[Validity time of normal results of preoperative tests for surgical reintervention and the impact on postoperative outcomes].

Background And Objective: There are few data defining the period of time in which preoperative tests can be considered valid. The purpose of this study was to determine the likelihood of changes in the results of preoperative tests previously normal in relation to time, and the impact of these changes on postoperative outcomes.

Methods: A total of 970 patients with normal preoperative tests before the first surgery and who required a new intervention were included.