Objective: through the investigation of blood transfusion treatment in hospital, the factors causing adverse reactions were analyzed, and the preventive measures were put forward. Methods: To investigate the clinical ...Objective: through the investigation of blood transfusion treatment in hospital, the factors causing adverse reactions were analyzed, and the preventive measures were put forward. Methods: To investigate the clinical data of the patients treated in the department of blood transfusion in our hospital, and select 2180 blood transfusion patients from March 2020 to April 2022 for observation. The proportion of patients with adverse reactions was counted, and the differences of adverse reactions caused by different blood transfusion types were analyzed, and the types of adverse reactions and the influence of different factors on the incidence were discussed. Results: among the 2180 patients who received blood transfusion, 7 patients had adverse blood transfusion reactions, accounting for 0.32% of the total. The incidence of adverse reactions caused by transfusion of different blood types from high to low is virus inactivated plasma 3 times (0.94%), leucocyte-removed platelet collection 2 times (0.4%), leucocyte-removed suspended red blood cell 1 time (0.19%), leucocyte-removed cold precipitation 1 time (0.14%) and leucocyte-removed red blood cell washing 0 times (0%). The types and proportions of adverse reactions of blood transfusion from high to low were allergic reaction 4 times (57.14%), fever reaction 2 times (28.57%), acute lung injury related to blood transfusion 1 time (14.29%) and hemolysis reaction 0 times (0%). The main factors affecting the incidence of adverse blood transfusion reactions are pregnancy history, blood transfusion history and blood transfusion volume over 1600mL. Patients with three factors in the past have a higher probability of adverse blood transfusion reactions, and the difference is typical compared with the control variables (P < 0.05). Conclusion: there are many risks of adverse reactions in clinical blood transfusion. For patients who need blood transfusion, we should strictly control the inducement of adverse reactions in blood transfusion, be alert to the treatment process of virus-inactivated plasma transfusion, and prevent allergic blood transfusion reactions in time. For patients with previous pregnancy history, blood transfusion history and blood transfusion volume over 1600mL, we should strengthen measures to prevent adverse reactions in blood transfusion, improve the safety of blood transfusion treatment and ensure the life and health of patients.展开更多
以动力澎湃的超越1000mL级V型双缸发动机为平台,KTM已经推出了1290 SUPER ADVENTURE和1290 SUPER ADVENTURE R,在大型探险车领域纵横捭阖、叱咤风云。现在,KTM进一步强化越野血统,注入技术基因,让操控变得更犀利、发动机更轻巧、智能装...以动力澎湃的超越1000mL级V型双缸发动机为平台,KTM已经推出了1290 SUPER ADVENTURE和1290 SUPER ADVENTURE R,在大型探险车领域纵横捭阖、叱咤风云。现在,KTM进一步强化越野血统,注入技术基因,让操控变得更犀利、发动机更轻巧、智能装置更先进,在保持舒适安全的前提下,进化得更运动、更富激情,这就是新一代1290 SUPER ADVENTURE S!展开更多
In this study,the flow characteristics around a group of three piers arranged in tandem were investigated both numerically and experimentally.The simulation utilised the volume of fluid(VOF)model in conjunction with t...In this study,the flow characteristics around a group of three piers arranged in tandem were investigated both numerically and experimentally.The simulation utilised the volume of fluid(VOF)model in conjunction with the k–ɛmethod(i.e.,for flow turbulence representations),implemented through the ANSYS FLUENT software,to model the free-surface flow.The simulation results were validated against laboratory measurements obtained using an acoustic Doppler velocimeter.The comparative analysis revealed discrepancies between the simulated and measured maximum velocities within the investigated flow field.However,the numerical results demonstrated a distinct vortex-induced flow pattern following the first pier and throughout the vicinity of the entire pier group,which aligned reasonably well with experimental data.In the heavily narrowed spaces between the piers,simulated velocity profiles were overestimated in the free-surface region and underestimated in the areas near the bed to the mid-stream when compared to measurements.These discrepancies diminished away from the regions with intense vortices,indicating that the employed model was capable of simulating relatively less disturbed flow turbulence.Furthermore,velocity results from both simulations and measurements were compared based on velocity distributions at three different depth ratios(0.15,0.40,and 0.62)to assess vortex characteristic around the piers.This comparison revealed consistent results between experimental and simulated data.This research contributes to a deeper understanding of flow dynamics around complex interactive pier systems,which is critical for designing stable and sustainable hydraulic structures.Furthermore,the insights gained from this study provide valuable information for engineers aiming to develop effective strategies for controlling scour and minimizing destructive vortex effects,thereby guiding the design and maintenance of sustainable infrastructure.展开更多
