Changes in area and thickness of expanded and unexpanded axial pattern skin flaps in pigs

Craig A. VanderKolk, John J. McCann, Geraldine M. Mitchell, Bernard Mc C. O'Brien

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The pig buttock flap model was used firstly, to compare changes in expanded axial skin flap area with control flaps prior to flap elevation and 3 or 4 months post-flap inset and, secondly, to compare the thickness of expanded and control flaps at elevation and for 3 to 6 months post-flap inset. Following 5 weeks' expansion and prior to elevation, the expanded tissue had gained a significant 63.3% mean increase in area compared with the control tissue (p < 0.01). Immediately post elevation and inset, the expanded flaps were still significantly larger than the control flaps by a mean 29.8% (p < 0.01) but had lost 56% of the original area gained. Little change in area occurred in the 3 months post-flap inset as the expanded flaps were still a mean 23.4% larger than the control (p < 0.01). Dermal and cellular non-keratinised epidermal layers thickened markedly in expanded skin compared to control skin. Following elevation and inset of the flaps, both dermis and epidermis thickened in expanded and control flaps.

Original languageEnglish (US)
Pages (from-to)284-293
Number of pages10
JournalBritish Journal of Plastic Surgery
Issue number3
StatePublished - May 1988
Externally publishedYes

ASJC Scopus subject areas

  • Surgery
  • Otorhinolaryngology


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