A 48-year-old man presents with a productive cough and occasional dyspnea on exertion. He has experienced these symptoms for the past 6 years. Patient denies weight loss, night sweats, or hemoptysis. Past medical history is significant for arterial hypertension, diagnosed 3 years ago, and diabetes mellitus type 2, diagnosed 5 years ago. He also has allergic rhinitis with exacerbations in the spring. The current medications include 12.5 mg of lisinopril and 1,000 mg of metformin daily. The patient reports a 30-pack-year smoking history. He works as a financial advisor and is physically inactive. The vital signs are within normal limits. The BMI is 44.9 kg/m2. Upon physical examination, lung auscultation is significant for occasional wheezes over both lungs. The spirometry shows an FEV1 of 59% of predicted. Which of the following interventions would be most useful to slow the progression of this patient’s most likely condition?

Identifying and avoiding contact with an allergen

A 36-year-old woman comes to the physician because of a 3-month history of intermittent cough productive of thick, yellow phlegm and increasing shortness of breath. She especially becomes short of breath while playing with her children. She has worked as a farmer for 18 years. She has asthma treated with a salbutamol inhaler. She has smoked half a pack of cigarettes daily for 12 years. Her pulse is 65/min, respirations are 14/min, and blood pressure is 110/75 mm Hg. Scattered wheezing and decreased breath sounds are heard throughout both lung fields. Cardiac examination shows no abnormalities. The abdomen is soft and nondistended; liver span in midclavicular line is 14 cm.Spirometry shows a FEV1:FVC ratio of 66% and a FEV1 of 50% of predicted. An x-ray of the chest is shown. Which of the following is the most likely underlying cause of this patient's condition?

Chronic obstructive lung disease

Constrictive bronchiolitis obliterans

A 68-year-old man presents with shortness of breath, particularly when walking up stairs and when lying down to go to sleep at night. He also complains of a chronic cough and states that he now uses 2 extra pillows at night. The patient has a history of type 2 diabetes that is well-managed with metformin. He also takes Prozac for a long-standing history of depression. The patient has a 60-pack-year smoking history. He also has a history significant for alcohol abuse, but he quit cold turkey 15 years ago when his brother was killed in a drunk driving accident. Both he and his brother were adopted, and he does not know other members of his biological family. Despite repeated efforts of patient counseling, the patient is not interested in quitting smoking. The physical exam is significant for an obese male using accessory muscles of respiration. The vital signs include: temperature 36.8°C (98.2°F), heart rate 95/min, respiratory rate 16/min, and blood pressure 130/85 mm Hg. The oxygen saturation is 90% on room air. Additional physical exam findings include cyanotic lips, peripheral edema, hepatomegaly, and ascites. The cardiovascular exam is significant for an S3 heart sound and elevated JVP. The pulmonary exam is significant for expiratory wheezing, diffuse rhonchi, and hyperresonance on percussion. The laboratory test results are as follows: BUN 15 mg/dL pCO2 60 mm Hg Bicarbonate (HCO3) 32 mmol/L Creatinine 0.8 mg/dL Glucose 95 mg/dL Serum chloride 103 mmol/L Serum potassium 3.9 mEq/L Serum sodium 140 mEq/L Total calcium 2.3 mmol/L Hemoglobin 26 g/dL Bilirubin total 0.9 mg/dL Bilirubin indirect 0.4 mg/dL Iron 100 Ferritin 70 TIBC 300 The posterior-anterior chest X-ray is shown in the image. Which of the following interventions is indicated for decreasing the mortality of this patient?

