期刊文献+
共找到9篇文章
< 1 >
每页显示 20 50 100
Clinical application of reserved gastric tube in neuroendoscopic endonasal surgery for pituitary tumor
1
作者 Xi Chen Long-Yao Zhang +3 位作者 Zhi-Feng Wang Yi Zhang yu-hua yin Xue-Jian Wang 《World Journal of Clinical Oncology》 2024年第3期411-418,共8页
BACKGROUND The neuroendoscopic approach has the advantages of a clear operative field,convenient tumor removal,and less damage,and is the development direction of modern neurosurgery.At present,transnasal surgery for ... BACKGROUND The neuroendoscopic approach has the advantages of a clear operative field,convenient tumor removal,and less damage,and is the development direction of modern neurosurgery.At present,transnasal surgery for sphenoidal pituitary tumor is widely used.But it has been found in clinical practice that some patients with this type of surgery may experience post-operative nausea and vomiting and other discomforts.AIM To explore the effect of reserved gastric tube application in the neuroendoscopic endonasal resection of pituitary tumors.METHODS A total of 60 patients who underwent pituitary adenoma resection via the endoscopic endonasal approach were selected and randomly divided into the experimental and control groups,with 30 in each group.Experimental group:After anesthesia,a gastric tube was placed through the mouth under direct vision using a visual laryngoscope,and the fluid accumulated in the oropharynx was suctioned intermittently with low negative pressure throughout the whole process after nasal disinfection,during the operation,and when the patient recovered from anesthesia.Control group:Given the routine intraoperative care,no gastric tube was left.The number of cases of nausea/vomiting/aspiration within 24 h post-operation was counted and compared between the two groups;the scores of pharyngalgia after waking up,6 h post-operation,and 24 h postoperation.The frequency of postoperative cerebrospinal fluid leakage and intracranial infection were compared.The hospitalization days of the two groups were statistically compared.RESULTS The times of postoperative nausea and vomiting in the experimental group were lower than that in the control group,and the difference in the incidence of nausea was statistically significant(P<0.05).After the patient woke up,the scores of sore throat 6 h after the operation and 24 h after operation were lower than those in the control group,and the difference was statistically significant(P<0.05).The number of cases of postoperative cerebrospinal fluid leakage and intracranial infection was higher than that of the control group,but there was no statistically significant difference from the control group(P>0.05).The hospitalization days of the experimental group was lower than that of the control group,and the difference was statistically significant(P<0.05).CONCLUSION Reserving a gastric tube in the endoscopic endonasal resection of pituitary tumors,combined with intraoperative and postoperative gastrointestinal decompression,can effectively reduce the incidence of nausea,reduce the number of vomiting and aspiration in patients,and reduce the complications of sore throat The incidence rate shortened the hospitalization days of the patients. 展开更多
