Evaluation of nasal symptoms in septoplasty patients using SNOT-22| ACTA Otorhinolaryngologica Italica

Abstract

The aim of our study is to evaluate the nasal symptoms of patients with indications for septoplasty using the SNOT-22 questionnaire and to investigate the effects of variables such as concha surgery, age, obstructive sleep apnoea (OSA), smoking and asthma on these symptoms. A total of 100 patients were included in the study. Pre-operative and at postoperative month 3, patients were administered the Sinus Nasal Conduct Test (SNOT- 22). Septoplasty operations were performed by two centres and two otolaryngologists and head and neck surgeons. The patients were divided into two groups according to the surgical procedure of the lower concha, concha shaver group and concha out fractures. The difference in total score between preop and postop was significant in both the shaver and outfracture groups with a difference in total score of 17.85 (46%). Improvement in symptoms of nasal obstruction was observed with a mean improvement of 0.81 points (2.79 points). In our study, there was no significant difference in preop and postop symptom scores in patients who had subcuneal shaved submucous resection with outfracture (p = 0.861). There was no significant difference between preop and postop total scores between asthma, smoking, OSA and non-asthmatics (p > 0.05). There was no correlation between scores and age in either group (p > 0.05). Before septoplasty, the most important symptom was nasal obstruction. Intervention at the inferior turbinate during surgery increases the benefits of septoplasty independently of the surgical technique. Factors such as asthma, OSA, smoking are significantly relevant to symptoms. In those with asthma and OSA, the scores were found to be high both before and after intervention

Introduction

Nasal septum deviation is present in 19-65% of the population ¹. Dommerby and Tos reported that nasal trauma in childhood causes more septum deviations than in a control group ². Surgical treatment is required when septum deviation causes symptoms of nasal obstruction. However, the efficacy of septoplasty remains controversial. Many questionnaire-based studies have subjectively evaluated the effects of septoplasty on quality of life and nasal symptoms.

The Nasal Obstruction Septoplasty Effectiveness scale (NOSE) ³, Sinonasal Outcome Test-20 (SNOT-20) ⁴, and Sinonasal Outcome Test-22 (SNOT-22) ^{5 6} are commonly used evaluation methods. Hytönen et al. reported a 55% improvement in the second postoperative year in patients undergoing septoplasty ⁷. Another study that evaluated 200 patients at 6 weeks postoperatively reported improvement in nasal obstruction in 74% of patients ⁸. However, there are also reports of long-term complaints ⁹. Lower concha surgery methods are frequently performed with septoplasty, which most frequently affect surgical outcome and improves the symptoms of nasal obstruction ¹⁰. In the literature, there is no single, optimal inferior turbinate surgical method ¹¹. However, radiofrequency coblation and microdebrider-assisted turbinoplasty are commonly used techniques ^{11 12}.

The multiplicity of variables affecting the success of nasal septal surgery may be the cause of differences in outcomes. To evaluate the nasal symptoms of our septoplasty patients, we examined the effects of surgeon, patient age, obstructive sleep apnoea (OSA), smoking and asthma on symptoms using pre- and post-operative SNOT-22 scores.

Materials and methods

This study enrolled 118 adults treated between February 2015 and May 2017. Septoplasty was performed on those with nasal obstruction and other nasal symptoms in whom septum deviation and uni/bilateral inferior concha hypertropy was detected by nasal endoscopy. Informed consent was obtained from patients before the operation. All operations were performed under general anaesthesia. During septoplasty, submucosal shaver excision was performed for those with advanced hypertrophy in the lower conchae, and outfracture was performed for those with moderate hypertrophy. Patients were divided in two groups. Patients who underwent nasal septal correction and submucous shaver excision formed the shaver group, patients with outfracture formed outfracture group. Patients with a history of rhinoplasty; patients with prior conchal surgery or endoscopic sinus surgery with septoplasty were excluded from the study. Postoperatively, 19 of the patients were hospitalised for 1 day; the others were discharged the same day. The operations were performed in two centres, by two otolaryngologists and head and neck surgeons. A silicone splint was used in all patients. In addition, 95 patients were treated with Merocel buffer: Merocel-soaked tampons were left in 12 patients for 3 days, while the others were removed after 48 hours. The silicone splints were frequently removed on day 7 ¹³.

