Latest PDF of RPFT: Registered Pulmonary Function Technologist

Registered Pulmonary Function Technologist Practice Test

RPFT exam Format | Course Contents | Course Outline | exam Syllabus | exam Objectives

Exam Code: RPFT
Exam Name: Registered Pulmonary Function Technologist
Number of Questions: 120 multiple-choice questions (100 scored, 20 pretest/unscored).
Time Alloted: 3 hours (180 minutes) to complete the exam
Passing Marks: The NBRC uses a scaled scoring system, with a passing score of 75 (on a scale of 0-100).

- Set Up, Maintain, Calibrate
- Body habitus equipment (for example, stadiometer, body weight scale, caliper)
- Blood gas analyzers
- Spirometers
- Aerosol delivery devices (for example, nebulizers, dosimeters)
- Metered dose or dry powder inhalers
- Valves (for example, directional, demand)
- Gas analyzers (for example, nitrogen, helium, oxygen, methane, CO)
- Body plethysmographs
- Exercise equipment (for example, treadmill, cycle ergometer)
- Field walking test equipment (for example, 6MWT, shuttle walk test)
- ECG monitors
- Gas delivery systems (for example, blenders, flowmeters)
- Pressure measuring devices (for example, manometers, transducers)
- Gas and water absorbers (for example, Drierite®, Nafion™, Perma Pure tubing)
- Emergency management equipment (for example, defibrillator, crash cart)
- Arterial / venous blood collection equipment
- Quality control devices (for example, calibration syringes, manometers, isothermal lung analog)
- Infection control materials / methods (for example, wipes, PPE, sterilization devices, filters)
- Monitors
- pulse oximeters
- blood pressure (for example, manual cuff, automated)

- Troubleshoot
- Body habitus equipment (for example, stadiometer, body weight scale, caliper)
- Blood gas analyzers
- Spirometers
- Aerosol delivery devices (for example, nebulizers, dosimeters)
- Metered dose or dry powder inhalers
- Valves (for example, directional, demand)
- Gas analyzers (for example, nitrogen, helium, oxygen, methane, CO)
- Body plethysmographs
- Exercise equipment (for example, treadmill, cycle ergometer)
- Field walking test equipment (for example, 6MWT, shuttle walk test)
- ECG monitors
- Gas delivery systems (for example, blenders, flowmeters)
- Pressure measuring devices (for example, manometers, transducers)
- Gas and water absorbers (for example, Drierite®, Nafion TM, Perma Pure® tubing)
- Emergency management equipment (for example, defibrillator, crash cart)
- Arterial / venous blood collection equipment
- Quality control devices (for example, calibration syringes, manometers, isothermal lung analog)
- Infection control materials / methods (for example, wipes, PPE, sterilization devices, filters)
- Monitors
- pulse oximeters
- blood pressure (for example, manual cuff, automated)

- Perform Quality Control
- Body habitus equipment (for example, stadiometer, body weight scale, caliper)
- Blood gas analyzers (for example, routine testing, proficiency testing)
- Spirometers
- Aerosol delivery devices (for example, nebulizers, dosimeters)
- Metered dose or dry powder inhalers
- Valves (for example, directional, demand)
- Gas analyzers (for example, nitrogen, helium, oxygen, methane, CO)
- Body plethysmographs
- Exercise equipment (for example, treadmill, cycle ergometer)
- Field walking test equipment (for example, 6MWT, shuttle walk test)

- Select Test Protocols and Equipment
- Body habitus measurements and estimates (for example, height, arm span, ulnar length, weight)
- Spirometry
- standard
- upright / supine
- Inhaled medication delivery (for example, MDI, DPI, nebulizers)
- Blood trial collection (for example, arterial, capillary)
- Sputum trial collection
- Blood gas analysis (for example, pH, PO2, PCO2)
- CO-oximetry / hemoximetry
- Static lung volumes
- gas dilution methods
- body plethysmography
- DLCO
- Instruction for home testing (for example, spirometry, pulse oximetry)
- Patient education (for example, medication delivery, travel, asthma)
- Oxygen assessment / titration at rest and / or exercise
- Exercise testing
- field walking test (for example, 6MWT, shuttle walk test)
- monitored (for example, ECG, blood pressure, SpO2)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example, methacholine, exercise, EVH, mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example, MIP, MEP, cough peak flow)
- Patient safety (for example, standard precautions, adverse events / incidents, cross contamination)

