When postoperative pharmacological thromboprophylaxis is indicated, we suggest starting it between the 12th and 24th postoperative hour* .（Evidence level:moderate/Low；Recommendation grade:Strong）

In non-elective surgery, when surgery is delayed by more than 12 hours and pharmacological thromboprophylaxis is indicated, we suggest starting it preoperatively with LMWH, with a minimal interval of 12 hours between the last LMWH injection and surgery.（Evidence level:moderate/Low；Recommendation grade:Strong）

We recommend that safety time intervals be observed between pharmacological thromboprophylaxis and neuraxial anesthesia.（Evidence level:High；Recommendation grade:Strong）

We recommend an early outpatient preoperative anaesthesia assessment to reduce day-of-surgery cancellations and length of hospital stay. (Evidence level:Low；Recommendation grade:Strong)

We recommend that telemedicine and standardised questionnaires be used as part of the preoperative anaesthesia assessment to improve patient accessibility to preanaesthesia care and their satisfaction. (Evidence level:moderate；Recommendation grade:Strong)

We suggest performing the preoperative assessment before the day of surgery, preferably within 30 days. However, we advise an updated comprehensive review by the attending anaesthetist within the 48 h before surgery. (Evidence level:very Low；Recommendation grade:weak)

We suggest conducting the preoperative assessment as early as possible but within 30 days of the planned procedure for high-risk patients, to allow patient optimisation and fitness improvement for surgery. (Evidence level:very Low；Recommendation grade:weak)

We suggest referral to a specialist (cardiologist, pneumologist, allergologist, etc.) to make an accurate diagnosis and, if the patient's underlying condition can be improved, to set out a time scale and treatment regimen to obtain this improvement. Only at the end of this process, when the patient is ‘optimised’, can the anaesthetist make a prediction/estimate of the risk. (Evidence level:very Low；Recommendation grade:weak)

An expert anaesthetist should coordinate the preoperative evaluation involving a multidisciplinary team discussion when needed. (Evidence level:very Low；Recommendation grade:weak)

We suggest using the Revised Cardiac Risk Index (RCRI) score in preoperative patient risk stratification. (Evidence level:Low；Recommendation grade:weak)