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Effect of continuous nursing on rehabilitation of older patients with joint replacement after discharge
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作者 Xiao-Yan Qi Hong-Yan Zhou Yu-Hong Xing 《World Journal of Clinical Cases》 SCIE 2024年第21期4558-4565,共8页
BACKGROUND Joint replacement is a common treatment for older patients with high incidences of hip joint diseases.However,postoperative recovery is slow and complications are common,which reduces surgical effectiveness... BACKGROUND Joint replacement is a common treatment for older patients with high incidences of hip joint diseases.However,postoperative recovery is slow and complications are common,which reduces surgical effectiveness.Therefore,patients require long-term,high-quality,and effective nursing interventions to promote rehabilitation.Continuity of care has been used successfully in other diseases;however,little research has been conducted on older patients who have undergone hip replacement.AIM To explore the clinical effect of continuous nursing on rehabilitation after discharge of older individuals who have undergone joint replacement.METHODS A retrospective analysis was performed on the clinical data of 113 elderly patients.Patients receiving routine nursing were included in the convention group(n=60),and those receiving continuous nursing,according to various methods,were included in the continuation group(n=53).Harris score,short form 36(SF-36)score,complication rate,and readmission rate were compared between the convention and continuation groups.RESULTS After discharge,Harris and SF-36 scores of the continuation group were higher than those of the convention group.The Harris and SF-36 scores of the two groups showed an increasing trend with time,and there was an interaction effect between group and time(Harris score:F_(intergroup effect)=376.500,F_(time effect)=20.090,Finteraction effect=4.824;SF-36 score:F_(intergroup effect)=236.200,Ftime effect=16.710,Finteraction effect=5.584;all P<0.05).Furthermore,the total complication and readmission rates in the continuation group were lower(P<0.05).CONCLUSION Continuous nursing could significantly improve hip function and quality of life in older patients after joint replacement and reduce the incidence of complications and readmission rates. 展开更多
关键词 continuous nursing DISCHARGE Older adults Joint replacement REHABILITATION effect
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Personalized and continuous care intervention affects rehabilitation,living quality,and negative emotions of patients with breast cancer
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作者 Ling-Xia Kong Yan-Hong Zhao +1 位作者 Zhi-Lin Feng Ting-Ting Liu 《World Journal of Psychiatry》 SCIE 2024年第6期876-883,共8页
BACKGROUND Breast cancer is among the most common malignancies worldwide.With progress in treatment methods and levels,the overall survival period has been prolonged,and the demand for quality care has increased.AIM T... BACKGROUND Breast cancer is among the most common malignancies worldwide.With progress in treatment methods and levels,the overall survival period has been prolonged,and the demand for quality care has increased.AIM To investigate the effect of individualized and continuous care intervention in patients with breast cancer.METHODS Two hundred patients with breast cancer who received systemic therapy at The First Affiliated Hospital of Hebei North University(January 2021 to July 2023)were retrospectively selected as research participants.Among them,134 received routine care intervention(routing group)and 66 received personalized and continuous care(intervention group).Self-rating anxiety scale(SAS),self-rating depression scale(SDS),and Functional Assessment of Cancer Therapy-Breast(FACT-B)scores,including limb shoulder joint activity,complication rate,and care satisfaction,were compared between both groups after care.RESULTS SAS and SDS scores were lower in the intervention group than in the routing group at one and three months after care.The total FACT-B scores and five dimensions in the intervention group were higher than those in the routing group at three months of care.The range of motion of shoulder anteflexion,posterior extension,abduction,internal rotation,and external rotation in the intervention group was higher than that in the routing group one month after care.The incidence of postoperative complications was 18.18%lower in the intervention group than in the routing group(34.33%;P<0.05).Satisfaction with care was 90.91% higher in the intervention group than in the routing group(78.36%;P<0.05).CONCLUSION Personalized and continuous care can alleviate negative emotions in patients with breast cancer,quicken rehabilitation of limb function,decrease the incidence of complications,and improve living quality and care satisfaction. 展开更多
关键词 Breast cancer Personalized care continuous care Negative emotions Living quality Rehabilitation effect
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Suppression of transmembrane sodium currents on the freshly isolated hippocampal neuron cell with continuous infrared light
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作者 Fanyi Kong Xinyu Li +4 位作者 Ruonan Jiao Kun Liu Xue Han Changkai Sun Changsen Sun 《Journal of Innovative Optical Health Sciences》 SCIE EI CAS CSCD 2023年第2期16-27,共12页
