TMC (LJU version 4) Certification Review Exam Questions And And Answers Verified.
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Which of the following equipment is most helpful at measuring FRC in a patient who has significant non-ventilated lung spaces?
A. peak flow meter
B. plethysmograph
C. helium analyzer for a helium dilution test
D. nitrogen analyzer for a nitrogen washout test - correct answer ...
Which of the following equipment is most helpful at measuring FRC in a patient who has significant non-
ventilated lung spaces?
A. peak flow meter
B. plethysmograph
C. helium analyzer for a helium dilution test
D. nitrogen analyzer for a nitrogen washout test - correct answer The correct
answer is : B
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. low mean arterial pressure
B. elevated right sided preload with a normal to low right ventricular after load
C. reduced cardiac index
D. elevated PCWP with a low cardiac output - correct answer The correct
answer is : B
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 ventilation with a manual resuscitator
B. Provide an HME
C. Use the same humidification system in use on the primary ventilator
D. Provide a pass-over humidifier - correct answer The correct answer is : B
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. congestive heart failure
C. COPD
D. suspected increased airway resistance - correct answer 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. increased intrapulmonary shunting
B. decreased venous admixture
C. improving V/Q mismatch
D. onset of oxygen toxicity - correct answer The correct answer is : A
,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. 10 hours
C. less than 1 hour
D. 4 hours - correct answer The correct answer is : B
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 exam not see the exact answer from your calculation. This is
because the NBRC knows that you're estimating.
The respiratory therapist notes a fall in pulse from 80/min to 60/min with a proportional drop in blood
pressure during a suction procedure. Which of the following would be the most likely cause of these
observations?
A. Copious secretions
B. Transient hypoxemia
C. Suction pressure is too high
D. Vagal reflex - correct answer The correct answer is : D
Explanation :
During suctioning, a patient's heart rate may fall. This is a normal physiological response associated with
the vagal reflex, or the vagal nerve response. This response will also lower blood pressure.
, A bronchopleural fistula on a patient receiving mechanical ventilation with a chest tube drainage system
in place would be most likely be indicated by which of the following observations?
A. excess bubbling in the water seal chamber
B. occasional low-exhaled volume alarm
C. I:E ratio alarms
D. high pressure ventilator alarm - correct answer The correct answer is : A
Explanation :
A bronchopleural fistula is essentially a leak from the airway in the lungs to the pleural space. This
condition can result in two things - one) a low-pressure or low-volume alarm, 2) excess bubbling in the
water seal chamber of the chest tube drainage system. When you look at the answers, a leak would not
cause a high pressure alarm.
The best test determination for a forced vital capacity maneuver is done by which of the following
calculations?
A. TLC - FVC
B. FEV1 + FVC
C. SVC + FVC
D. FEV1/FVC - correct answer The correct answer is : B
Explanation :
To determine the best trial or best patient effort for a forced vital capacity maneuver, the trial with the
highest sum of the FEV1 and FVC is considered to be the patient's best effort.
Which of the following medications would be helpful at reversing the affect of a benzodiazepine
medication?
A. Narcan
B. Versed
C. Romazicon
D. Norcuron - correct answer The correct answer is : C
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