Figure 2

Flowchart of high-risk patients: medical and surgical. Abbreviations: IPC = intermittent pneumatic compression, GCS = graduated compression stockings, ACCP = American College of Chest Physicians-2004 Recommendations. * Risk factors for bleeding that were used to define "contraindications to anticoagulant prophylaxis" include any of the following conditions present at current admission: - Intracranial hemorrhage - Hepatic impairment (clinically relevant) - Bleeding at hospital admission (exclude if anticoagulant started after any type of surgery) - Active gastro-duodenal ulcer (exclude if anticoagulant started after gastric/colon/small bowel surgery) - Known bleeding disorders (congenital or acquired).