Physiotherapeutic effects of infrared lasers have been proved in clinic.These infrared-based regulations of the bioelectrical activities can roughly be classied into enhancement and suppression of action potential(AP)... Physiotherapeutic effects of infrared lasers have been proved in clinic.These infrared-based regulations of the bioelectrical activities can roughly be classied into enhancement and suppression of action potential(AP),which are described by sodium(Na)and potassium(K)transmembrane current equations,named as Hodgkin and Huxley(HH)-model.The enhancement effect is able to evoke or strengthen the AP when infrared light is applied.Its corresponding mechanism is commonly ascribed to the changes of the cell membrane capacitance,which is transiently increased in response to the infrared radiation.The distinctive feature of the suppression effect is to inhibit or reduce the AP by the designed protocols of infrared radiation.However,its mechanism presents more complexity than that in enhancement cases.HH-model describes how the Na current determines the initial phase of AP.So,the enhancement and suppression of AP can be also ascribed to the regulations of the corresponding Na currents.Here,a continuous infrared light at the wavelength of 980 nm(CIS-980)was employed to stimulate a freshly isolated hippocampal neuron in vitro and a suppression effect on the Na currents of the neuron cell was observed.Both Na and K currents,which are named as whole cell currents,were simultaneously recorded with the cell membrane capacitance current by using a patch clamp combined with infrared irradiation.The results demonstrated that the CIS-980 was able to reversibly increase the capacitance currents,completely suppressed Na currents,but little changed K currents,which forms the steady outward whole cell currents and plays a major role on the AP repolarization.A conrmation experiment was designed and carried out by synchronizing tens of milliseconds of infrared stimulation on the same kinds of hippocampal neuron cells.After the blocked K channel,a reduction of Na current amplitude was still recorded.This proved that infrared suppression of Na current was irrelevant to K channel.A membrane capacitance mediation process was preliminarily proposed to explain the Na channel suppression process. 展开更多
关键词 Na channel suppression AP whole cell currents infrared suppression of bioelectrical activity photothermal effect on the membrane capacitance continuous infrared laser physiotherapy
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Modified Sadowski formula-based model for the slope shape amplification effect under multistage slope blasting vibration
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作者 Xiaogang Wu Mingyang Wang +2 位作者 Hao Lu Yongjun Zhang Wen Nie 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第5期631-641,共11页
Blasting operations,which are crucial to open-pit mine production due to their simplicity and efficiency,require precise control through accurate vibration velocity calculations.The conventional Sadowski formula mainl... Blasting operations,which are crucial to open-pit mine production due to their simplicity and efficiency,require precise control through accurate vibration velocity calculations.The conventional Sadowski formula mainly focuses on blast center distance but neglects the amplification effect of blasting vibration waves by terraced terrain,from which the calculated blasting vibration velocities are smaller than the actual values,affecting the safety of the project.To address this issue,our model introduces the influences of slope and time into Sadowski formula to measure safety through blast vibration displacement.In the northern section of the open-pit quartz mine in Jinchang City,Gansu Province,China,the data of a continuous blasting slope project are referred to.Our findings reveal a noticeable vibration amplification effect during blasting when a multi-stage slope platform undergoes a sudden cross-sectional change near the upper overhanging surface.The amplification vibration coefficient increases with height,while vibration waves within rocks decrease from bottom to top.Conversely,platforms without distinct crosssectional changes exhibit no pronounced amplification during blasting.In addition,the vibration intensity decreases with distance as the rock height difference change propagates.The results obtained by the proposed blast vibration displacement equation incorporating slope shape influence closely agree with real-world scenarios.According to Pearson correlation coefficient(PPMCC)analysis,the average accuracy rate of our model is 88.84%,which exceeds the conventional Sadowski formula(46.92%). 展开更多
关键词 Multistage slope Slope shape influence factor continuous blasting Sadowski formula Amplification effect
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PIECEWISE CONTINUOUS SOLUTIONS OF INITIAL VALUE PROBLEMS OF SINGULAR FRACTIONAL DIFFERENTIAL EQUATIONS WITH IMPULSE EFFECTS
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作者 刘玉记 《Acta Mathematica Scientia》 SCIE CSCD 2016年第5期1492-1508,共17页
Results on the existence of piecewise continuous solutions for two classes of initial value problems of impulsive singular fractional differential equations are obtained.
