Guidelines
Risk Assessment
NICE recommends the Department of Health VTE risk assessment tool
Anti-Embolism Stockings
Contraindications to Anti-Embolism Stockings
Contraindications outlined by NICE:
- Peripheral arterial disease
- Peripheral arterial bypass grafting
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Peripheral neuropathy or other causes of sensory impairment
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Severe leg oedema
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Major limb deformity or unusual leg size or shape preventing correct fit
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Any local conditions in which anti-embolism stockings may cause damage – for example, fragile 'tissue paper' skin, dermatitis, gangrene or recent skin graft
- Known allergy to material of manufacture
Use of Anti-Embolism Stockings
NICE recommendations:
- Use anti-embolism stockings that provide graduated compression and produce a calf pressure of 14-15 mmHg
- Measure the person's leg size and offer the correct size of stocking
- Encourage the person to wear it day and night until they no longer have significantly reduced mobility
- Remove anti-embolism stockings daily for hygiene purposes and to inspect skin condition.
- In people with a significant reduction in mobility, poor skin integrity or any sensory loss, inspect the skin 2 or 3 times a day, particularly over the heels and bony prominences
- Stop the use of anti-embolism stockings if there is marking, blistering or discolouration of the skin, particularly over the heels and bony prominences, or if the person experiences pain or discomfort
- If suitable, intermittent pneumatic compression can be offered as an alternative
Anti-embolism stockings are passive and static, providing constant graded compression to improve venous return.
Intermittent pneumatic compression devices provide active periodic compression (cyclic inflation and deflation) to mimic the calf muscle pump.
Thromboprophylaxis in Various Orthopaedic Surgeries
NICE outlined different recommendations depending on the type of orthopaedic surgery.
Any Lower Limb Immobilisation
Definition: any clinical decision taken to manage the affected limb in a way that would prevent normal weight-bearing status or use of that limb, or both.
Consider LMWH or fondaparinux sodium if VTEVenous thromboembolism risk outweighs risk of bleeding.
Fragility Pelvis / Hip / Proximal Femur Fractures
Offer VTEVenous thromboembolism prophylaxis to ALL patients.
1st line:
- LMWHLow molecular weight heparin 6-12 hours after surgery, OR
- Fondaparinux 6 hours after surgery
If the surgery is delayed beyond the day after admission → offer pre-operative thromboprophylaxis (LMWHLow molecular weight heparin or fondaparinux)
- LMWHLow molecular weight heparin last dose no less than 12 hours before surgery
- Fondaparinux last dose no less than 24 hours before surgery
If pharmacological prophylaxis is not appropriate → consider intermittent pneumatic compression.
LMWHLow molecular weight heparin is delayed 6-12 hours (or 6 hours if fondaparinux) after surgery to allow adequate surgical haemostasis and minimise bleeding / haematoma formation in the wound.
Elective Surgeries
Hip Replacement
Offer VTEVenous thromboembolism prophylaxis to ALL patients.
1st line:
- LMWHLow molecular weight heparin for 10 days followed by aspirin 75mg / 150mg for 28 days, OR
- LMWHLow molecular weight heparin for 28 days + anti-embolism stockings until discharge, OR
- Rivaroxaban 6-10 hours after surgery for 5 weeks
Although not specified by NICE, the BNF recommend starting LMWHLow molecular weight heparin 12-24 hours after surgery.
2nd line: apixaban or dabigatran
3rd line: anti-embolism stockings
Knee Replacement
Offer VTEVenous thromboembolism prophylaxis to ALL patients.
1st line:
- Aspirin 75mg / 150mg for 14 days, OR
- LMWHLow molecular weight heparin for 28 days + anti-embolism stockings until discharge, OR
- Rivaroxaban 6-10 hours after surgery for 5 weeks
Although not specified by NICE, the BNF recommend starting LMWHLow molecular weight heparin 12-24 hours after surgery.
2nd line: apixaban or dabigatran
3rd line: intermittent pneumatic compression
Arthroscopic Knee Surgery
VTEVenous thromboembolism prophylaxis is only indicated if:
- High risk of VTE, AND
- Total anaesthesia time >90 min
VTE prophylaxis of choice: LMWHLow molecular weight heparin 6-12 hours after surgery for 14 days
Foot and Ankle Orthopaedic Surgery
VTEVenous thromboembolism prophylaxis is generally not needed.
Consider VTEVenous thromboembolism prophylaxis if:
- Patient requires immobilisation, OR
- Total anaesthesia time >90 min, OR
- Patient's risk of VTEVenous thromboembolism outweighs risk of bleeding
Upper Limb Orthopaedic Surgery
VTEVenous thromboembolism prophylaxis is generally not needed.
Consider VTEVenous thromboembolism prophylaxis if:
- Patient requires immobilisation, OR
- Total anaesthesia time >90 min
Thromboprophylaxis in Renal Impairment Patients
NICE recommends choosing either LMWHLow molecular weight heparin or UFHUnfractionated heparin.
BNF treatment summary says that UFHUnfractionated heparin is the preferred thromboprophylaxis agent in renal impairment.
