Pulmonology Practice Questions

Q: What is the best management option in a patient with COPD presenting with low SpO2 at rest?

Low-flow oxygen therapy. The primary goal in managing a patient with COPD and resting hypoxemia (SpO2 < 88-90% or PaO2 < 55-60 mmHg) is to correct the oxygen deficit and prevent complications like pulmonary hypertension and cor pulmonale [1]. **1. Why Low-flow Oxygen Therapy is Correct:** Long-term oxygen therapy (LTOT) is one of the few interventions in COPD proven to **improve survival** [1], [3]. In patients with resting hypoxemia, low-flow oxygen (usually via nasal cannula at 1-2 L/min) aims to maintain SpO2 between 88-92%. It reduces the work of breathing and decreases secondary polycythemia [1]. **2. Why Other Options are Incorrect:** * **Smoking Cessation (A):** While this is the most effective intervention to slow the rate of decline in FEV1, it does not provide immediate correction for acute or chronic resting hypoxemia [2]. * **Bronchodilators (B):** These are the mainstay for symptomatic relief and reducing exacerbations [2]. However, they do not significantly improve oxygenation in patients with established resting hypoxemia or improve mortality. * **Mucolytics (C):** These may help reduce the frequency of exacerbations in patients with chronic bronchitis but have no role in managing hypoxemia. **High-Yield Clinical Pearls for NEET-PG:** * **Mortality Benefit in COPD:** Only two interventions are proven to reduce mortality: **Smoking cessation** and **Long-term Oxygen Therapy (LTOT)** (used >15 hours/day) [1], [3]. * **Indications for LTOT:** 1. PaO2 ≤ 55 mmHg or SpO2 ≤ 88%. 2. PaO2 56–59 mmHg if there is evidence of cor pulmonale, congestive heart failure, or polycythemia (Hematocrit > 55%) [1]. * **Target SpO2:** In COPD, always aim for **88-92%** to avoid suppressing the hypoxic respiratory drive, which could lead to CO2 retention (hypercapnia).

Q: What is the DOC in allergic bronchopulmonary aspergillosis (ABPA)?

Prednisolone. **Explanation:** **Allergic Bronchopulmonary Aspergillosis (ABPA)** is a complex hypersensitivity reaction (Type I, III, and IV) to *Aspergillus fumigatus* colonizing the airways, typically seen in patients with asthma or cystic fibrosis. **1. Why Prednisolone is the Correct Answer:** The primary pathology in ABPA is not an active invasive infection, but an **exaggerated immune response** to fungal antigens. Therefore, the **Drug of Choice (DOC) is Oral Corticosteroids (Prednisolone)**. Steroids work by suppressing the inflammatory response, reducing eosinophilia, and decreasing IgE levels, thereby preventing the progression to bronchiectasis and pulmonary fibrosis [1]. **2. Why the Other Options are Incorrect:** * **IV Amphotericin B:** This is a potent antifungal used for *invasive* aspergillosis. In ABPA, the fungus is colonizing, not invading tissue; hence, systemic toxic antifungals are not first-line. * **IV Pheniramine Maleate:** This is an antihistamine used for acute allergic reactions (like urticaria). It has no role in managing the complex T-cell mediated airway inflammation of ABPA. * **Fluconazole:** *Aspergillus* species are inherently resistant to Fluconazole. If an antifungal is added to steroids (as a steroid-sparing agent), **Itraconazole** is the drug of choice, not Fluconazole. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnostic Criteria (Rosenberg-Patterson):** Look for asthma, fleeting pulmonary opacities, **central bronchiectasis** (classic sign), elevated total serum IgE (>1000 IU/mL), and peripheral eosinophilia. * **Radiology:** "Finger-in-glove" appearance due to mucoid impaction [1]. * **Monitoring:** Treatment response is monitored by serial **Total Serum IgE levels** (a 25-50% drop indicates improvement). * **Staging:** ABPA is classified into 5 stages (Acute, Remission, Exacerbation, Corticosteroid-dependent, and Fibrotic).

Q: A 67-year-old woman presents with increasing shortness of breath on exertion. She has no prior cardiac or pulmonary history and reports no symptoms of chest discomfort, cough, sputum production, orthopnea, or peripheral edema. Her physical examination, including vital signs, cardiac, and pulmonary examinations, is completely normal. Her CXR, ECG, and CBC are also normal. Pulmonary function tests reveal a reduction in the ratio of FEV1/FVC with no reversibility upon administration of inhaled salbutamol. What is the most likely diagnosis?

