Pulmonology Practice Questions

Q: What is the best immediate management strategy for a patient experiencing respiratory alkalosis due to anxiety-induced hyperventilation?

Rebreathing in paper bag. ***Rebreathing in paper bag*** - This helps to **increase the inspired CO2 concentration**, thereby correcting the hypocapnia (low CO2) caused by hyperventilation. - It's a simple, non-invasive method to raise arterial PCO2 and normalize blood pH in acute respiratory alkalosis. *IPPV* - **Intermittent positive pressure ventilation (IPPV)** would further reduce CO2 by assisting ventilation and is typically used for respiratory *acidosis* or failure [1]. - This intervention would worsen the patient's respiratory alkalosis rather than alleviating it. *Normal saline* - **Normal saline** administration is primarily used for volume expansion or to correct electrolyte imbalances; it does not directly address respiratory alkalosis. - It would not correct the underlying issue of excessive CO2 exhalation. *Acetazolamide* - **Acetazolamide** is a carbonic anhydrase inhibitor that reduces bicarbonate reabsorption and is used to treat metabolic alkalosis or as a diuretic. - It would not be an immediate or appropriate solution for acute respiratory alkalosis and might even worsen the acid-base balance if used improperly.

Q: The physiological marker of the last stage of acute asthma is

Increased carbon dioxide levels (Hypercapnia). ***Increased carbon dioxide levels (Hypercapnia)*** - In severe, acute asthma, **air trapping** and **muscle fatigue** lead to inadequate ventilation and impaired gas exchange [1]. - This results in a buildup of carbon dioxide in the blood, indicating impending **respiratory failure** and a critical stage of the asthma exacerbation [3]. *Hypocapnia* - **Hypocapnia**, or low blood CO2, is common in the **early stages** of an asthma attack due to **tachypnea** (rapid breathing) in an effort to compensate [1]. - As the condition worsens, the ability to ventilate adequately diminishes, leading to CO2 retention [3]. *Hyperoxia* - **Hyperoxia** means abnormally high levels of oxygen in the blood, which is generally not a physiological marker of acute asthma. - Patients with acute asthma typically experience **hypoxemia** (low oxygen levels) due to ventilation-perfusion mismatch [1]. *Alkalosis* - **Respiratory alkalosis** (high pH due to low CO2) can occur in the early stages as patients **hyperventilate**. - However, in the late stages, as CO2 builds up (**hypercapnia**), the patient shifts towards **respiratory acidosis** (low pH), which is a sign of severe compromise [2], [3].

Q: What is the complete classic triad of findings that defines Young's syndrome?

Azoospermia, bronchiectasis, and chronic sinusitis. ***Azoospermia, bronchiectasis, and chronic sinusitis*** - Young's syndrome is characterized by the triad of **azoospermia** (due to obstructive epididymal dysfunction), **bronchiectasis**, and **chronic sinusitis** [1]. - This syndrome primarily affects **middle-aged men** and is often mistaken for cystic fibrosis due to similar respiratory symptoms. *Azoospermia, asthma, and chronic rhinitis* - This option incorrectly lists **asthma** and **chronic rhinitis** instead of bronchiectasis and chronic sinusitis. - While respiratory symptoms are part of Young's syndrome, specifically **bronchiectasis** and **sinusitis** are key [1]. *Oligospermia, bronchiectasis, and chronic sinusitis* - This option is incorrect because Young's syndrome is defined by **azoospermia** (complete absence of sperm), not just **oligospermia** (low sperm count). - The obstructive nature of the epididymal dysfunction in Young's syndrome leads to a complete lack of sperm. *Azoospermia, chronic bronchitis, and nasal polyps* - This option incorrectly identifies **chronic bronchitis** and **nasal polyps** as part of the classic triad. - The correct respiratory components are **bronchiectasis** and **chronic sinusitis**, which signify persistent inflammation and structural lung changes rather than simply bronchitis.

Q: A person experiences asthma attacks more than twice during the day and at least once during the night. What is the most likely classification of their asthma?

Severe persistent asthma. ***Severe persistent asthma*** - This classification is characterized by **frequent symptoms**, specifically asthma attacks occurring more than twice daily and at least once nightly. - Individuals with severe persistent asthma often experience significant limitations in their daily activities and may have a **FEV1 (forced expiratory volume in 1 second)** less than 60% of predicted. *Intermittent asthma* - This classification is characterized by symptoms occurring less than two days per week and **nighttime awakenings less than two times per month**. - Symptoms are generally well-controlled with a short-acting beta-agonist (SABA) as needed. *Mild persistent asthma* - Patients with mild persistent asthma typically experience symptoms more than twice a week but **less than once a day**, and **nighttime awakenings 3-4 times per month**. - Their lung function (FEV1) is usually 80% or more of predicted. *Moderate persistent asthma* - This category involves daily symptoms and **nighttime awakenings more than once per week but not nightly**. - Lung function (FEV1) in moderate persistent asthma typically falls between 60% and 80% of predicted.

