The TransAtlantic Inter-Society Consensus (TASC) developed criteria for classification of acute limb ischemia in a patient with peripheral arterial disease (PAD). This can help guide patient management. This is a modification of the SVS/ISCVS reporting standards.
Parameters:
(1) sensory loss
(2) muscle weakness
(3) audible arterial Doppler sounds
(4) audible venous Doppler sounds
Sensory Loss
Muscle/Motor Weakness
Arterial Doppler
Venous Doppler
Category
none
none
audible
audible
viable
none or over digits
none
often inaudible
audible
threatened, marginally
more than digit; rest pain present
mild to moderate
usually inaudible
audible
threatened, immediately
profound anesthesia
profound with paralysis and/or rigor
inaudible
inaudible
irreversible
where:
• The original table used "toes" for sensory loss.
Category
Prognosis
viable
not immediately threatened
threatened, marginally
salvageable if treated promptly
threatened, immediately
salvage if treated immediately with revascularization
irreversible
inevitable loss of major tissue and/or permanent nerve damage
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