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Nursing care for tracheostomized comatose patients undergoing hyperbaric oxygen therapy Effect observation 认领 引用
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作者 XU Yuan 《外文科技期刊数据库（文摘版）医药卫生》 2026年第6期130-134,共5页
Objective: To evaluate the efficacy of an integrated nursing care protocol in tracheostomized comatose patients undergoing hyperbaric oxygen therapy, with a focus on its impact on neurological outcomes and treatment s... Objective: To evaluate the efficacy of an integrated nursing care protocol in tracheostomized comatose patients undergoing hyperbaric oxygen therapy, with a focus on its impact on neurological outcomes and treatment safety. Methods: From January 2024 to January 2026,80 tracheostomized comatose patients requiring hyperbaric oxygen therapy were enrolled. Patients were randomly assigned into two groups. The control group received standard hyperbaric oxygen therapy protocols and general neurosurgical nursing care;the observation group additionally implemented a comprehensive nursing strategy spanning the entire treatment course, emphasizing patient safety management in the hyperbaric chamber, meticulous respiratory care, continuous monitoring of key physiological parameters, and proactive prevention of complications. Results: Upon completion of the prescribed treatment course, the observation group demonstrated significantly greater improvements in consciousness levels and daily activity scores compared to the control group (P <0.05). Throughout the treatment period, the overall incidence of treatment-or care-related adverse events was markedly lower in the observation group (5.0%) versus the control group (27.5), with a statistically significant difference (P <0.05). Additionally, the observation group exhibited superior clinical outcomes in terms of weaning from mechanical ventilation support and recovery of consciousness. Conclusion: For comatose patients who have undergone tracheostomy, implementing comprehensive and systematic nursing interventions during hyperbaric oxygen therapy can effectively ensure treatment safety, promote neurological function recovery, and significantly reduce complication rates, thereby providing a reliable nursing practice pathway for optimizing the clinical prognosis of such patients. 展开更多
关键词 hyperbaric oxygen therapy tracheostomy coma systematic nursing care clinical efficacy
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半在线策略复用的COMA优化方法 认领 引用
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作者 苏宝龙 曹子建 +2 位作者 李骁 李善梁 张志豪 《西安工业大学学报》 CAS 2026年第2期293-310,共18页
为解决即时策略对抗场景中应用的COMA(Counterfactual Multi-Agent)算法在面对处理样本数量过多时,容易导致训练时间冗长以及训练过程中策略迭代不稳定等问题,提出一种半在线策略复用的改进COMA算法SPR-COMA(Semi-online policy reuse-C... 为解决即时策略对抗场景中应用的COMA(Counterfactual Multi-Agent)算法在面对处理样本数量过多时,容易导致训练时间冗长以及训练过程中策略迭代不稳定等问题,提出一种半在线策略复用的改进COMA算法SPR-COMA(Semi-online policy reuse-Counterfactual Multi-Agent),该算法的核心思想是对离线策略进行重新利用,在每轮Actor网络与环境交互前,将当前Actor网络代表的策略与离线策略回放池中的作比对,若差异小于某一阈值则使用离线策略数据训练Critic网络,以减少与环境的交互;否则Actor网络正常进行交互生成新数据,而在训练Critic网络时将池中与当前策略对比差异最小的策略参数、梯度进行融合训练,防止梯度波动过大。最后,在StarCraftⅡ平台中与原始COMA算法进行对比试验,结果显示SPR-COMA算法的训练时间在不同环境下分别缩短67.7%、43.3%、57.8%,且回报方差分别降低7.7%、29.2%、5.3%,其平均胜率、全局回报与QMIX、MAVEN等目前先进多智能体算法相比并不逊色。 展开更多
关键词 多智能体 反事实多智能体策略梯度算法 强化学习 策略复用 策略融合
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Association between Serum Chloride Levels and Prognosis in Patients with Hepatic Coma in the Intensive Care Unit 认领 引用
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作者 Shuxing Wei Xiya Wang +7 位作者 Yuan Du Ying Chen Jinlong Wang Yue Hu Wenqing Ji Xingyan Zhu Xue Mei Da Zhang 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2025年第10期1255-1269,共15页
