Stages of Graft Survival

(Table 6-8)
  • Skin graft must re-establish blood supply at recipient sites
  • Three stages: imbibition, inosculation, neovascularization
   
 
Table 6-8 Stages of Skin Graft Survival
 StagesDescription
1. Imbibition
First 24–48 h (ischemic period)

Graft sustained by plasma exudate from wound bed

Fibrin attaches graft to new bed

Graft becomes edematous, ↑ weight by up to 40%
2. Inosculation
Begins 48–72 h, lasts up to 7–10 days
(graft vessels anastomose)

Revascularization linking dermal vessels in graft to recipient bed

Rationale for delayed grafting over sites devoid of perichondrium or periosteum
(allows formation of granulation tissue with ↑ survival rate)
3. Neovascularization
Occurs temporally with inosculation

Capillary ingrowth from recipient wound base and sidewalls to graft

If optimal conditions, full circulation reestablished within 4–7 days
4. Maturation
Occurs months later

Reinnervation of graft typically within 2 months of graft but may not be complete for months to years
(full sensation may never fully return)