关键词 singular fractional differential equation impulsive effect piecewise continuous solution fixed point theorem
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Effect of Continuous Nursing Model on Nursing Effect of Continuous Peritoneal Dialysis 被引量:1
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作者 Yaqin Zhou 《Journal of Clinical and Nursing Research》 2021年第6期125-129,共5页
Objective:To analyze and study the effect of continuous nursing mode for continuous peritoneal dialysis nursing.Methods:40 patients with continuous peritoneal dialysis received in our hospital were randomly selected a... Objective:To analyze and study the effect of continuous nursing mode for continuous peritoneal dialysis nursing.Methods:40 patients with continuous peritoneal dialysis received in our hospital were randomly selected as the research object.The research time was from June 2018 to June 2020.The patients were divided into two groups by random number table method.The patients with routine nursing mode were named as the control group and the patients with continuous nursing mode were named as the observation group(20 cases in each group).The clinical nursing effects of different nursing modes are compared.Results:After nursing,the nursing compliance of the observation group was 95%,which was higher than 70% of the control group.There was significant difference between the two groups(P<0.05).Comparing the blood routine related indexes of the two groups,the blood potassium,hemoglobin,serum creatinine and carbon dioxide binding force of the observation group were better than those of the control group(P<0.05).The incidence of peritonitis and rehospitalization rate in half a year in the observation group were lower than those in the control group(P<0.05).Conclusion:The continuous nursing model for patients undergoing continuous peritoneal dialysis can improve the treatment effect of patients,significantly improve the compliance of patients,significantly improve the serological indexes,promote the health of patients,reduce the incidence of peritonitis,and significantly reduce the rehospitalization rate in half a year.It has a broad prospect of clinical promotion. 展开更多
关键词 continuous nursing model continuous peritoneal dialysis Clinical effect
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Effects of Tube Depth and Infusion Rate of Continuous Humidification by Endotracheal Intubation on Humidification Effect
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作者 Hui Sun Dan Li +1 位作者 Wan Luo Lin Feng 《Open Journal of Nursing》 2017年第1期123-127,共5页
Objective: To investigate the continuous humidification tube insertion depth of endotracheal intubation and the flow rate of the wetting effect. Methods: From October 2008 to May 2010, among 132 patients of oral and m... Objective: To investigate the continuous humidification tube insertion depth of endotracheal intubation and the flow rate of the wetting effect. Methods: From October 2008 to May 2010, among 132 patients of oral and maxillofacial surgery with tracheal intubation, continuous infusion can be adjusted to the wet method;according to the wet pipe, insertion depth of the flow rate is divided into four groups, by four different depths and velocities of the wetting effect, to be analyzed. Results: B group was significantly lower than other groups satisfied with indicators of four significantly different effects of humidification. Conclusion: When continuous humidification tube insertion depth of endotracheal intubation is 10 - 12 cm, and flow rate is 15 - 20 ml/h, the wetting effect will achieve greater satisfaction. 展开更多
关键词 INTUBATION continuous HUMIDIFICATION TUBE DEPTH INFUSION Rate HUMIDIFICATION effect
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Analysis of atmospheric effects on the continuous variable quantum key distribution
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作者 Tao Liu Shuo Zhao +6 位作者 Ivan B.Djordjevic Shuyu Liu Sijia Wang Tong Wu Bin Li Pingping Wang Rongxiang Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第11期211-218,共8页
Atmospheric effects have significant influence on the performance of a free-space optical continuous variable quantum key distribution(CVQKD)system.In this paper,we investigate how the transmittance,excess noise and i... Atmospheric effects have significant influence on the performance of a free-space optical continuous variable quantum key distribution(CVQKD)system.In this paper,we investigate how the transmittance,excess noise and interruption probability caused by atmospheric effects affect the secret-key rate(SKR)of the CVQKD.Three signal wavelengths,two weather conditions,two detection schemes,and two types of attacks are considered in our investigation.An expression aims at calculating the interruption probability is proposed based on the Kolmogorov spectrum model.The results show that a signal using long working wavelength can propagate much further than that of using short wavelength.Moreover,as the wavelength increases,the influence of interruption probability on the SKR becomes more significant,especially within a certain transmission distance.Therefore,interruption probability must be considered for CVQKD by using long-signal wavelengths.Furthermore,different detection schemes used by the receiver will result in different transmission distances when subjected to individual attacks and collective attacks,respectively. 展开更多