COPD. ### Explanation The key to solving this clinical scenario lies in the interpretation of the **Pulmonary Function Test (PFT)**. **1. Why COPD is the Correct Answer:** The patient exhibits a **reduced FEV1/FVC ratio** (typically <0.70), which is the hallmark of an **obstructive lung disease** [3]. The lack of reversibility after salbutamol administration distinguishes it from asthma [2] and points toward **COPD**. While the patient is a non-smoker with a normal physical exam and CXR, it is a high-yield fact that early or mild-to-moderate COPD often presents with a completely normal physical examination and imaging [1]. In the elderly, COPD can occur due to biomass fuel exposure or age-related lung changes, even in the absence of classic risk factors [3]. **2. Why the Other Options are Incorrect:** * **Ankylosing Spondylitis, Pickwickian Syndrome (Obesity Hypoventilation), and Scleroderma:** These conditions are all causes of **Restrictive Lung Disease**. In restrictive patterns, the FEV1 and FVC both decrease proportionately, leading to a **normal or increased FEV1/FVC ratio** [4]. * **Ankylosing Spondylitis/Scleroderma:** These involve chest wall rigidity or interstitial changes, which would not cause an obstructive ratio [4]. * **Pickwickian Syndrome:** This is associated with a high BMI and daytime hypercapnia, typically showing restriction on PFTs [4]. **Clinical Pearls for NEET-PG:** * **Gold Standard for COPD Diagnosis:** Spirometry (Post-bronchodilator FEV1/FVC < 0.7) [3]. * **Normal CXR:** Does not rule out COPD; it is often normal until significant emphysema or hyperinflation develops [1]. * **Obstructive vs. Restrictive:** * *Obstructive (FEV1/FVC ↓):* COPD, Asthma, Bronchiectasis, Cystic Fibrosis [3]. * *Restrictive (FEV1/FVC Normal/↑):* ILD, Kyphoscoliosis, Neuromuscular weakness, Obesity [4].

Q: A 54-year-old man presents with dyspnea and a cough. He is a non-smoker with no relevant occupational exposures. His pulmonary function test results are as follows: Pre-Bronchodilator (BD) Post-BD Test Actual Predicted % Predicted Actual % Change FVC (L) 3.19 4.22 76 4.00 25 FEV1 (L) 2.18 3.39 64 2.83 30 FEV1/FVC (%) 68 80 714. What is the most probable diagnosis based on these results?

Moderate airflow obstruction. ### Explanation To interpret Pulmonary Function Tests (PFTs) for NEET-PG, follow a systematic stepwise approach: **1. Identify Obstruction (FEV1/FVC Ratio):** The primary indicator of obstructive lung disease is a decreased FEV1/FVC ratio (typically 80%: Mild * **50–80%: Moderate** * 30–50%: Severe * 12% AND >200 mL**. This patient shows a **30% increase** in FEV1, suggesting a highly reversible airway disease like Asthma. --- ### Why the other options are incorrect: * **Option A (Normal):** The FEV1/FVC ratio is below 70%, and FEV1 is below 80% predicted, which is pathological. * **Option C (Severe):** Severe obstruction requires an FEV1 between 30% and 50%. At 64%, this patient is in the moderate range. * **Option D (Restrictive):** Restrictive lung disease is characterized by a **normal or increased** FEV1/FVC ratio and a decrease in Total Lung Capacity (TLC) or FVC. Here, the ratio is low, pointing to obstruction. --- ### High-Yield Clinical Pearls for NEET-PG: * **Gold Standard for Obstruction:** FEV1/FVC ratio < 0.7. * **Gold Standard for Restriction:** Total Lung Capacity (TLC) < 80% predicted. * **Reversibility:** Essential to differentiate Asthma (usually reversible) from COPD (largely irreversible). * **Flow-Volume Loops:** In obstruction, the loop shows a "scooped-out" appearance; in restriction, the loop is narrow and tall ("witch’s hat").

Q: A patient with bronchial asthma is prescribed 2 puffs from a metered dose inhaler of budesonide. Which of the following actions should be avoided when using the inhaler?