Objective To explore the relationship between serum chloride levels and prognosis in patients with hepatic coma in the intensive care unit(ICU).Methods We analyzed 545 patients with hepatic coma in the ICU from the Me... Objective To explore the relationship between serum chloride levels and prognosis in patients with hepatic coma in the intensive care unit(ICU).Methods We analyzed 545 patients with hepatic coma in the ICU from the Medical Information Mart for Intensive Care IV(MIMIC-IV)database.Associations between serum chloride levels and 28-day and 1-year mortality rates were assessed using restricted cubic splines(RCSs),Kaplan-Meier(KM)curves,and Cox regression.Subgroup analyses,external validation,and mechanistic studies were also performed.Results A total of 545 patients were included in the study.RCS analysis revealed a U-shaped association between serum chloride levels and mortality in patients with hepatic coma.The KM curves indicated lower survival rates among patients with low chloride levels(<103 mmol/L).Low chloride levels were independently linked to increased 28-day and 1-year all-cause mortality rates.In the multivariate models,the hazard ratio(HR)for 28-day mortality in the low-chloride group was 1.424(95%confidence interval[CI]:1.041–1.949),while the adjusted hazard ratio for 1-year mortality was 1.313(95%CI:1.026–1.679).Subgroup analyses and external validation supported these findings.Cytological experiments suggested that low chloride levels may activate the phosphorylation of the NF-κB signaling pathway,promote the expression of pro-inflammatory cytokines,and reduce neuronal cell viability.Conclusion Low serum chloride levels are independently associated with increased mortality in patients with hepatic coma. 展开更多
关键词 Hepatic coma Chloride Mortality Intensive care unit
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Resuscitation therapy for traumatic brain injuryinduced coma in rats:mechanisms of median nerve electrical stimulation 认领 引用 被引量：26
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作者 Zhen Feng Ying-jun Zhong +1 位作者 Liang Wang Tian-qi Wei 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第4期594-598,共5页
In this study, rats were put into traumatic brain injury-induced coma and treated with median nerve electrical stimulation. We explored the wake-promoting effect, and possible mechanisms, of median nerve electrical st... In this study, rats were put into traumatic brain injury-induced coma and treated with median nerve electrical stimulation. We explored the wake-promoting effect, and possible mechanisms, of median nerve electrical stimulation. Electrical stimulation upregulated the expression levels of orexin-A and its receptor OX1R in the rat prefrontal cortex. Orexin-A expression gradually in-creased with increasing stimulation, while OX1R expression reached a peak at 12 hours and then decreased. In addition, after the OX1R antagonist, SB334867, was injected into the brain of rats after traumatic brain injury, fewer rats were restored to consciousness, and orexin-A and OXIR expression in the prefrontal cortex was downregulated. Our ifndings indicate that median nerve electrical stimulation induced an up-regulation of orexin-A and OX1R expression in the pre-frontal cortex of traumatic brain injury-induced coma rats, which may be a potential mechanism involved in the wake-promoting effects of median nerve electrical stimulation. 展开更多
关键词 nerve regeneration traumatic brain injury coma median nerve electrical stimulation wake-promoting orexin-A OX1R NSFC grants neural regeneration
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COMAS烘丝机整体改造与应用 认领 引用 被引量：20
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作者 徐伟民 刘剑敏 +1 位作者 舒梦 徐荣华 《烟草科技》 CAS 北大核心 2011年第2期17-20,共4页
浙江中烟工业有限责任公司下设两个生产基地,分别配备COMAS逆流式烘丝机和HAUNI顺流式烘丝机。为了克服烘丝机设备和叶丝干燥工艺差异、统一制丝生产工艺、实现不同产地产品的同质化,在对比分析了两种烘丝机工作原理和控制方式的基础上,... 浙江中烟工业有限责任公司下设两个生产基地,分别配备COMAS逆流式烘丝机和HAUNI顺流式烘丝机。为了克服烘丝机设备和叶丝干燥工艺差异、统一制丝生产工艺、实现不同产地产品的同质化,在对比分析了两种烘丝机工作原理和控制方式的基础上,对COMAS烘丝机进行了整体改造。内容包括:热风流向变为顺流式;风机增加变频调速功能,调节热风流量,减少能源消耗;采用HAUNI方式的热风温度与筒壁温度控制方式;在出料端安装负压传感器保持烘丝机进出风量平衡。改造后的COMAS烘丝机的热风流向、控制方式趋近于HAUNI顺流式烘丝机,各项工艺和物理指标均达到或优于改造前水平,烘丝冷却后含水率控制稳定,含水率偏差控制在0.18%以内,有效控制了干头干尾烟丝量,且减少了蒸汽消耗。 展开更多
关键词 COMAS烘丝机 HAUNI烘丝机 控制模式 热风流向 含水率
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Prognosis in prolonged coma patients with diffuse axonal injury assessed by somatosensory evoked potential 认领 引用 被引量：7
