A galvanic fuel cell oxygen analyzer fails to reach the proper reading when analyzing an FIO2 of 100%.The respiratory care practitioner should:
- Continue using the analyzer
- Replace the analyzer with a new one
- Change the fuel cell
- Replace the battery
A patient is diagnosed with septic shock and has a fever of 105 degrees Fahrenheit. The RCP fails to make a temperature correction to the analyzer. How will this make the ABG analysis inaccurate?
- Lower pH
- Higher PO2
- Lower CO2
- Higher pH
- Lower PO2
A patient with kyphoscoliosis performs maximum inspiratory and expiratory maneuvers with the following results:MIP +110 MEP -160. The correct interpretation would be:
- The results are normal
- The results are invalid and should not be reported
- The results are normal on inspiration and abnormal on expiration
- The results are normal on expiration and abnormal on inspiration
A patient with pulmonary fibrosis has a compliance study performed. Which of the following indicate that the esophageal balloon is placed correctly in the esophagus?
- Cardiac pulsations are recorded by the pressure transducer
- Inspiration causes a negative pressure deflection
- Expiration causes a negative pressure deflection
- No pressure change occurs during inspiration
All of the following statements are true concerning the Helium analyzer EXCEPT:
- Measures percentage of He
- Are safe to use with flammable gases
- Are often found in pulmonary function equipment
- Makes use of thermal conductivity
All of the following statements concerning blood-based controls used in the ABG lab are correct EXCEPT:
- They require refrigeration
- They consist of human red blood cells
- They must be ran every 8 hours
- They are packaged in 2-3 ml ampoules
At what lung level should a maximum inspiratory pressure maneuver be performed?
- Functional residual capacity
- Residual volume
- End-tidal inspiration
- Total lung capacity
Correct expressions for the relationship between respiratory rate, tidal volume and minute ventilation include:
- VE = Vt Rate
- Vt = VE Rate
- VE = Rate x Vt
- Rate = VE Vt
Data used for detecting a blood-gas machine that is out of control is:
- The + or – 2 standard deviation
- The + or – 4 standard deviation
- The + or – 1 standard deviation
- The + or – 3 standard deviation
How would you correct an out of control situation for a blood gas analyzer?
- Replace the electrode that displays the out of control error
- Clean the membrane with the out of control error with a pumice stone
- Nothing is required for an out of control situation, continue to use the blood gas analyzer
- Remove the blood gas analyzer and replace it with a new one
It would be appropriate to use the Wright respirometer to measure which of the following parameters?
- Tidal volume
- Vital capacity
- Forced expiratory capacity
- Peak expiratory flow rate
- Minute volume
Running the same sample on one or more other blood gas analyzers in the ABG lab to assure accuracy is known as:
- Monthly quality assurance
- Multiple machine analysis
- Proficiency Testing
- Preventative maintenance
The RRT has been asked to measure a patient’s MIP. Which of the following instruments should be selected to obtain this measurement?
- Pressure strain-gauge
- Pressure manometer
- Pressure transducer
The following data is obtained during quality assurance of a blood gas machine. Mean (normal) values are: PO2 – 100, PCO2 – 50, pH – 7.28. The standard deviation is + or – 2 SD.
PO2 PCO2 pH
Day shift 101 49 7.28
Evening shift 102 53 7.26
Night shift 104 51 7.29
Which of the following statements is/are true?
- Data indicates no trouble shooting required on day shift
- Data indicates need for trouble shooting of the PCO2 electrode on evenings
- Data indicates need for trouble shooting of PO2 electrode on nights.
Tidal volume and minute ventilation must be determined from a patient that has a measured minute volume of 7.35 L and a respiratory rate of 18/minute. What is this patient’s tidal volume value?
- 132 ml
- 408 ml
- 180 ml
- 735 ml
What should the pulmonary function technologist take into consideration with each test before reporting test results?
- Equipment performance
- Technologist performance
- Age of equipment being used
- Patient performance
When calibration gas analyzers, which of the following should be calibrated to a 0% reading as the first point (percentage)?
- Carbon dioxide/Carbon monoxide
When measuring minute ventilation using a Wright’s respirometer:
- A pressure manometer is needed to determine values
- The number of breaths taken by the patient should be counted during the measuring period
- A value obtained by measuring inspiratory volumes will be smaller than expiratory volumes
- The tidal volume is collected (measured) for three minutes
Which agency sets forth standards that must be met to assure accuracy of equipment?
- ALA (American Lung Association)
- CGA (Compressed Gas Association)
- ACCP (American College Chest Physicians)
- ATS (American Thoracic Society)
Which of the following diseases will most likely exhibit an increased compliance?
- Pulmonary fibrosis
- Chronic bronchitis
Which of the following statements are correct regarding total lung and thoracic compliance?
- There is less inspired volume per cmH2O in CLT than in either CL or CT alone
- There is more inspired volume per cmH2O in CT than in CL
- There is less inspired volume per cmH2O in CT than in CL
- There is more inspired volume per cmH2O in CLT than in CT alone
Which of the following test is used as an indicator of ventilatory inspiratory muscle strength?
