Pulmonology Practice Questions

Q: In an ICU setting, patients suffering from which respiratory pathology are at risk of CO2 narcosis?

Emphysema. ***Emphysema*** - Patients with **emphysema** often have chronic **CO2 retention** due to impaired gas exchange and reduced expiratory airflow, making them susceptible to CO2 narcosis with supplemental oxygen [4]. - Their **respiratory drive** is primarily cued by hypoxic stimulation, and increasing oxygen can suppress this drive, leading to further CO2 accumulation [1], [4]. *Pneumonia* - While pneumonia can cause respiratory distress, it typically leads to **hypoxemia** rather than hypercapnia in early stages, as ventilation-perfusion mismatch is the primary issue [3]. - Patients with pneumonia are not inherently predisposed to **CO2 narcosis** unless there is severe underlying lung disease or muscle fatigue. *Asthma* - Acute asthma exacerbations mainly cause **bronchoconstriction** and **air trapping**, leading to hypoxemia. Hypercapnia only occurs in severe, life-threatening asthma with significant respiratory muscle fatigue or impending respiratory failure [2]. - Patients with asthma are generally not at chronic risk of **CO2 narcosis** unless in an acute, severe episode and over-oxygenated. *Bronchiectasis* - Bronchiectasis involves **permanent dilation of bronchi** due to chronic infection and inflammation, leading to impaired mucociliary clearance and recurrent infections. - While it can cause chronic respiratory symptoms and hypoxemia, it typically does not directly lead to **CO2 retention** to the extent seen in advanced COPD, unless there is significant co-existing lung parenchymal damage.

Q: Brock's syndrome is associated with which lobe of the lung?

Middle lobe of the right lung. ***Middle lobe of the right lung*** - **Brock's syndrome** specifically refers to chronic or recurrent collapse/consolidation of the **right middle lobe**. [1] - It is often caused by **bronchial obstruction** due to compression from enlarged lymph nodes or recurrent infections. [2] *Lower lobe of the right lung* - While other conditions can affect the **right lower lobe**, it is not specifically associated with Brock's syndrome. - Collapse or consolidation in this lobe would typically be referred to by its anatomical location rather than this eponymous syndrome. *Upper lobe of the left lung* - Conditions affecting the **left upper lobe** have distinct etiologies and are not designated as Brock's syndrome. [3] - This lobe is frequently affected in **tuberculosis** and other specific pathologies. *Lower lobe of the left lung* - The **left lower lobe** is a common site for various pulmonary pathologies but not for Brock's syndrome. - Its involvement typically points towards different diagnostic considerations.

Q: In allergic bronchopulmonary aspergillosis, where are the lesions primarily located?

Bronchi and bronchioles. In allergic bronchopulmonary aspergillosis, where are the lesions primarily located? ***Bronchi and bronchioles*** - Allergic bronchopulmonary aspergillosis primarily affects the **airways**, particularly the **bronchi and bronchioles**, due to the hypersensitivity reaction to the Aspergillus species. - It leads to **mucous plugging** and inflammatory changes in these structures, resulting in symptoms like **cough** and **wheeze**. *All of the above* - This option is incorrect as lesions are not typically found in all structures; ABPA specifically targets the **airways**. - The disease's hallmark features are localized to the **bronchi and bronchioles**, making this option misleading. *Pleura* - While pleural involvement can occur in other pulmonary diseases, it is not characteristic of **allergic bronchopulmonary aspergillosis**. - ABPA does not typically cause **pleural effusions** or lesions in the pleura, focusing instead on airway pathology. *Alveoli* - In ABPA, the primary lesions do not occur in the **alveoli**, but rather in the **airway passages**. - While lung inflammation can affect the alveoli in other contexts, it is not a specific feature of this condition.

Q: Pink puffers are typically associated with which condition?

Emphysema. ***Emphysema*** - Patients with **emphysema** are often referred to as "pink puffers" because they maintain relatively normal arterial oxygen tension (pink) by **pursing their lips** and using accessory muscles to forcefully exhale (puffing) [1]. - This effort to maintain adequate oxygenation and ventilation, despite severe airflow obstruction, differentiates them from "blue bloaters" [1]. - In emphysema, the loss of alveolar walls leaves small airways unsupported, which contributes to air trapping and increased expiratory effort [2]. *Chronic bronchitis* - Patients with **chronic bronchitis** are classically described as "blue bloaters" due to **hypoxemia** (causing cyanosis or "blueness") and often present with **edema** from right heart failure (bloating) [1]. - They typically have a prominent cough with **sputum production** and less respiratory distress at rest compared to emphysema patients [1]. *Pneumonia* - **Pneumonia** is an acute infection of the lung parenchyma characterized by **fever**, cough, and **dyspnea**, and does not fit the long-term clinical phenotype of "pink puffer." - It typically causes an **influx of inflammatory cells** and fluid into the alveoli, leading to impaired gas exchange. *Bronchiectasis* - **Bronchiectasis** is characterized by **permanent dilation of the bronchi** and is often associated with chronic productive cough and recurrent infections. - While it can cause chronic respiratory symptoms, it does not typically present with the "pink puffer" phenotype associated with the specific compensatory mechanisms seen in emphysema.