Q: Fibrosis of upper lobe is due to

ABPA. ***ABPA*** - **Allergic bronchopulmonary aspergillosis (ABPA)** is a hypersensitivity reaction to *Aspergillus* species, particularly *A. fumigatus*, which colonize the airways, and commonly leads to **upper lobe fibrosis** and **bronchiectasis**. - The chronic inflammation and recurrent immune responses result in progressive airway damage, characterized on imaging by centrilobular nodules, mucoid impaction, and ultimately **fibrosis in the upper lobes**. Other conditions causing similar upper lobe conglomerate masses include Progressive Massive Fibrosis (PMF) seen in coal worker's pneumoconiosis [1]. *Certain types of pneumonia* - While pneumonia can cause inflammation, it typically leads to **lobar consolidation** or diffuse infiltrates rather than specific upper lobe fibrosis. - **Resolution of pneumonia** usually occurs without significant fibrotic changes, unlike chronic conditions that predispose to fibrosis. *Bronchiectasis* - **Bronchiectasis** is a general term for permanent dilation of the bronchi, which can occur in any lobe, but alone **does not directly cause upper lobe fibrosis** as a primary etiology. - While it often coexists with conditions that cause fibrosis (like ABPA or CF), it's a consequence of airway damage, not the direct cause of the fibrotic process itself; it can however predispose to recurrent infections leading to scarring. *Rheumatoid arthritis* - **Rheumatoid arthritis** can cause interstitial lung disease, including **pulmonary fibrosis**, but it typically manifests as a **basilar or diffuse pattern** rather than predominantly upper lobe fibrosis [2]. - The fibrosis associated with RA-ILD is commonly of a **usual interstitial pneumonia (UIP)** or **non-specific interstitial pneumonia (NSIP)** pattern [2].

Q: Which of the following is used for the diagnosis of asthma?

FEV1. ***FEV1*** - **Forced expiratory volume in 1 second (FEV1)** is the gold standard spirometric parameter for asthma diagnosis - Key diagnostic criteria include: - Reduced **FEV1/FVC ratio** (<0.70 or <0.75-0.80 in adults) - **Bronchodilator reversibility**: ≥12% and ≥200 mL increase in FEV1 after inhaled short-acting β2-agonist - This reversibility distinguishes asthma from fixed obstructive diseases like COPD - Serial **peak expiratory flow (PEF)** monitoring can also demonstrate variability characteristic of asthma *Measurement of tidal volume* - **Tidal volume** measures the amount of air inhaled or exhaled during normal breathing (typically ~500 mL at rest) - Not a diagnostic parameter for asthma as it doesn't assess **airway obstruction** or **hyperresponsiveness** - May be reduced during acute exacerbations but lacks specificity for asthma diagnosis *End expiratory flow rate* - Not a standard diagnostic parameter for asthma - While **mid-expiratory flow rates** (FEF25-75%) and **peak expiratory flow (PEF)** are assessed, **FEV1** remains the primary diagnostic measure - FEV1 provides better reproducibility and standardization for diagnosis *Total lung capacity* - **Total lung capacity (TLC)** represents total lung volume after maximal inhalation - May be normal or increased in asthma due to **air trapping** and hyperinflation - Not used as a primary diagnostic criterion as asthma diagnosis focuses on demonstrating **reversible airflow limitation**, not lung volumes

Q: All are seen in emphysema except which of the following?

Rhonchi. ***Rhonchi*** - **Rhonchi** result from **airflow obstruction** in larger airways, typically heard in conditions like bronchitis or asthma, and are generally *not* a hallmark of emphysema. [2] - While patients with emphysema *can* have co-existing conditions, **rhonchi** are not a primary feature directly attributable to the pathological changes of emphysema itself. *Decreased vital capacity* - Emphysema leads to the destruction of alveolar walls, causing **loss of elastic recoil** and air trapping, which often results in a **reduced vital capacity** as the lungs cannot fully deflate. [1] - The inability to exhale effectively limits the total volume of air that can be exhaled after a maximal inspiration. [3] *Hyperinflation* - The destruction of alveolar walls and loss of elastic recoil in emphysema cause air to become trapped in the lungs, leading to **hyperinflation** (increased total lung capacity and residual volume). [1] - This persistent overdistention of the lungs is a characteristic feature of emphysema, often visible on imaging. *Reduced Dlco* - The **diffusion capacity of the lung for carbon monoxide (DLCO)** is significantly **reduced** in emphysema due to the destruction of the alveolar-capillary membrane. - This destruction decreases the surface area available for gas exchange, impairing the transfer of oxygen into the blood.

