Acute phlegmonous gastritis complicated by delayed perforation

Here,we report on a case of acute phlegmonous gastritis(PG)complicated by delayed perforation.A51-year-old woman presented with severe abdominal pain and septic shock symptoms.A computed tomography scan showed diffuse thickening of the gastric wall and distention with peritoneal fluid.Although we did not find definite evidence of free air on the computed tomography(CT)scan,the patient’s clinical condition suggested diffuse peritonitis requiring surgical intervention.Exploratory laparotomy revealed a thickened gastric wall with suppurative intraperitoneal fluid in which Streptococcus pyogenes grew.There was no evidence of gastric or duodenal perforation.No further operation was performed at that time.The patient was conservatively treated with antibiotics and proton pump inhibitor,and her condition improved.However,she experienced abdominal and flank pain again on postoperative day 10.CT and esophagogastroduodenoscopy showed a large gastric ulcer with perforation.Unfortunately,although the CT showed further improvement in the thickening of the stomach and the mucosal defect,the patient’s condition did not recover until a week later,and an esophagogastroduodenoscopy taken on postoperative day 30 showed suspected gastric submucosal dissection.We performed total gastrectomy as a second operation,and the patient recovered without major complications.A pathological examination revealed a multifocal ulceration and necrosis from the mucosa to the serosa with perforation.

Synaptic Transistor Implemented Using Quasi-2D Molybdenum Oxide

Recent years has seen increasing interest in building artificial synaptic devices to emulate the computation performed by biological synapses.Biological synapses are functional links between neurons,through which information is transmitted in the neuron network.The information can be stored and processed simultaneously in the same synapse through tuning synaptic weight,which is defined as the strength of the correlation between

Multiferroics and magnetoelectric effects in charge ordered compounds

The coexistence of magnetic ordering and ferroelectricity,known as multiferroics,has drawn a lot of research effort.Depending on the origin of ferroelectricity,multiferroic materials can be classified into different groups.In this paper,we review recent progress in the field of multiferroics induced by different forms of charge ordering.In addition to a general description of charge order and electronic ferroelectricity,we focus on two specific systems:(1) charge order with frustration in RFe2O4(R=Lu,Yb) system;(2) charge ordered perovskite manganites of the type(R1xCax)MnO 3(R=La,Pr).The charge ordering can be tuned by external electric fields,which results in pronounced magnetoelectric effects and strong dielectric tunability.Other materials and possible candidates with charge order induced multiferroics are also briefly summarized.