- Perform the Procedure
- Body habitus measurements and estimates (for example, height, arm span, ulnar length, weight)
- Spirometry
- standard
- upright / supine
- Inhaled medication delivery (for example, MDI, DPI, nebulizers)
- Blood trial collection (for example, arterial, capillary)
- Sputum trial collection
- Blood gas analysis (for example, pH, PO2, PCO2)
- CO-oximetry / hemoximetry
- Static lung volumes
- gas dilution methods
- body plethysmography
- DLCO
- Instruction for home testing (for example, spirometry, pulse oximetry)
- Patient education (for example, medication delivery, travel, asthma)
- Oxygen assessment / titration at rest and / or exercise
- Exercise testing
- field walking test (for example, 6MWT, shuttle walk test)
- monitored (for example, ECG, blood pressure, SpO2)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example, methacholine, exercise, EVH, mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example, MIP, MEP, cough peak flow)
- Patient safety (for example, standard precautions, adverse events / incidents, cross contamination)

- Evaluate Validity of Result
- Body habitus measurements and estimates (for example, height, arm span, ulnar length, weight)
- Spirometry
- standard
- upright / supine
- Inhaled medication delivery (for example, MDI, DPI, nebulizers)
- Blood trial collection (for example, arterial, capillary)
- Sputum trial collection
- Blood gas analysis (for example, pH, PO2, PCO2)
- CO-oximetry / hemoximetry
- Static lung volumes
- gas dilution methods
- body plethysmography
- DLCO
- Instruction for home testing (for example, spirometry, pulse oximetry)
- Patient education (for example, medication delivery, travel, asthma)
- Oxygen assessment / titration at rest and / or exercise
- Exercise testing
- field walking test (for example, 6MWT, shuttle walk test)
- monitored (for example, ECG, blood pressure, SpO2)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example, methacholine, exercise, EVH, mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example, MIP, MEP, cough peak flow)
- Patient safety (for example, standard precautions, adverse events / incidents, cross contamination)

- Calculate Results, Select Reference Ranges and Data
- Blood gas
- CO-oximetry / hemoximetry
- Spirometry
- standard
- upright / supine comparison
- Static lung volumes
- gas dilution
- body plethysmography
- DLCO
- Home testing (for example, spirometry, pulse oximetry)
- Oxygen assessment / titration at rest and / or exercise
- Exercise test
- field walking test (for example, 6MWT, shuttle walk test)
- monitored (for example, ECG, blood pressure, SpO2)
- Blood pressure monitoring
- ECG analysis (for example, arrhythmia, rate, pattern)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example, methacholine, exercise, EVH, mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example, MIP, MEP, cough peak flow)
- Safety data (for example, hand hygiene compliance, event management)
- Quality control procedures (for example, mechanical, biological)
- Serial pulmonary function testing (for example, trending a single patient)
- Clinical history and demographics (for example, age, race, sex, smoking history, medication, clinical indication)
- Laboratory quality management (for example, customer satisfaction, inventory control, standard operating procedures)

- Evaluate Reliability of Results
- Blood gas
- CO-oximetry / hemoximetry
- Spirometry
- standard
- upright / supine comparison
- Static lung volumes
- gas dilution
- body plethysmography
- DLCO
- Home testing (for example, spirometry, pulse oximetry)
- Oxygen assessment / titration at rest and / or exercise
- Exercise test
- field walking test (for example, 6MWT, shuttle walk test)
- monitored (for example, ECG, blood pressure, SpO2)
- Blood pressure monitoring
- ECG analysis (for example, arrhythmia, rate, pattern)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example, methacholine, exercise, EVH, mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example, MIP, MEP, cough peak flow)
- Safety data (for example, hand hygiene compliance, event management)
- Quality control procedures (for example, mechanical, biological)
- Serial pulmonary function testing (for example, trending a single patient)
- Clinical history and demographics (for example, age, race, sex, smoking history, medication, clinical indication)
- Laboratory quality management (for example, customer satisfaction, inventory control, standard operating procedures)

