What is the recommended management for acute and chronic sinusitis?

Management of Acute and Chronic Sinusitis

For acute bacterial rhinosinusitis (ABRS), start with amoxicillin (with or without clavulanate) for 5-10 days if antibiotics are chosen, but watchful waiting without antibiotics is equally appropriate for all patients with uncomplicated disease regardless of severity. 1, 2

Acute Sinusitis Management

Diagnosis and Initial Assessment

Acute sinusitis is defined as symptoms lasting less than 4 weeks and must be distinguished from viral upper respiratory infections. 1 The diagnosis requires at least 3 symptoms: purulent nasal discharge with nasal obstruction and/or facial pain-pressure-fullness lasting 10 days to 4 weeks. 3

• Clinical diagnosis is primarily based on history and physical examination without routine imaging. 1
• Plain radiographs have significant false-positive and false-negative results and are generally not necessary. 1
• Imaging should only be considered if complications are suspected (facial swelling, visual changes, abnormal extraocular movements, proptosis, periorbital inflammation, or neurologic signs). 1

Treatment Algorithm for Uncomplicated ABRS

Step 1: Initial Management (Choose One)

• Watchful waiting without antibiotics is now recommended for all patients with uncomplicated ABRS, not just those with mild illness. 1, 2
• OR initiate antibiotic therapy with amoxicillin (with or without clavulanate) for 5-10 days. 1, 2

Step 2: Reassessment at 3-5 Days

• If symptoms are improving, continue treatment until patient is well for 7 days (typically 10-14 day total course). 1
• If no improvement after 3-5 days, switch to high-dose amoxicillin-clavulanate (90 mg/kg amoxicillin and 6.4 mg/kg clavulanate, not to exceed 2g every 12 hours) or cefuroxime axetil. 1

Step 3: Reassessment at 7 Days

• Reassess to confirm ABRS, exclude other causes, and detect complications if the patient worsens or fails to improve by 7 days after diagnosis. 1

Antibiotic Selection

First-line: Amoxicillin with or without clavulanate for 5-10 days. 1, 2

Second-line (for treatment failure or high resistance areas):

• High-dose amoxicillin-clavulanate 1
• Cefuroxime, cefpodoxime, cefprozil, or cefdinir 1
• Quinolones, macrolides, or ketolides 1

For penicillin allergy: Cephalosporins, macrolides, or quinolones. 1

For adults unable to take amoxicillin: Trimethoprim-sulfamethoxazole (though resistance is more common in children). 1

Adjunctive Therapies

Nasal corticosteroids may be helpful in both acute and chronic sinusitis. 1

Oral corticosteroids are reasonable as adjunctive therapy when patients:

• Fail initial treatment 1
• Demonstrate nasal polyposis 1
• Have marked mucosal edema 1

Supportive measures: Adequate rest, hydration, analgesics, warm facial packs, steamy showers, and sleeping with head elevated. 1

Management of Treatment Failure

After 21-28 days without improvement:

• Consider broader-spectrum antibiotics (high-dose amoxicillin-clavulanate, cefuroxime, or cefpodoxime) with or without anaerobic coverage (clindamycin or metronidazole). 1
• Obtain sinus CT scan if not already done. 1
• Evaluate for nasal polyps, noncompliance, or resistant pathogens. 1
• Consider consultation with allergist-immunologist or otolaryngologist. 1

Chronic Rhinosinusitis (CRS) Management

Diagnosis

CRS is defined as symptoms persisting 8 weeks or longer with objective documentation of sinonasal inflammation. 1

• Objective confirmation is required using anterior rhinoscopy, nasal endoscopy, or CT scan. 1
• CT scan should show abnormal findings; more than 50% of patients with strong clinical history may have normal CT. 1
• Coronal sinus CT with cuts through the ostiomeatal complex is the imaging study of choice. 1

Assessment of Modifying Conditions

Evaluate all CRS patients for chronic conditions that modify management: 1, 2

• Asthma 1, 2
• Cystic fibrosis 1, 2
• Immunocompromised state 1, 2
• Ciliary dyskinesia 1, 2
• Aspirin-exacerbated respiratory disease (AERD) 2

Confirm presence or absence of nasal polyps as this fundamentally changes management. 1

Medical Management

For CRS without nasal polyps:

• Intranasal corticosteroids (INCS) are suggested over no treatment. 1
• Saline irrigation is recommended. 1
• Do not use empiric antibiotics solely as a third-party requirement for surgery or imaging. 2

For CRS with nasal polyps (CRSwNP):

• Intranasal corticosteroids are suggested (conditional recommendation based on small-to-moderate treatment effect). 1
• Educate patients about biologic therapies when polyps are present. 2
• Consider trial of oral corticosteroids before surgical referral. 1

Chronic hyperplastic eosinophilic rhinosinusitis:

• This noninfectious form does not respond to antibiotics. 1
• Marked by preponderance of eosinophils with relative paucity of neutrophils. 1
• Systemic corticosteroids should be considered. 1

Evaluation for Underlying Causes

Allergic rhinitis assessment:

• Evaluate for IgE sensitization to inhalant allergens. 1
• Treatment includes environmental control, pharmacotherapy, and allergen immunotherapy in selected patients. 1

Immunodeficiency evaluation (refer to allergist-immunologist):

• Particularly indicated when CRS is associated with otitis media, bronchitis, bronchiectasis, or pneumonia. 1
• Measure quantitative serum IgG, IgA, and IgM levels. 1
• Assess specific antibody responses to tetanus toxoid or pneumococcal polysaccharide vaccine. 1

Surgical Considerations

Indications for otolaryngology referral:

• Significant nasal septal deviation compressing middle turbinate into ostiomeatal complex 1
• Obstructing nasal polyps after appropriate medical therapy including oral corticosteroids 1
• Recurrent or chronic symptoms with radiographic ostiomeatal obstruction despite aggressive medical management 1
• Suspected neoplasia, fungal disease, or granulomatous disease 1

Maximize medical treatment for underlying rhinitis before proceeding with surgery. 1

Contemporary surgical approach is functional endoscopic sinus surgery (FESS). 1

Most patients require continued individualized medical therapy, including allergy management, after surgery. 1

Recurrent Sinusitis

Defined as 3 or more episodes of acute sinusitis per year. 1

Comprehensive evaluation required for:

• Underlying inflammation 1
• Allergy 1
• Immunodeficiency 1
• Anatomic abnormalities 1

Critical Pitfalls to Avoid

• Do not routinely image uncomplicated acute sinusitis as plain films have poor accuracy. 1
• Do not use long-term antibiotics for chronic sinusitis as it is primarily an inflammatory, not infectious, disease. 4
• Do not diagnose CRS without objective documentation of sinonasal inflammation. 1
• Do not prescribe empiric antibiotics for CRS solely to satisfy third-party requirements for surgery or imaging. 2
• Always screen for complications including facial swelling, visual changes, proptosis, or neurologic signs requiring urgent evaluation. 1
• Evaluate for asthma in all sinusitis patients with cough as sinusitis can initiate or worsen bronchial hyperresponsiveness. 1