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作者 Xiujue Zheng Mantao Chen +1 位作者 Jingqi Li Fei Cao 《Neural Regeneration Research》 SCIE CAS CSCD 2013年第10期948-954,共7页
A total of 43 prolonged coma patients with diffuse axonal injury received the somatosensory evoked potential examination one month after injury in the First Affiliated Hospital, School of Medicine, Zhejiang University... A total of 43 prolonged coma patients with diffuse axonal injury received the somatosensory evoked potential examination one month after injury in the First Affiliated Hospital, School of Medicine, Zhejiang University in China. Somatosensory evoked potentials were graded as normal, abnormal or absent （grades I-III） according to N20 amplitude and central conduction time. The outcome in patients with grade III somatosensory evoked potential was in each case unfavorable. The prognostic accuracy of grade III somatosensory evoked potential for unfavorable and non-awakening outcome was 100% and 80%, respectively. The prognostic accuracy of grade I somatosensory evoked potential for favorable and wakening outcome was 86% and 100%, respectively. These results suggest that somatosensory evoked potential grade is closely correlated with coma severity and degree of recovery. Somatosensory evoked potential is a valuable diagnostic tool to assess prognosis in prolonged coma patients with diffuse axonal injury. 展开更多
关键词 neural regeneration brain injury somatosensory evoked potential diffuse axonal injury coma prognosis awakening nerve electrophysiology grants-supported paper neuroregeneration
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Glasgow coma scale and APACHE-II scores affect the liver transplantation outcomes in patients with acute liver failure 认领 引用 被引量：10
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作者 Necdet Guler Omer Unalp +5 位作者 Ayse Guler Onur Yaprak Murat Dayangac Murat Sozbilen Murat Akyildiz Yaman Tokat 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2013年第6期589-593,共5页
BACKGROUND:The timing and selection of patients for liver transplantation in acute liver failure are great challenges.This study aimed to investigate the effect of Glasgow coma scale(GCS)and APACHE-II scores on liver ... BACKGROUND:The timing and selection of patients for liver transplantation in acute liver failure are great challenges.This study aimed to investigate the effect of Glasgow coma scale(GCS)and APACHE-II scores on liver transplantation outcomes in patients with acute liver failure.METHOD:A total of 25 patients with acute liver failure were retrospectively analyzed according to age,etiology,time to transplantation,coma scores,complications and mortality.RESULTS:Eighteen patients received transplants from live donors and 7 had cadaveric whole liver transplants.The mean duration of follow-up after liver transplantation was 39.86±40.23 months.Seven patients died within the perioperative period and the 1-,3-,5-year survival rates of the patients were72%,72%and 60%,respectively.The parameters evaluated for the perioperative deaths versus alive were as follows:the mean age of the patients was 33.71 vs 28 years,MELD score was 40 vs32.66,GCS was 5.57 vs 10.16,APACHE-II score was 23 vs 18.11,serum sodium level was 138.57 vs 138.44 mmol/L,mean waiting time before the operation was 12 vs 5.16 days.Low GCS,high APACHE-II score and longer waiting time before the operation(P【0.01)were found as statistically significant factors for perioperative mortality.CONCLUSION:Lower GCS and higher APACHE-II scores are related to poor outcomes in patients with acute liver failure after liver transplantation. 展开更多
关键词 liver transplantation acute liver failure APACHE-II waiting time Glasgow coma scale
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Timing of brain computed tomography for predicting neurological prognosis in comatose cardiac arrest survivors: a retrospective observational study 认领 引用 被引量：5
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作者 Gan-nan Wang Zhong-man Zhang +2 位作者 Wen Chen Xiao-quan Xu Jin-song Zhang 《World Journal of Emergency Medicine》 SCIE CAS CSCD 2022年第5期349-354,共6页
