Clinical Presentation & Protocol
Patient Usually Complains Of
Patient presents with a subacute onset of progressive exertional dyspnea, non-productive cough, and low-grade fevers. History significant for immunocompromise (e.g., HIV/AIDS, chronic corticosteroid use, or immunosuppressive therapy). Symptoms persist over several weeks with increasing fatigue and chest tightness. Denies hemoptysis or pleuritic chest pain.
Clinical Examination Findings
Vitals: Tachypnea and resting hypoxemia (SpO2 <92% on room air), often worsening with exertion. Pulmonary: Auscultation reveals clear lungs or faint bibasilar crackles; absence of consolidation signs. General: Patient appears chronically ill, cachectic, or in mild respiratory distress. Skin: Assess for signs of underlying systemic disease or opportunistic infections.
Treatment Protocol
Initiate empiric therapy with Trimethoprim-Sulfamethoxazole (TMP-SMX) 15-20 mg/kg/day (TMP component) IV/PO divided q6-8h. If PaO2 <70 mmHg or A-a gradient >35 mmHg, initiate adjunctive systemic corticosteroids (Prednisone 40mg BID for 5 days, then taper). Monitor for drug toxicity, renal function, and electrolyte disturbances (hyperkalemia).