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CRT: 1040 Online Flashcards

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CRT (Certified Respiratory Therapist) exam prep: 1040 question-and-answer flashcards covering procedures, diagnostics, management. Try 30 free below — no sign-up required.

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📚 assessmentmedium

A patient reports smoking 1.5 packs of cigarettes daily for 20 years, then 0.5 packs daily for the last 10 years. What is the total pack-year history, and why is this value critical for NBRC assessment?

#smoking#history
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Card #1
Answer
Calculation: (1.5 x 20) + (0.5 x 10) = 35 pack-years. NBRC emphasizes pack-years to quantify COPD and lung cancer risk. Clinical Pearl: 1 pack = 20 cigarettes. Strategy: If the patient uses pipes or cigars, it is usually not calculated in pack-years unless specifically asked for cigarette equivalents. For the CRT exam, focus on the cigarette calculation as a primary risk marker for obstructive disease and eligibility for low-dose CT screening.
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Card #1
2
📚 assessmenthard

A patient with a BMI of 36, neck circumference of 18 inches, and frequent daytime sleepiness is being evaluated. Which screening tool is most appropriate for the RT to use in the initial history, and what specific score indicates high risk?

#sleep_apnea#assessment
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Card #2
Answer
The STOP-BANG questionnaire is the gold standard for OSA screening. Components: Snoring, Tiredness, Observed apnea, Pressure (BP), BMI (>35), Age (>50), Neck (>16in/40cm), Gender (Male). A score of 5-8 indicates high risk for OSA. NBRC Exam Tip: Recognize that Neck circumference and BMI are disproportionately weighted in clinical suspicion. High-risk patients require a referral for a Polysomnogram (PSG).
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Card #2
3
📚 assessmentmedium

During a history, a patient reports needing three pillows to sleep comfortably at night to avoid shortness of breath. How should the RT document this finding, and what underlying pathology does it most likely suggest?

#cardiac#assessment
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Card #3
Answer
This is documented as Orthopnea (specifically 3-pillow orthopnea). It is a hallmark sign of Left-Sided Heart Failure or Congestive Heart Failure (CHF). As the patient lies flat, venous return increases, which the failing left ventricle cannot handle, leading to pulmonary congestion. NBRC Focus: Distinguish orthopnea from Paroxysmal Nocturnal Dyspnea (PND), which is sudden gasping for air that wakes the patient from sleep. Both point to cardiac etiology.
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Card #3
4
📚 assessmenthard

A 55-year-old patient presents with a persistent, non-productive cough but has no history of smoking, wheezing, or fever. They recently started medication for hypertension. Which medication class is the most likely cause, and why?

#medications#cough
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Card #4
Answer
ACE Inhibitors (e.g., Lisinopril) are a common cause of drug-induced dry cough due to the accumulation of bradykinin in the upper airways. Exam Strategy: When a patient presents with a new cough and no signs of infection or obstruction, always check the medication history for prils. Distractor: Beta-blockers typically cause bronchospasm/wheezing in asthmatics, not a dry, hacking cough. Identifying this avoids unnecessary diagnostic testing.
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Card #4
5
📚 assessmentmedium

An RT asks a patient with COPD about their smoking habits. The patient states, I know smoking is bad for me and I've been thinking about quitting next month. According to the Transtheoretical Model, what stage of change is this?

#smoking_cessation#psychology
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Card #5
Answer
This is the Contemplation stage. The patient recognizes the problem and is considering change but has not yet made a firm commitment. Stages: 1. Pre-contemplation (no intent), 2. Contemplation (considering), 3. Preparation (plan to quit within 30 days), 4. Action (actively quitting), 5. Maintenance. NBRC Tip: Identifying the stage determines the intervention. Contemplators need education on benefits; those in Preparation need a quit date.
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Card #5
6
📚 assessmenthard

A 60-year-old male with a history of sandblasting and glass manufacturing presents with progressive dyspnea and eggshell calcifications on a chest X-ray. What specific occupational lung disease is most likely?

#occupational#pathology
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Card #6
Answer
Silicosis. This is a restrictive lung disease caused by inhaling silica dust. Key NBRC markers: Occupational history (sandblasting, mining, masonry) and the classic eggshell calcification of hilar lymph nodes. Clinical Pearl: Silicosis significantly increases the risk of developing Tuberculosis (TB), so a history of silica exposure should prompt the RT to monitor for signs of TB (night sweats, hemoptysis, and weight loss).
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Card #6
7
📚 assessmentmedium

A patient's Asthma Action Plan indicates they are in the Yellow Zone based on their Peak Expiratory Flow (PEF) readings. What percentage of their personal best does this represent, and what is the required immediate action?