- Forced vital capacity
- Expiratory reserve volume
- Maximal inspiratory pressure
- Maximal expiratory pressure
Which of the following types of equipment would enable the measurement of the transpulmonary pressure, which is needed to calculate pulmonary compliance?
- Fiber-optic bronchoscope
- Intraesophageal balloon
- Transcutaneous PO2 electrode
Which of the following is NOT a good indication to perform MIPs and MEPs?
- Inability to cough effectively
- Myasthenia gravis
- Pulmonary hypertension
- Amothopic lateral sclerosis
While working in a PFT lab, you discover that the nitrogen analyzer is not functioning correctly. You would do which of the following?
- Go ahead and use the analyzer as long as it is working
- Replace the nitrogen analyzer with a helium analyzer
- Take the analyzer to Biomedical lab for corrective maintenance
- Ask a technician to perform preventative maintenance on the analyzer
You are a respiratory therapist in charge of the ABG lab. One of your responsibilities is calibration of the gases used by the blood gas machines. The tank containing O2 is a 20% concentration. The barometric pressure is 760 mmHg on this particular day. Calculate the concentration of the O2 in mmHg so that you can compare your readouts to assure proper calibration.
- 162 mmHg
- 125 mmHg
- 158 mmHg
- 143 mmHg
You are calibrating a spirometer with a super syringe, and after injecting 3L of air for three consecutive calibrations; the results are 2.8L, 3.0L, and 3.2L.
Based on these results, the spirometer is considered:
Which of the following is equal to RV?
- FRC – ERV
- TLC – VC
- VC – IRV
- IC – IRV
Which of the following is equal to IC?
- TLC – RV
- VC – ERV
- RLC – IRV
- VT + ERV
A patient has a VC of 4200 ml, an FRC of 3300 ml, and ERV of 1500 ml. What is the patient’s RV?
- 2700 ml
- 3700 ml
- 1500 ml
- 1800 ml
Results of a pulmonary function study on a patient indicate a VC of 3600 ml, a FRC of 2000 ml, and a RV of 1000 ml. What is the TLC?
- 5500 ml
- 7000 ml
- 4600 ml
- 8600 ml
If VT is 650 ml, ERV is 1100 ml, and RV is 1150 ml; FRC would be equal to:
- 3650 ml
- 4750 ml
- 2250 ml
- 2900 ml
Which of the following would be most consistent with an obstructive disorder?
- FEV1/FVC% less than 65% predicted
- 15% improvement in bronchodilator challenge
- Increased PEFR
- TLC values of 55% of predicted
Compared to predicted normals, a patient has a normal FEV1/FVc ratio, normal FEF 25-75%, but a markedly reduced FVC. Which of the folloiwng is most likely the problem?
- A combined restrictive and obstructive disorder is present
- A restrictive disorder is present
- Poor patient effort during the test procedure
- An obstructive disorder is present
Compared to predicted normals, a patient has a reduced FVC, RV, and TLC, and a reduced FEV1 and FEV1/FVC ratio. Which of the following is most likely the problem?
- Small airways obstruction is present
- A restrictive disorder is present
- An obstructive disorder is present
- Combined restrictive and obstructive disorder is present
A patient has a prebronchodilator FEV1 value of 2.5 L/sec and a postbronchodilator value of 3,0 L/sec, what is the percent change?
Wh ch of the following is the most likely diagnosis on the basis of the following PFT results?
FVC 80% predicted
FEV1 50% predicted
FEV1/FVC% 55% predicted
FEF 25-75% 40% predicted
- Chronic bronchitis
Which of the following gases are needed to calibrate a N2 analyzer?
- 100% O2
- 21% O2
- 79% N2
- 10% N2
A severly hypothermic patient is brought to the ER. The patient has a temperature of 82 Degrees F, agonal respirations and a heart rate of 30 beats per minute. CPR is initiated and an ABG is ordered. Which of the following inaccurate results would occur if the RCP failied to make a temperature correction to the ABG analyzer?
- Higher CO2, and lower O2 and pH thant acutal results
- Lower CO2 and O2, higher pH than actual results
- Elevated CO2 and O2, lower pH than actual results
- Results would not be affected
When calibrating gas analyzers, which of the following should be calibrated back to a 0% reading as the last point?
- Carbon dioxide/carbon monoxide
A medical gas analyzer that is capable of performing breath by breath analysis during a nitrogen wash out study is the:
- Mass spectrometry
- Infrared analyzer
- Nitrogen analyzer
- Gas chromatography
Which of the following types of analyzers would be appropriate to use for measurement of exhaled CO2 when performing a Vd/Vt study at the bedside?
- Gas chromatograph
- Thermal conductive
- Wheatstone bridge
Which of the following is an disadvantage of using the Gas Chromatgraph analzyer
- Expensive and hard to maintain
- Requires longer time for analysis
- Requires a vacuum and an ionization chamber
- Can analysis several gases at once
Which of the following statements are correct regarding airway conductance (Gaw)?
- Gaw is the same as Ra
- Normal value is 0.36 o 1.70 L/sec/cmH2O
- Gaw increases as Raw decreases
- It is calculated by pressure difference divided by flowrate
Which of the following is the correct classification or severity range for a Raw reading of 7.5 cmh2O/L/sec?
- Severe Raw
- Mild Raw
- Moderate Raw
- Normal Raw