A Comparison of Skin Graft Techniques with and without Plaster Back Slab Dressing in Reducing Donor Site Morbidity in Radial Forearm Free Flap Surgery - A Retrospective Study.

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The radial forearm free flap (RFFF) is a commonly used free flap for the reconstruction of orofacial defects because of its versatility and reliability. The donor site is closed with either split or full-thickness skin graft, and one of the common donor site morbidities is skin graft failure. Various techniques to minimise skin graft failure were reported, and we compared the skin graft techniques with and without plaster back slab dressing in the radial forearm donor site. This is a retrospective study of 75 patients who had RFFF for reconstruction of oral cavity cancer at two different tertiary teaching hospitals in the United Kingdom between April 2015 and March 2020. Thirty-nine patients from Hospital one had volar back slap, bolster dressing and crepe bandage. In contrast, 36 patients from Hospital two had only pressure dressing without a back slab. The mean age of the study population was 60.65 (P = 0.274). In both groups, two patients had donor site complications. However, there was no significant difference in the donor site skin graft complications with a P = 0.662. There was no evidence in the literature to support an ideal bandage for skin graft at the RFFF donor site. Our comparison of two techniques of skin graft dressings with and without back slap did not show any difference in the skin graft take, and the volar back slab did not add any additional benefits. The simple use of foam as a bolster dressing without a back slab is ideal for the radial forearm free flap donor site.