should be performed within 5cm of fracture site
anterior<unk> 
entry point: 1 cm lateral to anterior border of tibia
needle should be perpendicular to skin
deep posterior<unk> 
entry point: just posterior to the medial border of tibia
advance needle perpendicular to skin towards fibula
lateral<unk> 
entry point: just anterior to the posterior border of fibula
superficial posterior
entry point: middle of calf
entry point: 1 cm lateral to anterior border of tibia
needle should be perpendicular to skin
entry point: just posterior to the medial border of tibia
advance needle perpendicular to skin towards fibula
entry point: just anterior to the posterior border of fibula
entry point: middle of calf
Compartment pressure measurement
Capnography
Ankle-brachial index
Age adjusted D-dimer
NIH Stroke Scale
Bubble study
Modified Wells Score
Thromboelastography 