BACKGROUND:To assess the association between relevant brain computed tomography(CT)parameters at different time and neurological prognosis in adult comatose survivors after cardiac arrest(CA).METHODS:A total of 94 CA ... BACKGROUND:To assess the association between relevant brain computed tomography(CT)parameters at different time and neurological prognosis in adult comatose survivors after cardiac arrest(CA).METHODS:A total of 94 CA patients who underwent early and late CT scans(within 24 h and 24 h to 7 d respectively after CA)between January 2018 and April 2020 were enrolled in this retrospective study.According to the Cerebral Performance Category(CPC)score at hospital discharge,the patients were divided into either a good outcome(CPC 1-2)group or a poor-outcome group(CPC 3-5).The grey-to-white matter ratio(GWR)and the proportion of cerebrospinal fluid volume(pCSFV)were measured.In predicting poor outcomes,the prognostic performance of relevant CT parameters was evaluated,and the comparison analysis(expressed as the ratio of parameters in late CT to those in the early CT)of diff erent CT time was conducted.RESULTS:Totally 26 patients were in the good-outcome group,while 68 patients were in the poor-outcome group.The putamen density,GWR,and pCSFV in late CT were significantly lower in the poor-outcome group(P24 h after CA may be a good choice as a neuroimaging approach to evaluating prognosis.To predict neurological prognosis,comparison analysis of diff erent CT time can be used as another promising tool in comatose CA survivors. 展开更多
关键词 Cardiac arrest Brain computed tomography Cerebral edema Coma Prognosis
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Amplitude-Integrated Electroencephalography Predicts Outcome in Patients with Coma After Acute Brain Injury 认领 引用 被引量：18
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作者 Wendong You Qilin Tang +4 位作者 Xiang Wu Junfeng Feng Qing Mao Guoyi Gao Jiyao Jiang 《Neuroscience Bulletin》 SCIE CAS CSCD 2018年第4期639-646,共8页
Prognostication of coma patients after brain injury is important, yet challenging. In this study, we evaluated the predictive value of amplitude-integrated electroencephalography （aEEG） for neurological outcomes in ... Prognostication of coma patients after brain injury is important, yet challenging. In this study, we evaluated the predictive value of amplitude-integrated electroencephalography （aEEG） for neurological outcomes in coma patients. From January 2013 to January 2016, 128 coma patients after acute brain injury were prospectively enrolled and monitored with aEEG. The 6-month neurological outcome was evaluated using the Cerebral Performance Category Scale. aEEG monitoring commenced at a median of 7.5 days after coma onset. Continuous normal voltage predicted a good 6-month neurological outcome with a sensitivity of 93.6% and specificity of 85.2%. In contrast, continuous extremely low voltage, burst-suppression, or a flat tracing was correlated with poor 6-month neurological outcome with a sensitivity of 76.5% and specificity of 100%. In conclusion, aEEG is a promising predictor of 6-month neurological outcome for coma patients after acute brain injury. 展开更多
关键词 Amplitude-integrated electroencephalography -Coma Acute brain injury Outcome
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Endozepine-4 levels are increased in hepatic coma 认领 引用 被引量：3
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作者 Giulia Malaguarnera Marco Vacante +4 位作者 Filippo Drago Gaetano Bertino Massimo Motta Maria Giordano Michele Malaguarnera 《World Journal of Gastroenterology》 SCIE CAS 2015年第30期9103-9110,共8页
