Influencing factors of the TEG maximum amplitude reduction in emergency trauma patients / 中国输血杂志

【Objective】 To investigate the causes of abnormal decrease in maximum amplitude(MA) of thromboelastography(TEG) and its effect on prognosis by monitoring the changes of coagulation-related indexes in emergency trauma patients. 【Methods】 A total of 319 cases of trauma patients admitted to our hospital from September 2020 to September 2023 were retrospectively analyzed, and the coagulation-related indexes of 0 h and 24 h after admission were observed. According to the MA results, they were divided into normal MA group(>50 mm) and reduced MA group(≤50 mm) to compare the hemoglobin(Hb), platelets count(Plt), activated partial thromboplastin time(APTT), prothrombin time(PT), fibrinogen(Fib), thrombin time(TT), D-dimer(D-D), coagulation reaction time(R), clot formation kinetics(Angle), 30 min clot dissolution rate(Ly30), MA, thrombine-antithrombin complex(TAT) and plasminase-α2 plasminase inhibitor complex(PIC). The correlation between MA and fibrinolysis indexes in 319 trauma patients was analyzed. According to whether tranexamic acid(TXA) was used, the reduced MA group was divided into a TXA group and a non-drug group. The differences in the change of the above coagulation-related indexes, mortality rate and changes in blood product dosage were compared between the two groups. 【Results】 Compared with the normal MA group, Hb, Plt, Fib, diastolic blood pressure and GCS scores decreased, while heart rate, ISS score and mortality increased significantly in the reduced MA group(P0.05). The mortality rate in the TXA group was reduced significantly(P<0.05). 【Conclusion】 Hyperfibrinolysis may be an important factor in the abnormal decrease of MA in emergency trauma patients. Treatment with TXA can improve its effect on MA, and reduce the transfusion of blood products and the patient mortality.

Effect of mineral trioxide aggregate on proliferation and differentiation of rat dental papilla cells / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the effects of mineral trioxide aggregate(MTA) on the proliferation and differentiation of rat dental papilla cells(RDPC).</p><p><b>METHODS</b>RDPC were cultured by tissue block method and identified.RDPC of the third passage were cultured with material extract fluid containing different mass concentrations of MTA (0.002, 0.02,0.2, 2 and 20 g/L) for 3 d, those cultured with routine culture fluid served as control group. The proliferation-related parameters were measured by methyl thiazolyl tetrazolium(MTT) assay. RDPC were cultured with material extract fluids containing 0.002 g/L MTA, those cultured with routine culture fluid served as control group, the activity of alkaline phosphatase(ALP) at 1, 3,5, 7 d and the level of collagen I at 1, 3,5 d were detected.</p><p><b>RESULTS</b>MTT results showed that the A value of RDPC of group 20 g/L (0.092 ± 0.011) was less than that of the control group (0.249 ± 0.006) at 3 d(P < 0.01), the A value of RDPC of group 0.02 g/L (0.267 ± 0.005) and 0.002 g/L (0.276 ± 0.006) were more than that of the control group (0.249 ± 0.006) at 3 d(P < 0.01). ALP detection proved that ALP activity of MTA at 3 d (0.217 ± 0.008), 5 d (0.253 ± 0.005) , 7 d (0.279 ± 0.004) were more than that of the control group at 3 d (0.166 ± 0.006) ,5 d (0.221 ± 0.006), 7 d (0.242 ± 0.004) (P < 0.01). Collagen I detection showed that the level of collagen I of MTA at 3 d[(78.46 ± 2.72) µg/L], 5 d[(90.73 ± 3.08) µg/L] were more than that of the control group at 3 d[ (66.75 ± 3.08) µg/L], [5 d (74.27 ± 3.50) µg/L] (P < 0.01).</p><p><b>CONCLUSIONS</b>MTA of high concentrations can significantly inhibit cell growth, and of low concentrations can promote cells proliferation and differentiation.</p>

Effect of daidzein on antiarrhythmia / 中国中药杂志

<p><b>OBJECTIVE</b>To study the effect of Daidzein on Antiarrhythmia.</p><p><b>METHOD</b>The conventional antiarrhythmia methods were used.</p><p><b>RESULT</b>Daidzein was remarkedly effective in preventing ventricular fibrillation induced by chloroform in mice and arrhythmia induced by aconitine in rats. The arrhythmia induced by adrenalin in rabbits was antagonized by Daidzein and it could obviously inhibit the action potential amplitude of isolated sciatic nerves in toads. And it could also prevent ventricular fibrillation induced by calcium chloride in rats, and obviously reduce the death rate of rats. Its anti-arrhythmic effect was dose-dependent.</p><p><b>CONCLUSION</b>Daidzein has obvious protective effect on drug-induced arrhythmia, which may be related to its inhibition of Na+ or Ca2+ influx and its blocking beta-adrenergic receptor.</p>