关键词 NEUROENDOSCOPY Endonasal approach Pituitary tumor Reserved gastric tube NAUSEA VOMITING ASPIRATION COMPLICATIONS
下载PDF
Positioning and design by computed tomography imaging in neuroendoscopic surgery of patients with chronic subdural hematoma
2
作者 Xue-Jian Wang yu-hua yin +3 位作者 Long-Yao Zhang Zhi-Feng Wang Cheng Sun Zhi-Ming Cui 《World Journal of Clinical Cases》 SCIE 2023年第14期3204-3210,共7页
BACKGROUND Neuroendoscopy is a very useful technique to Chronic Subdural Hematoma(CSH).But how to achieve the goal of treatment more minimally invasive?AIM To develop a simple,fast and accurate preoperative planning m... BACKGROUND Neuroendoscopy is a very useful technique to Chronic Subdural Hematoma(CSH).But how to achieve the goal of treatment more minimally invasive?AIM To develop a simple,fast and accurate preoperative planning method in our way for endoscopic surgery of patients with CSH.METHODS From June 2018 to May 2020,forty-two patients with CSH,admitted to our hospital,were performed endoscopic minimally invasive surgery;computed tomography(CT)imaging was employed to locate the intracerebral hematoma and select the appropriate endoscopic approach before the endoscopic surgery.The clinical data and treatment efficacy were analyzed.RESULTS According to the learning of CT scanning images,the surgeon can accurately design the best minimally invasive neuroendoscopic surgical approach and realize the precise positioning and design of the drilling site of the skull and the size of the bone window,so as to provide the most effective operation space with the smallest bone window.In this group,the average operation time was only about 1 h,and the clearance rate of hematoma was about 95%.CONCLUSION Patients with CSH can achieve good therapeutic effect by using our way to positioning and design to assist the operation of CSH according to CT scan and image,and our way is very useful and necessary. 展开更多
关键词 Chronic subdural hematoma Neurosurgery neuroendoscopy Positioning and design Bone window design
下载PDF
Advances in the mechanism of action of metformin in pituitary tumors
3
作者 Long-Yao Zhang yu-hua yin Xue-Jian Wang 《World Journal of Meta-Analysis》 2023年第5期144-150,共7页
Pituitary tumors are common intracranial tumors,but when faced with drugresistant or aggressive tumors,existing medical measures may not provide good control,leading to progression and deterioration.Metformin,a tradit... Pituitary tumors are common intracranial tumors,but when faced with drugresistant or aggressive tumors,existing medical measures may not provide good control,leading to progression and deterioration.Metformin,a traditional hypoglycemic drug,has recently been discovered to have multiple functions including antitumor effects.There have been studies on the mechanism of metformin for the treatment of pituitary tumors,but it is uncertain whether it will provide new adjuvant or alternative therapies for the treatment of these tumors.We analyzed the potential mechanisms of action of metformin with respect to the inhibition of pituitary tumor growth and hormone secretion by reviewing the available literature. 展开更多