AIM:To evaluate the serum levels of endozepine-4,their relation with ammonia serum levels,the grading of coma and the severity of cirrhosis,in patients with hepatic coma. METHODS:In this study we included 20 subjects ... AIM:To evaluate the serum levels of endozepine-4,their relation with ammonia serum levels,the grading of coma and the severity of cirrhosis,in patients with hepatic coma. METHODS:In this study we included 20 subjects with Hepatic coma,20 subjects with minimal hepatic encephalopathy(MHE) and 20 subjects control. All subjects underwent blood analysis,Child Pugh and Model for End- stage liver disease(MELD) assessment,endozepine-4 analysis. RESULTS:Subjects with hepatic coma showed significant difference in endozepine-4(P < 0.001) and NH3 levels(P < 0.001) compared both to MHE and controls patients. Between NH3 and endozepine-4 we observed a significant correlation(P = 0.009; Pearson correlation 0.570). There was a significant correlation between endozepine-4 and MELD(P = 0.017; Pearsoncorrelation = 0.529). In our study blood ammonia concentration was noted to be raised in patients with hepatic coma,with the highest ammonia levels being found in those who were comatose. We also found a high correlation between endozepine-4 and ammonia(P < 0.001). In patients with grade Ⅳ hepatic coma,endozepine levels were significantly higher compared to other groups. CONCLUSION:This study suggests that an increased level of endozepine in subjects with higher levels of MELD was observed. In conclusion,data concerning involvement of the GABA-ergic system in HE coma could be explained by stage-specific alterations. 展开更多
关键词 Endozepine-4 Hepatic encephalopathy Hepatic coma Cirrhosis, Benzodiazepine Peripheralbenzodiazepine receptor Model for End stage liverdisease Glutamate-related neurotoxicity which in turnmay alter the γ-aminobutyric acid
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西学东渐——新译“Glasgow coma scale” 认领 引用 被引量：4
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作者 邹西峰 李建民 +1 位作者 李兵 费舟 《医学争鸣》 北大核心 2014年第2期31-34,共4页
西方的科学研究成果大多来源于英语的语言文化环境,把西方的科学研究成果介绍到中国,必须重视英语的语言文化环境和汉语的语言文化环境的不同,这样才能使国人准确、方便地应用西方的科学研究成果,西学东渐。格拉斯哥昏迷评分(Glasgow co... 西方的科学研究成果大多来源于英语的语言文化环境,把西方的科学研究成果介绍到中国,必须重视英语的语言文化环境和汉语的语言文化环境的不同,这样才能使国人准确、方便地应用西方的科学研究成果,西学东渐。格拉斯哥昏迷评分(Glasgow coma scale)被翻译、介绍到国内已有数十年,但汉语版的"Glasgow coma scale"多种多样,容易造成初学者和使用者的迷惑。本文复习有关"Glasgow coma scale"的原始英式英文文献、美式英语英文文献和以往的几个主要的汉语翻译版。结合英式英语、美式英语和汉语的语言文化特点,新译了"Glasgow coma scale",以方便医护人员使用。 展开更多
关键词 Glasgow coma scale 英语 汉语 翻译
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Finger or Light:Stimulation Sensitivity of Visual Startle in the Coma Recovery Scale-Revised for Disorders of Consciousness 认领 引用 被引量：4
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作者 Feng Zhou Hui Li +8 位作者 Kai Wang Yanbin He Yan Chen Xiaoxiao Ni Yechun Guo Wei Lv Jiechun Zhang Qiuyou Xie Ronghao Yu 《Neuroscience Bulletin》 SCIE CAS CSCD 2018年第4期709-712,共4页
Dear Editor,Coma, the vegetative state （VS）, and the minimally- conscious state （MCS）, often collectively referred to as disorders of consciousness （DOCs）, typically occur after severe traumatic or non-traumatic... Dear Editor,Coma, the vegetative state （VS）, and the minimally- conscious state （MCS）, often collectively referred to as disorders of consciousness （DOCs）, typically occur after severe traumatic or non-traumatic brain injury [1]. The boundary between awareness and unawareness remains elusive, making it difficult to correctly distinguish MCS from VS patients. It is possible to employ noninvasive neuroimaging techniques, such as functional MRI （fMRI） [2] to assess residual cognitive processing as well as consciousness. However, the causal link between neural activity in specific brain areas and specific behavioral tasks is hard to dissect using fMRI [3]. Therefore, detecting residual cognitive function and consciousness in patients surviving severe brain injury remains extremely challenging. 展开更多
关键词 Finger or Light Stimulation Sensitivity of Visual Startle in the Coma Recovery Scale-Revised for Disorders of Consciousness TBI
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Bacillus subtilis MO-L010中ComA蛋白对脂肽合成的影响及高产工程菌株的构建 认领 引用 被引量：1
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作者 顾晓波 郑宗明 +3 位作者 俞海清 黄英 梁凤来 刘如林 《南开大学学报（自然科学版）》 CAS 北大核心 2005年第2期70-73,共4页
脂肽是一类用途广泛的生物活性物质.本文研究了早期感受态基因comA表达对脂肽合成的影响,并据此构建了脂肽高产基因工程菌株,其产量较原菌株提高了约20%,达到450mg/L.
