[Viability monitor of free flaps in hypopharynx reconstruction].

Single-stage microvascular reconstruction of neck defects with jejunum or other free flaps are well established methods. However, these flaps usually are buried subcutaneously and viability surveillance is difficult. Alternatively to technical monitoring devices, we present a simple method using a "sentinel" part of the free jejunum flap transposed outside to the skin surface or sutured into the skin when using fasciocutaneous or myocutaneous flaps. Although this method is not new, it is rarely used. Compared to pure technical monitoring devices, it is easily performed and monitoring of buried free flaps especially in the neck region is reliable.