文摘Objective: through the investigation of blood transfusion treatment in hospital, the factors causing adverse reactions were analyzed, and the preventive measures were put forward. Methods: To investigate the clinical data of the patients treated in the department of blood transfusion in our hospital, and select 2180 blood transfusion patients from March 2020 to April 2022 for observation. The proportion of patients with adverse reactions was counted, and the differences of adverse reactions caused by different blood transfusion types were analyzed, and the types of adverse reactions and the influence of different factors on the incidence were discussed. Results: among the 2180 patients who received blood transfusion, 7 patients had adverse blood transfusion reactions, accounting for 0.32% of the total. The incidence of adverse reactions caused by transfusion of different blood types from high to low is virus inactivated plasma 3 times (0.94%), leucocyte-removed platelet collection 2 times (0.4%), leucocyte-removed suspended red blood cell 1 time (0.19%), leucocyte-removed cold precipitation 1 time (0.14%) and leucocyte-removed red blood cell washing 0 times (0%). The types and proportions of adverse reactions of blood transfusion from high to low were allergic reaction 4 times (57.14%), fever reaction 2 times (28.57%), acute lung injury related to blood transfusion 1 time (14.29%) and hemolysis reaction 0 times (0%). The main factors affecting the incidence of adverse blood transfusion reactions are pregnancy history, blood transfusion history and blood transfusion volume over 1600mL. Patients with three factors in the past have a higher probability of adverse blood transfusion reactions, and the difference is typical compared with the control variables (P < 0.05). Conclusion: there are many risks of adverse reactions in clinical blood transfusion. For patients who need blood transfusion, we should strictly control the inducement of adverse reactions in blood transfusion, be alert to the treatment process of virus-inactivated plasma transfusion, and prevent allergic blood transfusion reactions in time. For patients with previous pregnancy history, blood transfusion history and blood transfusion volume over 1600mL, we should strengthen measures to prevent adverse reactions in blood transfusion, improve the safety of blood transfusion treatment and ensure the life and health of patients.
文摘以动力澎湃的超越1000mL级V型双缸发动机为平台,KTM已经推出了1290 SUPER ADVENTURE和1290 SUPER ADVENTURE R,在大型探险车领域纵横捭阖、叱咤风云。现在,KTM进一步强化越野血统,注入技术基因,让操控变得更犀利、发动机更轻巧、智能装置更先进,在保持舒适安全的前提下,进化得更运动、更富激情,这就是新一代1290 SUPER ADVENTURE S!
文摘In this study,the flow characteristics around a group of three piers arranged in tandem were investigated both numerically and experimentally.The simulation utilised the volume of fluid(VOF)model in conjunction with the k–ɛmethod(i.e.,for flow turbulence representations),implemented through the ANSYS FLUENT software,to model the free-surface flow.The simulation results were validated against laboratory measurements obtained using an acoustic Doppler velocimeter.The comparative analysis revealed discrepancies between the simulated and measured maximum velocities within the investigated flow field.However,the numerical results demonstrated a distinct vortex-induced flow pattern following the first pier and throughout the vicinity of the entire pier group,which aligned reasonably well with experimental data.In the heavily narrowed spaces between the piers,simulated velocity profiles were overestimated in the free-surface region and underestimated in the areas near the bed to the mid-stream when compared to measurements.These discrepancies diminished away from the regions with intense vortices,indicating that the employed model was capable of simulating relatively less disturbed flow turbulence.Furthermore,velocity results from both simulations and measurements were compared based on velocity distributions at three different depth ratios(0.15,0.40,and 0.62)to assess vortex characteristic around the piers.This comparison revealed consistent results between experimental and simulated data.This research contributes to a deeper understanding of flow dynamics around complex interactive pier systems,which is critical for designing stable and sustainable hydraulic structures.Furthermore,the insights gained from this study provide valuable information for engineers aiming to develop effective strategies for controlling scour and minimizing destructive vortex effects,thereby guiding the design and maintenance of sustainable infrastructure.
