03 / Plastic & Reconstructive Surgery · open
Split-thickness skin graft
Borrowing the top layers of skin from a healthy site to resurface a wound that cannot close itself; the graft survives on the bed it lands on, which is the whole art.
Indication: Burns after excision, large wounds with a healthy granulating bed, donor coverage after flap harvest.
Read the imaging first
Practice before you scrub
Size the burn, find the danger
A house fire: burns to the anterior trunk and one whole arm, charted on arrival. (Fictional educational case.)
- Honest area assessment is treatment: the fluid formula inherits every charting error, in both directions.
- Circumferential deep burns are compartment syndromes: the escharotomy done possibly-early beats the one done certainly-late.
On the tray for this operation
Test yourself on the tray
Scalpel
Sharp division of tissue, most visibly the skin incision.
DeBakey forceps
Atraumatic handling of vessels, bowel, and delicate tissue.
Electrosurgical pencil
Cutting and coagulating with high-frequency current.
Adson forceps
Precise skin handling during closure.
Metzenbaum scissors
Fine dissection of delicate tissue and planes.
Needle driver
Holding the curved needle while suturing.
Stage
1 / 4
Preparing the recipient bed
The wound is debrided to healthy, bleeding, uninfected tissue; haemostasis is meticulous.
Watch for: Grafting onto an unfit bed · Haematoma lifting the graft later
Why are we operating?
Split-thickness skin grafting resurfaces wounds that cannot close themselves: a shaving of epidermis and partial dermis is lifted from a donor site, often meshed to expand its reach, and laid on a vascular bed that must adopt it. It is the reconstructive ladder's workhorse rung, covering burns, trauma and excision defects, and everything about its success is the bed's biology plus the enemy trio of blood, shear and infection.
Pulls toward surgery
Gives the team pause
Shared foundations
What the surgeon is thinking
Preparing the recipient bed
Why is the bed's preparation the operation's true determinant?
A graft arrives with no blood supply and survives its first days by drinking plasma (imbibition) before capillaries link up (inosculation): only a clean, vascular, haemostatic bed can perform that adoption. Debridement to healthy tissue and fastidious haemostasis are the graft's life support, arranged before it arrives.
Harvesting the graft
What is the dermatome actually calibrating?
Depth: a split graft takes epidermis and a slice of dermis, leaving dermal appendages behind so the donor site re-epithelialises within a fortnight. Too thin and the graft is fragile; too deep and the donor becomes a full-thickness wound of its own making. The even shave, uniform pressure and angle, is the craft.
Meshing and application
What does meshing buy, and what does it spend?
Expansion, drainage and conformity: the mesh covers more area, lets blood and serum escape through its interstices rather than lifting the graft, and drapes into contours. It spends appearance, the lattice pattern is permanent, which is why faces and hands usually receive unmeshed sheet grafts.
Dressing and immobilisation
Why is immobilisation named as a stage rather than an afterthought?
Because shear is the graft's second assassin: the capillary connections of inosculation are gossamer for days, and a graft that slides even millimetres tears them. The bolster or negative-pressure dressing and any splint exist to make micro-movement impossible until the plumbing holds.
Decision points
Mesh the graft or lay it as a sheet?
Meshed
Large areas, uneven contours, oozy beds: expansion plus built-in drainage, at the cost of the permanent lattice.
Sheet
Face, hands, and anywhere appearance leads: better cosmesis, but seromas and haematomas must be evacuated promptly from under an unfenestrated roof.
The choice is a values conversation with anatomy attached: coverage arithmetic and bed quality versus the permanent record of the mesh pattern. Saying which master the site serves usually answers it.
The bed oozes despite haemostasis. Graft now or delay?
Delayed application
Harvest, store the graft, dress the bed, and apply at the bedside or theatre in 24-48 hours onto a dry surface: the graft survives storage better than it survives a haematoma.
Graft now over drainage strategies
Meshing, quilting sutures and negative pressure all mitigate ooze: acceptable when the bleeding is capillary and the strategy is deliberate.
Blood is the graft's first assassin: a haematoma is a spacer between graft and blood supply. Delay costs days; regrafting costs a donor site. The humble decision usually wins.
Leaving the OR
The handoff
- Procedure
- Split-thickness graft, meshed 1.5:1, to debrided lower-leg wound; donor left thigh
- Fixation
- Stapled edges, negative-pressure bolster; leg splinted and elevated
- Donor site
- Dressed per protocol; often the sorer wound, analgesia prescribed accordingly
- Watch for
- Bolster undisturbed until planned check; distal perfusion around dressings; donor pain control
A fictional educational patient, handed over the way real ones are.
The postoperative course
- POD 0-4The dressing stays: the graft is plumbing itself in and every peek is a shear event. Elevation and immobility are the treatment.
- POD 5First take-down: percentage take estimated honestly and documented; small losses granulate, larger ones name their assassin (blood, shear, infection) and plan the response.
- Week 2Donor site re-epithelialised or nearly; mobilisation graduated as the graft matures; moisturiser and massage begin their long careers.
- MonthsThe graft contracts and matures over a year: splints and therapy where contracture threatens function, and sun protection for skin that will always burn more easily.
Watch it done
Split-thickness skin graft
Harvest with the dermatome, meshing and fixing the graft, and the donor site.
Source: Children's Hospital Colorado · Watch on YouTube