Compliance US Medical PG Practice Questions and MCQs
Practice US Medical PG questions for Compliance. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Compliance US Medical PG Question 1: A previously healthy 35-year-old woman is brought into the emergency department after being found unresponsive by her husband. Her husband finds an empty bottle of diazepam tablets in her pocket. She is stuporous. At the hospital, her blood pressure is 90/40 mm Hg, the pulse is 58/min, and the respirations are 6/min. The examination of the pupils shows normal size and reactivity to light. Deep tendon reflexes are 1+ bilaterally. Babinski sign is absent. All 4 extremities are hypotonic. The patient is intubated and taken to the critical care unit for mechanical ventilation and treatment. Regarding the prevention of pneumonia in this patient, which of the following strategies is most likely to achieve this goal?
- A. Nasogastric tube insertion
- B. Daily evaluation for ventilator weaning
- C. Subglottic drainage of secretions (Correct Answer)
- D. Oropharynx and gut antibacterial decontamination
- E. Prone positioning during mechanical ventilation
Compliance Explanation: ***Subglottic drainage of secretions***
- This is a highly effective strategy to prevent **ventilator-associated pneumonia (VAP)** by continuously removing secretions that pool above the endotracheal tube cuff before they can be aspirated.
- Endotracheal tubes with a **subglottic secretion drainage port** reduce VAP incidence by preventing microaspiration of contaminated oropharyngeal secretions into the lower respiratory tract.
- This is a **specific mechanical intervention** that directly addresses one of the key pathogenic mechanisms of VAP.
*Nasogastric tube insertion*
- While an NG tube may be needed for feeding or gastric decompression, it does not directly prevent VAP and may **increase aspiration risk** by compromising the lower esophageal sphincter.
- NG tubes can promote gastroesophageal reflux and provide a conduit for bacterial migration.
*Daily evaluation for ventilator weaning*
- This is also a **critical component of VAP prevention** as part of the ventilator bundle, since reducing duration of mechanical ventilation is the most effective overall strategy to prevent VAP.
- However, in this question asking for a strategy to prevent pneumonia in an intubated patient, subglottic drainage is the more specific technical intervention, whereas daily weaning assessment is a broader protocol that reduces exposure time.
- Both strategies are important; subglottic drainage addresses the "how" of prevention during intubation, while weaning protocols address the "duration" of risk exposure.
*Oropharynx and gut antibacterial decontamination*
- Selective digestive decontamination (SDD) aims to reduce bacterial colonization, but evidence for routine use is mixed and raises concerns about **antimicrobial resistance**.
- Not universally recommended as a primary VAP prevention strategy in most guidelines.
*Prone positioning during mechanical ventilation*
- **Prone positioning** is primarily indicated for improving oxygenation in **Acute Respiratory Distress Syndrome (ARDS)**, not for VAP prevention.
- While it may improve secretion drainage, it is not a standard VAP prevention measure and carries its own risks and logistical challenges.
Compliance US Medical PG Question 2: A 60-year-old woman presents to the clinic with a 3-month history of shortness of breath that worsens on exertion. She also complains of chronic cough that has lasted for 10 years. Her symptoms are worsened even with light activities like climbing up a flight of stairs. She denies any weight loss, lightheadedness, or fever. Her medical history is significant for hypertension, for which she takes amlodipine daily. She has a 70-pack-year history of cigarette smoking and drinks 3–4 alcoholic beverages per week. Her blood pressure today is 128/84 mm Hg. A chest X-ray shows flattening of the diaphragm bilaterally. Physical examination is notable for coarse wheezing bilaterally. Which of the following is likely to be seen with pulmonary function testing?
- A. Decreased FEV1: FVC and decreased total lung capacity
- B. Normal FEV1: FVC and decreased total lung capacity
- C. Increased FEV1: FVC and decreased total lung capacity
- D. Decreased FEV1: FVC and increased total lung capacity (Correct Answer)
- E. Increased FEV1: FVC and normal total lung capacity
Compliance Explanation: ***Decreased FEV1:FVC ratio and increased total lung capacity***
- This patient's symptoms (shortness of breath on exertion, chronic cough, 70-pack-year smoking history, coarse wheezing, and diaphragmatic flattening on X-ray) are highly suggestive of **Chronic Obstructive Pulmonary Disease (COPD)**, specifically **emphysema**, an obstructive lung disease.
