What is the role of lab testing in the workup of periorbital infections?

Updated: Jul 31, 2018
  • Author: Bobak Zonnoor , MD; Chief Editor: Gil Z Shlamovitz, MD, FACEP  more...
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The following laboratory studies may be performed in patients with periorbital infection:

  • Periorbital cellulitis - Diagnosis is based primarily on clinical findings. Laboratory or radiologic workup is not required. Thus, a complete blood cell (CBC) count with differential is not routinely necessary, but it may be helpful if bacteremia or sepsis is a concern; blood cultures may also be performed if bacteremia or sepsis is a concern; skin culture has a very low yield. Wound culture of a purulent drainage site may be helpful if a resistant or unusual pathogen is suspected. [43]

  • Dacryoadenitis - A CBC count with differential and blood culture may be performed if bacteremia or sepsis is a concern; serology testing may be indicated if a viral etiology needs to be established.

  • Canaliculitis and dacryocystitis - Culture of expressed material may help to guide therapy

  • Blepharitis - No laboratory studies are indicated routinely

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