关键词 METFORMIN Pituitary tumor MECHANISM TREATMENT STUDY REVIEW
下载PDF
Efficacy evaluation of neuroendoscopy vs burr hole drainage in the treatment of chronic subdural hematoma:An observational study 被引量:4
4
作者 Xue-Jian Wang yu-hua yin +3 位作者 Zhi-Feng Wang Yi Zhang Cheng Sun Zhi-Ming Cui 《World Journal of Clinical Cases》 SCIE 2022年第35期12920-12927,共8页
BACKGROUND Chronic subdural hematoma(CSDH)is a common disease in neurosurgery.The traditional treatment methods include burr hole drainage,bone flap craniectomy and other surgical methods,and there are certain complic... BACKGROUND Chronic subdural hematoma(CSDH)is a common disease in neurosurgery.The traditional treatment methods include burr hole drainage,bone flap craniectomy and other surgical methods,and there are certain complications such as recurrence,pneumocephalus,infection and so on.With the promotion of neuroendoscopic technology,its treatment effect and advantages need to be further evaluated.AIM To study the clinical effect of endoscopic small-bone approach in CSDH.METHODS A total of 122 patients with CSDH admitted to our hospital from August 2018 to August 2021 were randomly divided into two groups using the digital table method:the neuroendoscopy group(n=61 cases)and the burr hole drainage group(n=61 cases).The clinical treatment effect of the two groups of patients with CSDH was compared.RESULTS At the early postoperative stage(1 d and 3 d),the proportion of 1/2 re-expansion of brain tissue in the hematoma cavity and the proportion of complete reexpansion was higher in the neuroendoscopy group than in the burr hole drainage group,and the difference between the two groups was statistically significant(P<0.05).The recurrence rate of hematoma in the neuroendoscopy group was lower than that in the burr hole drainage group,and the difference between the two groups was statistically significant(P<0.05).No intracranial hematoma,low cranial pressure,tension pneumocephalus or other complications occurred in the neuroendoscopy group.CONCLUSION The neuroendoscopic approach for the treatment of CSDH can clear the hematoma under direct vision and separate the mucosal lace-up.The surgical effect is apparent with few complications and definite curative effect,which is worthy of clinical promotion and application. 展开更多
关键词 NEUROENDOSCOPY Small bone window approach Chronic subdural hematoma Curative effect Burr hole drainage
下载PDF
聚合物接枝纳米粒子两亲性分子在溶液中自组装行为的模拟研究 被引量:4
5
作者 李青霄 王铮 +2 位作者 尹玉华 蒋润 李宝会 《高分子学报》 SCIE CAS CSCD 北大核心 2018年第10期1351-1358,共8页