关键词 脂肽 comA基因 枯草芽孢杆菌 生物活性物质
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Prognostic value of dynamic electroencephalogram in comatose patients with different diseased regions 认领 引用 被引量：4
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作者 Huapin Huang Chunhui Che An Zheng Xiaoyun Zhuang Fang Jiang Nan Liu 《Neural Regeneration Research》 CAS 2007年第7期421-424,共4页
BACKGROUND： It has proved that dynamic electroencephalogram （EEG） is definite in judging the outcome of ischemic hypoxic comatose patients, EEG is more sensitive to the cortical affection, but not sensitive to the ... BACKGROUND： It has proved that dynamic electroencephalogram （EEG） is definite in judging the outcome of ischemic hypoxic comatose patients, EEG is more sensitive to the cortical affection, but not sensitive to the subcortical and brainstem affections, thus it is necessary to clarify the indications of this technique in the clinical application.OBJECTIVE： To observe and compare the prognostic value of dynamic EEG and Glasgow coma score in comatose patients with different diseased region.DESIGN： A clinical case-controlled observation.SETTING： Union Hospital of Fujian Medical University.PARTICIPANTS： Sixty-eight comatose patients were selected from the Union Hospital affiliated to Fujian Medical University from June 1998 to January 2005. The diseased regions were identified using cranial CT （n =43） or MR （n =25）. According to different primarily diseased regions, the comatose patients were divided into two groups： ① brainstem affection group （n =23）： 13 males and 10 females, 14 - 62 years of age; ②diffuse cortical affection group （n =45）： 28 males and 17 females, 23 - 75 years of age.METHODS： The dynamic EEG and Glasgow coma score were examined in the 45 comatose patients with primarily cortical affection and 22 comatose patients with primarily brainstem affection at acute phase. The patients were followed-up for 3 months to observe the outcome, The termination of outcome judgment was 3 months after attack or the death. The clinical outcome was classified as complete rehabilitation, survived with disability, death or vegetative state. Correlations of dynamic EEG and Glasgow coma score with the outcome of patients were analyzed. The correlations of dynamic EEG grades and Glasgow coma scores with the outcome were analyzed, and the prognostic value of dynamic EEG grades was compared between the two groups.MAIN OUTCOME MEASURES： ① Correlations of dynamic EEG and Glasgow coma score with the outcome of patients; ② Comparison of the prognostic value of dynamic EEG grades between the two groups.RESULTS： All the 68 patients were involved in the analysis of results. ① Correlations of dynamic EEG grades and Glasgow scores and their correlation analysis： EEG grades had significant negative correlation with Glasgow coma scores in both the cortical affection group and brainstem affection group （r = - 0.743,- 0.564, P 〈 0.01, 0.05）. In the cortical affection group, the Glasgow coma scores and dynamic EEG grades in the patients with the outcome of death or vegetative state were significantly different from those with the outcome of rehabilitation （P 〈 0.05 - 0.01）. In the brainstem affection group, the Glasgow coma scores were only significantly different between the patients with outcome of rehabilitation and death （P 〈 0.05）, and there was no significant difference in dynamic EEG grades among the three prognostic states （P 〉 0.05）. ②Comparison of the prognostic value of dynamic EEG grades between comatose patients with cortical affection and brainstem affection： The sensitivity, specificity and accuracy were all higher （P 〈 0.05）, while the error rate was lower （P〈0.05） in the cortical affection group than in the brainstem affection group.CONCLUSION： Dynamic EEG was valuable in predicting the outcome of comatose patients with primarily cortical affection, but it was not certainly valuable in those with primarily brainstem affection. 展开更多
关键词 dynamic electroencephalogram brainstem infarction coma outcome cerebral cortex
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Coma星系团的研究进展 认领 引用 被引量：1
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作者 田凯平 邵正义 黄卫红 《天文学进展》 北大核心 1995年第2期152-163,共12页
Coma团是离我们最近的典型富星系团之一。对此，人们积累了丰富的观测资料，并且进行了广泛深入的研究。在本文中着重介绍有关Coma团的成员判定、结构、光度函数、动力学和次结构等方面的研究情况，并简单介绍目前的最新研究动态。
关键词 星系 星系团 Coma团 研究进展
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COMAS-A1型切丝机铜排链水雾润滑施加装置的设计 认领 引用 被引量：4
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作者 戴宇昕 《烟草科技》 CAS CSCD 北大核心 2016年第5期100-104,共5页
