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Skin Mesher

The skin mesher is a device that takes a harvested split-thickness skin graft (STSG) and cuts parallel slits through it, allowing the graft to expand to cover a larger surface area than the original harvest. Standard adjunct to STSG harvest when the donor area is smaller than the recipient area.

Design​

  • Roller-based device with a slotted carrier (plastic or mesh)
  • STSG is laid on the carrier; the roller cuts slits at a fixed ratio
  • Expansion ratios: typically 1.5:1, 2:1, 3:1, 4:1, 6:1, 9:1 depending on carrier

Why Mesh a Graft​

  • Expansion — a 2:1 mesh expands donor area by 2× when spread on the recipient
  • Drainage — slits allow exudate to drain through the graft, reducing seroma / hematoma that could lift the graft
  • Conformability — meshed graft drapes over contoured surfaces more easily than sheet graft
  • Flexibility — meshed graft flexes with the underlying tissue better than sheet graft

Trade-offs​

  • Cosmesis — meshed grafts show the slit pattern after healing (a "fishnet" appearance); sheet grafts heal more uniformly
  • Contraction — meshed grafts contract slightly more than sheet grafts

Use in Reconstructive Urology​

  • Scrotal reconstruction after Fournier's gangrene — routinely meshed at 1.5:1 or 2:1 to conform to the contoured scrotal bed
  • Large perineal debridement wounds — meshed grafts expand donor area and drain efflux
  • Buried-penis reconstruction — shaft resurfacing with meshed or sheet STSG depending on cosmetic priorities
  • Post-radical skin excision for hidradenitis or chronic dermatitis

Technique​

  1. Harvest STSG with a dermatome (Zimmer, Padgett, or manual)
  2. Place the graft on the mesher carrier in the selected ratio
  3. Roll the graft through the mesher
  4. Lift the meshed graft and spread it gently on the recipient bed
  5. Secure with staples or sutures; quilt to the bed (see Quilting Stitch) to prevent shear

See also: Zimmer Air Dermatome, Padgett Dermatome, STSG, Quilting Stitch, Fournier's Gangrene.