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Collapse of nasal valve — Clinical Guidelines

Overview

Nasal valve collapse, characterized by the structural weakening or dysfunction of the internal (INV) and external (ENV) nasal valves, significantly impairs nasal airflow and quality of life. It affects up to one-third of the US population, with severe cases often attributed to valve collapse, particularly impacting inspiratory airflow due to the Bernoulli principle. This condition is particularly prevalent among patients with prior nasal surgeries, congenital anomalies, or trauma. Recognizing and managing nasal valve collapse is crucial in otolaryngology practice to alleviate symptoms of nasal obstruction and improve patient well-being 1 3 5.

Pathophysiology

The pathophysiology of nasal valve collapse involves structural and functional impairments primarily affecting the INV and ENV. The INV, defined by the dorsal nasal septum, upper lateral cartilage, and inferior turbinate, narrows due to factors such as weakened cartilage, anatomical deformities, or surgical alterations. This narrowing increases resistance to airflow, leading to collapse during inspiration. Similarly, the ENV, bordered by the alar rim, nasal sill, caudal septum, and lower lateral cartilages, can collapse due to insufficient support from the lower lateral cartilages. These collapses disrupt normal airflow dynamics, causing significant nasal obstruction 1 3 5.

Epidemiology

Nasal valve collapse is a common issue, affecting up to one-third of the population seeking otolaryngological care for nasal obstruction. Severe cases are more frequently observed in patients who have undergone previous nasal surgeries, suggesting a notable risk factor related to iatrogenic causes. Age and prior trauma also contribute to increased prevalence, though specific incidence and prevalence figures vary widely across studies. Geographic and ethnic distributions show no significant disparities, but trends indicate a rising incidence due to increased awareness and diagnostic capabilities 1 3.

Clinical Presentation

Patients with nasal valve collapse typically present with symptoms of nasal obstruction, particularly during inspiration, leading to difficulty breathing through the nose. Common complaints include nasal congestion, reduced sense of smell, and sleep disturbances such as snoring or sleep apnea. Atypical presentations may include facial pain or pressure, especially if secondary complications like sinusitis arise. Red-flag features include unilateral symptoms suggesting trauma or previous surgical complications, which warrant thorough evaluation 1 3 5.

Diagnosis

The diagnosis of nasal valve collapse involves a comprehensive clinical evaluation complemented by specific diagnostic maneuvers and imaging techniques. Key steps include:

Physical Examination: Detailed inspection and palpation of the nasal anatomy, focusing on the INV and ENV.

Cottle Maneuver: Although its validity is debated, a positive maneuver can suggest valve collapse 8.

Acoustic Rhinometry: Measures nasal airway dimensions, identifying areas of narrowing indicative of valve collapse 3.

Video Endoscopy: Evaluates dynamic changes during respiration, highlighting inspiratory collapse 3.

Criteria for Diagnosis:

- Positive Cottle maneuver (when used) - Acoustic rhinometry showing <0.7 cm2 at the INV - Video endoscopy demonstrating >50% reduction in airway diameter during inspiration - Symptom correlation with inspiratory obstruction

Differential Diagnosis:

Deviated Nasal Septum: Distinguished by unilateral obstruction without inspiratory collapse.

Hypertrophic Inferior Turbinates: Presents with bilateral obstruction, often relieved by decongestants.

Allergic Rhinitis: Characterized by sneezing, itching, and clear rhinorrhea alongside obstruction 1 3 5.

Management

Initial Management

Non-Surgical Approaches:

Nasal Dilators: Over-the-counter devices to temporarily alleviate symptoms.

Saline Irrigation: Regular nasal irrigation to reduce mucosal swelling.

Topical Nasal Steroids: To reduce inflammation and improve airflow (e.g., fluticasone, mometasone; daily use for several weeks) 1 3.

Surgical Interventions

Primary Surgical Options:

Lateral Crural Strut Graft (LCSG): Addresses ENV collapse by reinforcing the lower lateral cartilages.

- Procedure: Placement of a cartilage graft along the lateral crura. - Monitoring: Postoperative nasal endoscopy at 1 week, 1 month, and 3 months.

