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. Author manuscript; available in PMC: 2023 May 1.
Published in final edited form as: J Trauma Acute Care Surg. 2022 Jan 25;92(5):839–847. doi: 10.1097/TA.0000000000003551

Table 4.

Arrival Laboratory Measurements of Hemostasis

Standard Care N=46 LTOWB N=40 p-value
Arrival PT, median (IQR) 15.8 (15, 18) 15.6 (14, 16) 0.13
Arrival INR, median (IQR) 1.3 (1.2, 1.4) 1.2 (1.1, 1.3) 0.08
Acute Traumatic Coagulopathy: 6 hour INR > 1.4 (%) 22.9% 6.9% 0.07
Rapid Thromboelastography Measurements
 Activated Clotting Time-seconds 113 (105, 123) 121 (105, 121) 0.88
 K-time-minutes 1.5 (1.1, 2.4) 1.3 (1.2, 1.8) 0.41
 Alpha-angle-degrees 72.6 (67, 75) 73.1 (69, 77) 0.51
 Maximal Amplitude-mm 62.2 (53, 67) 62.3 (58, 67) 0.58
 LY30-% 1.0 (0.6, 2.2) 0.7 (0.3, 1.6) 0.44
Abnormal (coagulopathic) Rapid Thromboelastography Measurements
Activated Clotting Time > 128 seconds (%) 22.7% 21.7% 0.93
K-time > 2.5 minutes (%) 17.4% 0.0% 0.04*
Alpha-angle < 60° (%) 14.8% 3.8% 0.17
Maximal Amplitude < 55mm (%) 25.0% 4.6% 0.04*
LY30 > 3.0 percent (%) 6.7% 5.6% 0.89

Unavailable in 22 patients, 11 from each arm;

††

Unavailable in 32 patients, 18 from Standard Care and 14 from LTOWB