The SNOT-22 questionnaire, which has been validated in Turkish, was completed 3-9 days preoperatively and at the 3-month follow-up visit. Patients were asked to score the 22 symptoms on the questionnaire with 0-5 points (0 no problem, 5 worst case) and to identify the five symptoms most important to them. Patients who did not attend the follow-up examination were sent the questionnaire by mail.

Descriptive statistics of patients were summarised as means ± standard deviation and number. Demographic characteristics were assessed using the independent t-test, chi-squared test, or Fisher’s test (Table I); there were no significant differences between the shaver and outfracture groups. Within groups, the significance of the change in responses to each question was assessed using the Stuart-Maxwell test; P values are given in Table II. The differences between the overall pre- and post-operative scores were assessed using paired t-tests and the difference between two values was assessed using independent t-tests (Table III). The differences between the pre- and post-operative averages according to gender, smokers versus non-smokers and groups with and without comorbidities were assessed using the same methods (Table IV). Statistical significance was set as p < 0.05. The analyses were performed using STATA/MP11. The study was approved by Adana Numune Education and Research Hospital Ethics Committee (Ethics Committee No: 90).

Results

The study initially enrolled 118 patients. Eight patients were removed from the study because they did not undergo subconchal surgery and 10 patients were lost to follow-up. Consequently, 100 (91%) patients (57 men, 43 women) included in the study completed the pre- and postoperative SNOT-22. Of the patients, 15 had asthma, 48 smoked cigarettes and 12 had OSA. In the preoperative polysomnographic evaluation of OSA patients, five were moderate OSA (AHI from 15 to 30) and seven were mild OSA (AHI from 5-15). Fifty-five outfractures were performed with the submucosal resection, while 45 patients had a septoplasty with a lower conchal shaver.

The shaver group comprised 45 patients (24 men, 21 women; mean age 35.6 ± 13.4 years), while the outfracture group comprised 55 patients (33 men, 22 women; mean age 35.7 ± 12.9 years). Each group included 24 cigarette smokers and six patients with OSA; there were eight patients with asthma in the shaver group and seven in the outfracture group (Table I). The pre- and postoperative SNOT-22 score difference was 17.85 (46%). A mean improvement in symptoms of nasal obstruction of 0.81 points was observed, and the greatest improvement was 2.79 points. Age, gender, smoking, asthma and OSA did not differ between the two groups (all p > 0.05). There was a significant difference (p < 0.001) between the pre- and postoperative responses to the sadness and frustration questions. There was no significant difference between the pre- and post-operative responses to questions about solid nasal discharge, ear fullness, dizziness, ear pain, face pain or sensation of pressure (p > 0.05) (Table II).

In the outfracture group, there were significant differences between the pre- and postoperative responses to all questions, except ear fullness, nervousness, restlessness and aspiration (Table II). There was no significant difference in the pre- and post-operative total scores between the two groups (p = 0.861). Additionally, the differences between pre- and post-operative scores did not differ significantly between groups (p = 0.723) (Table III, Fig. 1).

The difference in the pre- and postoperative total scores was not affected by gender, smoking, or OSA within and between groups (all p > 0.05). In addition, there was no significant correlation between the pre- and post-operative score difference and age in either group (p > 0.05) (Table IV). When all patients were evaluated, there was no significant difference in pre- and post-operative scores between asthmatic and non-asthmatic patients (p = 0.993 and p = 0.447, respectively). No significant difference was found between OSA and non-OSA patients in terms of difference in the total score (p = 0.143 and p = 0.466, respectively).