Alar Batten Graft (ABG): Corrects both INV and ENV collapse by providing structural support.

- Procedure: Curvilinear cartilage graft placed over the alar cartilage. - Monitoring: Similar to LCSG, with emphasis on functional outcomes via acoustic rhinometry.

Advanced Techniques:

Spreader Grafts: Used to widen the INV angle, preventing collapse.

- Procedure: Placement of cartilage grafts between the upper lateral cartilage and septum. - Monitoring: Regular follow-up with acoustic rhinometry and endoscopy.

Alar Suspension Sutures: Provide additional support to the alar cartilage.

- Procedure: Sutures hitched from the vestibular skin to the periosteum. - Monitoring: Postoperative assessment at 1 week, 1 month, and 6 months.

Contraindications:

Active infections

Severe systemic diseases affecting wound healing

Complications

Common Complications:

Nasal Septal Deviation: Post-surgical misalignment requiring revision surgery.

Scarring and Deformity: Altered nasal contour or persistent obstruction.

Infection: Risk mitigated by prophylactic antibiotics and vigilant monitoring.

Management Triggers:

Persistent symptoms post-surgery warrant re-evaluation.

Signs of infection (redness, purulent discharge) require immediate intervention.

Referral to a specialist if complications are severe or recurrent 1 3 5.

Prognosis & Follow-up

The prognosis for nasal valve collapse is generally favorable with appropriate surgical intervention, often leading to significant symptom relief and improved quality of life. Prognostic indicators include the severity of preoperative obstruction and the success of initial surgical techniques. Recommended follow-up intervals include:

Initial Postoperative: 1 week for wound inspection.

Short-Term: 1 month for functional assessment via acoustic rhinometry.

Long-Term: 6-12 months to ensure sustained improvement and address any late complications 3 14.

Special Populations

Pediatric Patients

Considerations: Growth dynamics necessitate conservative approaches initially, with surgical interventions reserved for severe cases.

Management: Often starts with conservative measures; surgical options like LCSG or ABG are considered if conservative treatments fail 24.

Post-Surgical Patients

Considerations: Prior surgeries increase risk of iatrogenic complications; careful preoperative assessment is crucial.

Management: Tailored surgical techniques like spreader grafts or alar batten grafts to address specific weaknesses identified 1 3 44.

Elderly Patients

Considerations: Reduced healing capacity and comorbid conditions affect surgical outcomes.

Management: Conservative treatments preferred initially; surgical interventions require meticulous planning and close monitoring 1 3.

Key Recommendations

Diagnose Nasal Valve Collapse Using Combined Clinical and Objective Measures: Include Cottle maneuver, acoustic rhinometry, and video endoscopy (Evidence: Moderate) 1 3 8.

Initiate with Non-Surgical Management for Mild Cases: Utilize nasal dilators and topical nasal steroids (Evidence: Moderate) 1 3.

Consider Surgical Interventions for Moderate to Severe Cases: Prioritize LCSG or ABG based on valve involvement (Evidence: Strong) 1 3 6 13.

Monitor Postoperative Outcomes Regularly: Use acoustic rhinometry and endoscopy at 1 week, 1 month, and 3 months (Evidence: Moderate) 3 14.

Refer Complex or Recurrent Cases to Specialists: Expert consultation for advanced techniques or complications (Evidence: Expert opinion) 1 3.

Tailor Management for Special Populations: Adjust approaches for pediatric, post-surgical, and elderly patients (Evidence: Moderate) 24 1 3.

Evaluate for Differential Diagnoses: Rule out septal deviation and hypertrophic turbinates (Evidence: Moderate) 1 3.

Prevent Complications Through Prophylactic Measures: Use prophylactic antibiotics and vigilant monitoring (Evidence: Moderate) 1 3.

Ensure Long-Term Follow-Up: Monitor for sustained improvement and late complications (Evidence: Moderate) 3 14.

Consider Biochemical Variability in Cartilage: Account for cartilage strength in surgical planning (Evidence: Moderate) 6.

References

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Collapse of nasal valve