Tissue expansion is a common technique for acquiring enough tissue to reconstruct large defects; however, the problem of increased risk of flap necrosis in expanded flaps has not yet been adequately addressed. Indocyanine green angiography (ICGA) is a near-infrared laser activated, non-radioactive, real-time fluorescent imaging system that has allowed for the quantitative evaluation of flap perfusion. Nevertheless, a universally accepted threshold value for evaluating the viability of expanded flaps has not yet been established. Since our institution routinely treats patients with massive defects to be reconstructed with an expanded flap, we determined the optimal fluorescent cutoff value for intraoperative decision making to prevent postoperative necrosis.
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