关键词 atmospheric effect continuous variable key distribution free space quantum communication secret-key rate
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Seismic response analysis of a reinforced concrete continuous bridge considering coupling pounding-friction effect
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作者 Lin Yuanzheng Zong Zhouhong +1 位作者 Li Yale Wang Liqi 《Journal of Southeast University(English Edition)》 EI CAS 2018年第3期340-348,共9页
To evaluate the coupling pounding-friction effect between bridge girders and retainers and its influence on bridge seismic response, a reinforced concrete (RC) continuous bridge is selected as the research object. T... To evaluate the coupling pounding-friction effect between bridge girders and retainers and its influence on bridge seismic response, a reinforced concrete (RC) continuous bridge is selected as the research object. Three bridge finite element (FE) models were built using OpenSees, in which the longitudinal and transverse pounding elements, as well as the transverse failure element of bearings were introduced. Based on this, tire seismic response analysis considering the coupling pounding-friction effect was conducted for the continuous bridge subjected to bi-directional ground motions. Furthermore, the influential parameters were analyzed. The analysis results indicate that the coupling pounding-friction effect can alter the internal force distribution of the bridge structure and generate additional torsional force to bridge columns. The friction coefficient and longitudinal pounding gap size are two important factors. The appropriate friction coefficient and longitudinal pounding gap size can significantly reduce seismic response of girders, and effectively transfer part of the girder inertia force from the fixed columns to the sliding columns, which can reduce the seismic demands of the fixed columns and improve the seismic performance of continuous bridge structures. 展开更多
关键词 coupling pounding-friction effect reinforcedconcrete continuous bridge seismic response analysis bi-directional ground motions OPENSEES
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Analysis on influence of seismic travelling wave effect on semi-active control for long-span rigid-continuous bridge 被引量:1
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作者 亓兴军 李小军 周国良 《Acta Seismologica Sinica(English Edition)》 EI CSCD 2006年第2期199-206,共8页
The analysis approach of semi-active control for long-span rigid-continuous bridge under seismic travelling wave input is established. Magnetorheological dampers are set on the positions of the bridge beatings. The se... The analysis approach of semi-active control for long-span rigid-continuous bridge under seismic travelling wave input is established. Magnetorheological dampers are set on the positions of the bridge beatings. The semi-active control calculation and analysis are performed for a five-span rigid-continuous bridge under seismic travelling waves with different apparent surface velocities. The results indicate that travelling wave effect remarkably influences the uncontrolled seismic responses, the semi-active control seismic responses and vibration control effects for the long-span rigid-continuous bridge. It is disadvantageous to the responses of the beams and the piers under the travelling wave input with lower apparent surface velocity, and travelling wave effect can decrease the vibration control effects evidently. Therefore, the travelling wave effect should be considered for the selection of the parameter values of semi-active control system in order to get the designing control effect. 展开更多
关键词 travelling wave effect semi-active control long-span rigid-continuous bridge magnetorheoiogicai damper
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Effect of Continuous Nursing Intervention on Psychological State and Medication Compliance of Patients with Acute Myocardial Infarction after PCI
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作者 Dongyan Wei 《Journal of Advances in Medicine Science》 2018年第1期9-11,共3页
Objective:To explore the effect of continuous nursing intervention on psychological status and medication compliance of patients with acute myocardial infarction after PCI operation.Methods:from February 2013 to Septe... Objective:To explore the effect of continuous nursing intervention on psychological status and medication compliance of patients with acute myocardial infarction after PCI operation.Methods:from February 2013 to September 2016,102 patients with acute myocardial infarction treated by PCI were selected and divided into two groups,51 cases in each group according to the different nursing methods.The observation group was added continuous nursing on the basis of routine nursing,while the control group was the usual nursing mode.The mental state of the two groups before and after treatment was evaluated,and