Discussion

Of the patients participating in the study, 100 (91%) completed both the pre- and post-operative questionnaires. This rate is higher than that in other studies (60-76%) ^{5 10}. The SNOT-22 was first used to evaluate chronic sinusitis ¹³, and has also been used in sepsis ^{5 6}. Two septoplasty studies have used the SNOT-22 questionnaire: Buckland et al. ⁶ evaluated 40 patients and Maija et al. ⁵ evaluated 126 patients at 6 months post-operatively. In our study, the mean preoperative SNOT-22 score was 38.2 (range 21-57), which was higher than SNOT-22 scores in studies of other patients with septal deviation ^{5 6}. This may be due to the severe deviation in our patients. The mean postoperative SNOT-22 score was 20.47 (range 14-28), which is consistent with other studies. In SNOT-22 studies conducted in patients with chronic sinusitis and nasal polyps, the mean symptom score decreased by an average of 12.6 and 17.7 points, respectively. The pre- and post-operative total symptom score difference was 4.1 (19%) and 17 (47%) in SNOT-22 studies performed in the patients with septoplasty ^{6 14}. In 40 patients with septal deviation, Buckland et al. ⁶ observed the greatest improvement in symptoms of nasal obstruction (mean 2 points), while the other symptoms showed a median improvement of 0.8 points. The difference in our study was 17.85 (46%). While symptoms improved by 0.81 points on average, and symptomatic improvement in nasal obstruction was 2.79 points.

The mean SNOT-22 score in a healthy population was 9.3 and the lowest significant pre-/post-operative total score difference in a patient population was 8.9 ^{5 14}. In our study, the pre-/post-operative total score difference in 15 patients (15%) was less than 8.9, perhaps because the septal deviation was more moderate in these patients. In our study, two symptoms in the outfracture group and five symptoms in the shaver group did not change significantly postoperatively. There was no significant change in atrophy in either group. This is consistent with other septoplasty studies. In our study, there were no significant differences in the pre- and post-operative symptom scores of patients who underwent shaved submucosal resection and outfracture (p = 0.861).

A study that applied radiofrequency ablation reported that the SNOT scores were lower than those in patients who did not undergo radiofrequency ablation ⁵. Another study reported that patients with concha hypertrophy who underwent septoplasty showed significantly improved postoperative nasal obstruction symptoms ¹¹. In conclusion, although there was improvement in the symptoms of patients who underwent septoplasty and lower concha surgery, there was no difference according to the surgical techniques used.

The symptoms of nasal obstruction are greater in asthmatics than in non-asthmatics ¹⁵. Nasal obstruction can also lead to worsening of asthma. In our study, 15 patients had asthma. As in another study using the SNOT-20 questionnaire ⁴, there was no significant difference in the pre- and post-operative symptom scores between asthmatic and non-asthmatic patients. However, asthmatics had more symptoms than non-asthmatics. Many studies have reported that young populations benefit more from septoplasty ¹⁶. However, there was no correlation between the changes in postoperative symptoms and age in our study. Additionally, our study included 12 (12%) patients with OSA. There was no significant difference in SNOT-22 scores between OSA and non-OSA patients after septoplasty. However, as in asthmatics, the symptom scores were higher in the OSA patients than in the non-OSA patients. After surgery, three OSA patients reported using continuous positive airway pressure (CPAP). This may be due to their relatively low preoperative apnea hypopnea index (AHI) and the reduced oropharyngeal obstruction of patients who discontinued CPAP use. However, since there were no data to evaluate this and no postoperative polysomnography data, we cannot comment on OSA patients. Although both groups showed improvement in our study, there are reports that the outcome of successful septoplasty worsens in the long term ⁹. Therefore, long-term follow-up is needed.

Conclusions

Before septoplasty, the most important symptom was nasal obstruction. Intervention involving the inferior turbinate during surgery increases the benefits of septoplasty independently of the surgical technique. Although factors such as asthma, OSA, smoking and age did not significantly affect symptom outcomes, pre- and postoperative scores were higher in those with asthma and OSA. Therefore, it is important to consider these diseases before septoplasty and inform patients accordingly.

Figures and tables

Fig. 1.Total score averages in both groups in pre-operative and post-operative period.

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