利用布朗动力学模拟方法,研究了聚合物接枝纳米粒子组成的两亲性分子在溶液中的自组装行为.这种两亲性分子可通过自组装形成多种结构.考察了两亲性分子浓度、疏溶剂纳米粒子直径、聚合物链和纳米粒子之间的相互作用、聚合物链的链长以... 利用布朗动力学模拟方法,研究了聚合物接枝纳米粒子组成的两亲性分子在溶液中的自组装行为.这种两亲性分子可通过自组装形成多种结构.考察了两亲性分子浓度、疏溶剂纳米粒子直径、聚合物链和纳米粒子之间的相互作用、聚合物链的链长以及溶剂性质对组装结构的影响.构建了随不同参数变化的形态相图.我们观察到2种囊泡形成路径,并且通过控制两亲性分子浓度,能实现2种路径之间的转变,并将本研究的模拟结果与已报道的相关实验观测和模拟结果做了比较. 展开更多
关键词 聚合物接枝纳米粒子两亲性分子 自组装 溶液 囊泡形成路径
原文传递
接枝点分布对ABA三嵌段共聚物刷自组装形态的影响 被引量:1
6
作者 徐纪华 陈印启 +3 位作者 尹玉华 蒋润 王铮 李宝会 《高分子学报》 SCIE CAS CSCD 北大核心 2020年第6期632-640,I0005,共10页
采用模拟退火方法研究了接枝点分布对ABA三嵌段共聚物刷在选择性溶剂中自组装形态的影响,其中溶剂对A单体为不良溶剂,对B单体为良溶剂.主要以高接枝密度体系为例,研究了均匀接枝、区域随机接枝和全随机接枝时共聚物刷聚集体的形态,分别... 采用模拟退火方法研究了接枝点分布对ABA三嵌段共聚物刷在选择性溶剂中自组装形态的影响,其中溶剂对A单体为不良溶剂,对B单体为良溶剂.主要以高接枝密度体系为例,研究了均匀接枝、区域随机接枝和全随机接枝时共聚物刷聚集体的形态,分别构建了3种接枝方式下体系的相图,并考察了接枝点分布对ABA三嵌段共聚物刷形态的影响机制.研究表明3种接枝方式下,ABA三嵌段共聚物刷体系形成相图大致相同,并且单层A聚集体结构与双层A聚集体结构在相图中的分界线相同;接枝点分布主要对底部的A富集层胶束形态产生影响,而对顶层胶束形态影响很小.在随机接枝时,接枝点的密度涨落导致底层A聚集体不易形成较规则的形态,其长程有序性较低. 展开更多
关键词 三嵌段共聚物刷 模拟退火 自组装 接枝点
原文传递
ABA三嵌段共聚物在油/水乳化液滴中自组装行为的Monte Carlo模拟研究 被引量:2
7
作者 郑玲飞 王铮 +2 位作者 尹玉华 蒋润 李宝会 《高分子学报》 SCIE CAS CSCD 北大核心 2019年第9期915-924,I0002,共11页
采用Monte Carlo方法,研究了溶剂蒸发条件下对称ABA三嵌段共聚物在油/水乳化液滴中的自组装行为,并与AB双嵌段共聚物体系的模拟结果进行了比较.构建了随表面活性剂浓度(φ)和B嵌段体积分数(fB)变化的相图;观察到无孔粒子、闭孔粒子、开... 采用Monte Carlo方法,研究了溶剂蒸发条件下对称ABA三嵌段共聚物在油/水乳化液滴中的自组装行为,并与AB双嵌段共聚物体系的模拟结果进行了比较.构建了随表面活性剂浓度(φ)和B嵌段体积分数(fB)变化的相图;观察到无孔粒子、闭孔粒子、开孔粒子、胶囊和胶束等形态,以及不同fB下bridge链的比例随φ的变化.研究表明,当fB≤1/2时,随着φ的增大,体系出现从无孔粒子到闭孔粒子再到开孔粒子的形态转变;当fB>1/2时,在较大的φ区间范围内形成胶束.上述形态中bridge链的比例均远小于对应的体相值.由于链构象的影响,当fB≤1/2时,ABA三嵌段共聚物体系中没有出现胶囊结构,这与AB双嵌段共聚物体系不同.相同形态粒子的比表面积大致落在相同的p区间内,表明粒子的形态很大程度上决定了其比表面积;而通过计算粒子的形成能,证实体系中的表面活性剂是多孔粒子形成的关键.这些均与AB双嵌段共聚物体系相同. 展开更多
关键词 ABA三嵌段共聚物 自组装 表面活性剂 乳化液滴 多孔粒子
原文传递
溶剂对嵌段共聚物AB/均聚物C共混体系增容效果的模拟研究 被引量:1
8
作者 刘志瑶 王铮 +2 位作者 尹玉华 蒋润 李宝会 《高分子学报》 SCIE CAS CSCD 北大核心 2019年第11期1229-1237,共9页
采用模拟退火方法研究了两嵌段共聚物AB/均聚物C共混体系在溶液中的相行为.关注于C与A/B为排斥作用时溶剂对它们的增容作用.考察了溶剂的加入量(以聚合物链节的浓度Φ表征)、加入C的体积分数f_c、C与AB的链长比X、C与AB排斥作用、溶剂S... 采用模拟退火方法研究了两嵌段共聚物AB/均聚物C共混体系在溶液中的相行为.关注于C与A/B为排斥作用时溶剂对它们的增容作用.考察了溶剂的加入量(以聚合物链节的浓度Φ表征)、加入C的体积分数f_c、C与AB的链长比X、C与AB排斥作用、溶剂S与C吸引作用强度等对体系相容性及组装行为的影响.构建了作为Φ和f_c的函数的形态相图.研究表明,当X小于0.5,且C与A/B间的排斥作用不是很强时,加入强亲A/C的溶剂能够提高体系的相容性.并获得了层状相、连通相、层中柱状相、核壳柱状相等相结构,其中层中柱状相是纯两嵌段共聚物体系中没有的结构.在高Φ值的体系中,C分布在A/B的界面上;在低Φ值的体系中,C分布在A相区中.研究表明,X越小,C与A、B嵌段的接触数越大,均聚物越容易与两嵌段共聚物相容;X越大,加入少量的均聚物体系就发生宏观相分离,且增加B/C间的排斥作用会降低体系的相容性.体系形态结构的转变以及微相分离到宏观相分离的转变都是体系的能量与熵之间竞争的结果.溶液体系中宏观相分离与熔体时的不同,溶液中部分C链节在AB的界面上以减小AB的接触,而熔体时全部的C链节均与AB宏观相分离. 展开更多
关键词 嵌段共聚物 均聚物 共混 溶剂 增容
原文传递
循环溶剂退火条件下柱状相组成的两嵌段共聚物薄膜自组装行为的模拟研究 被引量:1
9
作者 胡卨俊 郝金龙 +3 位作者 王铮 尹玉华 蒋润 李宝会 《高分子学报》 SCIE CAS CSCD 北大核心 2021年第10期1379-1389,共11页
采用蒙特卡洛模拟研究了体相形成柱状相的两嵌段共聚物薄膜在循环溶剂退火条件下的自组装行为.结果表明,在循环溶剂退火条件下,溶剂蒸发速率、溶剂选择性和有效薄膜厚度与柱状相周期的匹配性都会影响形成垂直柱状结构的表面选择性窗口(... 采用蒙特卡洛模拟研究了体相形成柱状相的两嵌段共聚物薄膜在循环溶剂退火条件下的自组装行为.结果表明,在循环溶剂退火条件下,溶剂蒸发速率、溶剂选择性和有效薄膜厚度与柱状相周期的匹配性都会影响形成垂直柱状结构的表面选择性窗口(β窗口).当溶剂蒸发速率在一定范围内时,β窗口随蒸发速率的增大而增大.溶剂对长嵌段的选择性越强,形成垂直柱状结构的β窗口越宽.当溶胀比约为1.5时的薄膜厚度与柱状相周期不匹配时更利于形成垂直柱状结构.通过对链节均方位移曲线的分析发现,在循环溶剂退火条件下高分子链节在垂直方向的扩散始终快于平行方向,因此链节优先沿垂直方向聚集,从而促进了垂直柱状结构的形成.循环溶剂退火条件下,β窗口比溶剂退火条件下的宽,同时大幅度减少了退火时间. 展开更多
关键词 嵌段共聚物 循环溶剂退火 取向 柱状相
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部