the investigators hypothesize that patients do not understand these therapies, and that they are poorly undertaken. In some cases, the anesthesiologist does not understand correctly the indication of the treatment due to lack of information and therefore does not know how to adapt it to the medical situation.~the investigators want to investigate these transitions: how were they understood by patients, how were they performed, and how does this affect surgery, postoperative morbidity and mortality?~Anticoagulation for prevention of thromboembolic events will not be studied in this study.~The anesthesia team will not be particularly trained in anticoagulants and antiplatelets management to be close to actual care. In the Hospital the investigators have a guide written in 2013 in order to describe all the cases possible. The control/ goal group will be the patients who have undertaken strictly the protocol described for their cases in the guide.
the investigators hypothesize that patients do not understand these therapies, and that they are poorly undertaken. In some cases, the anesthesiologist does not understand correctly the indication of the treatment due to lack of information and therefore does not know how to adapt it to the medical situation.