Venous complications in patients with acute pancreatitis typically occur as a form of splenic,portal,or superior mesenteric vein thrombosis and have been detected more frequently in recent reports.Although a well-orga...Venous complications in patients with acute pancreatitis typically occur as a form of splenic,portal,or superior mesenteric vein thrombosis and have been detected more frequently in recent reports.Although a well-organized protocol for the treatment of venous thrombosis has not been established,anticoagulation therapy is commonly recommended.A 73-year-old man was diagnosed with acute progressive portal vein thrombosis associated with acute pancreatitis.After one month of anticoagulation therapy,the patient developed severe hematemesis.With endoscopy and an abdominal computed tomography scan,hemorrhages in the pancreatic pseudocyst,which was ruptured into the duodenal bulb,were confirmed.After conservative treatment,the patient was stabilized.While the rupture of a pseudocyst into the surrounding viscera is a well-known phenomenon,spontaneous rupture into the duodenum is rare.Moreover,no reports of upper gastrointestinal bleeding caused by pseudocyst rupture in patients under anticoagulation therapy for venous thrombosis associated with acute pancreatitis have been published.Herein,we report a unique case of massive upper gastrointestinal bleeding due to pancreatic pseudocyst rupture into the duodenum,which developed during anticoagulation therapy for portal vein thrombosis associated with acute pancreatitis.展开更多
Since the 1990s, the large-scale migrant labor force from rural to urban areas has made great contributions to the growth in China. However, migration does not come without costs. The potential impacts of parental mig...Since the 1990s, the large-scale migrant labor force from rural to urban areas has made great contributions to the growth in China. However, migration does not come without costs. The potential impacts of parental migration on the left-behind children have aroused wide concerns. Based on a two-wave panel dataset of nearly 10 thousand students in 166 schools from 13 counties in 5 provinces between 2014 and 2015, differences-in-differences （DID） and propensity score matching plus DID （PSMDID） approaches were used to examine the changes in academic performances before and after the parental out-migration. The results indicated that the mother only migration has a significant negative impact on the a- cademic performances of left-behind children, and it was especially true when the mother only migration lasted more than a semester. For left-behind children whose parents were out or only the father was out, their academic performances were not affected.展开更多
For the number of complete shock curves of a conservation law with one space variable,Hopf in 1950 for the Burger equation,and Oleinik in 1956 for the general,stated that it is at most countable.In 1979,the present au...For the number of complete shock curves of a conservation law with one space variable,Hopf in 1950 for the Burger equation,and Oleinik in 1956 for the general,stated that it is at most countable.In 1979,the present author published an example to show that the statement of Hopf and Oleinik is wrong.But after so long time,the wrong statement for countability still appeared in some publications,which is at least partly due to that some ones felt difficult to understand Hopf and Oleinik’s proofs being wrong.So,pointing out where they went wrong becomes very necessary.展开更多
文摘Venous complications in patients with acute pancreatitis typically occur as a form of splenic,portal,or superior mesenteric vein thrombosis and have been detected more frequently in recent reports.Although a well-organized protocol for the treatment of venous thrombosis has not been established,anticoagulation therapy is commonly recommended.A 73-year-old man was diagnosed with acute progressive portal vein thrombosis associated with acute pancreatitis.After one month of anticoagulation therapy,the patient developed severe hematemesis.With endoscopy and an abdominal computed tomography scan,hemorrhages in the pancreatic pseudocyst,which was ruptured into the duodenal bulb,were confirmed.After conservative treatment,the patient was stabilized.While the rupture of a pseudocyst into the surrounding viscera is a well-known phenomenon,spontaneous rupture into the duodenum is rare.Moreover,no reports of upper gastrointestinal bleeding caused by pseudocyst rupture in patients under anticoagulation therapy for venous thrombosis associated with acute pancreatitis have been published.Herein,we report a unique case of massive upper gastrointestinal bleeding due to pancreatic pseudocyst rupture into the duodenum,which developed during anticoagulation therapy for portal vein thrombosis associated with acute pancreatitis.
文摘Since the 1990s, the large-scale migrant labor force from rural to urban areas has made great contributions to the growth in China. However, migration does not come without costs. The potential impacts of parental migration on the left-behind children have aroused wide concerns. Based on a two-wave panel dataset of nearly 10 thousand students in 166 schools from 13 counties in 5 provinces between 2014 and 2015, differences-in-differences （DID） and propensity score matching plus DID （PSMDID） approaches were used to examine the changes in academic performances before and after the parental out-migration. The results indicated that the mother only migration has a significant negative impact on the a- cademic performances of left-behind children, and it was especially true when the mother only migration lasted more than a semester. For left-behind children whose parents were out or only the father was out, their academic performances were not affected.
基金partially supported by National Basic Research Program of China (Grant No.2011CB302400)National Natural Science Foundation of China (Grant No. 10771206)
文摘For the number of complete shock curves of a conservation law with one space variable,Hopf in 1950 for the Burger equation,and Oleinik in 1956 for the general,stated that it is at most countable.In 1979,the present author published an example to show that the statement of Hopf and Oleinik is wrong.But after so long time,the wrong statement for countability still appeared in some publications,which is at least partly due to that some ones felt difficult to understand Hopf and Oleinik’s proofs being wrong.So,pointing out where they went wrong becomes very necessary.