- Evaluate Clinical Implications
- Blood gas
- CO-oximetry / hemoximetry
- Spirometry
- standard
- upright / supine comparison
- Static lung volumes
- gas dilution
- body plethysmography
- DLCO
- Home testing (for example, spirometry, pulse oximetry)
- Oxygen assessment / titration at rest and / or exercise
- Exercise test
- field walking test (for example, 6MWT, shuttle walk test)
- monitored (for example, ECG, blood pressure, SpO2)
- Blood pressure monitoring
- ECG analysis (for example, arrhythmia, rate, pattern)
- Pulse oximetry
- Airway responsiveness
- bronchodilation studies
- bronchial provocation studies (for example, methacholine, exercise, EVH, mannitol)
- Airways resistance / conductance measurements by plethysmography
- Respiratory muscle strength (for example, MIP, MEP, cough peak flow)
- Safety data (for example, hand hygiene compliance, event management)
- Quality control procedures (for example, mechanical, biological)
- Serial pulmonary function testing (for example, trending a single patient)
- Clinical history and demographics (for example, age, race, sex, smoking history, medication, clinical indication)
- Laboratory quality management (for example, customer satisfaction, inventory control, standard operating procedures)

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RPFT PDF trial Questions

RPFT trial Questions

Killexams.com exam Questions and Answers
Question: 925
A technologist sets up a nebulizer for a bronchodilator test with albuterol (2.5 mg/mL). To deliver 0.5 mg, the nebulizer runs at 0.2 mL/min. How long should it operate?
1. 1.2 seconds
2. 6.0 seconds
3. 4.8 seconds
4. 2.4 seconds
Answer: B
Explanation: Volume needed: 0.5 mg � 2.5 mg/mL = 0.2 mL. Nebulizer output: 0.2 mL/min = 0.003333 mL/s. Time = 0.2 mL � 0.003333 mL/s = 60 s � 10 = 6 s.
Question: 926
A 60-year-old patient undergoes body plethysmography. The technician records a panting maneuver with a mouth pressure change of 1.5 cmH2O and a box volume change of 0.04 L. Using Boyle's law, calculate the FRC (Patm = 1000 cmH2O, PH2O = 47 cmH2O).
1. 2.0 L
2. 3.0 L
3. 2.54 L
4. 3.5 L
Answer: C
Explanation: FRC = (?V / ?P) � (Patm - PH2O) = (0.04 / 1.5) � (1000 - 47) � 0.0267 � 953 � 2.54 L.
This calculation uses Boyle's law, accounting for the pressure-volume relationship during the closed- shutter maneuver in body plethysmography. The result is consistent with typical FRC values in adults.
Question: 927
During a CPET, a 50-year-old female's ECG shows atrial fibrillation at 70% workload. SpO2 is 95%, and blood pressure is 150/80 mmHg. What is the most appropriate action?
1. Continue and monitor ECG
2. Reduce workload by 15%
3. Stop the test immediately
4. Administer supplemental oxygen
Answer: C
Explanation: Atrial fibrillation during CPET is an absolute contraindication to continuing, as it indicates cardiac instability. Stopping the test is necessary for safety. Continuing or reducing workload is unsafe, and oxygen is not indicated for arrhythmia.
Question: 928
While performing a quality control check on a directional valve used in a spirometry circuit, the technologist notices a 10% reduction in measured forced vital capacity (FVC) when using a 3-liter calibration syringe. The valve's resistance is within specifications. What is the most likely cause of this discrepancy?
1. Improper valve orientation causing backflow
2. Leak in the valve's diaphragm
3. Obstruction in the valve's inspiratory port
4. Sticking of the valve's one-way flap
Answer: A
Explanation: Improper valve orientation causing backflow is the most likely cause of a 10% reduction in FVC during a calibration check. If the directional valve is incorrectly oriented, exhaled air may partially re-enter the inspiratory pathway, reducing the measured volume. A leak in the diaphragm would cause inconsistent volume loss, not a consistent 10% reduction. An obstruction in the inspiratory port would primarily affect inspiratory volumes, not FVC. A sticking one-way flap would cause erratic measurements, not a systematic reduction.
Question: 929
A PFT lab's inventory control system shows a 20% shortage of methacholine vials. What is the most appropriate action?
1. Order additional methacholine
2. Continue testing with available stock
3. Switch to mannitol challenge tests
4. Suspend bronchial provocation testing
