predisposing factors
Last edited 06/2018 and last reviewed 09/2023
Some risk factors suggest greater risk of venous thromboembolism than others:
- strong risk factors (odds ratio > 10)
- fracture (hip or leg)
- hip or knee replacement
- major general surgery
- major trauma
- spinal cord injury
- intermediate risk factors (odds ratio 2 to 9)
- arthroscopic knee surgery
- central venous lines
- chemotherapy
- chronic heart or respiratory failure
- hormone therapy
- malignancy
- oral contraceptive therapy
- paralytic stroke
- pregnancy/postpartum
- previous venous thromboembolism
- thrombophilia
- weak risk factors (odds ratio < 2)
- bed rest longer than 3 days
- immobility due to sitting (e.g. – car or air travel longer than eight hours_
- increasing age
- laproscopic surgery
- obesity (BMI>40kg/mm2)
- pregnancy/antepartum
- varicose veins (1)
Reference:
paroxysmal nocturnal haemoglobinuria
varicose veins and deep vein thrombosis
thrombophilia screen or screening
non-steroidal anti-inflammatory drugs (NSAIDs) and venous thromboembolism (VTE)