Recurrent fever and right pleural effusion on hospital day 3
A 54-year-old middle-school science teacher is on hospital day 3 of inpatient treatment for an acute right lower lobe bacterial pulmonary infection. His past medical history includes hypertension and mild gout managed with allopurinol. Initial therapy consisted of intravenous ceftriaxone and oral azithromycin. After early clinical improvement, he develops recurrent fever, dyspnea, and right-sided pleuritic chest pain. Temperature is 38.6 C (101.5 F), blood pressure is 126/74 mm Hg, pulse is 94/min, and respirations are 22/min. Physical examination reveals dullness to percussion and diminished breath sounds over the right lower hemithorax. Leukocyte count is 14,600/uL with 12% bands. Chest radiography reveals a moderate right pleural effusion, and bedside ultrasound confirms free-flowing fluid without complex septations. Thoracentesis yields cloudy fluid with a pH of 7.12, glucose of 36 mg/dL (concurrent serum glucose 108 mg/dL), and lactate dehydrogenase of 1,640 U/L (serum reference upper limit 200 U/L). Gram stain demonstrates no organisms. Which of the following is the most appropriate next step in management?
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E
Explanation
Clinical Pearl:
A complicated pleural effusion is defined by fluid acidosis with a pH below 7.20, low glucose below 60 mg/dL, or markedly elevated lactate dehydrogenase, requiring prompt tube thoracostomy drainage to prevent loculation and pleural thickening.
Explanation:
The patient has a complicated pleural effusion complicating a bacterial lung infection, established by recurrent fever, pleural fluid acidosis (pH 7.12), low pleural fluid glucose (36 mg/dL), and marked elevation of pleural fluid lactate dehydrogenase (1,640 U/L). Current professional thoracic society guidance dictates prompt tube thoracostomy drainage for any infected or complicated pleural fluid collection meeting these biochemical criteria, even when Gram stain and culture are negative, because antimicrobial therapy alone cannot sterilize or resolve the acidic collection. Escalation to intravenous vancomycin and piperacillin-tazobactam provides broader systemic coverage but fails to provide essential source control of the closed pleural space. Repeat therapeutic thoracentesis in 48 hours is inadequate and associated with high recurrence and complication rates compared with continuous tube drainage. Video-assisted thoracoscopic decortication of the pleura is an advanced surgical intervention indicated when initial tube thoracostomy and medical therapy fail to achieve adequate lung re-expansion or clinical resolution, making it premature as an initial measure. Flexible bronchoscopy with bronchoalveolar lavage evaluates airway lesions or parenchymal pathology but does not evacuate the pleural fluid collection responsible for this clinical decline.
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