Q: Which of the following is least likely to cause a cavity in the lungs?

Sarcoidosis. ***Sarcoidosis*** - Sarcoidosis typically leads to **granuloma formation** in the lungs rather than cavitary lesions [1]. - It usually presents with **bilateral hilar lymphadenopathy** and interstitial lung disease, not lung cavities [1]. *Wegeners* - Wegeners (now called Granulomatosis with Polyangiitis) can cause lung cavities due to **vascular inflammation** [1]. - It typically presents with **pulmonary nodules** that may cavitate and is associated with **renal involvement** [1]. *Hydatid* - Hydatid disease is caused by **Echinococcus** species and can result in cyst formation in the lungs that may become infected and develop cavities. - The cavitary lesions are often due to secondary infections of the cysts. *Staphylococcus* - Staphylococcus can lead to lung abscesses which may cavitate, particularly in cases of **pneumonia** or **aspiration**. - It is commonly associated with **necrotizing pneumonia** and empyema, resulting in cavitary lesions.

Q: Treatment of choice in acute sarcoidosis is

Prednisolone. ***Prednisolone*** - **Corticosteroids** like prednisolone are the first-line treatment for acute sarcoidosis due to their potent **anti-inflammatory** and **immunosuppressive** effects. - They effectively reduce granuloma formation and inflammation, alleviating symptoms and preventing organ damage [1]. *Cyclosporin* - Cyclosporine is an **immunosuppressant** used in some autoimmune diseases and organ transplantation but is not the primary treatment for acute sarcoidosis. - It carries significant side effects, including **nephrotoxicity** and increased infection risk. *Infliximab* - Infliximab is a **TNF-alpha inhibitor** used for chronic, refractory sarcoidosis or in cases where steroids are contraindicated or ineffective. - It is considered a second-line or third-line agent, not the treatment of choice for acute presentation. *IV immunoglobulins* - IV immunoglobulins (IVIG) are used for various **immune deficiencies** and certain autoimmune disorders. - They are not indicated for the initial management of acute sarcoidosis.

Q: Which of the following conditions is primarily associated with alveolar hypoventilation?

Kyphoscoliosis. ***Kyphoscoliosis*** - **Severe kyphoscoliosis** can restrict lung expansion and thoracic cage movement, leading to **reduced tidal volume** and respiratory muscle fatigue, resulting in **alveolar hypoventilation**. [1] - The abnormal curvature of the spine mechanically impedes efficient ventilation, primarily impacting the ability to take deep breaths and clear CO2. *COPD* - While patients with **severe COPD** can develop hypoventilation, it is primarily characterized by **airway obstruction** and **ventilation-perfusion mismatch** rather than being a primary cause of hypoventilation like restrictive disorders. [1] - Initial stages often involve hyperinflation and increased work of breathing, but not necessarily alveolar hypoventilation as the primary feature. *Lobar pneumonia* - **Lobar pneumonia** causes **consolidation** of lung tissue, leading to V/Q mismatch and hypoxemia. [2] - It typically results in *hyperventilation* due to hypoxaemia and inflammation, rather than alveolar hypoventilation. [2] *Bulbar poliomyelitis* - **Bulbar poliomyelitis** affects the motor neurons of the brainstem, leading to weakness of the muscles involved in swallowing and breathing. - While it can cause respiratory failure, its primary association is with direct paralysis of respiratory muscles rather than a structural respiratory compromise like kyphoscoliosis. *Central sleep apnea* - **Central sleep apnea** involves a temporary cessation of breathing efforts due to a lack of neural output from the brainstem. - It is a disorder of respiratory control during sleep and not primarily associated with daytime alveolar hypoventilation due to a structural chest wall defect.

Q: An Adult with asthma presents with asthma symptoms every day and wakes up in the night approximately 2 to 3 days in a week. He can be classified as having :

Moderate Persistent Asthma. ***Moderate Persistent Asthma*** - This classification is characterized by **daily asthma symptoms** [1] and **nighttime awakenings occurring 3-4 times per week**. The patient's symptoms fit this description. - The patient's presentation of daily symptoms and 2-3 nighttime awakenings per week indicates a level of severity that surpasses mild persistent asthma but does not meet the criteria for severe persistent asthma [1]. *Intermittent Asthma* - This classification involves symptoms less than **twice a week** and nighttime awakenings less than **twice a month**. - The patient's symptoms are daily, which exceeds the criteria for intermittent asthma. *Mild Persistent Asthma* - This type features symptoms more than **twice a week** but less than **daily**, and nighttime awakenings occurring 3-4 times per month [1]. - The patient experiences daily symptoms, which is more frequent than what is seen in mild persistent asthma. *Severe Persistent Asthma* - This classification involves symptoms throughout the **day** and nighttime awakenings **every night** or multiple times a week (7 nights/week). Also, the patient has a very limited activity level. - While the patient has daily symptoms, the frequency of nighttime awakenings is not severe enough to be classified as severe persistent asthma.

