Publications by authors named "Rui Terada"

Article Synopsis
  • Andexanet alfa is a medication used to reverse the effects of FXa inhibitors like apixaban, but its impact on blood clotting and fibrinolysis hasn't been thoroughly studied.
  • In experiments with plasma and blood from healthy volunteers, increasing levels of apixaban were shown to slow down thrombin generation and thrombus formation, while the addition of GDXa (a modified FXa analog) helped counteract these effects.
  • Results suggested that GDXa can effectively reverse coagulation delays caused by apixaban, but its effect on fibrinolysis was limited, indicating that FXa still plays a role in generating plasmin despite apixaban's inhibition at high concentrations.
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Surgical site infection (SSI) is an infrequent but costly complication after elective spine surgery. Identification of important temporal changes and predictive factors may inform targeted prevention efforts. A retrospective study of elective spine surgery patients was performed using the National Surgical Quality Improvement Programs (NSQIP) database from 2011 and 2019.

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A trace amount of thrombin cleaves factor VIII (FVIII) into an active form (FVIIIa), which catalyzes FIXa-mediated activation of FX on the activated platelet surface. FVIII rapidly binds to von Willebrand factor (VWF) after secretion and becomes highly concentrated via VWF-platelet interaction at a site of endothelial inflammation or injury. Circulating levels of FVIII and VWF are influenced by age, blood type (nontype O > type O), and metabolic syndromes.

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Background: Allogeneic blood transfusion used to be common in spine surgery. Patient blood management has been widely adopted, and it is important to reassess transfusion predictors in contemporary practice.

Methods: A retrospective study of inpatient spine surgery was performed using National Surgical Quality Improvement Program (NSQIP) data from 2011 to 2019.

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To estimate the effectiveness of high-dose intravenous (IV) iron supplementation for iron deficiency anemia after preoperative autologous blood donation (PAD), 155 donors who visited the donation office of the University of Tokyo Hospital from December 2020 to June 2021 and showed suspected post-donation anemia were analyzed. The participants were treated with high-dose intravenous (IV) iron supplementation (high-dose group, n = 30) or a combination of low-dose IV iron and oral iron supplementation (low-dose group, n = 125). The preoperative hemoglobin (Hb) and Hb decreasing ratios during PAD (ΔHb) were compared between the two groups.

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Background: Fluid resuscitation, which is critical to counter acute hemorrhagic shock, requires prompt and accurate intravascular volume estimation for optimal fluid administration. This study aimed to evaluate whether cardiac variation of internal jugular vein (IJV), evaluated by ultrasonography, could detect hypovolemic status and predict response to fluid resuscitation.

Methods: Patients undergoing autologous blood transfusion for elective surgery who were prospectively enrolled at the study blood donation center between August 2014 and January 2015.

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Background: It is widely accepted that Point-of Care Test (PoCT) devices are useful in the detection of coagulopathies in situations of massive bleeding such as major cardiac surgery. These devices contribute to the reduction of blood transfusion. However, their implementation remains limited in Japan because of their cost and lack of health insurance support.

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