Clean the inhaler after every use.. ### Explanation **Correct Option: B. Clean the inhaler after every use.** **Why it is the correct answer:** While hygiene is important, cleaning a Metered Dose Inhaler (MDI) after **every** single use is unnecessary and can be counterproductive. Most manufacturers recommend cleaning the plastic actuator (the sleeve) only **once a week** with warm running water to prevent medication buildup that might block the spray. Frequent washing can lead to moisture retention in the nozzle, potentially interfering with the drug delivery mechanism. **Analysis of Incorrect Options:** * **A. Shake the inhaler well before use:** This is a mandatory step for MDIs. Most MDIs are suspensions; shaking ensures the active drug (Budesonide) and the propellant are mixed thoroughly to deliver an accurate dose. * **C. Wait for 1 minute between puffs:** When two puffs are prescribed, a gap of 30–60 seconds is recommended. This allows the valve to refill and the propellant to stabilize, ensuring the second puff contains the full therapeutic dose. * **D. Rinse the mouth after every use:** This is a critical step for **Inhaled Corticosteroids (ICS)** like Budesonide [1]. Rinsing the mouth and spitting helps prevent local side effects such as **Oropharyngeal Candidiasis (Oral Thrush)** and dysphonia caused by drug deposition in the throat. **High-Yield Clinical Pearls for NEET-PG:** 1. **MDI Technique:** The most common error in MDI use is poor **hand-breath coordination**. Using a **spacer** device is the best way to overcome this and increase lung deposition [2]. 2. **ICS Side Effects:** Systemic absorption of ICS is minimal, but long-term high doses can rarely lead to cataracts or decreased bone density. Local effects (thrush) are much more common [1]. 3. **Dry Powder Inhalers (DPIs):** Unlike MDIs, DPIs (e.g., Rotahalers) should **not** be shaken and require a deep, rapid forceful inhalation rather than the slow, steady breath used for MDIs.

Q: Regarding Allergic Bronchopulmonary Aspergillosis, which of the following is NOT true?

Peripheral bronchiectasis. **Explanation:** **Allergic Bronchopulmonary Aspergillosis (ABPA)** is a complex hypersensitivity reaction to *Aspergillus fumigatus* that occurs primarily in patients with bronchial asthma or cystic fibrosis [1]. **1. Why "Peripheral Bronchiectasis" is the correct answer (The False Statement):** In ABPA, the characteristic radiological finding is **Central Bronchiectasis** (involving the medial two-thirds of the lung fields), typically affecting the upper and middle lobes. This occurs because the thick, tenacious mucus plugs containing *Aspergillus* hyphae lodge in the large proximal airways, leading to wall destruction and dilation. **Peripheral bronchiectasis** is not a feature of ABPA; in fact, the presence of peripheral sparing while having central dilation is a classic diagnostic clue. **2. Analysis of Other Options:** * **A. Peripheral blood eosinophilia:** This is a hallmark of ABPA (usually >1000 cells/μL). It reflects the systemic inflammatory response to the fungal antigens. * **B. Elevated IgE:** Total serum IgE levels are characteristically very high (often >1000 IU/mL) [1]. It is used both for diagnosis and for monitoring treatment response/relapses. * **D. Type I hypersensitivity reaction:** ABPA is unique because it involves a combination of **Type I** (IgE-mediated mast cell degranulation), **Type III** (Immune-complex mediated), and **Type IV** (cell-mediated) hypersensitivity reactions. Since Type I is a major component, this statement is true [1]. **Clinical Pearls for NEET-PG:** * **Classic Sign:** "Finger-in-glove" appearance on Chest X-ray/CT (due to mucoid impaction). * **Diagnosis:** Rosenberg-Patterson Criteria. * **Treatment:** Oral Corticosteroids (to reduce inflammation) + Itraconazole (to reduce fungal burden). * **High-Yield:** ABPA is a common cause of "refractory asthma" or "difficult-to-treat asthma." Always check IgE levels in such patients.

Question 1

What is the best management option in a patient with COPD presenting with low SpO2 at rest?

Accepted Answer

Low-flow oxygen therapy

Answer

Smoking cessation

Answer

Bronchodilators

Answer

Mucolytics

Question 2

What is the DOC in allergic bronchopulmonary aspergillosis (ABPA)?