#asthma#management
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Card #7
Answer
Yellow Zone = 50% to 79% of the patient's personal best PEF. Action: The patient should take their quick-relief rescue medication (SABA) immediately and contact their physician if they do not return to the Green Zone. NBRC Focus: Green (>80%) means all clear; Red (<50%) is a medical emergency requiring SABA and immediate ER visit. Understanding these zones is critical for patient education and discharge planning.
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Card #7
8
📚 assessmenthard

A post-operative hip surgery patient suddenly develops pleuritic chest pain and tachypnea. Which three specific risk factors in the patient's history would most strongly increase the clinical suspicion for a Pulmonary Embolism (PE)?

#pe#risk_factors
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Card #8
Answer
1. Recent major surgery/immobility (Virchow's Triad: stasis), 2. History of Deep Vein Thrombosis (DVT) or prior PE, 3. Hypercoagulable states (e.g., malignancy, oral contraceptives). Exam Strategy: NBRC often presents sudden onset dyspnea in a post-op or long-travel patient. While the history suggests PE, the definitive diagnosis requires a CT Pulmonary Angiogram or V/Q scan, but the RT must first recognize the historical risk factors to trigger the workup.
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Card #8
9
📚 assessmentmedium

A 32-year-old non-smoker presents with symptoms of emphysema and a family history of early-onset liver disease. Which genetic deficiency should the RT suspect as the primary risk factor?

#genetics#copd
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Card #9
Answer
Alpha-1 Antitrypsin (AAT) Deficiency. This is an autosomal codominant disorder where the lack of AAT protein allows neutrophil elastase to destroy alveolar tissue. NBRC Key Point: Suspect AAT when emphysema develops in young patients (<45 years) or non-smokers. A history of early-onset or unexplained COPD in family members is a major red flag. Diagnosis is confirmed by measuring serum AAT levels or genetic testing.
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Card #9
10
📚 assessmenthard

An intubated patient has been on mechanical ventilation for 72 hours. Which historical and assessment factors increase the risk for Ventilator-Associated Pneumonia (VAP), and which modifiable risk factor is often tested?

#vap#infection_control
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Card #10
Answer
Risk factors: Duration of ventilation >48 hours, advanced age, depressed LOC, and prior antibiotic use. The most frequently tested modifiable risk factor is the Head of Bed (HOB) position. HOB should be maintained at 30-45 degrees to prevent micro-aspiration of gastric contents. NBRC Focus: VAP prevention bundles also include daily sedation vacations, subglottic suctioning (CASS tubes), and oral care with chlorhexidine. History of supine positioning is a major VAP trigger.
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Card #10
11
📚 assessmentmedium

A patient reports smoking 30 cigarettes per day for 15 years, followed by 10 cigarettes per day for the last 10 years. What is the patient's total pack-year history?

#assessment#calculation
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Card #11
Answer
Pack-years = (Packs smoked per day) × (Years smoked). 1. Convert cigarettes to packs: 30 cigarettes = 1.5 packs; 10 cigarettes = 0.5 packs. 2. Calculate first period: 1.5 packs/day × 15 years = 22.5 pack-years. 3. Calculate second period: 0.5 packs/day × 10 years = 5 pack-years. 4. Total: 22.5 + 5 = 27.5 pack-years. NBRC Tip: Always convert individual cigarettes to packs first (20 cigarettes = 1 pack). Precision is vital for determining eligibility for lung cancer screening or COPD risk assessment.
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Card #11
12
📚 assessmentmedium

During a routine assessment, a patient states, "I know smoking is bad for my COPD, but I'm not ready to quit right now." According to the 5 A's and 5 R's, what is the most appropriate next step?

#assessment#behavioral
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Card #12
Answer
The patient is in the "Contemplation" or "Pre-contemplation" stage. Since they are not ready to quit, the therapist should move from the 5 A's (Ask, Advise, Assess, Assist, Arrange) to the 5 R's to enhance motivation: 1. Relevance: Why quitting is personally important. 2. Risks: Negative health consequences. 3. Rewards: Benefits of quitting. 4. Roadblocks: Identifying barriers. 5. Repetition: Repeat the intervention at every visit. NBRC Strategy: If a patient is NOT ready to quit, focus on "Assess" and "Advise" but do not "Assist" with a quit plan yet; instead, use motivational interviewing (5 R's).
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Card #12
13
📚 assessmentmedium

A patient participating in a smoking cessation program provides an exhaled carbon monoxide (CO) reading of 12 ppm. How should the Respiratory Therapist interpret this result?

