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ISSN 2097-3497 (Online)
CN 22-1108/R
Volume 37 Issue 7
Jul.  2021
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Article Navigation >  Journal of Clinical Hepatology  > 2021  >  37(7): 1582-1588

Role of thromboelastography in assessing the risk of spontaneous bleeding in patients with liver cirrhosis

DOI: 10.3969/j.issn.1001-5256.2021.07.021

  • Department of Blood Transfusion, Huadu People's Hospital, Guangzhou 510800, China

  • Received Date: 2020-11-30
  • Accepted Date: 2021-02-23
  • Published Date: 2021-07-20
    Abstract
  •   Objective  To investigate the association between thromboelastography (TEG) parameters and bleeding in patients with liver cirrhosis and whether TEG can be used to predict the risk of spontaneous bleeding in patients with liver cirrhosis, and to provide a basis for its preventive treatment.  Methods  A retrospective analysis was performed for the clinical data of 174 patients with liver cirrhosis who attended Huadu People's Hospital from May 2018 to April 2020 and did not receive invasive procedure, and according to the condition of bleeding, they were divided into non-bleeding group(n=64), gastrointestinal bleeding group(n=61), and mucocutaneous/oronasal bleeding group(n=49). The medical record system and laboratory information system were used to collect related information and laboratory test results for statistical analysis. The t-test was used for comparison of normally distributed continuous data between two groups; an analysis of variance was used for comparison between multiple groups, and the least significant difference t-test was used for further comparison between two groups. The Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups, and the Kruskal-Wallis H test was used for comparison between multiple groups. MedCalc software was used for receiver operating characteristic (ROC) curve analysis, and the area under the ROC curve (AUC) was calculated for commonly used coagulation markers and TEG parameters in predicting the risk of bleeding in patients with liver cirrhosis. Cut-off value, sensitivity, specificity, positive predictive value, and negative predictive value were determined, and the Z test was used for comparison of indices in predicting mucocutaneous/oronasal bleeding.  Results  Of all 174 patients, 110 (63.2%) experienced spontaneous bleeding, among whom 61 (55.5%) had gastrointestinal bleeding and 49 (44.5%) had mucocutaneous/oronasal bleeding. There were significant differences in maximum amplitude (MA) and K between the bleeding group and the non-bleeding group (t=2.241 and -2.605, both P < 0.05). There were significant differences between the mucocutaneous/oronasal bleeding group and the non-bleeding/gastrointestinal bleeding groups in platelet count (PLT) and the TEG parameters of clot formation time, a-angle, MA, and coagulation index (CI) (F=3.947, H=12.867, F=4.007, F=8.498, F=5.420, all P < 0.05). Among the TEG parameters, reaction time and Lys30 were generally within the normal range, while there was a prolonged kinetics (K) time and reductions in a-angle, MA, and CI. PLT ≤40×109/L, MA ≤35.7 mm, K time > 4.2 minutes, a-angle ≤51.6, and CI ≤-5.9 could be used to predict spontaneous mucocutaneous/oronasal bleeding in patients with liver cirrhosis (all AUC > 0.7), with positive predictive values of 82.4, 88.9, 81.0, 72.7, and 73.7, respectively, and negative predictive values of 68.3, 72.5, 73.0, 69.4, and 66.7, respectively.  Conclusion  PLT and the TEG parameters of K time, a-angle, MA, and CI can predict spontaneous bleeding caused by abnormal coagulation in liver cirrhosis, while conventional coagulation parameters prothrombin time and activated partial thromboplastin time cannot predict such bleeding, which provides a basis for the treatment of coagulation disorder and transfusion of blood components for patients with liver cirrhosis.

     

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