Respiratory Diseases Practice Questions

Q: A 1.5-year-old girl is admitted to the pediatric ward with cough, fever, and mild hypoxia. At the time of admission, a left upper lobe consolidation is seen on CXR, and Staphylococcus aureus is isolated from blood culture within 24 hours. Suddenly, the child's condition acutely worsens over a few minutes, with marked increases in work of breathing, oxygen requirement, and hypotension. On examination, decreased air entry is noted in the left hemithorax, and heart sounds are more audible on the right side of the chest compared to the left. What is the possible reason for this deterioration?

Tension pneumothorax. ***Tension pneumothorax*** - The sudden deterioration with **marked increases in work of breathing**, oxygen requirement, and **hypotension** strongly suggests a tension pneumothorax. - **Decreased air entry** on the affected side and **shifted heart sounds** (more audible on the right in this case, indicating mediastinal shift away from the left-sided pneumothorax) are classic signs of tension pneumothorax. - Staphylococcus aureus pneumonia commonly causes **pneumatoceles** (thin-walled air-filled cysts) which can rupture, leading to pneumothorax - a well-recognized complication in pediatric staphylococcal pneumonia. *Empyema* - Empyema is the accumulation of **pus in the pleural space** and would cause persistent fever and worsening respiratory status, but not typically such a rapid, acute, and dramatic deterioration with hemodynamic instability over minutes. - While it can cause decreased breath sounds and dullness to percussion, it wouldn't typically cause acute mediastinal shift and hypotension in minutes like a tension pneumothorax. *Acute Respiratory Distress Syndrome (ARDS)* - ARDS is characterized by **bilateral pulmonary infiltrates** and severe hypoxemia, which would cause significant respiratory distress, but its onset is typically less acute and sudden in a matter of minutes. - While ARDS involves worsening respiratory status, it doesn't typically present with immediate, dramatic **mediastinal shift** and acute circulatory collapse as seen here. *Pleural effusion* - A pleural effusion is an accumulation of fluid in the pleural space and would cause **decreased breath sounds** and dullness to percussion on the affected side, and it can cause respiratory distress. - Although it can cause some mediastinal shift if it's large, it would not typically cause such an **acute and rapid hemodynamic collapse** and dramatic deterioration over minutes, as described.

Q: A 10-month-old child weighing 5 kg and measuring 65 cm in length presents with cough and cold. He has a respiratory rate of 48 per minute, with no retractions, grunting, or cyanosis. There is no history of convulsions. Which statement is true?

No pneumonia, only cough and cold. **_No pneumonia, only cough and cold_** - The child's respiratory rate of 48 breaths per minute is within the normal range for a 10-month-old child, where a respiratory rate **less than 50 breaths per minute** is considered normal. - The absence of **retractions, grunting, or cyanosis** further indicates no signs of respiratory distress or severe illness. *The child may have pneumonia* - The child does not meet the criteria for pneumonia, as there is **no fast breathing** (respiratory rate below 50/min) and **no signs of chest indrawing**. - Pneumonia would typically involve a significantly **elevated respiratory rate** for the child's age or signs of severe respiratory distress. *The child has severe pneumonia* - Severe pneumonia is characterized by signs such as **chest indrawing**, deep or labored breathing, or symptoms like inability to drink, convulsions, or lethargy none of which are present. - A respiratory rate of 48/min is not considered fast breathing for this age group, ruling out even non-severe pneumonia based on respiratory rate criterion. *The child has very severe disease* - Very severe disease would manifest with critical signs like **cyanosis**, inability to breastfeed or drink, repeated vomiting, or convulsions, none of which are exhibited by the child. - The child's symptoms are limited to a cough and cold without any alarming signs, suggesting a mild, uncomplicated illness.

Q: A 2-month-old child with a birth weight of 2 kg presents with poor feeding, excessive sleepiness, and wheezing. What is the most likely diagnosis?

