A Randomized Controlled Trial Comparing Sutures vs Staples for High Tension Closures

1. Purpose, Background and Rationale A. Aim and Hypotheses
2. Standard of care for epidermal wound closure in dermatology is generally considered to be sutures, however many specialties utilize staples due to their increased speed of closure. In particular, high tension wound areas within dermatology may be more suitable for closure with staples given their higher tensile strength when compared to sutures.
3. The hypothesis is that for high tension areas:
4. Staples will provide improved cosmetic outcomes compared with sutures along with a reduction in closure times.
5. Patient comfort during the placement of staples, as well as the healing and removal process, will be no different than what patients with sutures experience.
6. Background and Significance
7. Study Significance: The intent of this research project is to help determine if sutures or staples are superior in high tension areas on the trunk and extremities in regards to cosmetic outcome and patient comfort, or if there are no differences between the two. This will help physicians when deciding between these two closure techniques. The idea for this project came as the investigators saw the majority of our attendings preferring sutures, but some preferring staples (citing greater tensile strength). One of the rationale the investigators have heard for preferring sutures is improved patient comfort, however anecdotally some patients that have had both sutures and staples have reported not different in comfort with closure and removal between the two.
8. Literature review: Similar studies have been done comparing sutures vs staples, especially for obstetrics and orthopedics. One study comparing subcutaneous sutres vs staples for emergency C-sections showed improved cosmetic outcomes, shorter duration of surgery, and comparable post op pain and complications.1
9. Rationale Anecdotal reports from patients report minimal to no difference with closure and removal of sutures vs staples and there is no current literature comparing the two. This study will help establish if there is a difference between these two closure techniques in patient comfort, and will also compare cosmetic outcomes.

II. Research Plan and Design

1. Study Objectives:

This randomized controlled trial will look at how different closure techniques impact closure appearance and patient comfort for placement and removal for two commonly used closure materials (ie suture or staples) in areas that are under high tension. Both of these closure techniques are already commonly used in clinical practice, but there are no studies comparing them to each other. This information can help guide dermatologic surgeons to pick the best method of closing a wound that is under tension.

1. Study Type and Design:

Randomized prospective clinical trial with 2 groups: 1 group with high tension area wounds closed with sutures (n=50) and 1 group with high tension area wounds closed with staples (n=50). Follow up periods will be 2 weeks for suture/staple removal and at 6 months for final cosmetic outcome.

1. Sample size, statistical methods, and power calculation 1. Randomization will be done with a random number generator the day of the surgery. Randomization ratio will be 1:1. T test, chi squared, and linear regression will be used to analyze the data.
2. One blinded physician will be used. Sutures or staples will be removed by a nurse and the patient will be asked not to inform the physician of the closure method at time of assessment. Code for the blinding will be held by the principle investigator. Circumstances/procedure for breaking the code will be in the event of a significant complication and can be done by looking back in the patient's chart or asking the patient which method was used.
3. Number of subjects to be enrolled has been determined based on other similar studies assessing scar appearance and by online calculators developed to determine number of subjects needed for a power of 80-90%. This sample size should allow us to detect if there are statistically significant differences in patient comfort and scar appearance.

• Subject Criteria (See Vulnerable Populations appendix, if applicable):

1. Inclusion criteria 18 and over Any race or gender Willing to return to KU for follow up clinic visits on at least 2 occasions (2 week for suture or staple removal and 6 month for scar assessment (can be done at 6 month follow up for full body skin exam- both would be standard of care)). Lesion location on high tension area as defined by: back, shoulder, scapula, elbow, scalp Incisions between the lengths of 3cm to 12 cm Skin pathology as defined by BCC, SCC, Melanoma
2. Exclusion criteria:

History of keloid or excessive scar formation (potential impact on cosmetic outcome) Contraindication to lidocaine with epinephrine (potential impact to comfort during procedure) Contraindication or skin sensitivity to suture or staple material (potential impact to comfort and cosmetic outcome)

1. Withdrawal/Termination criteria: NA
2. Participants may participate in another research study while participating in this one.
3. Specific methods and techniques used throughout the study
4. Laboratory tests: None
5. Study Procedures: Procedure done in the study include excision of skin cancer according to standards of care with a standard excision kit followed by a standard of care repair of the wound using either sutures vs staples. See attached for 3 patient surveys (time <5 minutes per survey) and for physician scar assessment (<5 minutes for assessment).
6. Surveys/Questionnaires and assessment of scar are performed for research purposes, the rest is standard of care
7. NA
8. Timeline: Day 1- informed consent, patient randomized into a closure group, excision and repair of skin cancer performed, patient fills out a questionnaire. Day 2- two weeks after excision: questionnaire on healing period, suture or staple removal, scar assessment, patient questionnaire about comfort with removal of sutures or staples. Day 3- 6 month follow up: assessment of scar before or after patients appointment for a full body skin exam (See attached)
9. Risk/benefit assessment:
10. Physical risk: Potential risk for discomfort or worsened cosmetic outcome in one arm of the study (both methods are considered within standard of care currently)
11. Psychological risk: None
12. Social risk: Appearance of scar (both methods are considered within standard of care currently)
13. Economic risk: None
14. Potential benefit of participating in the study
15. Individual - this study could help establish a superior method of closure that could be used if they need an excision in a high tension area in the future
16. Population - none
17. To science- this study could help determine if one of these methods of closure is superior to the other in terms of cosmetic outcome and patient discomfort G. Location where study will be performed: University of Kansas Medical Office Building