Answer: A
Explanation: A 20% shortage of methacholine vials risks disrupting bronchial provocation testing. Ordering additional methacholine ensures continuity of testing. Switching to mannitol or suspending tests is unnecessary if restocking is feasible.
Question: 930
During a bronchodilation study, a 60-year-old female with COPD has a pre-bronchodilator FEV1 of 1.2 L (50% predicted) and FVC of 2.4 L (70% predicted). Post-bronchodilator (400 �g albuterol), FEV1 is
1.4 L and FVC is 2.6 L. Is this a significant bronchodilator response per ATS/ERS criteria?
1. No, neither FEV1 nor FVC meets significance
2. Yes, both FEV1 and FVC meet significance
3. Yes, FEV1 meets significance but FVC does not
4. Yes, FVC meets significance but FEV1 does not
Answer: C
Explanation: ATS/ERS criteria define a significant bronchodilator response as an increase of =12% and
=200 mL in FEV1 or FVC from baseline. For FEV1: (1.4 - 1.2) / 1.2 = 16.7% (>12%) and 200 mL (=200 mL), so FEV1 meets significance. For FVC: (2.6 - 2.4) / 2.4 = 8.3% (<12%), so FVC does not meet significance.
Question: 931
A pulse oximeter during a CPET shows SpO2 of 99% despite the patient desaturating to 90% on a previous test. The waveform is normal, and the sensor is clean. What is the most likely cause and troubleshooting step?
1. Patient improvement; confirm with ABG
2. New sensor calibration; recalibrate the device
3. Methemoglobinemia; perform co-oximetry
4. Sensor site change; move to earlobe
Answer: C
Explanation: Methemoglobinemia can falsely elevate SpO2 readings, as methemoglobin absorbs light
similarly to oxyhemoglobin. Co-oximetry confirms methemoglobin levels. Recalibration or sensor site changes are unnecessary with a normal waveform. Patient improvement is possible but requires ABG confirmation.
Question: 932
A 65-year-old male's spirometry flow-volume loop shows a scooped expiratory curve. His FEV1 is 1.5 L (60% predicted), and FVC is 3.0 L (80% predicted). What is the most likely diagnosis?
1. Asthma
2. Vocal cord dysfunction
3. Pulmonary fibrosis
4. Emphysema
Answer: D
Explanation: A scooped expiratory flow-volume loop with reduced FEV1 (60%) and normal FVC (80%) suggests emphysema, characterized by airway collapse and obstruction. Asthma may show reversibility, pulmonary fibrosis reduces FVC, and vocal cord dysfunction affects inspiratory curves.
Question: 933
During a CPET, a 55-year-old male reaches a VO2 max of 25 mL/kg/min. His ECG shows ST-segment depression of 2 mm in leads V5�V6, and blood pressure is 200/110 mmHg. What is the most appropriate action?
1. Continue testing to confirm VO2 max
2. Reduce workload and monitor ECG
3. Administer sublingual nitroglycerin
4. Stop the test immediately
Answer: D
Explanation: ST-segment depression of 2 mm and blood pressure of 200/110 mmHg are absolute indications to stop CPET due to risk of myocardial ischemia and hypertensive crisis. Continuing or reducing workload is unsafe, and administering nitroglycerin is beyond the technologist's scope without physician direction.
Question: 934
During a CPET, the technologist notices the cycle ergometer's workload fluctuates between 95 and 105 watts at a set 100 watts. The pedaling rate is steady at 60 rpm. What is the most likely cause?
1. Inconsistent flywheel resistance
2. Malfunctioning torque sensor
3. Loose drive belt
4. Power supply instability
Answer: B
Explanation: A malfunctioning torque sensor is the most likely cause of workload fluctuations in a cycle ergometer. The sensor measures applied force, and a malfunction causes inconsistent workload readings despite steady pedaling. Inconsistent flywheel resistance would cause mechanical irregularities. A loose drive belt would produce slippage, not precise fluctuations. Power supply instability affects the entire system, not just workload.
Question: 935
A 70-year-old male's ECG during a 6MWT shows sinus rhythm at 100 bpm with frequent atrial premature contractions (APCs) and a prolonged QTc of 480 ms. What is the most appropriate action?
1. Administer supplemental oxygen
2. Stop the test and refer to cardiology
3. Continue the test with ECG monitoring
4. Switch to a CPET for better monitoring
Answer: B
