OFTEN

OxFord venous ThromboEmbolism risk Number (OFTEN) assessment for lower limb immobilisation in outpatients

The process agreed locally at OUHFT is to risk assess all patients aged 16 years or more with a form of lower limb immobilisation (e.g. plaster cast, brace, removable boot). Patients should be assessed using the OxFord venous ThromboEmbolism risk Number (OFTEN) assessment.

Please click on the link below to find the OFTEN scoring system and user guide:

http://ouh.oxnet.nhs.uk/Pharmacy/Mils/MILV10N8.pdf

Document the OFTEN score in your clinical notes

Prescribe Dalteparin if indicated to do so by OFTEN score

OFTEN SCORE

	Score
Age > 60	1
Obese (BMI >30)	1
Varicose Veins with Phlebitis	1
Oestrogen containing Contraceptive	1
Use of HRT	1
One of more long term medical conditions requiring treatment such as heart disease, lung disease	1
Known Blood clotting disease/thrombophilia: Low risk thrombophilias (heterozygous for Factor V Leiden mutation or prothrombin or prothrombin gene G20210A mutation. High risk thrombophilias	1 2
Active cancer or cancer treatment	2
Pregnancy (or within 6 weeks of childbirth)	2
Previous VTE	2
Achilles tendon rupture	2
Recent lower limb surgery (operative time >60mins)	2

 

SCORE	Recommendation
0-1	Mobilisation as advised by medical practitioners. Give the patient information leaflet on 'VTE and Plaster Casts'
2	If no contraindication to dalteparin, prescribe prescribe dalteparin prophylaxis daily until end of immobilisation or lower limb in cast/boot reviewed on an individual basis depending on mobility. Refer to the flowsheet for Venous Thromboprophylaxis for lower limb immobilisation in Outpatients.