the patients were followed up for 6 months after discharge.The compliance of the two groups at 1,3 and June after discharge was statistically analyzed.Results:before nursing,there was no significant difference in the mental state evaluation between the two groups(P>0.05).After nursing,the mental status of the two groups was improved,while the psychological state of the observation group was better than that of the control group(P<0.05).After 6 months'follow-up,there was no significant difference in the compliance rate between the two groups at 1 months after discharge(P>0.05).In 3 and June,the compliance of the patients in the observation group was better than that in the control group(P<0.05).Conclusion:continuous nursing intervention for patients with acute myocardial infarction after PCI can effectively adjust the unhealthy psychological state of patients,improve medication compliance and promote early rehabilitation of patients. 展开更多
关键词 Acute MYOCARDIAL INFARCTION POSTOPERATIVE PCI continuous NURSING Clinical effect
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Research on Training Needs,Training Transfer,and Training Effectiveness of In-Service Teachers in Local Normal Colleges
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作者 Huanhuan Yang 《Journal of Contemporary Educational Research》 2024年第5期254-257,共4页
This study aims to understand the in-service training needs,training transfer,and training effectiveness of teachers in local normal universities in China,while also proposing a continuous professional development pla... This study aims to understand the in-service training needs,training transfer,and training effectiveness of teachers in local normal universities in China,while also proposing a continuous professional development plan for teachers.Descriptive research methods were employed,with questionnaires serving as the primary data collection tool.The survey revealed that the educational background of teachers in local normal universities is characterized by an unreasonable distribution of academic qualifications,with a shortage of teachers holding postgraduate and higher degrees.Additionally,the training effectiveness for female teachers was found to be lower than that of male teachers.There is a lack of personalization in training needs,which tends to be more generalized.The transfer effect of training is moderate,and there is a need for further enhancement at the behavioral level of training effectiveness.A continuous professional development plan for teachers has been formulated to improve training effectiveness and promote professional development. 展开更多
关键词 Training needs Training transfer Training effectiveness continuous professional development for teachers
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Clinical effects investigation of continuous plasma filtration with adsorption and continuous hematodialysis on improving the immune level of patients with sepsis in ICU
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作者 Yuan-Zheng Yang 《Journal of Hainan Medical University》 2017年第12期39-42,共4页
Objective:To investigate the clinical effects of continuous plasma filtration with adsorption and continuous hematodialysis on improving the immune level of patients with sepsis in ICU. Methods:A total of 80 patients ... Objective:To investigate the clinical effects of continuous plasma filtration with adsorption and continuous hematodialysis on improving the immune level of patients with sepsis in ICU. Methods:A total of 80 patients with sepsis were randomly divided into study group and control group, 40 patients in each group. All the patients were treated by routine treatment. Patients in study group were treated by continuous plasma filtration with adsorption and patients in control group were treated by continuous hematodialysis. The blood samples were collected before and after treatment. The immune cell level, inflammatory factors level, APACHEⅡ score and death rate were compared between two groups.Results:All immune cell indexes were significantly improved in both groups. All immune cell indexes in study group were significantly better than those in control group, after treatment. All inflammatory factors were significantly decreased in both groups. All inflammatory factors in study group were significantly better than those in control group, after treatment. The APACHEⅡ in study group was significantly better than that in control group, after treatment. The death rate in study group was significantly less than that in control group.Conclusion:Continuous plasma filtration with adsorption has a great clinical efficacy on patients with sepsis in ICU, which can improve the immune level and prognosis, makes it worth for clinical application. 展开更多
关键词 SEPSIS continuous PLASMA FILTRATION with ADSORPTION continuous hematodalysis IMMUNE Clinical effects
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Temperature effects on atmospheric continuous-variable quantum key distribution
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作者 Shu-Jing Zhang Hong-Xin Ma +3 位作者 Xiang Wang Chun Zhou Wan-Su Bao Hai-Long Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第8期56-61,共6页