Explanation: Frequent APCs and a prolonged QTc (480 ms, normal <450 ms in males) during a 6MWT suggest potential arrhythmia risk or underlying cardiac pathology, especially in a 70-year-old. Stopping the test and referring to cardiology for further evaluation is the safest action. Oxygen is irrelevant to ECG findings. Continuing the test risks worsening arrhythmias, and CPET is more strenuous and inappropriate given the findings.
Question: 936
During routine quality control of a blood gas analyzer, a technologist runs a Level 2 control solution with known values: pH = 7.400, PCO2 = 40.0 mmHg, PO2 = 100.0 mmHg. The results are: pH = 7.410, PCO2
= 41.2 mmHg, PO2 = 98.5 mmHg. The lab's acceptable ranges are pH �0.015, PCO2 �3 mmHg, PO2 �5
mmHg. What action should the technologist take?
1. Accept results; analyzer is within specifications
2. Recalibrate for PCO2; repeat control testing
3. Recalibrate for PO2; repeat control testing
4. Service the analyzer; all parameters are out of range
Answer: B
Explanation: Compare the results to the acceptable ranges. For pH: |7.410 � 7.400| = 0.010, within
�0.015. For PCO2: |41.2 � 40.0| = 1.2 mmHg, within �3 mmHg. For PO2: |98.5 � 100.0| = 1.5 mmHg, within �5 mmHg. All parameters are within limits, but PCO2 is close to the upper limit (41.2 vs. 43 mmHg max). Per NBRC quality control standards, consistent drift toward the limit suggests potential calibration drift. Recalibrating for PCO2 and repeating control testing ensures reliability before patient testing.
Question: 937
During a CPET, the cycle ergometer's workload is set to 150 watts, but a dynamometer measures 135 watts at 60 rpm. The flywheel resistance is verified. What is the most likely cause?
1. Inaccurate torque calibration
2. Loose flywheel bolts
3. Misaligned drive chain
4. Worn brake pads
Answer: A
Explanation: Inaccurate torque calibration is the most likely cause of a cycle ergometer underdelivering workload (135 watts instead of 150 watts). The torque sensor measures applied force, and miscalibration reduces reported workload. Loose flywheel bolts or a misaligned drive chain would cause mechanical irregularities. Worn brake pads would cause variable resistance, not a consistent 10% error.
Question: 938
A 62-year-old female with heart failure undergoes a shuttle walk test. Pre-test: SpO2 93%, HR 85 bpm, BP 135/85 mmHg. Post-test: SpO2 85%, HR 120 bpm, BP 150/90 mmHg, distance 250 m (55% predicted). What is the primary clinical implication?
1. Exercise-induced desaturation
2. Cardiac limitation
3. Normal exercise response
4. Ventilatory limitation
Answer: A
Explanation: SpO2 drop from 93% to 85% during the shuttle walk test indicates exercise-induced desaturation, likely due to ventilation-perfusion mismatch in heart failure. HR and BP increases are normal, not indicative of cardiac or ventilatory limitation alone. The reduced distance suggests limitation, but desaturation is primary.
Question: 939
A technician performs an arterial blood gas (ABG) trial collection from a 55-year-old patient with pulmonary fibrosis. The trial is collected from the radial artery, but the syringe is not immediately placed on ice. The results show pH = 7.42, PaO2 = 65 mmHg, and PaCO2 = 38 mmHg. What is the most likely impact of the delay in icing the sample?
1. Falsely elevated PaCO2
2. Falsely lowered PaO2
3. Falsely elevated PaO2
4. No significant impact
Answer: B
Explanation: Failure to immediately place an ABG trial on ice allows continued cellular metabolism, which consumes oxygen and produces carbon dioxide. This typically results in a falsely lowered PaO2 and a potential increase in PaCO2. The PaO2 of 65 mmHg may be lower than the true value, underestimating the patient's oxygenation status. The impact is significant in patients with already compromised gas exchange, such as pulmonary fibrosis.
Question: 940
A 62-year-old patient with suspected COPD undergoes arterial blood gas (ABG) analysis. The results show pH 7.36, PaCO2 48 mmHg, PaO2 72 mmHg, HCO3? 27 mEq/L, and SaO2 92%. The technologist notices the trial was delayed in analysis by 30 minutes without ice preservation. How should the reliability of these results be evaluated?
1. Accept results as valid; delay does not affect ABG parameters significantly
2. Recalibrate analyzer and repeat test to confirm values
3. Reject results; delayed analysis without ice likely caused inaccurate PaO2 and PaCO2
4. Verify with pulse oximetry to confirm SaO2 and accept other parameters
