Floraseal Versus Iodine Impregnated Adhesive Drapes


Infection after total joint arthroplasty can have devastating consequences. Adhesive drapes have been traditionally used at our institution to help reduce the risk of wound contamination and infection by superficial skin flora. Our primary objective is to determine if a cyanoacrylate-based sealant (FloraSeal microbial sealant) is superior to conventional iodine impregnated drapes in prevention of both superficial and deep surgical site infections in total joint arthroplasty (TJA) patients. A prospective, randomized controlled model will be used to answer this question.

Full Title of Study: “Prevention of Surgical Site Infections in Total Joint Arthroplasty: Iodine Impregnated Adhesive Drapes Versus Cyanoacrylate-Based Sealant”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Prevention
    • Masking: None (Open Label)
  • Study Primary Completion Date: November 1, 2019

Detailed Description

Demand for Total Knee Arthroplasty (TKA) and Total Hip Arthroplasty (THA) is increasing steadily and is projected to continue trending upwards in the coming years. Postoperative infections are a common but also potentially devastating complication of total joint arthroplasty. Various strategies are employed both pre-operatively and post-operatively to prevent this complication. A 2011 Cochrane Review concluded that Iodine impregnated adhesive drapes had no impact on surgical site infection rate when used in various surgical procedures not specific to orthopaedics. The recent SSI prevention guidelines by the World Health Organization did not find any evidence to support the use of adhesive drapes during surgery and recommends against its use. Currently, iodine impregnated adhesive drapes in conjunction with either chorahexadine gluconate or Iodine Povacrylex and Isopropyl Alcohol are the standard of care at our institution. FloraSeal is a cyanoacrylate-based sealant. A cyanoacrylate microbial sealant minimizes endogenous bacteria spread to the surgical site by forming a sterile film bonded onto a patient's skin. This film, which is formed upon polymerization, prevents the spread of microorganisms. The protective mechanism is mechanical: the film traps and immobilizes microorganisms that survive on a patient's skin. It has been previously shown to effectively immobilize both gram positive and gram negative bacteria. Additionally, the sealant itself can effectively reduce the superficial bacterial burden on the skin surface and also helps reduce skin moisture buildup on skin. Furthermore, with conventional adhesive drapes, the edges must be peeled back at the time of skin closure in order to effectively close the surgical site. It is at this moment that the incision becomes most vulnerable to penetration by local microorganisms. FloraSeal and other cyanoacrylate based sealants remain on the skin for 5 to 10 days until the superficial skin sloughs off. Studies on sterile pig skin demonstrated FloraSeal to be more effective alone at immobilizing bacteria than incisional drapes. The efficacy was the same when FloraSeal was used with or without the incisional drapes, demonstrating that it may be used as a substitute. Additionally, a 2013 retrospective study in revision shoulder arthroplasty demonstrated a potential reduction in positive intraoperative deep tissue cultures when using a cyanoacrylate-based microbial sealant versus the iodine impregnated incisional drapes. The study lacked sufficient power to reach significance, calling for further investigation of this effect. Cyanoacrylate has been investigated in other surgical interventions. A 2008 prospective, randomized multicenter clinical trial in patients undergoing elective open hernia repair demonstrated cyanoacrylate-based microbial sealant independently reduced wound contamination over the course of the operation. Due to the potentially devastating complications associated with postoperative infection, the investigators seek to find alternative methods of prevention of surgical site infection.


  • Device: Floraseal
    • FloraSeal is a cyanoacrylate-based sealant used in the prevention of surgical site infections.

