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Function Endoscopic Sinus Surgery

What is functional endoscopic sinus surgery?

Functional endoscopic sinus surgery (FESS) is minimally invasive surgery for serious sinus conditions. Healthcare providers use nasal endoscopes — thin tubes with lights and lenses — to ease your sinus symptoms without making incisions in or around your nose.

Why do people call it functional endoscopic sinus surgery?

Functional endoscopic sinus surgery is also called endoscopic sinus surgery. Some healthcare providers use the term “functional” because the surgery is done to restore how your sinuses work, or function.

When would I need functional endoscopic sinus surgery?

Your healthcare provider may recommend FESS if you have chronic sinus inflammation or a chronic sinus infection that doesn’t improve with medical treatments, such as antibiotics and medications to manage allergies.

You develop sinusitis when the tissue that lines your sinuses begins to swell, trapping mucus that typically flows through your sinuses and out through your nose. The trapped fluid can grow bacteria that can cause infections. Healthcare providers may also recommend surgery if you have nasal polyps.

How does my healthcare provider decide if I need functional endoscopic sinus surgery?

Your healthcare provider will review your medical history and do a physical examination. Tests they may use include:

  • Nasal endoscopy. Your healthcare provider checks your nasal passages and your sinuses through an endoscope for signs of infection or inflammation.
  • Computed tomography (CT) scan. This test helps your healthcare provider determine which parts of your sinuses are affected.


What happens before this procedure?

Your healthcare provider will let you know what to do before your surgery. Every person’s situation is different, but most healthcare providers recommend the following:

  • If you smoke, stop smoking at least three weeks before your surgery. Smoking can make your sinus symptoms worse. Ask your healthcare provider for advice or resources to help with this.
  • Don’t take aspirin for at least 10 days before your surgery. Even small amounts of aspirin can increase how much you bleed during and after your surgery.
  • If your surgery involves general anesthesia, don’t eat or drink anything after midnight the day of your surgery.
  • Your healthcare provider will administer general anesthesia just before your surgery begins.

How is functional endoscopic surgery performed?

FESS is the standard procedure to treat serious sinus conditions. Healthcare providers continue to refine their approach. Here’s an overview of the process:

  • Your healthcare provider puts decongestant medication in your nose.
  • They do a follow-up nasal endoscopy.
  • They inject a numbing solution into your nose.
  • Using the endoscope, they gently enter your nose. They insert surgical tools alongside the endoscope to use the endoscope to remove bone, diseased tissue or polyps that may be blocking your sinuses.
  • They may also use a small rotating burr to scrape out tissue.
  • Finally, your healthcare provider may pack your nose with material to absorb any blood or discharge.

How long does functional endoscopic surgery take?

Everyone’s situation is different, but most functional endoscopic surgeries last about two hours.

What happens after functional endoscopic sinus surgery?

You’ll spend some time in a recovery room so your healthcare provider can monitor your condition. You won’t be able to drive after surgery, so you’ll need someone to take you home and stay with you that first night. Your healthcare provider will tell you what to expect after surgery. Here’s some general information:

  • Avoid blowing your nose for at least seven days. If you need to sneeze, keep your mouth open or sneeze into your sleeve or a tissue.
  • When you sneeze, you may blow out bloody discharge or mucus. This may go on for a few weeks while your sinuses heal.
  • Take a break from strenuous activity for the next 10 days.
  • Your healthcare provider may recommend you rinse your nose and sinuses with saline.