为解决COMAS-A1型切丝机在使用过程中,存在铜排链与耐磨板间磨损严重、备件更换频次高、维护工作量大等问题,设计了一套铜排链水雾润滑施加装置。通过单介质小孔雾化喷嘴试验,确定纯净水作为介质对铜排链内侧进行水雾喷射润滑;选用外混... 为解决COMAS-A1型切丝机在使用过程中,存在铜排链与耐磨板间磨损严重、备件更换频次高、维护工作量大等问题,设计了一套铜排链水雾润滑施加装置。通过单介质小孔雾化喷嘴试验,确定纯净水作为介质对铜排链内侧进行水雾喷射润滑;选用外混合式双介质喷嘴,喷嘴流量设为0.045 L/min,可以取得良好的雾化效果;以40 s为喷射控制周期,0.3-0.4 MPa压缩空气为引射介质,可以形成均匀的液膜而不发生滴漏。结果表明：水雾润滑装置有效降低了铜排链与耐磨板之间的摩擦程度,铜排链和耐磨板的使用寿命分别延长了40%和100%,两年节省备件费用9万余元,减少了维护保养工作量。 展开更多
关键词 COMAS-A1型切丝机 铜排链 耐磨板 磨损 润滑 喷嘴
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Predicting various outcomes of post-resuscitation comatose survivors: PRCSs Prognostication Score 认领 引用
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作者 Xin-Ke Meng Zhi-Gang Zhao +5 位作者 Guang-Fen Wu Gang Wei Sun-Ting Su De-Hong Liu Xiao-Ying Zhen Shao-Quan Shi 《Journal of Geriatric Cardiology》 CAS 2009年第4期204-208,共5页
Objective To develop a tool capable of early and exactly predicting various outcomes in comatose survivors who restore spontaneous circulation after cardiopulmonary resuscitation （CPR） and validate its performance. ... Objective To develop a tool capable of early and exactly predicting various outcomes in comatose survivors who restore spontaneous circulation after cardiopulmonary resuscitation （CPR） and validate its performance. Methods Variables that were both readily available and predictive of outcomes were identified by systematically reviewing published literature on resuscitation. A value was assigned to these variables. We used these variables in combination with APACHE II score to devise a multifactorial prediction score system, which we called PRCSs Prognostication Score （PRCSs-PS）. Outcomes in 115 hospitalized comatose survivors after CPR were retrospectively reviewed using PRCSs-PS. Score of patients with different outcomes was compared. The area under the receiver- operating characteristic （ROC） curve was determined to evaluate performance of this tool to identify patients with a poor outcome （CPC4 and 5） and other outcomes （CPC1, 2, and 3）. Results There were differences of PRCSs-PS score among multiple groups with five different outcomes （CPC 1-5）（F=65.91, P=0.000）. Pairwise groups with different CPC were compared： no significant difference was noted between CPC1 and CPC2 （12.41±6.49 vs 17.38±6.91,P=0.092）, but difference between other pairwise CPC groups was statistically significant （CPC2 vs CPC3：17.38±6.91 vs 24.50±5.80, P=0.041, CPC3 vs CPC4：24.50±5.80 vs 32.29±5.24, P=0.006）. The performance of PRCSs-PS to discriminate patients with a poor outcome from patients with other outcomes went as follows： it had 100% sensitivity, 78.6% specificity, and 178.6 diagnostic index at the score cut-off22.5; it had 77.8% sensitivity, 100% specificity and 176.4 diagnostic index at the score cut-off32.5. Score 23 and 33 were two key cut-offpoints. The area under the ROC curve was 0.968, showing excellent discrimination. Conclusions The final outcomes in post-resuscitation comatose survivors can be accurately predicted using PRCSs-PS Score. 展开更多
关键词 cardiopulmonary resuscitation （CPR） coma prognosis score
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A synchrotron self-Compton scenario for the very high energy γ-ray emission of the intermediate BL Lacertae object W Comae 认领 引用 被引量：1
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作者 Jin Zhang 《Research in Astronomy and Astrophysics》 SCIE CAS 2009年第7期777-782,共6页
W Comae has significant variability in multi-wavelengthes, from radio to gamma-ray bands. A bright outburst in optical and X-ray bands was observed in 1998, and most recently, a strong TeV flare was detected by VERITA... W Comae has significant variability in multi-wavelengthes, from radio to gamma-ray bands. A bright outburst in optical and X-ray bands was observed in 1998, and most recently, a strong TeV flare was detected by VERITAS in 2008. It is the first TeV intermediate-frequency-peaked BL Lacertae source. I find that both the broadband spectral energy distributions （SEDs） which were quasi-simultaneously obtained during the TeV flare and during the optical/X-ray outburst are well fit by using a single-zone synchrotron ＋ synchrotron-self-Compton model. The satisfactory fitting requires a large beaming factor, i.e., δ- 25 and δ- 20 for the TeV flare and the optical/X-ray outburst, respectively, suggesting that both the optical/X-ray outburst and the TeV flare are from a relativistic jet. The size of the emission region of the TeV flare is three times larger than that of the optical/X-ray outburst, and the strength of the magnetic field for the TeV flare is - 14 times smaller than that of the X-ray/optical outburst, likely indicating that the region of the TeV flare is more distant from the core than that of the X-ray/optical outburst. The inverse Compton component of the TeV flare peaks around 1.3 GeV, but it is around 20 MeV for the X-ray/optical outburst, lower than that for the TeV flare by two orders of magnitude. The model predicts that the optical/X-ray outburst might be accompanied by a strong MeV/GeV emission, but the TeV flare may be not associated with the X-ray/optical outburst. The GeV emission is critical for characterizing the SEDs of the optical/X-ray outburst and the TeV flare. The predicted GeV flux is above the sensitivity of Fermi/LAT, and it could be verified with the observations by Fermi/LAT in the near future. 展开更多
