Treatment for Inflamed Pleura (Pleuritis)

Initial Diagnostic Evaluation

Perform diagnostic thoracentesis within 24 hours if pleural infection is suspected to guide antibiotic selection and determine need for drainage 1, 2
Measure pleural fluid pH, glucose, and lactate dehydrogenase (LDH) as these parameters determine management intensity 3, 4
Obtain blood cultures in all patients with suspected parapneumonic effusion 1
Use ultrasound as the preferred initial imaging modality to confirm effusion and guide thoracentesis 1, 2

Start antibiotics immediately once pleural infection is identified 1
For community-acquired pleural infection, use cefuroxime 1.5g IV three times daily PLUS metronidazole 400mg orally three times daily as the preferred regimen 5
For hospital-acquired pleural infection, use piperacillin-tazobactam 4.5g IV four times daily 5, 1
Avoid aminoglycosides as they penetrate poorly into pleural space and are inactive in acidic pleural fluid 5, 1
Metronidazole is essential for anaerobic coverage in community-acquired infections, particularly with aspiration risk 5
Continue oral antibiotics at discharge for 1-4 weeks, longer if residual disease present 1

Initial drainage should use small-bore chest tubes (14F or smaller) 3, 4, 2
Insert chest tube at outset for enlarging effusions or those compromising respiratory function rather than repeated thoracentesis 1
Use ultrasound guidance for all drain placements 1
Do not use early VATS or thoracotomy as initial treatment over chest tube drainage 3, 4

Consider combination tissue plasminogen activator (TPA) plus DNase if chest tube drainage ceases but residual collection remains 3, 6, 7, 4, 2
Regimen: 10mg TPA twice daily PLUS 5mg DNase twice daily for 3 days 3, 6, 7, 4
Obtain patient consent due to bleeding risk 3, 6, 7, 4
Reduce TPA dose in patients on anticoagulation 3, 6, 7, 4

Consider surgical referral if no improvement after 5-7 days of appropriate antibiotics and drainage 1, 2
VATS is preferred over thoracotomy when surgery required, resulting in less postoperative pain, shorter hospital stays, and fewer complications 3, 6, 7, 4, 2
Ensure respiratory physician or thoracic surgeon involvement for all patients requiring chest tube drainage 1

Delayed chest tube drainage increases morbidity, hospital stay, and possibly mortality 1
Alternative diagnoses (rheumatoid effusion, malignancy/mesothelioma) can mimic parapneumonic effusion with low pH and loculations 3, 4
Up to 15% of nonspecific pleuritis cases subsequently develop pleural malignancy, requiring extended follow-up 1, 2

Assess fever, inflammatory markers, and symptoms regularly during treatment 1, 2
Perform follow-up imaging to ensure resolution and absence of loculations 1, 2
Document treatment response at 5-8 days after initiating drainage and antibiotics 2
Extended radiological monitoring is crucial for nonspecific pleuritis where malignancy suspected but initial biopsies negative 2