Answer: C
ion: 941
ent's static lung volumes via helium dilution show an FRC of 2.8 L, while plethysmography he patient has COPD. What explains the discrepancy?
onsistent patient effort
ium analyzer calibration error trapping in obstructive disease thysmograph pressure drift
er: C
nation: In COPD, gas trapping causes helium dilution to underestimate FRC compared to smography, which captures all lung volumes, including trapped gas. Calibration errors or pre re less likely without specific evidence. Inconsistent effort would affect both methods similar
ion: 942
image
Explanation: Delayed analysis of an arterial blood gas trial without ice preservation can lead to continued cellular metabolism, which consumes oxygen and produces carbon dioxide. This typically results in a falsely decreased PaO2 and increased PaCO2. A 30-minute delay without cooling is significant enough to question the reliability of these results, necessitating a repeat trial with proper handling (iced and analyzed within 15 minutes). Verifying with pulse oximetry only addresses SaO2, not PaO2 or PaCO2, and recalibration does not address trial handling errors.
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Quest
A 65-year-old patient with COPD undergoes a 6-minute walk test (6MWT) with pulse oximetry. Baseline SpO2 is 94%, dropping to 87% at 4 minutes. What is the most appropriate action?
1. Stop the test and administer supplemental oxygen
2. Continue the test without intervention
3. Repeat the test with a higher baseline SpO2
4. Switch to a cardiopulmonary exercise test
Answer: A
Explanation: A SpO2 drop to 87% during the 6MWT indicates significant desaturation (ATS guideline threshold: <88%). The test should be stopped, and supplemental oxygen administered to restore SpO2 to
=90%. Continuing the test risks hypoxia, repeating the test does not address the desaturation, and switching to a CPET is inappropriate during an active test.
Question: 943
A quality control test on an isothermal lung analog yields a DLCO measurement of 22 mL/min/mm Hg, while the expected value is 25 mL/min/mm Hg (�5%). The technologist confirms the gas mixture and breath-hold time are correct. What should be done next?
1. Adjust the analyzer's CO sensor gain
2. Repeat the test with a longer breath-hold
3. Recalibrate the temperature sensor
4. Check for leaks in the gas delivery system
Answer: D
Explanation: A DLCO practicing 12% below the expected value (outside �5%) suggests a system issue, most likely a leak in the gas delivery system, which reduces the effective CO concentration. Adjusting the CO sensor gain is premature without identifying a leak. Temperature sensor calibration affects gas volume but has minimal impact on DLCO. A longer breath-hold is inappropriate as the standard 10- second hold was used.
Question: 944
A 55-year-old patient's ABG results show pH = 7.30, PaO2 = 55 mmHg, PaCO2 = 50 mmHg, and HCO3- = 24 mEq/L. What is the primary acid-base disorder?
1. Uncompensated respiratory acidosis
2. Compensated respiratory acidosis
3. Uncompensated metabolic acidosis
4. Compensated metabolic acidosis
Answer: A
Explanation: The low pH (7.30) and elevated PaCO2 (50 mmHg) indicate respiratory acidosis. The HCO3- (24 mEq/L) is near normal, suggesting no significant renal compensation, making it uncompensated. Metabolic acidosis would show a lower HCO3-, and compensated disorders would have a normalized pH.
Question: 945
A patient with asthma performs home spirometry using a portable device. Results show FEV1 2.5 L (70% predicted) with a coefficient of variation (CV) of 12%. The ATS/ERS guideline for acceptable variability is <8%. What should the technologist recommend?
1. Accept results as home devices are less precise
2. Instruct patient to Boost technique and repeat testing
3. Switch to pulse oximetry for monitoring
4. Validate results with in-lab spirometry
Answer: B
Explanation: A CV >8% indicates unacceptable variability in home spirometry, suggesting inconsistent technique or effort. The technologist should coach the patient on proper technique (e.g., forceful exhalation, tight mouthpiece seal) and repeat testing. Home devices can achieve acceptable precision with proper use. Pulse oximetry does not replace spirometry, and in-lab testing is a secondary step.

