Normal is <10 mm Hg<unk> s <20 mmHg can be tolerated w/o significant damage
Exact level of<unk>  elevation that causes cell death is unclear.  It was previously thought<unk>  >30 mmHg was toxic although the "delta<unk> " may be better predictor than absolute<unk> <unk>  = [Diastolic<unk> ] –<unk><unk> ]<unk>  < 30 mm Hg  is suggestive of<unk>  syndrome
Compartment pressure measurement
Capnography
Ankle-brachial index
Age adjusted D-dimer
NIH Stroke Scale
Bubble study
Modified Wells Score
Thromboelastography 