Arms, Groups and Cohorts

  • Experimental: Floraseal
    • The surgical site will first be cleaned with isopropyl alcohol. Once the site is dry, alcohol based chlorhexidine gluconate preparatory solution will be applied to the surgical site. Once dry, the FloraSeal surgical preparatory solution will be applied per the manufacturers recommendations. The extremity will be draped in sterile fashion however adhesive drapes over the surgical site itself will not be applied.
  • No Intervention: Control
    • The operative site is first cleaned with isopropyl alcohol. Once the site is dry, alcohol based chlorhexidine gluconate preparatory solution will be applied to the surgical site. The operative site will then be draped in sterile fashion. An iodine impregnated adhesive drape will then be applied to the surgical site.

Clinical Trial Outcome Measures

Primary Measures

  • Appearance of Surgical Site
    • Time Frame: 90 days from date of surgery
    • The surgical incision will be checked post-operatively for signs of infection or dehiscence.

Secondary Measures

  • Intra-operative cultures
    • Time Frame: Intra-operative – Cannot be clearly defined as it will depend on the duration of the surgical procedure.
    • Five wound cultures will be obtained at various points during the operation to test for contamination of the surgical site
  • Post-operative complication – Antibiotic administration
    • Time Frame: 90 days from date of surgery
    • Some surgical site infections may be managed with either intravenous or oral antibiotics. Both groups will be followed to see if either required antibiotic administration.
  • Post-operative complication – Re-operation
    • Time Frame: 90 days from date of surgery
    • Some surgical site infections require surgical debridement. Patients will be followed to determine which patients require re-operation.

Participating in This Clinical Trial

Inclusion Criteria

  • > 18 years of age – Have signed the written informed consent form Exclusion Criteria:

  • Patients not fluent in the language of the informed consent form – Prisoners – Pregnancy – Reported to have mental illness or belonging to a vulnerable population – History of dermatitis or allergic reaction to cyanoacrylate based materials or iodine – Patients undergoing revision total joint arthroplasty secondary to infection – Allergy to Iodine. – Patients undergoing total joint arthroplasty in the setting of acute trauma

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: N/A

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • University of Miami
  • Collaborator
    • Osteoremedies
  • Provider of Information About this Clinical Study
    • Principal Investigator: Victor Hugo Hernandez, Assistant Professor, Arthroplasty & Joint Reconstruction – University of Miami
  • Overall Official(s)
    • Victor H Hernandez, MD, Principal Investigator, University of Miami


Prince D, Kohan K, Solanki Z, Mastej J, Prince D, Varughese R, et al. Immobilization and death of bacteria by Flora SealĀ® microbial sealant. International Journal of Pharmaceutical Science Invention. 2017 Jun;6(6):45-9.

Zhang S, Ruiz R. FloraSealĀ® microbial sealant: a comprehensive solution to skin flora. 2015.

Lorenzetti AJ, Wongworawat MD, Jobe CM, Phipatanakul WP. Cyanoacrylate microbial sealant may reduce the prevalence of positive cultures in revision shoulder arthroplasty. Clin Orthop Relat Res. 2013 Oct;471(10):3225-9. doi: 10.1007/s11999-013-2854-5.

Towfigh S, Cheadle WG, Lowry SF, Malangoni MA, Wilson SE. Significant reduction in incidence of wound contamination by skin flora through use of microbial sealant. Arch Surg. 2008 Sep;143(9):885-91; discussion 891. doi: 10.1001/archsurg.143.9.885.

Bailey IS, Karran SE, Toyn K, Brough P, Ranaboldo C, Karran SJ. Community surveillance of complications after hernia surgery. BMJ. 1992 Feb 22;304(6825):469-71. Erratum in: BMJ 1992 Mar 21;304(6829):739.

Webster J, Alghamdi A. Use of plastic adhesive drapes during surgery for preventing surgical site infection. Cochrane Database Syst Rev. 2015 Apr 22;(4):CD006353. doi: 10.1002/14651858.CD006353.pub4. Review.

Fairclough JA, Johnson D, Mackie I. The prevention of wound contamination by skin organisms by the pre-operative application of an iodophor impregnated plastic adhesive drape. J Int Med Res. 1986;14(2):105-9.

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