Pulm Vignettes

1. A 68-year-old man with a history of chronic ob- structive pulmonary disease (COPD) presents to the emergency department with increasing shortness of breath, lethargy, and confusion. On examination, he appears drowsy, with labored breathing and use of ac- cessory muscles. His oxygen saturation is 88% on room air, and arterial blood gas (ABG) analysis reveals a pH of 7.28, PaCO2 of 60 mmHg, and HCO3- of 30 mEq/L. What is the likely underlying acid-base disturbance, and what could be the precipitating factor? 2. A 25-year-old female presents to the clinic after ex- periencing dizziness, lightheadedness, and tingling in her fingers. She reports that these symptoms began after a stressful argument and have been associat- ed with rapid breathing. Her physical examination is unremarkable. Arterial blood gas (ABG) results show a pH of 7.48, PaCO2 of 28 mmHg, and HCO3- of 24 mEq/L. What acid-base disturbance does this patient have, and what is the most likely cause? 3. A 55-year-old male with a history of diabetes mellitus is brought to the emergency department with nausea, vomiting, and deep, rapid breathing for the past two days. His blood glucose is 450 mg/dL, and a ketone test is positive. Arterial blood gas (ABG) analysis reveals a pH of 7.25, PaCO2 of 25 mmHg, and HCO3- of 15 mEq/L. An anion gap is calculated and found to be elevated. What is the acid-base disturbance present, and what is the underlying condition? Resp Acidosis Resp Alkylosis Metabolic Acidosis 4. Metabolic Alkyalosis A 45-year-old woman presents to the emergency de- partment with severe weakness, muscle cramps, and confusion. She reports a history of persistent vomiting over the past week due to a gastrointestinal illness. On examination, her blood pressure is 90/60 mmHg, and she appears dehydrated. Arterial blood gas (ABG) analysis reveals a pH of 7.50, PaCO2 of 47 mmHg, and HCO3- of 35 mEq/L. What is the likely acid-base distur- bance, and what could be the contributing factor? 5. A 70-year-old man with a history of congestive heart failure presents with progressively worsening short- ness of breath and swelling in his legs. Physical exam- ination reveals decreased breath sounds at the lung bases and pitting edema in the lower extremities. A chest X-ray shows a large right-sided pleural effu- sion. Thoracentesis is performed, and the pleural fluid analysis reveals low protein content and low lactate dehydrogenase (LDH). What is the likely type of pleural effusion, and what is the underlying cause? 6. A 65-year-old female with a history of rheumatoid arthritis presents with a two-week history of pleuritic chest pain, cough, and shortness of breath. Physical examination reveals decreased breath sounds on the left side. A chest X-ray shows a left-sided pleural effu- sion. Thoracentesis reveals pleural fluid with high pro- tein content, elevated lactate dehydrogenase (LDH), and a positive rheumatoid factor. What type of pleural effusion is this, and what is the likely underlying con- dition? Transudative Pleural Ettu- sion Exudative Pleural Ettusion 7. A 30-year-old male presents to the emergency depart- Hemothorax ment after a motor vehicle accident. He complains of severe chest pain and difficulty breathing. On exami- nation, there is decreased breath sounds and dullness to percussion on the left side. A chest X-ray reveals a large pleural effusion. Thoracentesis is performed, and the fluid appears bloody. What is the diagnosis, and what is the appropriate next step in management? 8. A 23-year-old male presents with sudden onset of sharp, right-sided chest pain and shortness of breath while playing basketball. On physical examination, breath sounds are diminished on the right side, and there is hyperresonance to percussion. A chest X-ray confirms a right-sided pleural line with no lung mark- ings peripheral to it. What is the most likely diagnosis, and how should this condition be managed? Pneumothorax 9. A 52-year-old male with a body mass index (BMI) of 35 Obstructive sleep apnea presents with complaints of excessive daytime sleepi- ness, loud snoring, and his wife reports that she has noticed episodes where he seems to stop breathing during sleep. Physical examination reveals a crowded oropharynx. What is the most likely diagnosis, and what is the recommended treatment? 