Table 2.

Traumatic brain injury (TBI) venous thromboembolism (VTE) prevention clinical practice guideline. Modified Berne-Norwood criteria for VTE risk in TBI patients

Low Risk	Moderate Risk	High Risk
• No moderate or high risk criteria	• Subdural or epidural hematoma > 8 mm	• Placement of an intracranial pressure monitor
	• Contusion or intraventricular hemorrhage > 2 cm	• Craniotomy
	• Multiple contusions per lobe	• Evidence of progression at 72 h
	• Subarachnoid hemorrhage with abnormal CT
	• Evidence of progression at 24 h
• Initiate pharmacologic prophylaxis if repeat head computed tomography (CT) stable at 24 h	• Initiate pharmacologic prophylaxis if head CT stable at 72 h	• Consider placement of an inferior vena cava filter