In general,the treatment methods for esophageal achalasia are largely classified into four groups,including drug therapy using nitrite or a calcium channel blocker,botulinum toxin injection,endoscopic therapy such as ...In general,the treatment methods for esophageal achalasia are largely classified into four groups,including drug therapy using nitrite or a calcium channel blocker,botulinum toxin injection,endoscopic therapy such as endoscopic balloon dilation,and surgery. Various studies have suggested that the most effective treatment of esophageal achalasia is surgical therapy. The basic concept of this surgical therapy has not changed since Heller proposed esophageal myotomy for the purpose of resolution of lower esophageal obstruction for the first time in 1913,but the most common approach has changed from openchest surgery to laparoscopic surgery. Currently,the laparoscopic surgery has been the procedure of choice for the treatment of esophageal achalasia. During the process of the transition from open-chest surgery to laparotomy,to thoracoscopic surgery,and to laparoscopic surgery,the necessity of combining antireflux surgery has been recognized. There is some debate as to which type of antireflux surgery should be selected. The Toupet fundoplication may be the most effective in prevention of postoperative antireflux,but many medical institutions have selected the Dor fundoplication which covers the mucosal surface exposed by myotomy. Recently,a new endoscopic approach,peroral endoscopic myotomy(POEM),has received attention. Future studies should examine the long-term outcomes and whether POEM becomes the gold standard for the treatment of esophageal achalasia.展开更多
After the rapid acceptance of laparoscopy to manage multiple benign diseases arising from gastrointestinal districts,some surgeons started to treat malignancies by the same way.However,if the limits of laparoscopy for...After the rapid acceptance of laparoscopy to manage multiple benign diseases arising from gastrointestinal districts,some surgeons started to treat malignancies by the same way.However,if the limits of laparoscopy for benign diseases are mainly represented by technical issues,oncologic outcomes remain the foundation of any procedures to cure malignancies.Cancerous patients represent an important group with peculiar aspects including reduced survival expectancy,worsened quality of life due to surgery itself and adjuvant therapies,and challenging psychological impact.All these issues could,potentially,receive a better management with a laparoscopic surgical approach.In order to confirm such aspects,similarly to testing the newest weapons(surgical or pharmacologic)against cancer,long-term follow-up is always recommendable to assess the real benefits in terms of overall survival,cancer-free survival and quality of life.Furthermore,it seems of crucial importance that surgeons will be correctly trained in specific oncologic principles of surgical oncology as well as in modern miniinvasive technologies.Therefore,laparoscopic treatment of gastrointestinal malignancies requires more caution and deep analysis of published evidences,as compared to those achieved for inflammatory bowel diseases,gastroesophageal reflux disease or diverticular disease.This review tries to examine the evidence available to date for the use of laparoscopy and robotics in malignancies arising from the gastrointestinal district.展开更多
Chemical bond properties of YBa 2Cu 3O 7 were studied by using the average ba nd-gap model. The calculated results show that the covalency of Cu(1)-O bond i s 0.406, and one of Cu(2)-O is 0.276. Mssbauer isomer shi...Chemical bond properties of YBa 2Cu 3O 7 were studied by using the average ba nd-gap model. The calculated results show that the covalency of Cu(1)-O bond i s 0.406, and one of Cu(2)-O is 0.276. Mssbauer isomer shifts of 57Fe in Y-123 were calculated by the chemical surrounding factor h v defined b y covalency and electronic polarizability. The charge-state and site of Fe were determined. The relation between the coupling constant of electron-phonon inte raction and covalency is employed to explain that the Cu(2)-O plane is more im portant than the Cu(1)-O chain on the superconductivity in the Y-123 compound s.展开更多
Homogeneity of powder blend is essential to obtain uniform contents for the tablets and capsules.Near-infrared(NIR)spectroscopy with fiber-optic probe was used as an on-line technique for monitoring the homogeneity of...Homogeneity of powder blend is essential to obtain uniform contents for the tablets and capsules.Near-infrared(NIR)spectroscopy with fiber-optic probe was used as an on-line technique for monitoring the homogeneity of pharmaceutical blend during the blending process instead of the traditional techniques,such as high performance liquid chromatograph(HPLC)method.In this paper NIRS with a SabIR difuse reflectance fiber optic probe was used to monitor the blending process of coptis powder and lactose(excipient)with different contents,and further qualitative methods,like similarity,moving block of standard deviation and mean square were used for calculation purposes with the ollected spectra after the pretreatment of multiplicative signal correction(MSC)and second derivative.Correlation spectrum was used for the wavelength selection.Four different coptis were blended with lactose separately to validate the proposed method,and the blending process of "liu wei di huang"pill was also simulated in bottles to verify this method on multiple herbal blends.The overall results suggest that NIRS is a simple,efective and noninvasive technique can be sucssfuly applied to the determination of homogeneity in the herbal blend.展开更多