Compared with the fiber channel,the atmospheric channel offers the possibility of a broader geographical coverage and more flexible transmission for continuous-variable quantum key distribution(CVQKD).However,the fluc... Compared with the fiber channel,the atmospheric channel offers the possibility of a broader geographical coverage and more flexible transmission for continuous-variable quantum key distribution(CVQKD).However,the fluctuation of atmospheric conditions will lead to the loss of performance in atmospheric quantum communication.In this paper,we study how temperature affects atmospheric CVQKD.We mainly consider the temperature effects on the transmittance and interruption probability.From the numerical simulation analysis,it can be shown that the performance of atmospheric CVQKD is improved as temperature increases,with the other factors fixed.Moreover,the results in this work can be used to evaluate the feasibility of the experimental implementation of the atmospheric CVQKD protocols. 展开更多
关键词 ATMOSPHERIC continuous-variable QUANTUM KEY distribution temperature effects performance SECRET KEY rate
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An experimental study on preventive effect of continuous irrigation from peridural adhesion after laminectomy
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作者 马泉 《外科研究与新技术》 2011年第2期93-93,共1页
Objective To observe the preventive effect of continuous irrigation with sodium hyaluronate injection from peridural adhesionaminectomy.Methods Larninectomies were performed in L1,L4,L7 of 25 New Zealand rabbits respe... Objective To observe the preventive effect of continuous irrigation with sodium hyaluronate injection from peridural adhesionaminectomy.Methods Larninectomies were performed in L1,L4,L7 of 25 New Zealand rabbits respectively with 3 展开更多
关键词 An experimental study on preventive effect of continuous irrigation from peridural adhesion after laminectomy
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Effect of continuous spinal anesthesia with ropivacaine on the ultrastructure of spinal cord and nerve roots in rats
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作者 孙志华 《外科研究与新技术》 2005年第3期157-157,共1页
To investigate the effects of continuous spinal anesthesia with different concentrations and doses of ropivacaine on the ultrastructure of the spinal cord and nerve roots.Methods Twenty-four male SD rats weighing 220... To investigate the effects of continuous spinal anesthesia with different concentrations and doses of ropivacaine on the ultrastructure of the spinal cord and nerve roots.Methods Twenty-four male SD rats weighing 220~280 g were anesthetized with intraperitoneal 10% chloral hydrate 300~350 mg/kg.A polyurethane microcatheter was inserted into the lumbar subarachnoid space according to the technique described by Yaksh.An 8 cm catheter segment was left in the subarachnoid space.The animals were randomized to receive normal saline,0.5%,0.75% or 1.0% ropivacaine 40 μl intrathecally 3 times at 1.5 h interval.Six hours after the first intrathecal administration the animals were decaptiated and L 1,2 segment of the spinal cord and nerve roots were immediately removed for electron microscopic examination.Results Electron microscopic examination revealed that in animals which received intrathecal (i.t.) normal saline,0.5% or 0.75% ropivacaine the neurolemma of the nerve roots and the mitochondria and endoplasmic reticulum of the neurons in the spinal cord were intact,while in animals which received i.t. 10.% ropivacaine the neurolemma was stratified and partly disrupted and there were swelling of endoplasmic reticulum and vacuole degeneration.Conclusion Six hours continuous spinal anesthesia with 10.% ropivacaine may be injurious to the spinal cord and nerve roots.12 refs,8 figs,1 tab. 展开更多
关键词 effect of continuous spinal anesthesia with ropivacaine on the ultrastructure of spinal cord and nerve roots in rats
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Design and Research on Artificial Rumen Continuous Culture System
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作者 孟宪章 李敏 +2 位作者 施继红 胡晓丽 刘庆福 《Agricultural Science & Technology》 CAS 2012年第11期2445-2448,共4页
[Objective] The paper was to study the dynamic changes of forage nutrient substance fermentation in rumen, and a set of continuous culture system of artificial rumen was designed. [Method] With in vivo as control, the... [Objective] The paper was to study the dynamic changes of forage nutrient substance fermentation in rumen, and a set of continuous culture system of artificial rumen was designed. [Method] With in vivo as control, the simulating rumen fer- mentation effect in vitro culture system was evaluated. [Result] The simulation rumen fermentation test needed adaptive phase of 2-3 d, and the fermentation state was relatively stable within 3-9 d, with good effects. The test showed certain regularity variation with index value of rumen in vivo. [Conclusion] The continuous culture sys- tem of artificial rumen could be used as the ideal model to study the rumen fermen- tation in vivo. 展开更多