#assessment#monitoring
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Card #13
Answer
Exhaled CO is a non-invasive biomarker used to validate smoking status. - 0-6 ppm: Generally indicates a non-smoker. - 7-10 ppm: Borderline/Light smoker or environmental exposure. - >10 ppm: Suggests recent smoking (usually within the last 8-12 hours). A reading of 12 ppm indicates the patient has likely smoked recently. Clinical Pearl: CO has a 200-250x higher affinity for hemoglobin than oxygen, forming carboxyhemoglobin (HbCO). Exhaled CO correlates well with blood HbCO levels. This tool is excellent for providing immediate biofeedback to patients during cessation counseling.
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Card #13
14
📚 assessmenthard

Which pharmacological intervention is currently considered the most effective monotherapy for long-term smoking cessation success in 2026 clinical guidelines?

#assessment#pharmacology
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Card #14
Answer
Varenicline (Chantix) is considered the first-line and most effective monotherapy. It is a partial agonist for the α4β2 nicotinic acetylcholine receptor. Mechanism: It provides low-level stimulation to reduce withdrawal symptoms (agonist) while blocking the "reward" effect of nicotine if the patient smokes (antagonist). NBRC Tip: While NRT (Nicotine Replacement Therapy) and Bupropion are also used, Varenicline consistently shows higher quit rates in clinical trials. Watch for contraindications like severe psychiatric history or end-stage renal disease, though it is generally well-tolerated.
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Card #14
15
📚 assessmenthard

A 55-year-old patient with a 25 pack-year history quit smoking 10 years ago. According to current USPSTF and NBRC standards, does this patient qualify for annual Lung Cancer Screening (LCS)?

#assessment#screening
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Card #15
Answer
Yes. The 2021/2026 USPSTF guidelines (adopted by NBRC) recommend annual screening with low-dose computed tomography (LDCT) for adults who: 1. Are aged 50 to 80 years. 2. Have a 20 pack-year smoking history. 3. Currently smoke or have quit within the past 15 years. This patient meets all three criteria: Age (55), Pack-years (25 > 20), and Quit duration (10 < 15 years). Exam Tip: NBRC often tests the updated 20 pack-year threshold (lowered from the old 30 pack-year standard). Screening is discontinued once a person has not smoked for 15 years or develops a limiting health problem.
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Card #15
16
📚 assessmenthard

A heavy smoker presents to the ED with shortness of breath. The SpO2 is 98% on room air, but the patient appears cyanotic. What is the most likely reason for this discrepancy?

#assessment#diagnostics
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Card #16
Answer
The SpO2 is falsely high due to the presence of Carboxyhemoglobin (HbCO) from cigarette smoke. Standard pulse oximeters (two-wavelength) cannot distinguish between Oxyhemoglobin (HbO2) and HbCO because they absorb light similarly at 660nm. Clinical Action: Obtain an ABG with Co-oximetry (Hemoximetry). Co-oximeters use multiple wavelengths of light to specifically measure HbO2, HbCO, MetHb, and reduced Hb. NBRC Key: In any patient with smoke inhalation or heavy tobacco use, SpO2 is unreliable. Always trust the SaO2 and HbCO levels from a Co-oximeter.
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Card #16
17
📚 assessmentmedium

A patient in a smoking cessation program reports intense cravings, irritability, and insomnia 48 hours after their last cigarette. Which stage of the Transtheoretical Model is this patient currently in?

#assessment#behavioral
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Card #17
Answer
The patient is in the "Action" stage. Stages of Change: 1. Pre-contemplation: No intention to quit. 2. Contemplation: Thinking about quitting in the next 6 months. 3. Preparation: Planning to quit within 30 days. 4. Action: Has quit for < 6 months; actively managing withdrawal and behavioral changes. 5. Maintenance: Has quit for > 6 months. NBRC Focus: The "Action" stage is the most critical for therapist intervention (Assist and Arrange) as the risk of relapse is highest during the first few weeks due to physical withdrawal symptoms.
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Card #17
18
📚 assessmenthard

A patient is prescribed nicotine patches but continues to experience "breakthrough" cravings in the morning. What adjustment to the cessation plan is most evidence-based?

