Test on Bronchiectasis: Causes, Diagnosis, and Treatment

Question 1: Systemic autoimmune diseases primarily lead to bronchiectasis through localized inflammation that originates directly in the airways.

A. Ano

B. Ne

Explanation: Systemic autoimmune diseases cause bronchiectasis because the inflammation is systemic, not localized, and it damages the lung tissue as an adverse effect. This process is due to chronic systemic inflammation.

Question 2: Which of the following conditions is directly associated with a weakened immune system, leading to recurrent infections that can cause bronchiectasis?

A. Cystic fibrosis

B. Hypogammaglobulinemia

C. Primary ciliary dyskinesia

D. Allergic bronchopulmonary aspergillosis

Explanation: The study materials state that if a patient has a reduction in immune function to clear bacteria, such as decreased T cells or reduced numbers of Ig antibodies, they are unable to fight off infections. Hypogammaglobulinemia is explicitly mentioned as a hereditary immunodeficiency where Ig antibodies are reduced, leading to tissue destruction and increased mucus production, which propagates bronchiectasis. Cystic fibrosis, primary ciliary dyskinesia, and allergic bronchopulmonary aspergillosis are mentioned as causes of bronchiectasis, but they are not primarily described as conditions resulting from a general weakened immune system leading to recurrent infections, as is the case for hypogammaglobulinemia.

Question 3: In bronchiectasis, airway obstruction leading to hyperinflation primarily causes patients to efficiently clear CO2 from their lungs.

A. Ano

B. Ne

Explanation: Airway obstruction in bronchiectasis causes hyperinflation, which makes it difficult to get CO2 out. This leads to hypoventilation, resulting in very high CO2 levels (hypercapnia), not efficient clearance.

Question 4: Chronic hypoxemia in patients with bronchiectasis can lead to pulmonary hypertension.

A. Ano

B. Ne

Explanation: Patients with bronchiectasis often experience chronic hypoxemia due to hypoventilation and VQ mismatch. This chronic hypoxemia leads to hypoxic vasoconstriction, which increases resistance and pressure in the pulmonary arteries, resulting in pulmonary hypertension.

Question 5: According to the study materials, what is the primary cause of hemoptysis in patients with bronchiectasis?

A. Increased pressure in the pulmonary arteries.

B. Chronic inflammation leading to bronchial artery ulceration.

C. Mucus plugs obstructing the airways.

D. Hypoventilation and subsequent hypoxemia.

Explanation: The study materials state that hemoptysis in bronchiectasis is caused by chronic inflammation over time eroding and eating away at the vessel wall, leading to mucosal erosions and bronchial artery ulceration. The bronchial arteries are noted as the most common cause of bleeding.