Standard TEG tracing. Standard TEG tracing. R time is reflective of enzyme/coagulation factor deficiency. α Angle is reflective of the thrombin burst. Maximal amplitude (MA) consists of 80% of platelet activity and 20% of fibrinogen. TEG, thrombelastography-platelet mapping. Louise Y Y Yeung et al. Trauma Surg Acute Care Open 2016;1:e000022 Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/