Plastic and Reconstructive Surgery: Skin Grafts, Flaps, and Wound Closure Techniques

Plastic and Reconstructive Surgery: Skin Grafts, Flaps, and Wound Closure Techniques

Plastic and reconstructive surgery restores form and function to tissue damaged by trauma, burns, tumor removal, or congenital conditions. As a surgical technologist, your role centers on maintaining a precise sterile field, anticipating the surgeon's needs, and handling delicate instruments and closure materials with exceptional care. Even small errors in technique—a dragged needle, an improperly loaded dermatome, or contaminated tissue adhesive—can compromise a patient's outcome.

Skin Grafts: Types and Principles

A skin graft is tissue harvested from one area of the body (the donor site) and transferred to a wound bed (the recipient site). Grafts require a well-vascularized wound bed to survive because they depend on in-growth of new blood vessels.

Split-thickness skin grafts (STSG) include the epidermis and only a portion of the dermis. They are harvested with a dermatome and are used for large burns, chronic wounds, and after tumor excision. Because the donor site retains enough dermis to re-epithelialize, it heals on its own.

Full-thickness skin grafts (FTSG) include the epidermis and the entire dermis. They provide better cosmetic results and are used for smaller defects on the face or hands. The donor site must be closed primarily.

The Dermatome: Loading and Safety

A powered or air-driven dermatome cuts a graft of controlled thickness (typically measured in thousandths of an inch or millimeters, depending on the instrument). Before handing it to the surgeon, you must:

1. Load the blade into the head according to the manufacturer's guide, ensuring it is seated and locked. Confirm the blade guard is in place until the instrument is passed.

2. Set thickness and width as directed by the surgeon.

3. Lubricate the skin at the donor site with mineral oil or a sterile lubricant to allow smooth, even gliding.

4. Pass the dermatome handle-first, perpendicular to the field.

Safety alert: The dermatome blade is extremely sharp. Never pass a loaded dermatome without a neutral zone. Always verbalize "sharp" or "blade" when passing. If the blade guard is removable, keep it on until the surgeon signals readiness.

After harvest, the graft may be meshed using a graft mesher to expand its coverage area and allow fluid drainage. The graft is kept moist on a moist sponge or in saline until placement.

Local and Regional Flaps

A flap differs from a graft because it retains its own blood supply. Local flaps borrow adjacent tissue and rotate, advance, or transpose it to cover a defect. Common examples include the rotation flap, the advancement flap, and the Z-plasty (used to release contractures and redirect scars). The surgical technologist must anticipate multiple instrument exchanges, frequent irrigation, and careful hemostasis during flap procedures.

Suture Techniques in Plastic Surgery

Plastic surgery demands meticulous wound closure to minimize scarring. You will encounter the following:

• Subcuticular (intradermal) suture: A running suture placed horizontally through the dermis, just below the skin surface, using fine absorbable suture (often 4-0 or smaller). It avoids suture-mark scarring and is ideal for cosmetic closures.
• Simple interrupted sutures: Individual sutures that distribute tension evenly and allow selective removal; non-absorbable monofilament (e.g., 5-0 or 6-0) is common on the face.
• Vertical mattress sutures: Provide strong tissue eversion and are used where tension reduction is important.
• Horizontal mattress sutures: Distribute tension across a wider area.

Knot tension matters: too tight causes tissue necrosis; too loose leaves dead space or wound dehiscence. Practice consistent square knots with instrument ties, using smooth, controlled movements.

Additional Closure Materials and Wound Management

Tissue adhesive (cyanoacrylate): Applied topically to approximate skin edges on small, low-tension wounds. It must remain on the sterile field in its applicator until use; do not allow it to contact gloves unintentionally.

Steri-Strips (adhesive skin closure strips): Applied after subcuticular closure for added support. The skin surface must be dry and free of blood for proper adhesion. Apply benzoin tincture to the surrounding skin first if directed.

Wound VAC (negative pressure wound therapy): Used on complex or donor site wounds to promote healing. The foam or gauze dressing is cut to fit the wound, sealed with an occlusive drape, and connected to a suction canister and pump. Confirm tubing connections are patent and the seal is airtight before the dressing is considered complete.

Back Table Setup: Sequence and Logic

Organize your plastic surgery back table in the order of expected use:

1. Draping and initial exposure instruments

2. Dermatome and lubricant

3. Graft mesher and moist basin for graft storage

4. Fine suture (deepest layers first, then superficial)

5. Tissue adhesive and Steri-Strips

6. Wound VAC components (last, for dressing after closure)

Being able to defend your setup means knowing why each item is positioned where it is. Surgeons and circulating nurses rely on your logical preparation to maintain efficiency and patient safety.

Scope of Practice and Patient Safety

You do not select suture type, graft thickness, or wound VAC settings independently—these are the surgeon's decisions. Your role is to have the correct materials ready, maintain sterility, and handle sharps safely. Report any breach in sterile technique immediately. Grafts exposed to air or contaminants must be communicated to the surgeon at once.