Nasal Splint and Endoscopic Nasal Septal Repair Surgery

1. Purpose To compare the success rate of septoplasty in correcting the nasal septal deviation (with regards to nasal obstruction and intranasal access) among patient who used Doyle splints and those who did not. The investigators will also determine if patient's quality of life in the postoperative period is affected by the use of Doyle splints or not.
2. Hypothesis Is there a significant difference in success rates of septoplasty in patients who used a Doyle nasal splint when compared with patients who did not use the Doyle nasal splint? Null hypothesis There is no significant difference in success rates of septoplasty in patients who used a Doyle nasal splint when compared with patients who did not use the Doyle nasal splint.
3. Justification Currently in most North American rhinology clinics, nasal splints are used after septoplasty (using the quilting technique) to improve stability of the nasal septum. The quilting technique in addition to reduction of other complications was developed to improve septal stability after septoplasty. No study has been conducted to examine the efficacy of using only the quilting method when compared to the current standard of care which adds extra cost to the surgery. This study aims to evaluate the efficacy of the quilting technique in improving stability of the nasal septum among patients using nasal splints and those not on nasal splints after septoplasty. A recent study (Objective usefulness of thin silastic septal splints after septal surgery; i Jung, M.D., Kim, M.D. et al Am J Rhinol Allergy 25, 182-185, 2011) has shown Insertion of a silastic septal splint after septal surgery should be accepted as a routine procedure. Our study is aiming to show that quilting suture in x-shaped fashion technique is as effective and safe as using them yet avoids the potential complication of discomfort/pain/toxic shock syndrome etc. The essence of this study is to show that using the quilting suture technique alone without splints is as good as when used with splints. No other study has been done to investigate this.
4. Objectives Primary Objective To compare the success rate of septoplasty in correcting the nasal septal deviation (with regards to nasal obstruction and intranasal access) among patient who used Doyle splints and those who did not. Secondary Objectives To determine if patient's quality of life in the postoperative period is affected by the use of Doyle splints or not.
5. Research Method This is a Single blind Randomized Control Trial. Procedure The study population will be consecutive patients diagnosed with nasal septal deviation and who are undergoing nasal septal surgery. It will be a single blind randomized control trial. Allocation concealment will be ensured by the use of sequentially numbered, opaque, sealed envelopes. An assessor blinded to which patient is using Doyle splints will assess the primary outcome. Consent will be obtained for this study prior to the surgery. Blinding The study will be single-blinded study. The patients will be randomized into 2 arms/groups. An assessor blinded to which patient got the Doyle splints will assess the primary outcome. There will be two possible scenarios resulting from randomization: All patients will undergo septoplasty using quilting technique.
6. The Doyle splint will be places in both nostrils of the patient after septoplasty. The doyle splints will be removed 6 days after surgery as per standard of care. No other procedures will be changed during the surgery.
7. No Doyle splints will be placed in the nostrils of the patient after septoplasty. All standart of care visits will remain the same. The PI will be the blinded assessor. The choice of which patient gets a Doyle splint will be randomized using the sealed envelope system mentioned above. The randomization will be balanced to ensure that both arms have patients with extensive surgeries as well as isolated NSRs
8. Statistical Analysis

Sample size calculations Due to lack of data on failure rates of septoplasty in our centre, an a priori sample size calculation was used to determine the number of participants required to adequately compare the use of nasal splints. Given that this clinical trial is designed to investigate equivalency between the use of nasal splints and the lack thereof, an equivalency sample size calculation was performed. An equivalency limit of 5% was considered clinically significant from consultation with our expert rhinologist. A previously conducted study estimating failure and revision rates have estimated that the failure rate was 8%16. If there is truly no difference between the use of splints or lack thereof, then 88 patients (44 patients per group) will be required to be 80% sure that the limits of a two-sided confidence interval will exclude a difference in means of more than 5%. Accounting for dropout rates of 10%, a total of 96 patients (48 patients per group) will be required for this study.

Statistical Comparisons The primary objective of this randomized controlled trial will be to compare the success rates of septoplasty in patents with and without use of nasal splints up to 90 days post-surgery. Count and absolute percentages of rates will be reported. The Chi-Squared test will be used to determine statistical significance between rates. Probability values less than 5% (α=0.05) will be considered significant. Corresponding odds ratios and 95% confidence intervals will be reported.

For the secondary outcome measures (e.g. VAS, NOSE), results will be summated and considered as continuous, numerical variables. Descriptive statistics using mean, median, standard deviation and inter-quartile ranges will be reported. The unpaired two sample student t-tests will be applied to investigate the difference between the means of the various outcome measures. Probability values less than 5% (α =0.05) will also be considered statistically significant.

Baseline demographics and clinical factors will be compared between each treatment group to determine whether randomization yielded comparable groups. Multivariable logistic and linear regression will be used to investigate the relationships in the primary and secondary outcomes.