Bronchiolitis. ***Bronchiolitis*** - This presentation in a 2-month-old, especially with a history of **low birth weight**, points to bronchiolitis, characterized by **poor feeding**, **excessive sleepiness**, and **wheezing**. - **Bronchiolitis** primarily affects infants under 2 years (peak 2-6 months) and presents with signs of **lower respiratory tract involvement** including wheezing, tachypnea, and respiratory distress, which can lead to fatigue and feeding difficulties. - The **wheezing** is the key distinguishing feature indicating **small airway inflammation** typical of bronchiolitis. *Incorrect: Viral upper respiratory tract infection* - While viral URTI can cause nasal congestion and rhinorrhea, it typically affects the **upper airways** (nose, pharynx). - **Wheezing** indicates **lower airway involvement**, making bronchiolitis more likely than simple URTI. - The combination of systemic symptoms (poor feeding, excessive sleepiness) with wheezing suggests more significant lower respiratory disease. *Incorrect: Severe pneumonia* - Though severe pneumonia can cause similar systemic symptoms, **crackles or rales** are more characteristic than **wheezing**. - Pneumonia typically presents with **fever**, **cough**, and **focal consolidation** on examination. - The predominant **wheezing** in this case points more toward bronchiolitis with its diffuse small airway involvement. *Incorrect: Congestive heart failure* - CHF is an important differential in low birth weight infants with poor feeding and respiratory distress. - However, CHF typically presents with **tachycardia**, **hepatomegaly**, **gallop rhythm**, and **bilateral crackles** rather than prominent wheezing. - The **wheezing** without cardiac signs makes bronchiolitis more likely than a primary cardiac cause.

Q: What is the recommended position of a child during an asthmatic attack?

Semi erect. ***Semi erect*** - A **semi-erect or sitting position** (also called the orthopneic position) is the recommended position for children during an asthmatic attack. - This position optimizes **lung expansion**, facilitates use of accessory muscles of respiration, and reduces the work of breathing. - The forward-leaning posture helps to **relieve dyspnea** and is the position most children naturally adopt during respiratory distress. *Supine* - Lying flat on the back **worsens breathing difficulty** by allowing abdominal contents to push against the diaphragm, restricting lung expansion. - This position increases respiratory effort and may worsen **hypoxemia**. - It also increases the risk of **aspiration** if the child coughs or vomits. *Erect* - While a fully upright sitting position is also helpful for breathing, the term **"semi-erect"** or **"sitting"** is more commonly used in clinical guidelines and textbooks when describing the optimal position for acute asthma. - Both positions are acceptable in practice, but "semi-erect" is the preferred terminology as it encompasses the natural forward-leaning posture children adopt during respiratory distress. *Trendelenburg* - In the **Trendelenburg position**, the head is lower than the feet, which **significantly worsens respiratory distress** by increasing pressure on the diaphragm. - This position is contraindicated in asthma and is used for specific conditions such as **hypotensive shock** or during certain surgical procedures, not for respiratory compromise.

Question 1

A 1.5-year-old girl is admitted to the pediatric ward with cough, fever, and mild hypoxia. At the time of admission, a left upper lobe consolidation is seen on CXR, and Staphylococcus aureus is isolated from blood culture within 24 hours. Suddenly, the child's condition acutely worsens over a few minutes, with marked increases in work of breathing, oxygen requirement, and hypotension. On examination, decreased air entry is noted in the left hemithorax, and heart sounds are more audible on the right side of the chest compared to the left. What is the possible reason for this deterioration?

Accepted Answer

Tension pneumothorax

Answer

Empyema

Answer

Acute Respiratory Distress Syndrome (ARDS)

Answer

Pleural effusion

Question 2

A 10-month-old child weighing 5 kg and measuring 65 cm in length presents with cough and cold. He has a respiratory rate of 48 per minute, with no retractions, grunting, or cyanosis. There is no history of convulsions. Which statement is true?

Accepted Answer

No pneumonia, only cough and cold

Answer

The child may have pneumonia

Answer

The child has severe pneumonia

Answer

The child has very severe disease

Question 3

A 2-month-old child with a birth weight of 2 kg presents with poor feeding, excessive sleepiness, and wheezing. What is the most likely diagnosis?

Accepted Answer

Bronchiolitis

Answer

Viral upper respiratory tract infection

Answer

Severe pneumonia

Answer

Congestive heart failure

Question 4

What is the recommended position of a child during an asthmatic attack?

Accepted Answer

Semi erect

Answer

Supine

Answer

Erect

Answer

Trendelenburg

Respiratory Diseases — MCQs

Respiratory Diseases — MCQs

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