关键词 BL Lacertae objects： individual： W Comae - gamma-rays observations - gamma-rays theory - radiation mechanisms non-thermal
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Bispectral index in predicting the prognosis of patients with coma in intensive care unit 认领 引用 被引量：16
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作者 Lin Dou Hong-mei Gao +1 位作者 Ling Lu Wen-xiu Chang 《World Journal of Emergency Medicine》 CAS 2014年第1期53-56,共4页
BACKGROUND: The bispectral(BIS) index is a processed electroencephalogram(EEG) parameter with extensive validation and demonstrated clinical utility. The study aimed to investigate the correlation between the BIS inde... BACKGROUND: The bispectral(BIS) index is a processed electroencephalogram(EEG) parameter with extensive validation and demonstrated clinical utility. The study aimed to investigate the correlation between the BIS index and the prognosis of patients with coma in the ICU.METHODS: A total of 208 patients with coma in the ICU were enrolled in this study. According to the BIS value, the patients were divided into four groups: group I, BIS value 0 to 20; group II, BIS value 21 to 40; group III, BIS value 41 to 60; and group IV, BIS value greater than 60. The difference in BIS values with the differences in prognosis of patients with coma was compared between the four groups, and the prognosis of patients with coma was stratified into consciousness, coma, vegetative state, and brain death. Subsequently, the best cut-off score of BIS values calculated for determining the correlation between BIS value and mental state was proposed.RESULTS: There are no significant differences in the age and APACHE II scores between the four groups(P>0.05). An inverse correlation was observed between BIS value and mental state(r= –0.749, P=0.00). According to the ROC curve, as BIS value was greater than 42.5, there were higher sensitivity and specificity in conscious-coma patients.CONCLUSION: BIS value is correlated with the prognosis of patients with coma in ICU, and BIS value can be a useful marker for estimating the prognosis of comatose patients. 展开更多
关键词 Bispectral index Coma Prognosis
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Prognostic values of optic nerve sheath diameter for comatose patients with acute stroke:An observational study 认领 引用 被引量：5
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作者 Sha Zhu Chao Cheng +3 位作者 Liu-Liu Wang Dian-Jiang Zhao Yuan-Li Zhao Xian-Zeng Liu 《World Journal of Clinical Cases》 SCIE 2022年第33期12175-12183,共9页
BACKGROUND Optic nerve sheath diameter(ONSD)measurement is one of the non-invasive methods recommended for increased intracranial pressure(ICP)monitoring.AIM This study aimed to evaluate the roles of optic nerve sheat... BACKGROUND Optic nerve sheath diameter(ONSD)measurement is one of the non-invasive methods recommended for increased intracranial pressure(ICP)monitoring.AIM This study aimed to evaluate the roles of optic nerve sheath diameter(ONSD)and ONSD/eyeball transverse diameter(ETD)ratio in predicting prognosis of death in comatose patients with acute stroke during their hospitalization.METHODS A total of 67 comatose patients with acute stroke were retrospectively recruited.The ONSD and ETD were measured by cranial computed tomography(CT)scan.All patients underwent cranial CT scan within 24 h after coma onset.Patients were divided into death group and survival group according to their survival status at discharge.The differences of the ONSD and ONSD/ETD ratio between the two groups and their prognostic values were compared.RESULTS The ONSD and ONSD/ETD ratio were 6.07±0.72 mm and 0.27±0.03 in the comatose patients,respectively.The ONSD was significantly greater in the death group than that in the survival group(6.32±0.67 mm vs 5.65±0.62 mm,t=4.078,P5.7 mm or the ONSD/ETD ratio was>0.25.Both indexes could be used as prognostic tools for comatose patients with acute stroke.The ONSD/ETD ratio was more stable than the ONSD alone,which would be preferred in clinical practice. 展开更多
关键词 Optic nerve sheath diameter Eyeball transverse diameter Coma Intracranial pressure Stroke Prognosis
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