#assessment#pharmacology
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Card #18
Answer
The most effective strategy is "Combination NRT." This involves using a long-acting delivery system (Nicotine Patch) to maintain a steady baseline nicotine level, combined with a short-acting "rescue" delivery system (Nicotine gum, lozenge, or nasal spray) to treat acute cravings. Rationale: Combination NRT is significantly more effective than monotherapy. NBRC Tip: If a patient fails on a single NRT method, the next step is usually combining NRT or switching to Varenicline. Ensure the patient is instructed NOT to smoke while using the patch to avoid nicotine toxicity.
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Card #18
19
📚 assessmentmedium

A patient smokes 1/2 pack per day for 12 years, quits for 5 years, then resumes smoking 2 packs per day for the last 4 years. Calculate the total pack-years.

#assessment#calculation
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Card #19
Answer
Total Pack-Years = 14. Calculation: Period 1: 0.5 packs/day × 12 years = 6 pack-years. Period 2 (Quit): 0 pack-years. Period 3: 2 packs/day × 4 years = 8 pack-years. Total: 6 + 8 = 14 pack-years. NBRC Strategy: Do not be distracted by the "gap" years where the patient quit. Only count the years where active smoking occurred. Pack-years are cumulative over the patient's lifetime.
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Card #19
20
📚 assessmenthard

Which physiological effect of nicotine contributes most directly to the increased cardiovascular risk observed in smokers?

#assessment#physiology
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Card #20
Answer
Nicotine acts as a sympathomimetic agent, stimulating the release of catecholamines (epinephrine and norepinephrine). This results in: 1. Increased Heart Rate (tachycardia). 2. Increased Blood Pressure (systemic vasoconstriction). 3. Increased myocardial oxygen demand. Additionally, smoking increases platelet adhesiveness and promotes endothelial dysfunction, leading to atherosclerosis. NBRC Relevance: When assessing a smoker, expect elevated baseline heart rate and BP. During smoking cessation, monitoring for cardiovascular stability is important, especially if the patient is using NRT and has a history of CAD or recent MI.
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Card #20
21
📚 basicsmedium

72yo COPD patient in respiratory failure has a documented DNR/DNI order. The patient is currently tachypneic and hypoxic (SpO2 84%). What is the most appropriate RT intervention?

#ethics#dnr
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Card #21
Answer
Provide comfort measures and non-invasive palliative care (e.g., oxygen via NC or mask, morphine for air hunger). DNR/DNI does NOT mean do not treat. It means no CPR or intubation. NBRC emphasizes that RTs must continue all care EXCEPT chest compressions, defibrillation, and invasive airway management. Strategy: Don't pick do nothing; pick the most supportive non-invasive option.
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Card #21
22
📚 basicshard

A patient is unconscious with no advance directive. The spouse wants to continue ventilation, but the adult child wants to withdraw. Who has the legal authority to decide?

#ethics#legal
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Card #22
Answer
The legal hierarchy for surrogate decision-making generally prioritizes the spouse first, followed by adult children, then parents. However, if a Durable Power of Attorney (DPOA) for Healthcare was designated, that individual takes precedence over all others. NBRC focuses on the DPOA as the ultimate authority. If no DPOA exists, the spouse is the primary surrogate in most jurisdictions.
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Card #22
23
📚 basicsmedium

An RT refuses to perform an arterial puncture on a combative patient who is clearly refusing the procedure, despite a physician's order. Which ethical principle is the RT upholding?

#ethics#autonomy
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Card #23
Answer
Autonomy. This principle recognizes the patient's right to self-determination and to refuse medical treatment. Even with a physician's order, performing a procedure against a competent patient's will constitutes battery. NBRC Tip: Autonomy often trumps Beneficence (acting in the patient's best interest) when the patient is competent and refuses care.
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Card #23
24
📚 basicshard

A terminal lung cancer patient has a Living Will stating no life-prolonging measures. The Healthcare Proxy (DPOA) demands the patient be intubated for acute failure. Which takes precedence?

#ethics#dpoa
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Card #24
Answer
The Durable Power of Attorney (DPOA) / Healthcare Proxy. While a Living Will provides guidance on the patient's wishes, the DPOA is the legal authority authorized to make real-time clinical decisions. If the DPOA's decision contradicts the Living Will, the DPOA's current instruction is typically followed by the medical team, though ethics committee consultation may be indicated.
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Card #24
25
📚 basicsmedium

During an exacerbation, a patient with a written DNR order tells the RT, I changed my mind, do everything to save me. What is the RT's immediate legal obligation?

