Pathophysiology of Coagulopathy Induced by Traumatic Brain Injury Is Identical to That of Disseminated Intravascular Coagulation With Hyperfibrinolysis

Takeshi Wada, Atsushi Shiraishi, Satoshi Gando, Kazuma Yamakawa, Seitaro Fujishima, Daizoh Saitoh, Shigeki Kushimoto, Hiroshi Ogura, Toshikazu Abe, Toshihiko Mayumi, Junichi Sasaki, Joji Kotani, Naoshi Takeyama, Ryosuke Tsuruta, Kiyotsugu Takuma, Shin Ichiro Shiraishi, Yasukazu Shiino, Taka Aki Nakada, Kohji Okamoto, Yuichiro SakamotoAkiyoshi Hagiwara, Satoshi Fujimi, Yutaka Umemura, Yasuhiro Otomo

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Background: Traumatic brain injury (TBI)-associated coagulopathy is a widely recognized risk factor for secondary brain damage and contributes to poor clinical outcomes. Various theories, including disseminated intravascular coagulation (DIC), have been proposed regarding its pathomechanisms; no consensus has been reached thus far. This study aimed to elucidate the pathophysiology of TBI-induced coagulopathy by comparing coagulofibrinolytic changes in isolated TBI (iTBI) to those in non-TBI, to determine the associated factors, and identify the clinical significance of DIC diagnosis in patients with iTBI. Methods: This secondary multicenter, prospective study assessed patients with severe trauma. iTBI was defined as Abbreviated Injury Scale (AIS) scores ≥4 in the head and neck, and ≤2 in other body parts. Non-TBI was defined as AIS scores ≥4 in single body parts other than the head and neck, and the absence of AIS scores ≥3 in any other trauma-affected parts. Specific biomarkers for thrombin and plasmin generation, anticoagulation, and fibrinolysis inhibition were measured at the presentation to the emergency department (0 h) and 3 h after arrival. Results: We analyzed 34 iTBI and 40 non-TBI patients. Baseline characteristics, transfusion requirements and in-hospital mortality did not significantly differ between groups. The changes in coagulation/fibrinolysis-related biomarkers were similar. Lactate levels in the iTBI group positively correlated with DIC scores (rho = −0.441, p = 0.017), but not with blood pressure (rho = −0.098, p = 0.614). Multiple logistic regression analyses revealed that the injury severity score was an independent predictor of DIC development in patients with iTBI (odds ratio = 1.237, p = 0.018). Patients with iTBI were further subdivided into two groups: DIC (n = 15) and non-DIC (n = 19) groups. Marked thrombin and plasmin generation were observed in all patients with iTBI, especially those with DIC. Patients with iTBI and DIC had higher requirements for massive transfusion and emergency surgery, and higher in-hospital mortality than those without DIC. Furthermore, DIC development significantly correlated with poor hospital survival; DIC scores at 0 h were predictive of in-hospital mortality. Conclusions: Coagulofibrinolytic changes in iTBI and non-TBI patients were identical, and consistent with the pathophysiology of DIC. DIC diagnosis in the early phase of TBI is key in predicting the outcomes of severe TBI.

Original languageEnglish
Article number767637
JournalFrontiers in Medicine
Publication statusPublished - 2021 Nov 15


  • disseminated intravascular coagulation
  • fibrinolysis
  • shock
  • thrombin
  • trauma-induced coagulopathy
  • traumatic brain injury

ASJC Scopus subject areas

  • General Medicine


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