The effect of radiofrequency thermal ablation method on nasal mucociliary activity in patients with inferior turbinate hypertrophy

Radiofrequency Ablation for Inferior Turbinate Hypertrophy: Predictive Factors for Short and Long-Term Outcomes

OBJECTIVES

Radiofrequency Ablation (RFA) is a widely used technique for treatment of nasal obstruction due to inferior turbinate hypertrophy. This study aims to evaluate short and long-term outcome after RFA. Secondly, predictive factors for this outcome were evaluated.

METHODS

A prospective clinical study was performed in 65 patients to evaluate short-term outcome and predictive factors (Study A). To evaluate long-term outcome and predictive factors we performed a second clinical study in 124 patients (Study B). Patients scored nasal symptoms on a 1 to 5 points visual analogue scale (VAS) and filled in questionnaires about their comorbidity, previous nasal surgery, and medication use.

RESULTS

Study A: There was significant short-term (6-8 weeks after RFA) improvement in nasal obstruction (VAS -1.3, P < .001), trouble exercising (VAS -1.5, P < .001), trouble sleeping (VAS -0.9, P < .001), snoring (VAS -1.1, P< .001), and hyposmia (VAS -0.6, P = .004). Smoking (R² = .065, P = .047) was a predictor for less optimized and previous use of decongestive nasal spray (R² = .135, P = .005) for better short-term outcome. Study B: Nasal obstruction significantly decreased in the long term (1-5 years after RFA) compared to VAS before RFA (VAS -1.5, P < .001), but slightly increased compared to VAS 6 to 8 weeks after RFA (VAS +0.3, P = .036). Allergy (R² = .066, P = .006), asthma (R² = .068, P = .005), and previous use of corticosteroid nasal spray (R² = .050, P = .016) were associated with a less optimized and older age (R² = .217, P < .001) with better long-term outcome.

CONCLUSION

RFA is an efficient treatment for nasal obstruction, and improves sleeping, exercising, snoring, and hyposmia. Predictors for good short-term outcome were previous use of decongestive nasal spray and no smoking. Predictors for a less optimized long-term outcome were allergy, asthma, and previous use of corticosteroid nasal spray. Older age was associated with better long-term outcome.

Effect of Radiofrequency Thermal Ablation Treatment on Nasal Ciliary Motility: A Study with Phase-Contrast Microscopy

OBJECTIVE

To investigate the efficacy of nasal ciliary motility after radiofrequency ablation treatment in patients with isolated inferior turbinate hypertrophy and to clarify how long until normal ciliary function is restored.

STUDY DESIGN

Prospective, single-group, pretest-posttest design.

SETTING

Academic tertiary care medical center.

SUBJECTS AND METHODS

This study involved 34 adult patients affected by nasal obstruction due to inferior turbinate hypertrophy who underwent radiofrequency ablation treatment between June and December 2014. Diagnosis was assessed according to clinical history, nasal endoscopy, and active anterior rhinomanometry. Cytologic samples were collected by nasal scraping before surgery and 1, 2, and 3 months after surgery. Ciliary motility was evaluated by nasal cytology with phase-contrast microscopy. Functional aspects of nasal mucosa were studied, with a focus on 3 parameters: (1) nasal mucociliary clearance, assessed by saccharin nasal transit time test; (2) percentage of ciliated cell motility, measured as the ratio between cells with motility and cells without motility; and (3) efficacy of ciliary motility, measured as the ratio between cells with valid motility and cells with hypovalid motility.

RESULTS

Ciliary motility and ciliary efficacy showed a significant reduction after 1 and 2 months from surgery, returning to normal values within 3 months. No significant changes in saccharin nasal transit time were recorded during the follow-up.

CONCLUSIONS

The outcomes of this study suggest that radiofrequency ablation treatment causes ciliary motility changes of nasal mucosa that are completely restored after at least 3 months after surgery. These cytologic abnormalities do not affect nasal functionality.

Radiofrequency Thermal Ablation versus Bipolar Electrocautery for the Treatment of Inferior Turbinate Hypertrophy: Comparison of Efficacy and Postoperative Morbidity

Introduction Numerous surgical methods are used to treat nasal obstruction due to inferior turbinate hypertrophy. The primary goal of the therapy is to maximize the nasal airway for as extended a period of time as possible while minimizing therapeutic complications. Objectives The aim of this study was to assess the effects of radiofrequency thermal ablation (RFTA) and bipolar electrocautery (BEC) on the removal of nasal obstruction in patients with inferior turbinate hypertrophy and on nasal mucociliary clearance (MCC). Patients in both groups were also evaluated in terms of postoperative morbidity. Methods We compared the outcomes of two groups of patients: those treated with RFTA (n = 23) and those who underwent BEC (n = 20). Nasal obstruction was graded using a visual analog scale (VAS) and MCC was measured using a saccharin clearance test. Both measurements were performed before and 2 months after treatment. Results Pre- and postoperative VAS scores showed significant improvement for both groups. However, MCC results did not significantly differ between two groups. Neither edema nor crust formation persisted for more than 1 week in any patients. Conclusion Submucosal cauterization with preservation of the nasal mucosa and periosteum is as effective and safe as RFTA and should be considered when planning inferior turbinate interventions.