Both smoking cessation and oxygen administration

A 32-year-old man is brought into the emergency department by his friends. The patient was playing soccer when he suddenly became short of breath. The patient used his albuterol inhaler with minimal improvement in his symptoms. He is currently struggling to breathe. The patient has a past medical history of asthma and a 25 pack-year smoking history. His current medications include albuterol, fluticasone, and oral prednisone. His temperature is 99.5°F (37.5°C), blood pressure is 137/78 mmHg, pulse is 120/min, respirations are 27/min, and oxygen saturation is 88% on room air. On pulmonary exam, the patient exhibits no wheezing with bilateral minimal air movement. The patient’s laboratory values are ordered as seen below. Hemoglobin: 15 g/dL Hematocrit: 43% Leukocyte count: 5,500/mm^3 with normal differential Platelet count: 194,000/mm^3 Serum: Na+: 138 mEq/L Cl-: 102 mEq/L K+: 4.4 mEq/L HCO3-: 24 mEq/L BUN: 20 mg/dL Glucose: 120 mg/dL Creatinine: 1.0 mg/dL Ca2+: 10.2 mg/dL pH: 7.44 PaCO2: 10 mmHg PaO2: 60 mmHg AST: 12 U/L ALT: 10 U/L The patient is started on an albuterol nebulizer, magnesium sulfate, and tiotropium bromide. Repeat vitals reveal an oxygen saturation of 90% with a pulse of 115/min. Laboratory values are repeated as seen below. pH: 7.40 PaCO2: 44 mmHg PaO2: 64 mmHg Which of the following is the next best step in management of this patient?

Continue current management with close observation

A 40-year-old man comes to the physician because of a 2-year history of gradually worsening shortness of breath. He smoked half a pack of cigarettes daily for 10 years but stopped 8 years ago. His pulse is 72/min, blood pressure is 135/75 mm Hg, and respirations are 20/min. Examination shows an increased anteroposterior diameter of the chest. Diminished breath sounds are heard on auscultation of the chest. An x-ray of the chest shows widened intercostal spaces, a flattened diaphragm, and bilateral hyperlucency of the lung bases. This patient's condition puts him at greatest risk for which of the following conditions?

Antineutrophil cytoplasmic antibody-positive vasculitis

COPD management and exacerbations for USMLE Step 2 CK: High-Yield Internal Medicine Lessons

COPD Diagnosis - The GOLD Standard

Spirometry is the gold standard and required to establish a diagnosis.
Key Criterion: Post-bronchodilator $FEV_1/FVC < \textbf{0.70}$ confirms persistent, largely irreversible airflow limitation.
Clinical Suspicion: Based on symptoms (dyspnea, chronic cough, sputum) and risk factor exposure (e.g., >10 pack-year smoking history).

⭐ Consider Alpha-1 Antitrypsin Deficiency (AATD) screening in all patients with a confirmed COPD diagnosis, especially in those of European ancestry, under 45 years, or with a minimal smoking history.

Stable COPD - Puff, Puff, Plan

Cornerstone Non-pharmacologic Rx:
- Smoking Cessation: Single most effective intervention to slow progression.
- Vaccinations: Annual influenza, PPSV23 & PCV13.
- Pulmonary Rehabilitation: Indicated for symptomatic patients (Group B-D).
Pharmacotherapy: Stepwise Approach (GOLD Guidelines)

Medication Classes:

Class	Action	Examples
SABA	Rescue Relief	Albuterol
LAMA	Maintenance	Tiotropium
LABA	Maintenance	Salmeterol
ICS	Anti-inflammatory	Fluticasone

COPD Inhaler Devices and Medications

COPD Exacerbations - Acute Attack Action

Oxygen: Titrate to SpO₂ 88-92% to avoid worsening hypercapnia.
Bronchodilators: Nebulized short-acting beta-agonists (SABA) like Albuterol + short-acting muscarinic antagonists (SAMA) like Ipratropium.
Corticosteroids: Systemic glucocorticoids (e.g., Prednisone 40mg PO daily for 5 days) are crucial.
Antibiotics: If increased sputum purulence plus one other cardinal symptom (increased dyspnea or sputum volume).

⭐ Anthonisen Criteria for Antibiotics: Use antibiotics for moderate-to-severe exacerbations, especially if all 3 cardinal symptoms are present: increased dyspnea, increased sputum volume, and increased sputum purulence. The presence of purulence is the strongest single predictor for needing antibiotics.

High‑Yield Points - ⚡ Biggest Takeaways

FEV1/FVC < 0.7 is diagnostic for COPD; severity is graded by FEV1.

Smoking cessation is the single most effective intervention to slow disease progression.

Management escalates from SABA/SAMA to LAMA/LABA combinations, adding ICS for frequent exacerbators.

Acute exacerbations are treated with oxygen, bronchodilators, systemic glucocorticoids, and antibiotics.

Long-term oxygen therapy is indicated for chronic hypoxemia (SpO2 ≤ 88%).

Administer influenza and pneumococcal vaccines.

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COPD management and exacerbations