Accepted Answer

Prednisolone

Answer

IV Amphotercin B

Answer

IV Pheniramine maleate

Answer

Fluconazole

Question 3

A 67-year-old woman presents with increasing shortness of breath on exertion. She has no prior cardiac or pulmonary history and reports no symptoms of chest discomfort, cough, sputum production, orthopnea, or peripheral edema. Her physical examination, including vital signs, cardiac, and pulmonary examinations, is completely normal. Her CXR, ECG, and CBC are also normal. Pulmonary function tests reveal a reduction in the ratio of FEV1/FVC with no reversibility upon administration of inhaled salbutamol. What is the most likely diagnosis?

Accepted Answer

COPD

Answer

Ankylosing spondylitis

Answer

Pickwickian syndrome

Answer

Scleroderma of the chest wall

Question 4

A 53-year-old man presents with progressive shortness of breath of insidious onset. He denies cough, sputum, or chest discomfort. His past medical history includes well-controlled hypertension and type 2 diabetes. He is a lifetime non-smoker and has no history of occupational exposure. Pulmonary function tests reveal a restrictive defect, and high-resolution CT suggests pulmonary fibrosis. What is the most likely role of transbronchial biopsy in evaluating this patient?

Accepted Answer

To diagnose specific causes of interstitial lung disease

Answer

To assess disease severity

Answer

To assess possible bronchiolar narrowing

Answer

To determine the degree of inflammation

Question 5

A 54-year-old man presents with dyspnea and a cough. He is a non-smoker with no relevant occupational exposures. His pulmonary function test results are as follows: Pre-Bronchodilator (BD) Post-BD Test Actual Predicted % Predicted Actual % Change FVC (L) 3.19 4.22 76 4.00 25 FEV1 (L) 2.18 3.39 64 2.83 30 FEV1/FVC (%) 68 80 714. What is the most probable diagnosis based on these results?

Accepted Answer

Moderate airflow obstruction

Answer

Normal pulmonary function tests

Answer

Severe airflow obstruction

Answer

Restrictive lung disease

Question 6

A patient with bronchial asthma is prescribed 2 puffs from a metered dose inhaler of budesonide. Which of the following actions should be avoided when using the inhaler?

Accepted Answer

Clean the inhaler after every use.

Answer

Shake the inhaler well before use.

Answer

Wait for 1 minute between puffs.

Answer

Rinse the mouth after every use.

Question 7

A 38-year-old man presents with progressive shortness of breath and cough. He denies fever, chills, or purulent sputum production. Physical examination reveals decreased breath sounds with hyperresonant upper lung fields, more prominent on the right. Arterial blood gases on room air show: pH 7.35; PCO2 38 mm Hg; PO2 78 mm Hg. Spirometry results are: FVC 1.72 L (70% of predicted); FEV1 1.34 L (60% of predicted); FEV1/FVC ratio 76%; TLC 4.1 L (100% of predicted); TLC by helium dilution 3.4 L (71%); DLCO 70% of predicted. There is no bronchodilator response. What is the next management option?

Accepted Answer

Perform CT scan of the chest

Answer

Place a chest tube urgently

Answer

Increase bronchodilator dosage and frequency

Answer

Start chest physical therapy

Question 8

A 50-year-old male presented with complaints of cough with expectoration, fever, and malaise for 3 weeks. The patient is a chronic alcoholic and has had frequent hospitalizations in the past. On examination, he has extremely poor dentition, foul-smelling sputum, and wheezing over the upper zone of the right lung. A chest x-ray and a CT scan were conducted. Which is the most appropriate therapy to be given in the above condition?

Accepted Answer

Clindamycin

Answer

Penicillin

Answer

Metronidazole

Answer

Aztreonam

Question 9

Regarding Allergic Bronchopulmonary Aspergillosis, which of the following is NOT true?

Accepted Answer

Peripheral bronchiectasis

Answer

Peripheral blood eosinophilia

Answer

Elevated IgE

Answer

Type I hypersensitivity reaction

Question 10

A patient with severe neurological devastation after head trauma has been mechanically ventilated for their entire hospital stay. Which of the following clinical findings is diagnostic of ventilator-associated pneumonia?

Accepted Answer

Greater than 10,000 colony-forming U/mL of an organism on bronchoalveolar lavage

Answer

White blood cell count of greater than 12,000/mm³

Answer

Greater than 1,000 colony-forming U/mL of an organism on bronchoalveolar lavage

Answer

Purulent tracheal secretions

Pulmonology — MCQs

Pulmonology — MCQs

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