关键词 Rumen fermentation continuous culture system Experimental research effect evaluation
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Electromagnetic continuous casting by imposing multi-electromagnetic field 被引量:4
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作者 张志峰 李廷举 +2 位作者 温 斌 姚 山 金俊泽 《中国有色金属学会会刊:英文版》 CSCD 2000年第6期741-744,共4页
In order to obtain cast metal of high quality, an investigation was carried out by simultaneous imposition of multi electromagnetic fields from the outside of a cold crucible copper mold. Sn 4.5%Pb as a simulator of h... In order to obtain cast metal of high quality, an investigation was carried out by simultaneous imposition of multi electromagnetic fields from the outside of a cold crucible copper mold. Sn 4.5%Pb as a simulator of high melting point metal was continuously cast under different conditions. The results show that multi electromagnetic fields can eliminate surface defects, and coarse columnar grains of the solidification structure is turned into equiaxed crystal with the increase of magnetic flux density. Moreover, finer equiaxed crystal structure is obtained when rapidly solidified sheet is fed into the mold during continuous casting.[ 展开更多
关键词 continuous CASTING MULTI ELECTROMAGNETIC field HEREDITY effect quality of CAST meta0
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Numerical study on three-dimensional flow field of continuously rotating detonation in a toroidal chamber 被引量:4
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作者 Xu-Dong Zhang Bao-Chun Fan +2 位作者 Ming-Yue Gui Zhen-Hua Pan Gang Dong 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2012年第1期66-72,共7页
Gaseous detonation propagating in a toroidal chamber was numerically studied for hydrogen/oxygen/nitrogen mixtures. The numerical method used is based on the three-dimensional Euler equations with detailed finiterate ... Gaseous detonation propagating in a toroidal chamber was numerically studied for hydrogen/oxygen/nitrogen mixtures. The numerical method used is based on the three-dimensional Euler equations with detailed finiterate chemistry. The results show that the calculated streak picture is in qualitative agreement with the picture recorded by a high speed streak camera from published literature. The three-dimensional flow field induced by a continuously rotating detonation was visualized and distinctive features of the rotating detonations were clearly depicted. Owing to the unconfined character of detonation wavelet, a deficit of detonation parameters was observed. Due to the effects of wall geometries, the strength of the outside detonation front is stronger than that of the inside portion. The detonation thus propagates with a constant circular velocity. Numerical simulation also shows three-dimensional rotating detonation structures, which display specific feature of the detonation- shock combined wave. Discrete burning gas pockets are formed due to instability of the discontinuity. It is believed that the present study could give an insight into the interest- ing properties of the continuously rotating detonation, and is thus beneficial to the design of continuous detonation propulsion systems. 展开更多
关键词 continuously rotating detonation - Three- dimensional flow field structure - Numerical study Detonation parameters deficit ~ effects of wall geometries
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A Quantitative and Network Approach to Alignment Effects in L2 Continuation Tasks 被引量:2
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作者 Heng CHEN 《Chinese Journal of Applied Linguistics》 2021年第3期399-416,432,共19页
The present study employed a quantitative and network approach to detect alignment effects in second language(L2) continuation tasks designed on the xu-argument(Wang, 2016). The materials used in this study were 6 sub... The present study employed a quantitative and network approach to detect alignment effects in second language(L2) continuation tasks designed on the xu-argument(Wang, 2016). The materials used in this study were 6 sub-corpora consisting of two selected input stories and two groups of L2 written production based on two continuation tasks. During continuation, the participants were required to continue in English a story with its ending removed, with one group reading and continuing the Chinese version and the other group the English version, and then switching their roles in the two tasks. Results show that the alignment effect differs across the two versions of continuation. Specifically, compared with the Chinese-version continuation, L2 learners produced more use of unigrams and bigrams similar to the input story in terms of lexical items, frequency and ranking correlations in the English-version task;on the other hand, the English-version continuation can facilitate generating linguistic networks that are much closer to the native English networks. Moreover, this research corroborates that written production in L2 continuation tasks can be influenced by input content. 展开更多
关键词 continuATION alignment effect language network quantitative linguistics second language acquisition
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