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Burns. 2016 Dec;42(8):1756-1765. doi: 10.1016/j.burns.2016.06.013. Epub 2016 Aug 27.

Calculations for reproducible autologous skin cell-spray grafting.

Author information

1
Bioreactor Group, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
2
The Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
3
The Department of Bioengineering, Case Western Reserve University, Cleveland, OH, USA.
4
University of Pittsburgh Medical Center, UPMC Mercy Trauma and Burn Center, Pittsburgh, PA, USA.
5
The Plastic Surgery Department, University of Pittsburgh, Pittsburgh, PA, USA.
6
Bioreactor Group, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA. Electronic address: jgerlach@pitt.edu.

Abstract

Non-cultured, autologous cell-spray grafting is an alternative to mesh grafting for larger partial- and deep partial-thickness burn wounds. The treatment uses a suspension of isolated cells, from a patient's donor site skin tissue, and cell-spray deposition onto the wound that facilitates re-epithelialization. Existing protocols for therapeutic autologous skin cell isolation and cell-spray grafting have defined the donor site area to treatment area ratio of 1:80, substantially exceeding the coverage of conventional mesh grafting. However, ratios of 1:100 are possible by maximizing the wound treatment area with harvested cells from a given donor site skin tissue according to a given burn area. Although cell isolation methods are very well described in the literature, a rational approach addressing critical aspects of these techniques are of interest in planning clinical study protocols. We considered in an experimental study the cell yield as a function of the donor site skin tissue, the cell density for spray grafting, the liquid spray volume, the sprayed distribution area, and the percentage of surface coverage. The experimental data was then used for the development of constants and mathematical equations to give a rationale for the cell isolation and cell-spray grafting processes and in planning for clinical studies.

KEYWORDS:

Burns; Cell-spray grafting; Equations; Keratinocytes; Wound healing

PMID:
27575672
DOI:
10.1016/j.burns.2016.06.013
[Indexed for MEDLINE]

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