10. A 67-year-old male with a history of congestive heart failure presents with excessive daytime sleepiness and a feeling of breathlessness that wakes him up during the night. He denies loud snoring but reports waking up multiple times gasping for air. A sleep study reveals a pattern of Cheyne-Stokes respiration with repeated Central sleep apnea episodes of apnea and hypopnea. What is the most likely diagnosis, and what is the appropriate manage- ment? 11. A 60-year-old female with a body mass index (BMI) of 45 presents with complaints of morning headaches, fatigue, and excessive daytime sleepiness. Her family reports that she snores loudly at night and occasion- ally gasps for air. Arterial blood gas (ABG) analysis re- veals a pH of 7.35, PaCO2 of 55 mmHg, and HCO3- of 30 mEq/L. What is the most likely diagnosis, and what initial steps should be taken to manage this condition? Obesity Hypoventilation Syndrome 12. A 30-year-old female presents with recurrent episodes Asthma of wheezing, shortness of breath, and chest tightness, particularly at night and with exercise. She reports using her rescue inhaler multiple times a day over the past week. Physical examination reveals diffuse wheezing on auscultation. Pulmonary function tests show reversible airway obstruction with a significant improvement in FEV1 after bronchodilator administra- tion. What is the most likely diagnosis, and what is the appropriate management? 13. A 65-year-old male with a 40-pack-year smoking his- tory presents with a chronic productive cough that has persisted for the past three years. He also reports dyspnea on exertion and frequent respiratory infec- tions. On examination, he has a prolonged expiratory phase with scattered wheezes and rhonchi. Pulmonary function tests show an FEV1/FVC ratio of 65%. What is Chonic Bronchitis the likely diagnosis, and what are the recommended treatment options? 14. A 70-year-old male with a history of smoking 1 pack per Emphysema day for 50 years presents with progressive shortness of breath and recent unintentional weight loss. He de- nies a chronic cough but reports increasing difficulty with physical activity. A chest X-ray reveals hyperinflat- ed lungs with a flattened diaphragm, and pulmonary function tests show a decreased FEV1/FVC ratio and increased total lung capacity. What is the most likely diagnosis, and what are the key elements of manage- ment? 15. A 25-year-old female presents with a history of chronic Cystic Fibrosis cough, recurrent respiratory infections, and difficulty gaining weight. She reports a thick, tenacious sputum production and increasing shortness of breath. Her sweat chloride test is positive, and genetic testing con- firms the presence of the delta F508 mutation. What is the diagnosis, and what are the mainstays of treat- ment for this condition? 16. A 60-year-old male presents with a gradual onset of dyspnea on exertion and a dry, non-productive cough that has worsened over the past year. He denies any history of smoking or occupational exposures. On ex- amination, fine bibasilar crackles are noted. A high-res- olution CT scan of the chest shows a pattern consistent with usual interstitial pneumonia (UIP), including hon- eycombing and reticular changes. What is the most Idiopathic Pulmonary Fi- brosis likely diagnosis, and what treatment options should be considered? 17. A 70-year-old retired shipyard worker presents with progressive shortness of breath and a dry cough. He reports working with asbestos-containing materials for over 30 years. A chest X-ray reveals pleural plaques and interstitial fibrosis predominantly in the lower lobes. Pulmonary function tests show a restrictive pat- tern. What is the diagnosis, and what complications should be monitored? 18. A 55-year-old male with a long history of working in coal mines presents with a chronic cough and short- ness of breath. On examination, there are no wheezes, but a few crackles are heard. A chest X-ray reveals small, rounded opacities primarily in the upper lung zones. Pulmonary function tests show a restrictive pat- tern. What is the diagnosis, and what is the signifi- cance of this condition in terms of progression? 19. A 58-year-old male who worked in the construction industry for over 30 years presents with progressive shortness of breath and a chronic cough. He reports that his symptoms have worsened over the past few months. A chest X-ray reveals multiple small nodu- lar opacities in the upper lung zones, and pulmonary function tests show a restrictive pattern. The patient also has a history of working with silica dust without proper respiratory protection. What is the most likely diagnosis, and what are the long-term risks associated with this condition?