer for a helium dilution test
C. peak flow meter
D. plethysmograph - • The correct answer is : D
• Explanation :
You can determine FRC in three different ways - body box,
nitrogen washout, or helium dilution. If someone has non-
ventilated lung space, nitrogen washout and helium dilution are
not helpful and may be inaccurate. FRC determined by body box
will be higher because it can access non-ventilated lung space
and therefore is more accurate
The respiratory therapist is making a home visit to evaluate an
oxygen-dependent patient. The patient has 3+ pitting peripheral
edema and has not followed the physician's orders to limit fluid
intake. You would expect which of the following hemodynamic
values?
,A. elevated right sided preload with a normal to low right
ventricular after load
B. elevated PCWP with a low cardiac output
C. reduced cardiac index
D. low mean arterial pressure - The correct answer is : A
• • Explanation :
Right-sided preload is another name for CVP (central venous
pressure). Peripheral edema is one of the signs associated with
right heart failure, which results in an elevated CVP with a
normal or low pulmonary artery pressure (PAP), a.k.a. right
ventricular afterload
A ventilator-dependent patient is scheduled for an MRI, which
will require a transport of 90 minutes. The patient is receiving
humidification with a heated- humidification system. A transport
ventilator is available. How should a respiratory therapist assure
that humidification will be provided to the patient during the
MRI procedure?
A. Provide an HME
B. Provide a pass-over humidifier
C. Provide ventilation with a manual resuscitator
D. Use the same humidification system in use on the primary
ventilation - • The correct answer is : A
,• • Explanation :
A heat moisture exchanger (HME) is appropriate for a transport
of only 90 min. Furthermore, the scenario does not suggest that
the patient has thick, retained secretions, therefore an HME may
be applied
Which of the following conditions would benefit most from
polysomnography?
A. obesity with increased day-time sleepiness
B. suspected increased airway resistance
C. congestive heart failure
D. COPD - • The correct answer is : A
• • Explanation :
Polysomnography is another word for sleep study. An obese
patient who has daytime sleepiness would benefit most from
polysomnography. Keep in mind that Polysomnography is the
study of the problem - not the solution. But it must be done for
diagnostic purposes and in order to find the adequate CPAP
setting
Which of the following can accurately be stated about a
widening alveolar-arterial oxygen gradient?
A. improving V/Q mismatch
, B. decreased venous admixture
C. increased intrapulmonary shunting
D. onset of oxygen toxicity - • The correct answer is : C
• Explanation :
A normal alveolar arterial oxygen gradient is below 65 mmHg.
When that gradient rises to 200, 300, 400, or more, then you
have what is called shunting. If the A-a gradient is less than 300
it's technically called a ventilation perfusion (VQ) mismatch.
But generally speaking, as the gradient widens it can properly be
said that there is an increase in pulmonary shunting.
How many hours will an H cylinder with 1400 psi last for a
patient receiving oxygen at 7 lpm?
A. 6 hours
B. less than 1 hour
C. 4 hours
D. 10 hours - • The correct answer is : D
• • Explanation :
And H cylinder has a tank factor of 3.14. 3.14x1400 PSI = 4396
L. 4396 L / 7 L per minute = 628 min. 628 min./ 60 min.= 10.4
hours, or about 10 hours. When you get an answer that is not
exact, pick the closest number possible. It is common on the
2025
Which of the following equipment is most helpful at measuring
FRC in a patient who has significant non-ventilated lung spaces?
A. nitrogen analyzer for a nitrogen washout test
B. helium analyzer for a helium dilution test
C. peak flow meter
D. plethysmograph - • The correct answer is : D
• Explanation :
You can determine FRC in three different ways - body box,
nitrogen washout, or helium dilution. If someone has non-
ventilated lung space, nitrogen washout and helium dilution are
not helpful and may be inaccurate. FRC determined by body box
will be higher because it can access non-ventilated lung space
and therefore is more accurate
The respiratory therapist is making a home visit to evaluate an
oxygen-dependent patient. The patient has 3+ pitting peripheral
edema and has not followed the physician's orders to limit fluid
intake. You would expect which of the following hemodynamic
values?
,A. elevated right sided preload with a normal to low right
ventricular after load
B. elevated PCWP with a low cardiac output
C. reduced cardiac index
D. low mean arterial pressure - The correct answer is : A
• • Explanation :
Right-sided preload is another name for CVP (central venous
pressure). Peripheral edema is one of the signs associated with
right heart failure, which results in an elevated CVP with a
normal or low pulmonary artery pressure (PAP), a.k.a. right
ventricular afterload
A ventilator-dependent patient is scheduled for an MRI, which
will require a transport of 90 minutes. The patient is receiving
humidification with a heated- humidification system. A transport
ventilator is available. How should a respiratory therapist assure
that humidification will be provided to the patient during the
MRI procedure?
A. Provide an HME
B. Provide a pass-over humidifier
C. Provide ventilation with a manual resuscitator
D. Use the same humidification system in use on the primary
ventilation - • The correct answer is : A
,• • Explanation :
A heat moisture exchanger (HME) is appropriate for a transport
of only 90 min. Furthermore, the scenario does not suggest that
the patient has thick, retained secretions, therefore an HME may
be applied
Which of the following conditions would benefit most from
polysomnography?
A. obesity with increased day-time sleepiness
B. suspected increased airway resistance
C. congestive heart failure
D. COPD - • The correct answer is : A
• • Explanation :
Polysomnography is another word for sleep study. An obese
patient who has daytime sleepiness would benefit most from
polysomnography. Keep in mind that Polysomnography is the
study of the problem - not the solution. But it must be done for
diagnostic purposes and in order to find the adequate CPAP
setting
Which of the following can accurately be stated about a
widening alveolar-arterial oxygen gradient?
A. improving V/Q mismatch
, B. decreased venous admixture
C. increased intrapulmonary shunting
D. onset of oxygen toxicity - • The correct answer is : C
• Explanation :
A normal alveolar arterial oxygen gradient is below 65 mmHg.
When that gradient rises to 200, 300, 400, or more, then you
have what is called shunting. If the A-a gradient is less than 300
it's technically called a ventilation perfusion (VQ) mismatch.
But generally speaking, as the gradient widens it can properly be
said that there is an increase in pulmonary shunting.
How many hours will an H cylinder with 1400 psi last for a
patient receiving oxygen at 7 lpm?
A. 6 hours
B. less than 1 hour
C. 4 hours
D. 10 hours - • The correct answer is : D
• • Explanation :
And H cylinder has a tank factor of 3.14. 3.14x1400 PSI = 4396
L. 4396 L / 7 L per minute = 628 min. 628 min./ 60 min.= 10.4
hours, or about 10 hours. When you get an answer that is not
exact, pick the closest number possible. It is common on the
