Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

207 questions · 224 findings · 22 reviews · Vascular

No studies found 42 · 18.8%GRADE not reported 21 · 9.4%Very low 33 · 14.7%Low 81 · 36.2%Moderate 35 · 15.6%High 12 · 5.4%

Low molecular weight heparin vs placebo or no prophylaxis

Deep vein thrombosis · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin probably leads to lower deep venous thrombosis compared with no prophylaxis or placebo (moderate certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Pulmonary embolism · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin showed no clear difference in pulmonary embolism compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Symptomatic venous thromboembolism · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin may leads to lower symptomatic venous thromboembolism compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Mortality due to other causes · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin showed no clear difference in mortality due to other causes compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Low molecular weight heparin vs placebo or no prophylaxis

Adverse outcomes · prevention of venous thromboembolism in patients with lower‐limb immobilization

Low molecular weight heparin showed no clear difference in adverse outcomes compared with no prophylaxis or placebo (low certainty).

1 finding from 1 review

Ultrasound‐assisted catheter‐directed thrombolysis plus standard intravenous heparinisation vs standard intravenous heparinisation

All‐cause mortality (90‐day) · people with intermediate‐risk (submassive) APE

It is very uncertain whether ultrasound‐assisted catheter‐directed thrombolysis plus standard… changes all‐cause mortality (90‐day) compared with standard intravenous heparinisation (very low certainty).

1 finding from 1 review

Ultrasound‐assisted catheter‐directed thrombolysis plus standard intravenous heparinisation vs standard intravenous heparinisation

Treatment‐associated minor haemorrhage ( · people with intermediate‐risk (submassive) APE

It is very uncertain whether ultrasound‐assisted catheter‐directed thrombolysis plus standard… changes treatment‐associated minor haemorrhage ( compared with standard intravenous heparinisation (very low certainty).

1 finding from 1 review

Ultrasound‐assisted catheter‐directed thrombolysis plus standard intravenous heparinisation vs standard intravenous heparinisation

Recurrent APE requiring retreatment or change to a different APE treatment ( · people with intermediate‐risk (submassive) APE
1 finding from 1 review

Low molecular weight heparin vs no LMWH

Incidence of compromised microcirculation requiring invasive intervention (re‐exploration) (analysed by digit, · patients undergoing digital replantation after traumatic amputation

It is very uncertain whether low molecular weight heparin (LMWH) changes incidence of compromised microcirculation requiring invasive… compared with no LMWH (very low certainty).

1 finding from 1 review