- In COPD, there is airflow limitation, causing a **decreased FEV1:FVC ratio** (typically <0.70). Over time, air trapping occurs due to damaged alveoli and loss of elastic recoil, leading to an **increased total lung capacity (TLC)** and residual volume.
*Decreased FEV1:FVC ratio and decreased total lung capacity*
- A **decreased FEV1:FVC ratio** indicates an **obstructive lung disease**.
- However, a **decreased total lung capacity (TLC)** is characteristic of a **restrictive lung disease**, which does not align with the patient's presentation typical of COPD/emphysema.
*Normal FEV1:FVC ratio and decreased total lung capacity*
- A **normal FEV1:FVC ratio** is inconsistent with the patient's strong history of smoking and symptoms suggestive of airflow obstruction.
- A **decreased total lung capacity (TLC)** indicates a restrictive lung disease, which is not the primary diagnosis here.
*Increased FEV1:FVC ratio and decreased total lung capacity*
- An **increased FEV1:FVC ratio** is not physiologically possible in significant lung disease and is therefore incorrect.
- A **decreased total lung capacity (TLC)** would point towards a restrictive pattern not seen in generalized emphysema.
*Increased FEV1:FVC ratio and normal total lung capacity*
- An **increased FEV1:FVC ratio** is not a characteristic finding in any lung disease and is therefore incorrect.
- A **normal total lung capacity** would not be expected in advanced emphysema where air trapping is prominent.
Compliance US Medical PG Question 3: A previously healthy 64-year-old woman comes to the physician because of a dry cough and progressively worsening shortness of breath for the past 2 months. She has not had fever, chills, or night sweats. She has smoked one pack of cigarettes daily for the past 45 years. She appears thin. Examination of the lung shows a prolonged expiratory phase and end-expiratory wheezing. Spirometry shows decreased FEV1:FVC ratio (< 70% predicted), decreased FEV1, and a total lung capacity of 125% of predicted. The diffusion capacity of the lung (DLCO) is decreased. Which of the following is the most likely diagnosis?
- A. Bronchiectasis
- B. Interstitial lung disease
- C. Chronic obstructive pulmonary disease (Correct Answer)
- D. Hypersensitivity pneumonitis
- E. Bronchial asthma
Compliance Explanation: ***Chronic obstructive pulmonary disease***
- The patient's long history of **smoking (45 pack-years)**, **prolonged expiratory phase**, and **end-expiratory wheezing** are classic signs of airway obstruction.
- Spirometry findings of a **decreased FEV1:FVC ratio** (< 70% predicted), **decreased FEV1**, **increased total lung capacity (TLC)**, and **decreased DLCO** are all highly indicative of **emphysema**, a subtype of COPD.
*Bronchiectasis*
- While it shares symptoms like cough and SOB, **bronchiectasis** is characterized by permanent **dilatation of bronchi** and profuse, chronic **sputum production**, which is not mentioned here.
- Spirometry typically shows **obstructive patterns**, but the marked increase in TLC and decreased DLCO are more specific to emphysema.
*Interstitial lung disease*
- This condition primarily causes a **restrictive lung pattern**, meaning a decreased TLC and normal or increased FEV1:FVC ratio.
- The patient's **increased TLC** and **obstructive spirometry** rule out a purely restrictive process.
*Hypersensitivity pneumonitis*
- This is an inflammatory response to inhaled antigens, often presenting with **recurrent episodes** of fever, chills, and cough, and can lead to restrictive physiology.
- The patient lacks a history of specific **antigen exposure** and presents with an obstructive pattern and increased TLC.
*Bronchial asthma*
- While asthma shares obstructive features like wheezing and a decreased FEV1:FVC ratio, it is characterized by **reversibility** of airway obstruction and typically does not cause a significantly **elevated TLC** or **decreased DLCO** in uncomplicated cases.
- The patient's long smoking history points away from asthma as the primary diagnosis.