Q: 50-year-old male is evaluated for haemoptysis, and his CXR shows a cavitating lesion. All of the following can be the cause for this, except:

Sarcoidosis. ***Sarcoidosis*** - While sarcoidosis can cause lung nodules and cavitations in rare instances, it is **not typically a common cause of cavitating lesions with hemoptysis** [3]. - The classic presentation involves **non-caseating granulomas** affecting multiple organs, with hemoptysis being an unusual symptom [2]. *Aspergilloma* - An **Aspergilloma** often develops in pre-existing lung cavities (e.g., from tuberculosis or sarcoidosis) and is a **well-known cause of hemoptysis** [1], [3]. - The fungal ball can erode into bronchial blood vessels leading to significant bleeding [1]. *Community acquired pneumonia (CAP)* - Severe CAP, particularly that caused by organisms like **Klebsiella pneumoniae** or certain **staphylococci**, can lead to **necrotizing pneumonia with cavitation** and subsequent hemoptysis [1]. - The infection causes tissue destruction, forming abscesses that can cavitate. *Wegener's granulomatosis* - **Wegener's granulomatosis** (now known as Granulomatosis with Polyangiitis) is a systemic vasculitis that commonly affects the lungs, leading to **nodules that frequently cavitate** [2]. - **Hemoptysis** is a common symptom due to the destructive nature of the granulomas and vasculitis [2].

Question 1

What is the best immediate management strategy for a patient experiencing respiratory alkalosis due to anxiety-induced hyperventilation?

Accepted Answer

Rebreathing in paper bag

Answer

IPPV

Answer

Normal saline

Answer

Acetazolamide

Question 2

The physiological marker of the last stage of acute asthma is

Accepted Answer

Increased carbon dioxide levels (Hypercapnia)

Answer

Hypocapnia

Answer

Hyperoxia

Answer

Alkalosis

Question 3

Which of the following statements is true regarding the diagnostic criteria for Chronic Obstructive Pulmonary Disease (COPD)?

Accepted Answer

A post-bronchodilator FEV1/FVC ratio below the threshold indicates airflow limitation.

Answer

A post-bronchodilator FEV1/FVC ratio above the threshold indicates normal lung function.

Answer

Residual Volume (RV) is normal.

Answer

Total Lung Capacity (TLC) is decreased.

Question 4

What is the complete classic triad of findings that defines Young's syndrome?

Accepted Answer

Azoospermia, bronchiectasis, and chronic sinusitis

Answer

Oligospermia, bronchiectasis, and chronic sinusitis

Answer

Azoospermia, asthma, and chronic rhinitis

Answer

Azoospermia, chronic bronchitis, and nasal polyps

Question 5

A person experiences asthma attacks more than twice during the day and at least once during the night. What is the most likely classification of their asthma?

Accepted Answer

Severe persistent asthma

Answer

Intermittent asthma

Answer

Mild persistent asthma

Answer

Moderate persistent asthma

Question 6

Fibrosis of upper lobe is due to

Accepted Answer

ABPA

Answer

Rheumatoid arthritis

Answer

Certain types of pneumonia

Answer

Bronchiectasis

Question 7

Which of the following is used for the diagnosis of asthma?

Accepted Answer

FEV1

Answer

Measurement of tidal volume

Answer

End expiratory flow rate

Answer

Total lung capacity

Question 8

What condition is most likely to cause sudden death or cardiovascular collapse?

Accepted Answer

Obstruction of 60% or more of the pulmonary artery by emboli

Answer

Small pulmonary embolism (less than 30%)

Answer

End artery obliteration (not acute)

Answer

Pulmonary embolism causing obstruction of more than 50% but less than 60% of the pulmonary artery.

Question 9

All are seen in emphysema except which of the following?

Accepted Answer

Rhonchi

Answer

Reduced Dlco

Answer

Decreased vital capacity

Answer

Hyperinflation

Question 10

50-year-old male is evaluated for haemoptysis, and his CXR shows a cavitating lesion. All of the following can be the cause for this, except:

Accepted Answer

Sarcoidosis

Answer

Aspergilloma

Answer

Community acquired pneumonia (CAP)

Answer

Wegener's granulomatosis

Pulmonology — MCQs

Pulmonology — MCQs

On this page

Practice by Chapter

Want unlimited practice?