#ethics#dnr
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Card #25
Answer
Respect the verbal revocation. A competent patient can revoke an advance directive (DNR) at any time, verbally or in writing. The RT must immediately inform the physician to update the orders and proceed with full resuscitative efforts if necessary. NBRC Strategy: Verbal statements from a competent patient always supersede prior written directives.
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Card #25
26
📚 basicshard

A physician asks an RT to slow code a terminal patient because the family won't agree to a DNR. Why is this practice ethically and legally problematic?

#ethics#veracity
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Card #26
Answer
A slow code is a violation of the standard of care and the ethical principle of Veracity (truth-telling). It is a deceptive practice that fails to provide the required resuscitation while appearing to do so. RTs should advocate for a formal ethics committee meeting or palliative care consultation rather than participating in a slow code. Duty of care requires full effort unless a DNR is in place.
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Card #26
27
📚 basicsmedium

What specific information must be provided to a patient to satisfy the requirements of Informed Consent before an invasive procedure like a bronchoscopy?

#ethics#consent
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Card #27
Answer
The patient must understand: 1) The nature/purpose of the procedure, 2) The risks and benefits, 3) Potential alternatives, and 4) The consequences of refusing. For the CRT exam, remember that the RT is often responsible for ensuring the patient understands the respiratory-specific risks (e.g., pneumothorax, bleeding) before the procedure begins.
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Card #27
28
📚 basicshard

An RT administers high-dose opioids to a terminal patient to relieve severe dyspnea, knowing it may suppress respiratory drive. Which ethical principle justifies this action?

#ethics#palliative
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Card #28
Answer
The Rule of Double Effect. This principle states that an action with a good intended effect (relieving suffering) is permissible even if it has a foreseeable but unintended bad effect (respiratory depression/death). The intent must be the good effect. NBRC focuses on this in the context of end-of-life comfort care and palliative sedation.
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Card #28
29
📚 basicsmedium

How does a POLST (Physician Orders for Life-Sustaining Treatment) differ from a standard Living Will in the acute care setting?

#ethics#polst
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Card #29
Answer
A POLST is a set of specific medical orders signed by a physician, making it immediately actionable by EMS and hospital staff. A Living Will is a legal document describing general preferences that often requires a physician to translate those wishes into medical orders. NBRC emphasizes that a POLST carries the weight of a standing order and must be followed immediately in emergencies.
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Card #29
30
📚 basicshard

A patient's family demands everything be done for a brain-dead patient on a ventilator. The medical team deems further care medically futile. What is the next ethical step?

#ethics#futility
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Card #30
Answer
Facilitate an Ethics Committee consultation. Medical futility occurs when treatment provides no physiological benefit. While clinicians are not ethically obligated to provide futile care, they cannot unilaterally withdraw life support without a process involving the family, hospital ethics board, and potentially legal counsel to ensure due process and transition to palliative care.
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Card #30

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About This Collection

I remember exactly how it felt preparing for my own certification exams. The anxiety is rarely just about passing a test; it is about knowing you are ready to handle whatever comes through the door on your next shift. Through my years of mentoring clinicians, I have found that there are no shortcuts to true competence. This complete collection represents the full scope of what you need to know, not just to pass the CRT, but to practice with authority. When I compiled these 1,040 flashcards, I wanted to move beyond surface-level memorization. In this comprehensive set, we dig deep into the nuances of pathology, advanced diagnostics, and complex management strategies. While the basics are important, the exam often tests your ability to synthesize information under pressure. You need to understand the reasoning behind a blood gas result or a specific pharmacological intervention, not just the definition. We cover the entire spectrum, from routine assessment to high-stakes emergency procedures, ensuring no topic is left to chance. I often tell the professionals I train that the exam room is just a simulation of the patient's bedside. The scenarios covered here are drawn from rigorous clinical standards. We cover the heavy hitters like blood gas QC and emergency protocols because these are the areas where hesitation can be costly. My goal is to help you build the kind of muscle memory that kicks in automatically during a code or a complex admission. This is about sharpening your clinical judgment so that the correct answers come naturally. The most successful candidates I have worked with treat studying as a daily professional discipline rather than a cram session. With a collection this size, consistency is key. I recommend tackling specific categories like pharmacology or diagnostics in focused blocks, then using mixed review sessions to test your recall speed. This spaced repetition approach mimics the unpredictability of clinical practice and ensures the information sticks long after the exam is over. Committing to this level of preparation is a serious investment in your professional future. It takes time to work through over a thousand concepts, but the confidence you gain is worth the effort. I have seen countless colleagues transform from nervous test-takers into confident, certified practitioners by putting in this work. I look forward to hearing about your success.