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Top-Rated Respiratory Care Exam Practice: Detailed Questions and Expert Answers
- Course
- Respiratory Care
- Institution
- Rush University
Top-Rated Respiratory Care Exam Practice: Detailed Questions and Expert Answers
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Top-Rated Respiratory Care Exam Practice:Detailed Questions and Expert Answers
The respiratory therapist receives an order to set up a moderate level of oxygen on
a patient who arrives in the ED breathing at a rate of 35 BPM. Which of the
following is most appropriate to use?
1. Simple O2 mask at 10 LPM
2. Nasal cannula at 4 LPM
3. Nonrebreathing mask at 15 LPM
4. Air-entrainment mask at 40% O2 -ANS>Simple mask at 10 LPM
The physician has ordered oxygen to be set up on a patient who has a
spontaneous tidal volume of 500 mL and an inspiratory time of 1 second. Which of
the following devices will deliver a flow that meets or exceeds this patient's
inspiratory flow?
1. 35% air entrainment mask at 6 LPM
2. 60% aerosol mask at 12 LPM
3. NRB at 15 LPM
4. Simple O2 mask at 10 LPM -ANS>35% air entrainment mask at 6 LPM
Use inspiratory flow equation: flow rate = L/t
,0.5 L/1 second = 0.5 LPS
0.5 x 60 = 30 LPM at least must be delivered
Find air/O2 ratio:
100-35=65
35-21=14
65/14 = 4.64, so ratio is 5:1
5+1 = 6 x 6LPM = 36 LPM delivered by the air entrainment mask
While making oxygen rounds, you discover the 6 inch reservoir tubing on a 60% T-
piece set up has fallen off. What may result from this situation?
1. The FiO2 could decrease
2. The total flow to the patient could increase
3. More room air entrainment could occur -ANS>FiO2 decrease and room
entrainment can occur
A patient is using a 30% air entrainment mask at an O2 flow of 5 LPM. What is the
total flow being delivered? -ANS>100-30 = 70
30-21 = 9
70/9 = 7.7, so 8:1
,8+1 = 9
9x5 LPM = 45 LPM
Large cylinders use which type of safety system? -ANS>ASSS (american standard
safety system)
*different number of threads/inch and different thread size
Small cylinders use which type of safety system? -ANS>PISS (pin index safety
system)
Color of carbon dioxide tank -ANS>gray
Color of nitrous oxide tank -ANS>light blue
Color of helium tank -ANS>brown
color of oxygen tank -ANS>green
Duration of cylinder equation -ANS>(cylinder pressure x cylinder factor)/flow rate
Cylinder factors for H & E cylinders: -ANS>H = 3.14
, E = 0.28
Liquid O2 equation -ANS>Gas remaining = (Liquid weight (lbs) x 860)/2.5
Duration (minutes) = gas remaining (L)/Flow (LPM)
Indications for this include hypoxemia, labored breathing or dyspnea, and
increased myocardial work -ANS>O2 therapy
patients with COPD should maintain a PaO2 between __-__ mmHg -ANS>50-65
High oxygen concentrations in the lung can wash out nitrogen and reduce the
production of what, leading to atelectasis? -ANS>surfactant
If a normal PaO2 level cannot be maintained with a 60% O2 mask, a large shunt is
probable and ____ should be administered if CO2 is normal -ANS>CPAP
Normal PaO2 for infants -ANS>50-70 mmHg
When given a patient using 60% O2 or higher who has a normal or low PaCO2 but
has hypoxemia, place the patient on _____
(unless they have hypotension, low CO, or increased ICP - increase FiO2 in these
cases) -ANS>CPAP
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