NEUTROPHIL LOCALIZATION FOLLOWING REPERFUSION OF ISCHEMIC SKIN FLAPS

A swine model of island latissimus dorsi myocutaneous and buttock cutaneous flaps was used to examine neutrophil localization and flap survival after 6 hours of global ischemia followed by 24 hours of reperfusion. Radioactivity from autotransfused neutrophils labeled with indium-111 enabled their localization. Radioactivity in ischemic latissimus dorsi flaps was increased by 101 +/- 30 percent over contralateral control latissimus dorsi flaps (n = 6, p = 0.0 1). Radioactivity in ischemic buttock flaps was increased by 142 +/- 40 percent over contralateral control buttock flaps (n = 6, p = 0.008). Despite increased neutrophil localization to ischemic flaps, the magnitude of tissue radioactivity failed to provide sufficient information to predict ischemic injury as measured by flap survival and tissue water content.