Compliance US Medical PG Question 4: A 25-year-old previously healthy woman is admitted to the hospital with progressively worsening shortness of breath. She reports a mild fever. Her vital signs at the admission are as follows: blood pressure 100/70 mm Hg, heart rate 111/min, respiratory rate 20/min, and temperature 38.1℃ (100.6℉); blood saturation on room air is 90%. Examination reveals a bilateral decrease of vesicular breath sounds and rales in the lower lobes. Plain chest radiograph demonstrates bilateral opacification of the lower lobes. Despite appropriate treatment, her respiratory status worsens. The patient is transferred to the intensive care unit and put on mechanical ventilation. Adjustment of which of the following ventilator settings will only affect the patient’s oxygenation?
- A. Tidal volume and respiratory rate
- B. FiO2 and PEEP (Correct Answer)
- C. Respiratory rate and PEEP
- D. Tidal volume and FiO2
- E. FiO2 and respiratory rate
Compliance Explanation: ***FiO2 and PEEP***
- **FiO2 (fraction of inspired oxygen)** directly controls the oxygen concentration delivered to the patient, thus solely impacting **oxygenation**.
- **PEEP (positive end-expiratory pressure)** prevents alveolar collapse and recruits collapsed alveoli, improving the **functional residual capacity** and thus **oxygenation** without significantly altering CO2 removal (ventilation).
*Tidal volume and respiratory rate*
- **Tidal volume (Vt)** directly impacts the amount of air moved with each breath, primarily affecting **ventilation** (CO2 removal).
- **Respiratory rate (RR)** also directly determines the total minute ventilation, thus influencing **ventilation** more than oxygenation.
*Respiratory rate and PEEP*
- As mentioned, **respiratory rate** significantly affects **ventilation** by altering minute ventilation (Vt x RR).
- While **PEEP** primarily affects oxygenation, the combination with respiratory rate means it's not exclusively targeting oxygenation.
*Tidal volume and FiO2*
- **Tidal volume** is a key determinant of **ventilation** (CO2 removal), not solely oxygenation.
- **FiO2** does affect oxygenation, but its combination with tidal volume makes this option incorrect for *only* affecting oxygenation.
*FiO2 and respiratory rate*
- **FiO2** directly impacts **oxygenation**.
- **Respiratory rate** primarily affects **ventilation** (CO2 removal), thereby influencing carbonic acid levels and pH.
Compliance US Medical PG Question 5: A 57-year-old man comes to the physician because of a 2-year history of fatigue, worsening shortness of breath, and a productive cough for 2 years. He has smoked 1 pack of cigarettes daily for the past 40 years. Examination shows pursed-lip breathing and an increased anteroposterior chest diameter. There is diffuse wheezing bilaterally and breath sounds are distant. Which of the following parameters is most likely to be decreased in this patient?
- A. Thickness of small airways
- B. Work of breathing
- C. Lung elastic recoil (Correct Answer)
- D. Lower airway resistance
- E. Pulmonary vascular pressure
Compliance Explanation: ***Lung elastic recoil***
- The patient's presentation (long smoking history, dyspnea, pursed-lip breathing, increased AP diameter, distant breath sounds, and wheezing) is classic for **emphysema**, a form of **COPD**.
- Emphysema involves the destruction of **alveolar walls** and **elastic fibers**, leading to a significant decrease in the lung's ability to passively recoil during expiration.
*Thickness of small airways*
- In COPD, particularly chronic bronchitis, there is often **inflammation and thickening of the small airways** due to goblet cell hyperplasia and mucus gland hypertrophy, increasing their thickness, not decreasing it.
- This thickening contributes to increased airway resistance.
*Work of breathing*
- The **destruction of elastic recoil** in emphysema means the patient must actively use accessory muscles to exhale, significantly **increasing the work of breathing**, which is evident from pursed-lip breathing.
- Patients with COPD expend much more energy to breathe than healthy individuals.
*Lower airway resistance*
- Emphysema, while characterized by alveolar destruction, also has an obstructive component due to **airway collapse during expiration** (loss of radial traction) and potential inflammation/mucus, which leads to **increased lower airway resistance**, not decreased resistance.
- This increased resistance contributes to air trapping and wheezing.
*Pulmonary vascular pressure*
- Chronic hypoxia resulting from severe COPD can lead to **pulmonary vasoconstriction** and remodeling of the pulmonary arteries, causing **pulmonary hypertension** and an increase in pulmonary vascular pressure.
- This is a common complication in advanced COPD, not a decreased parameter.
More Compliance US Medical PG questions available in the OnCourse app. Practice MCQs, flashcards, and get detailed explanations.
