Se denomina colgajo al transporte de tejido desde un area receptora hasta un area donante, manteniendo su pediculo conservado, se realiza en la mayoria de los casos para cubrir defectos muy grandes o profundos de tejidos que han sido danados a causa de un traumatismo o una enfermedad. Un colgajo libre se refiere a aquel que ha sido separado de su sitio anatomico normal para ser colocado en otro distinto de tal manera que sea reinsertado nuevamente a traves de sus pediculos por medio de la microcirugia. Deben tenerse en cuenta las complicaciones que esta cirugia pue de traer, ya que el colgajo debe estar completamente irrigado. Abstract Flap is called the transport of tissue from an area until receiving a donor area, while maintaining its pedicle preserved, is performed in most cases to cover defects very large or deep tissues that have been damaged as a result of trauma or a disease. A free flap refers to one who has been separated from their normal anatomic site to be placed in another different in such a way that it is reinserted again through its pedicles by means of the microsurgery. Keywords: flap, microsurgery, pedicle, trauma