Parapneumonic Effusion Drainage Criteria

Proceed to image-guided intercostal drainage when diagnostic thoracentesis yields frankly purulent fluid or when pleural-fluid Gram stain or culture identifies organisms. These findings define infected pleural fluid that is not expected to resolve with antibiotics alone. WileyWileyThe management of pleural space infections - Chapman - 2004 - Respirology - Wiley Online Library

Drain a nonpurulent parapneumonic effusion when pleural-fluid pH is <7.20 in an appropriate infectious presentation. A pleural glucose <60 mg/dL and LDH >1,000 IU/L are corroborating markers of complicated infection, but pH is the preferred initial biochemical discriminator. Wiley+2WileyThe management of pleural space infections - Chapman - 2004 - Respirology - Wiley Online LibraryWolters KluwerDistinguishing complicated from uncomplicated... : Current Opinion in Pulmonary MedicinePubMedPleural fluid chemical analysis in parapneumonic effusions: a meta-analysis - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI Bookshelf

Do not rely on biochemical thresholds to defer drainage when imaging shows a large effusion or loculations, or when the patient has ongoing sepsis with a pleural collection. Radiographic size and loculation are guideline-recognized features of complicated parapneumonic effusion and are associated with poorer outcomes after tube thoracostomy. ScienceDirect+1ScienceDirectPredicting Factors for Outcome of Tube Thoracostomy in Complicated Parapneumonic Effusion or Empyema - ScienceDirectWolters KluwerDistinguishing complicated from uncomplicated... : Current Opinion in Pulmonary Medicine

Use thoracic ultrasonography before aspiration or drain placement to confirm fluid, estimate volume, distinguish free-flowing from loculated fluid, assess echogenicity, and select a safe drainage site. Ultrasound is particularly useful when chest radiography shows hemithorax opacification and can be performed at the bedside. BMJBMJBTS guidelines for the management of pleural infection in children

If fluid is not pus, collect pleural fluid for immediate pH measurement in an appropriate blood-gas syringe without air contamination and analyze it promptly on a point-of-care blood-gas analyzer. Delayed analysis or air exposure can make pH unreliable and can misclassify a patient near the drainage threshold. BMJ+1BMJOnline Appendix C2 BTS Guideline for Pleural Disease ... - ThoraxWileyRole of interventional pulmonology in the management of complicated parapneumonic pleural effusions and empyema - Breen - 2014 - Respirology - Wiley Online Library

Send Gram stain and culture with pH, glucose, and LDH. Culture sensitivity is limited: standard microbiologic practice identified plausible organisms in only 16% to 19% of pleural infections in reported cohorts, so a negative culture does not override purulence, low pH, loculation, or a deteriorating clinical course. WileyWileyRole of interventional pulmonology in the management of complicated parapneumonic pleural effusions and empyema - Breen - 2014 - Respirology - Wiley Online Library

Use thoracic ultrasound to map septations and locules and to guide thoracentesis or chest-drain insertion. Ultrasound identifies free versus loculated fluid and pleural thickening, but it does not reliably stage pleural infection; do not withhold drainage because ultrasound cannot distinguish fibrinopurulent from organizing disease. BMJBMJBTS guidelines for the management of pleural infection in children

Contrast-enhanced chest CT is most useful when initial aspiration fails, tube drainage is inadequate, medical management is failing, or an endobronchial obstruction, lung abscess, mediastinal process, or other parenchymal abnormality must be assessed. CT can delineate loculated fluid and pleural contrast enhancement may improve detection of complicated parapneumonic effusion. BMJ+1BMJBTS guidelines for the management of pleural infection in childrenBMJOnline Appendix C2 BTS Guideline for Pleural Disease ... - Thorax

A small-bore 10-14 F catheter is considered adequate for most complicated pleural infections in BTS guidance. If using a small-bore flexible catheter, flush with 20-30 mL saline every 6 hours to reduce obstruction risk. Wolters KluwerWolters KluwerManagement of parapneumonic effusion and empyema : The Journal of Association of Chest Physicians

After catheter placement, reassess drainage output, residual pleural collection on imaging, and clinical response. Persistent infected fluid due to loculations, septations, or viscous pus is a drainage failure pattern; approximately 30% of cases may be difficult to evacuate for these anatomic reasons. cdn clinicaltrialscdn clinicaltrials[PDF] Fibrinolytic Therapy versus Medical Thoracoscopy for Treatment of ...

When initial chest-tube drainage has ceased but an infected residual collection remains, consider combined intrapleural alteplase and DNase. The MIST-2 regimen was alteplase 10 mg plus DNase 5 mg, administered intrapleurally twice daily for 3 days, for 12 total instillations. Combination therapy improved drainage and has been used as rescue treatment after antibiotics and thoracostomy drainage fail to achieve adequate clearance. PubMed+2PubMedMedical thoracoscopy combined with intrapleural injection of urokinase for treatment of pleural infection-a multicenter, prospective, randomized controlled study: study protocol - PMCPubMedRethinking the Doses of Tissue Plasminogen Activator and Deoxyribonuclease Administrated Concurrently for Intrapleural Therapy for Complicated Pleural Effusion and EmpyemaATS JournalsIntrapleural Tissue Plasminogen Activator and Deoxyribonuclease for Pleural Infection. An Effective and Safe Alternative to Surgery

Do not substitute single-agent fibrinolytic therapy for the combination regimen on the basis of the available comparative evidence. Combination tPA/DNase has a recognized bleeding risk, including pleural hemorrhage and hemoptysis; weigh this risk before use and involve procedural teams early when a patient has a persistent collection or cannot tolerate intrapleural therapy. PubMedPubMedMedical thoracoscopy combined with intrapleural injection of urokinase for treatment of pleural infection-a multicenter, prospective, randomized controlled study: study protocol - PMC

Do not classify every pneumonia-associated effusion as requiring a drain. Most sterile simple parapneumonic effusions resolve with antibiotic treatment alone; the drainage decision depends on evidence of pleural infection, adverse pleural-fluid chemistry, large volume, loculation, or failure to improve. ScienceDirect+1ScienceDirectParapneumonic Effusion - an overview | ScienceDirect TopicsWolters KluwerDistinguishing complicated from uncomplicated... : Current Opinion in Pulmonary Medicine

Do not use a negative culture to label a patient uncomplicated, and do not use a single low glucose value without context. Pleural cultures are frequently negative, glucose is affected by diabetes-related hyperglycemia, and pH remains the more accurate independent initial predictor of complicated parapneumonic effusion. BMJ+3BMJOnline Appendix C2 BTS Guideline for Pleural Disease ... - ThoraxWileyRole of interventional pulmonology in the management of complicated parapneumonic pleural effusions and empyema - Breen - 2014 - Respirology - Wiley Online LibraryWolters KluwerDistinguishing complicated from uncomplicated... : Current Opinion in Pulmonary MedicinePubMedPleural fluid chemical analysis in parapneumonic effusions: a meta-analysis - Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews - NCBI Bookshelf

When pH is high but clinical concern remains substantial, re-evaluate sampling quality, ultrasound anatomy, and alternative explanations for the collection. Rare Proteus empyema can produce an elevated pH, while loculated fluid may require direct targeting of the relevant pocket for representative sampling and drainage planning. BMJ+1BMJBTS guidelines for the management of pleural infection in childrenWileyThe management of pleural space infections - Chapman - 2004 - Respirology - Wiley Online Library