Detailed Description:

Currently evidence-based medicine is one of the most important tools guiding our medical practice. Part of this evidence has been generated from clinical records, which has allowed access to large databases from which relevant information has been obtained for perioperative risk stratification, searching for complications, having specific information on procedures, among others. A clear example, especially useful daily in anesthesia work, is the NSQIP score, a tool that allows calculating perioperative risk according to the conditions of the patient and the surgery. NSQIP score is considered to make decisions in both the American and the European guidelines for preoperative evaluation for surgery. Latin-American or Chilean databases are not available at the present time. Chile lacks of population perioperative databases, methodology and practice of medicine outcomes records, thus making necessary the generation of a retrospective/prospective registry. The investigators expect that this registry will allow the collection of perioperative information appropriate to characterize the Chilean population, observe its evolution, and detect risk factors. Moreover, this registry will grant the investigators the means to design new research studies that may allow them to gather medical evidence of superior quality, thus benefiting patients with the best and safest interventions and procedures.}}