Treatment of Septic Arthritis Complicated by Pericarditis

Immediate Management Priorities

Patients with septic arthritis complicated by pericarditis require aggressive management with urgent pericardial drainage, empiric intravenous antimicrobial therapy targeting the most likely pathogen, and joint drainage, as purulent pericarditis is fatal if untreated and carries 40% mortality even with treatment 1
Perform urgent pericardiocentesis for both diagnosis and treatment, as suspicion of purulent pericarditis mandates immediate drainage 1
The pericardial fluid will typically show frankly purulent appearance with low pericardial:serum glucose ratio and elevated white cell count 1
Send pericardial fluid for bacterial, fungal, and tuberculous cultures immediately 1
Draw blood cultures before initiating antibiotics 1

Subxiphoid pericardiostomy with pericardial cavity irrigation should be strongly considered over simple pericardiocentesis alone 1
This approach allows manual lysis of loculations and more complete drainage 1
Purulent effusions are heavily loculated and rapidly re-accumulate, making adequate drainage crucial 1
Intrapericardial thrombolysis may be attempted for loculated effusions before resorting to surgery 1

Do not delay drainage while waiting for culture results - both pericardial and joint drainage are therapeutic as well as diagnostic 1
Do not rely on fever or constitutional symptoms alone - these are poorly sensitive for septic arthritis and may be absent in up to 30% of pericarditis cases 1
Do not use simple pericardiocentesis alone - loculated purulent effusions require more aggressive drainage strategies 1

Patients with immunosuppressive medication use or HIV infection are at higher risk for septic arthritis complicated by pericarditis 1

Adjunctive steroids should be avoided in HIV-associated TB pericarditis due to increased risk of HIV-associated malignancies 2