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Cyanoacrylate Tissue Adhesives — Dermabond, Histoacryl

Cyanoacrylate adhesives are liquid monomers that polymerize on contact with tissue moisture into a rigid adhesive film. Their primary role in reconstructive urology is topical skin closure — the final layer over a subcuticular suture — but they also have niche applications in mucosal adhesion, vessel embolization (interventional radiology), and experimental GU-tract applications.[1]

Chemistry​

FormStructureClinical use
n-butyl cyanoacrylateHistoacryl (Braun); Indermil (Covidien)Mucosal use; older generation; harder/brittle polymer
2-octyl cyanoacrylateDermabond (Ethicon); SurgiSeal (Adhezion)Topical skin closure standard; more flexible polymer
n-butyl + octyl blendLiquiBand (Advanced Medical Solutions)Flexible skin application

Polymerization​

  • Liquid monomer applied to tissue
  • Moisture from tissue surface triggers anionic polymerization
  • Sets within 30–60 seconds; full strength in 2–3 minutes
  • Exothermic reaction — minor warmth during set
  • Polymer film sloughs off the skin over 5–10 days as epithelium turns over

GU Applications​

1. Topical skin closure​

The dominant use. Applied over a subcuticular suture (typically 4-0 or 5-0 Monocryl) as a waterproof topical seal.

  • Penoscrotal / penile incisions after prosthesis surgery, urethroplasty
  • Abdominal port sites after robotic GU reconstruction
  • Pfannenstiel and midline closures as a skin-level seal over subcuticular suture
  • Vulvar / perineal incisions after urogynecologic surgery

Advantages over adhesive strips (Steri-Strips):

  • Waterproof within 1 minute — patient can shower same day
  • No strip lifting at body folds
  • No removal step required
  • Equivalent or superior cosmetic outcomes at 6 months

2. Mucosal adhesion (n-butyl)​

  • Histoacryl is used in endoscopic GI practice for variceal obliteration; not standard in GU mucosa
  • Occasional experimental use for mucosal flap fixation in reconstructive work

3. Interventional radiology (not surgical)​

  • N-butyl cyanoacrylate is used by IR for vessel embolization (varicoceles, AVMs)
  • Not applied intraoperatively by the reconstructive surgeon but worth knowing in overlap cases

Application Technique (Topical Skin)​

  1. Complete deep-layer closure — fascia, dartos, dermis/subcuticular — before applying cyanoacrylate
  2. Approximate skin edges with fingers or forceps; no tension should remain
  3. Dry the skin — apply over dry, approximated edges
  4. Apply thin layer over the closure line with the applicator tip — 1–2 coats
  5. Hold for 30 seconds as it sets
  6. Do not use within wounds — cyanoacrylates go on top of closed skin, never inside
  7. Avoid occlusive dressings over fresh adhesive — can cause premature lifting

Contraindications and Cautions​

  • Do not apply to mucosa or within body cavities — the heat of polymerization and the adhesive foreign body are poorly tolerated on mucosal surfaces
  • Do not apply to wounds under tension — will crack and fail; the wound must already be approximated by deep sutures
  • Eye exposure — direct conjunctival contact can bond the eyelid shut; occlusive eye protection during facial application
  • Alcohol cleansers — alcohol on the skin before application can ignite during set reaction; use saline or chlorhexidine-alcohol with dry-time adherence
  • Latex allergy — some brands have latex packaging components
  • Contaminated wounds — do not use over infected or grossly contaminated wounds

Advantages Over Sutures / Strips​

FeatureCyanoacrylateSutureSteri-Strip
Application time30–60 secMinutes per stitchMinutes to place
WaterproofImmediateAfter 24–48 hNot waterproof
Cosmetic at 6 moEquivalentEquivalentInferior
Removal neededNone (sloughs)Yes (unless absorbable)Falls off
Infection riskLowSuture abscess possibleLow
Patient comfortHighModerateHigh

See Also​

References​

1. Singer AJ, Quinn JV, Hollander JE. The cyanoacrylate topical skin adhesives. Am J Emerg Med. 2008;26(4):490–6. doi:10.1016/j.ajem.2007.05.015