文摘In general,the treatment methods for esophageal achalasia are largely classified into four groups,including drug therapy using nitrite or a calcium channel blocker,botulinum toxin injection,endoscopic therapy such as endoscopic balloon dilation,and surgery. Various studies have suggested that the most effective treatment of esophageal achalasia is surgical therapy. The basic concept of this surgical therapy has not changed since Heller proposed esophageal myotomy for the purpose of resolution of lower esophageal obstruction for the first time in 1913,but the most common approach has changed from openchest surgery to laparoscopic surgery. Currently,the laparoscopic surgery has been the procedure of choice for the treatment of esophageal achalasia. During the process of the transition from open-chest surgery to laparotomy,to thoracoscopic surgery,and to laparoscopic surgery,the necessity of combining antireflux surgery has been recognized. There is some debate as to which type of antireflux surgery should be selected. The Toupet fundoplication may be the most effective in prevention of postoperative antireflux,but many medical institutions have selected the Dor fundoplication which covers the mucosal surface exposed by myotomy. Recently,a new endoscopic approach,peroral endoscopic myotomy(POEM),has received attention. Future studies should examine the long-term outcomes and whether POEM becomes the gold standard for the treatment of esophageal achalasia.
文摘After the rapid acceptance of laparoscopy to manage multiple benign diseases arising from gastrointestinal districts,some surgeons started to treat malignancies by the same way.However,if the limits of laparoscopy for benign diseases are mainly represented by technical issues,oncologic outcomes remain the foundation of any procedures to cure malignancies.Cancerous patients represent an important group with peculiar aspects including reduced survival expectancy,worsened quality of life due to surgery itself and adjuvant therapies,and challenging psychological impact.All these issues could,potentially,receive a better management with a laparoscopic surgical approach.In order to confirm such aspects,similarly to testing the newest weapons(surgical or pharmacologic)against cancer,long-term follow-up is always recommendable to assess the real benefits in terms of overall survival,cancer-free survival and quality of life.Furthermore,it seems of crucial importance that surgeons will be correctly trained in specific oncologic principles of surgical oncology as well as in modern miniinvasive technologies.Therefore,laparoscopic treatment of gastrointestinal malignancies requires more caution and deep analysis of published evidences,as compared to those achieved for inflammatory bowel diseases,gastroesophageal reflux disease or diverticular disease.This review tries to examine the evidence available to date for the use of laparoscopy and robotics in malignancies arising from the gastrointestinal district.
文摘Chemical bond properties of YBa 2Cu 3O 7 were studied by using the average ba nd-gap model. The calculated results show that the covalency of Cu(1)-O bond i s 0.406, and one of Cu(2)-O is 0.276. Mssbauer isomer shifts of 57Fe in Y-123 were calculated by the chemical surrounding factor h v defined b y covalency and electronic polarizability. The charge-state and site of Fe were determined. The relation between the coupling constant of electron-phonon inte raction and covalency is employed to explain that the Cu(2)-O plane is more im portant than the Cu(1)-O chain on the superconductivity in the Y-123 compound s.
基金support from China Postdoctoral Science Foundation Special Funded Project (2013T60604)Zhejiang Provincial Public Welfare Application Project of China (2012C21102)is gratefully acknowledged.
文摘Homogeneity of powder blend is essential to obtain uniform contents for the tablets and capsules.Near-infrared(NIR)spectroscopy with fiber-optic probe was used as an on-line technique for monitoring the homogeneity of pharmaceutical blend during the blending process instead of the traditional techniques,such as high performance liquid chromatograph(HPLC)method.In this paper NIRS with a SabIR difuse reflectance fiber optic probe was used to monitor the blending process of coptis powder and lactose(excipient)with different contents,and further qualitative methods,like similarity,moving block of standard deviation and mean square were used for calculation purposes with the ollected spectra after the pretreatment of multiplicative signal correction(MSC)and second derivative.Correlation spectrum was used for the wavelength selection.Four different coptis were blended with lactose separately to validate the proposed method,and the blending process of "liu wei di huang"pill was also simulated in bottles to verify this method on multiple herbal blends.The overall results suggest that NIRS is a simple,efective and noninvasive technique can be sucssfuly applied to the determination of homogeneity in the herbal blend.