Q: Upper lobe bronchiectasis is seen in which disease?

Cystic fibrosis. ***Cystic fibrosis*** - **Cystic fibrosis (CF)** classically affects the upper lobes due to poor mucociliary clearance in these areas, leading to recurrent infections and subsequent bronchiectasis. - The abnormal **CFTR protein** causes thick, sticky mucus that obstructs airways, making them susceptible to damage and dilation. *Tuberculosis* - While **post-primary tuberculosis** can cause cavitation and fibrosis in the upper lobes, leading to some degree of bronchiectasis, it's not the primary or classical cause of widespread upper lobe bronchiectasis like CF. - The mechanism is typically related to **tissue destruction** and fibrosis during healing, rather than primary mucociliary dysfunction. *Allergic Bronchopulmonary Aspergillosis (ABPA)* - **ABPA** can cause central bronchiectasis, often affecting the upper lobes, due to an allergic reaction to *Aspergillus* colonizing the airways. - However, the bronchiectasis in ABPA is typically **central and mucoid impaction-related**, in contrast to the diffuse pattern seen in CF. *Silicosis* - **Silicosis** typically leads to **nodular fibrotic changes** in the upper and mid-lung zones and can cause progressive massive fibrosis. - While it can indirectly lead to some airway distortion or traction bronchiectasis due to severe fibrosis, it is not primarily characterized by bronchiectasis as a prominent feature.

Question 1

Which of the following is a common cause of respiratory failure in the immediate post-operative period?

Accepted Answer

Kyphoscoliosis causing Type 2 respiratory failure due to restrictive lung disease and hypoventilation

Answer

Post-operative atelectasis causing Type 1 respiratory failure due to ventilation-perfusion mismatch

Answer

Pulmonary fibrosis causing Type 1 respiratory failure due to impaired gas diffusion

Answer

Flail chest causing Type 1 respiratory failure due to chest wall instability and ventilation-perfusion mismatch

Question 2

In an ICU setting, patients suffering from which respiratory pathology are at risk of CO2 narcosis?

Accepted Answer

Emphysema

Answer

Pneumonia

Answer

Asthma

Answer

Bronchiectasis

Question 3

Brock's syndrome is associated with which lobe of the lung?

Accepted Answer

Middle lobe of the right lung

Answer

Lower lobe of the right lung

Answer

Upper lobe of the left lung

Answer

Lower lobe of the left lung

Question 4

In allergic bronchopulmonary aspergillosis, where are the lesions primarily located?

Accepted Answer

Bronchi and bronchioles

Answer

None of the options

Answer

Pleura

Answer

Alveoli

Question 5

Pink puffers are typically associated with which condition?

Accepted Answer

Emphysema

Answer

Chronic bronchitis

Answer

Pneumonia

Answer

Bronchiectasis

Question 6

Which of the following is least likely to cause a cavity in the lungs?

Accepted Answer

Sarcoidosis

Answer

Granulomatosis with Polyangiitis (GPA)

Answer

Tuberculosis

Answer

Staphylococcus aureus pneumonia

Question 7

Treatment of choice in acute sarcoidosis is

Accepted Answer

Prednisolone

Answer

Cyclosporin

Answer

Infliximab

Answer

IV immunoglobulins

Question 8

Which of the following conditions is primarily associated with alveolar hypoventilation?

Accepted Answer

Kyphoscoliosis

Answer

COPD

Answer

Lobar pneumonia

Answer

Bulbar poliomyelitis

Answer

Bulbar poliomyelitis

Answer

Central sleep apnea

Question 9

An Adult with asthma presents with asthma symptoms every day and wakes up in the night approximately 2 to 3 days in a week. He can be classified as having :

Accepted Answer

Moderate Persistent Asthma

Answer

Intermittent Asthma

Answer

Mild Persistent Asthma

Answer

Severe Persistent Asthma

Question 10

Upper lobe bronchiectasis is seen in which disease?

Accepted Answer

Cystic fibrosis

Answer

Tuberculosis

Answer

Allergic Bronchopulmonary Aspergillosis (ABPA)

Answer

Silicosis

Pulmonology — MCQs

Pulmonology — MCQs

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