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| 1 | Analysis of Risk Factors of Postoperative Neurological Complications in Patients with Stanford Type A Aortic Dissection Undergoing Sun’s Procedure显示文摘Objective:This study analyzed the risk factors of neurological complications in patients with Stanford type A aortic dissection after Sun’s procedure in a single-center with the purpose of improving the effects.Methods:From January 2019 to December 2020,the clinical data of 480 patients with Stanford type A aortic dissection,who were treated by Sun’s procedure in our center were retrospectively analyzed.Univariate and multivariate logistic regression analyses were used to determine the risk factors of postoperative neurological complications.According to whether there were neurological complications after surgery,they were divided into two groups:the group with complications(n=70)and the group without complications(n=410).The clinical data of the two groups were collected and compared.Results:There were 70 cases of patients with postoperative neurological complications in 480 cases.The incidence rates of temporary neurological dysfunction(TND)and permanent neurological dysfunction(PND)was 11.5%(55/480)and 3.1%(15/480),respectively.Univariate analysis showed that the age(≥70 years),stroke history,femoral artery intubation and cardiopulmonary bypass(CPB)time were associated with postoperative PND(p<0.05).Renal dysfunction,emergency surgery,postoperative hypernatremia,postoperative hyperglycemia,postoperative hypoxemia,postoperative low cardiac output syndrome,and assisted time of suction influenced the occurrence of postoperative TND(p<0.05).Multivariate logistic regression analysis showed that age(≥70 years),stroke history,femoral artery intubation and CPB time were independent risk factors for PND.Renal dysfunction,emergency surgery,postoperative hypernatremia,postoperative hyperglycemia,postoperative hypoxemia,postoperative low cardiac output syndrome,and aspiration time were independent risk factors for TND.Compared with the two groups,the hospitalization time and ICU time of the patients in the neurological complications group were significantly prolonged,and the mortality rate was significantly increased(p<0.05).Conclusion:There are many risk factors for neurological complications in patients with Stanford type A aortic dissection after surgery.With the improvement of surgical techniques,optimization of cerebral perfusion,and interventions for risk factors,Sun’s procedure remains the preferred treatment for Stanford type A aortic dissection. | Hui Zhang Ruicheng Zhang Hua Zhang Feng Li Jianming Zhao Shen Ma Rujun Zhu Pingfan Wang | 2021 | Journal of Clinical and Nursing Research2021，5，6： | 0 |
| 2 | Mechanism of ball milled activated carbon in improving the desalination performance of flow-and fixed-electrode in capacitive deionization desalination显示文摘Capacitive deionization(CDI)is a novel electrochemical water-treatment technology.The electrode material is an important factor in determining the ion separation efficiency.Activated carbon(AC)is extensively used as an electrode material;however,there are still many deficiencies in commercial AC.We adopted a simple processing method,ball milling,to produce ball milled AC(BAC)to improve the physical and electrochemical properties of the original AC and desalination efficiency.The BAC was characterized in detail and used for membrane capacitive deionization(MCDI)and flow-electrode capacitive deionization(FCDI)electrode materials.After ball milling,the BAC obtained excellent pore structures and favorable surfaces for ion adsorption,which reduced electron transfer resistance and ion migration resistance in the electrodes.The optimal ball-milling time was 10 h.However,the improved effects of BAC as fixed electrodes and flow electrodes are different and the related mechanisms are discussed in detail.The average salt adsorption rates(ASAR)of FCDI and MCDI were improved by 134%and 17%,respectively,and the energy-normalized removal salt(ENRS)were enhanced by 21%and 53%,respectively.We believe that simple,low-cost,and environmentally friendly BAC has great potential for practical engineering applications of FCDI and MCDI. | Ge Shen Junjun Ma Jianrui Niu Ruina Zhang Jing Zhang Xiaoju Wang Jie Liu Jiarong Gu Ruicheng Chen Xiqing Li Chun Liu | 2023 | Frontiers of Environmental Science & Engineering2023，17，5： | 0 |
| 3 | Mechanical behavior analysis of high power commercial lithium-ion batteries显示文摘In application,lithium-ion cells undergo expansion during cycling.The mechanical behavior and the impact of external stress on lithium-ion battery are important in vehicle application.In this work,18 Ah high power commercial cell with Li Ni_(0.5)Co_(0.2)Mn_(0.3)O_(2)/graphite electrode were adopted.A commercial compress machine was applied to monitor the mechanical characteristics under different stage of charge(SOC),lifetime and initial external force.The dynamic and steady force was obtained and the results show that the dynamic force increases as the SOC increasing,obviously.During the lifetime with high power driving mode,different external force is shown to have a great impact on the long-term cell performance,with higher stresses result in higher capacity decay rates and faster impedance increases.A proper initial external force(900 N)provides lower impedance increasing.Postmortem analysis of the cells with2000 N initial force suggests a close correlation between electrochemistry and mechanics in which higher initial force leads to higher direct current internal resistance(DCIR)increase rate.In addition,for the cell with higher external force,deformation of the cathode and thicker solid electrolyte interface(SEI)film on the surface of anode and separator are observed.Porosity reduction and closure was also verified after cycles which is an obstacle to the lithium ion transferring.The largest cause of the observed capacity decline was the loss of active lithium through autopsy analysis.In addition,for the cell with higher external force,deformation of the cathode and thicker SEI film on the surface of anode and separator are observed.Porosity reduction and closure was also verified after cycles which is an obstacle to the lithium ion transferring.The largest cause of the observed capacity decline was the loss of active lithium through autopsy analysis. | Ruicheng Shen Shaojun Niu Guobin Zhu Kai Wu Honghe Zheng | 2023 | Chinese Journal of Chemical Engineering2023，58，6： | 0 |
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