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Answer: You need genuine RPFT questions to pass the exam. The best place to download the full RPFT dumps questions is killexams.com. Visit and register to download the complete dumps questions of RPFT exam test prep. These RPFT exam questions are taken from genuine exam sources, that's why these RPFT exam questions are sufficient to read and pass the exam. Although you can use other sources also for improvement of knowledge like textbooks and other aid material these RPFT questions are enough to pass the exam.

Question: Does killexams practice test cover drag and drop questions?
Answer: Killexams include all the drag and drop questions as pictures in the document because our agents take the screenshot where any drag and drop questions are asked. These exhibits help the candidate to memorize the options and answer the drag and drop questions.

Question: Can I buy just RPFT exam PDF practice test from killexams?
Answer: Yes, Killexams RPFT PDF and VCE use the same pool of questions so If you want to save money and still want the latest RPFT Questions Answers you can buy only RPFT PDF practice test.

Question: What is Killexams VCE exam Simulator?
Answer: Killexams RPFT exam simulator is an optional product and used to practice RPFT exam on a computer. If you have a computer with windows Os, it is the best software you can use to practice the questions. The latest and up-to-date RPFT Questions Answers are included in the test prep. Complete RPFT questions are provided in the download section of your account. Killexams provide up-to-date genuine RPFT test questions that are taken from the RPFT question bank. These questions' answers are Tested by experts before they are included in the RPFT question bank. By memorizing and practicing these RPFT exam questions, you will surely pass your exam on the first attempt.

Question: Will I be able to find real exam Questions & Answers of the RPFT exam?
Answer: Yes, once registered at killexams.com you will be able to download up-to-date RPFT real exam Questions Answers that will help you pass the exam with good marks. When you download and practice the exam questions, you will be confident and feel improvement in your knowledge.

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Frequently Asked Questions about Killexams Practice Tests

Did you attempt this brilliant source to update real exam questions?
Killexams help to download up-to-date genuine RPFT test questions that are taken from the RPFT brainpractice questions. These questions\' answers are Tested by experts before they are included in the RPFT question bank.

Is there a shortcut to speedy read and pass RPFT exam?
Yes, you can pass your RPFT exam in very little time. If you have more time to study, you can prepare for an exam even in 24 hours. Although we recommend taking your time to study and practice RPFT practice questions until you are sure that you can answer all the questions that will be asked in the genuine RPFT exam. Go to killexams.com and register to download the complete dumps questions of RPFT exam brainpractice questions. These RPFT exam questions are taken from genuine exams. That\'s why these RPFT exam questions are sufficient to read and pass the exam. Although you can use other material also for improvement of knowledge like textbooks and other aid material these RPFT practice questions are sufficient to pass the exam.

What should I do to get exact RPFT questions?
It is very simple for you to get exact RPFT questions. Just visit killexams.com. Register and download the latest and 100% valid real RPFT exam questions with VCE practice tests. You just need to memorize and practice these questions and reset ensured. You will pass the exam with good marks.

Is Killexams.com Legit?

You bet, Killexams is practically legit in addition to fully efficient. There are several features that makes killexams.com unique and legit. It provides current and hundred percent valid quiz test comprising real exams questions and answers. Price is very low as compared to most of the services on internet. The Questions Answers are modified on standard basis along with most accurate brain dumps. Killexams account build up and supplement delivery is rather fast. Data downloading can be unlimited and intensely fast. Help support is available via Livechat and E mail. These are the characteristics that makes killexams.com a robust website which provide quiz test with real exams questions.

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Discover the ultimate exam preparation solution with Killexams.com, the leading provider of premium practice test questions designed to help you ace your exam on the first try! Unlike other platforms offering outdated or resold content, Killexams.com delivers reliable, up-to-date, and expertly validated exam Questions Answers that mirror the real test. Our comprehensive dumps questions is meticulously updated daily to ensure you study the latest course material, boosting both your confidence and knowledge. Get started instantly by downloading PDF exam questions from Killexams.com and prepare efficiently with content trusted by certified professionals. For an enhanced experience, register for our Premium Version and gain instant access to your account with a username and password delivered to your email within 5-10 minutes. Enjoy unlimited access to updated Questions Answers through your download Account. Elevate your prep with our VCE practice test Software, which simulates real exam conditions, tracks your progress, and helps you achieve 100% readiness. Sign up today at Killexams.com, take unlimited practice tests, and step confidently into your exam success!

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