AIM: Intrabiliary rupture (IBR) is a common and serious compli-cation of hepatic hydatid cyst. The incidence varies from 1% to 25%. The treatment of IBR is still controversial. We aimed to design an algorithm for the ...AIM: Intrabiliary rupture (IBR) is a common and serious compli-cation of hepatic hydatid cyst. The incidence varies from 1% to 25%. The treatment of IBR is still controversial. We aimed to design an algorithm for the treatment of hepatic hydatidosis with IBR by reviewing our cases.METHODS: Eight cases of IBR were analyzed retrospectively.Patients were evaluated according to age, sex, clinical findings, cyst number and stage, abdominal ultrasonography and CT-scan, surgical methods, complica-tions, results and coincidental diseases.RESULTS: Female/male ratio was 1/7. Mean age was 52.12±18.26 years (range 24-69 years). Right upper quadrant pain, flatulence, palpable hepatic mass were symptoms common in all patients. Cholestatic jaundice was found in four cases. In all patients, cyst evacuation and omento-plasty were performed, followed by either choledochod-uodenostomy, T-tube drainage, intracavitary suturing of the orifice, two cases in each. Whereas in two patients diagnosed post-operatively percutaneous drainage of biliary collection or ERCP and sphincteroplasty were added. Morbidity and hospital stay were higher in these cases.CONCLUSION: When the diagnosis of IBR can be done pre-or intra-operatively, morbidity decreases. If a biliary fistula is seen post-operatively, endoscopic procedures such as ERCP, sphincteroplasty or nasobiliary drainage can be applied.展开更多
A numerical study of the crushing of thin-walled circular aluminum tubes has been carried out to investigate the crashworthiness behaviors under axial impact loading. These kinds of tubes are usually used in automobil...A numerical study of the crushing of thin-walled circular aluminum tubes has been carried out to investigate the crashworthiness behaviors under axial impact loading. These kinds of tubes are usually used in automobile and train structures to absorb the impact energy. Previous researches show that thin-walled circular tube has the highest energy absorption under axial impact amongst different structures. In this work, the crushing between two rigid flat plates and the tube rupture by 4 and 6 blades cutting tools is modeled with the help of ductile failure criterion using the numerical method. The tube material is aluminum EN AW-7108 T6 and its length and diameter are 300 mm and 50 ram, respectively. Using the artificial neural network （ANN）, the most important surfaces of energy absorption parameters, including the maximum displacement of the striker, the maximum axial force, the specific energy absorption and the crushing force efficiency in terms of impact velocity and tube thickness are obtained and compared to each other. The analyses show that the tube rupture by the 6 blades cutting tool has more energy absorption in comparison with others. Furthermore, the results demonstrate that tube cutting with the help of multi-blades cutting tools is more stable, controllable and predictable than tube folding.展开更多
Ceramic capillary membrane has received much attention due to its relatively high pack density and favorable mechanical strength.However,it is difficult to prepare capillary membrane on its thin support by a dip-coati...Ceramic capillary membrane has received much attention due to its relatively high pack density and favorable mechanical strength.However,it is difficult to prepare capillary membrane on its thin support by a dip-coating method.In this study,alumina microfiltration membranes were prepared on the inner surface of alumina capillary support(outer diameter 4 mm,inner diameter 2.5 mm)by a dip-coating method.Scanning electron microscopy(SEM)observation,gas bubble pressure(GBP)method and membrane permeation test were carried out to evaluate membrane performance.Two major effects in preparation of crack-free membrane,capillary filtration and film-coating,upon the thin support were studied.The as-prepared crack-free membrane presents a narrow pore size distribution,a mean pore size of about 0.6μm and a high pure water flux of 86000 L·m -2 ·h -1 ·MPa.It is proved that the membrane thickness should be sufficiently large to overcome the defects of support surface,but it is only one of the prerequisites for the formation of crack-free membrane.Furthermore,it is demonstrated that the capillary filtration effect is greatly restricted for thin capillary support with the dip-coating method and the film-coating effect plays a crucial role in the formation of crack-free membrane.展开更多
文摘AIM: Intrabiliary rupture (IBR) is a common and serious compli-cation of hepatic hydatid cyst. The incidence varies from 1% to 25%. The treatment of IBR is still controversial. We aimed to design an algorithm for the treatment of hepatic hydatidosis with IBR by reviewing our cases.METHODS: Eight cases of IBR were analyzed retrospectively.Patients were evaluated according to age, sex, clinical findings, cyst number and stage, abdominal ultrasonography and CT-scan, surgical methods, complica-tions, results and coincidental diseases.RESULTS: Female/male ratio was 1/7. Mean age was 52.12±18.26 years (range 24-69 years). Right upper quadrant pain, flatulence, palpable hepatic mass were symptoms common in all patients. Cholestatic jaundice was found in four cases. In all patients, cyst evacuation and omento-plasty were performed, followed by either choledochod-uodenostomy, T-tube drainage, intracavitary suturing of the orifice, two cases in each. Whereas in two patients diagnosed post-operatively percutaneous drainage of biliary collection or ERCP and sphincteroplasty were added. Morbidity and hospital stay were higher in these cases.CONCLUSION: When the diagnosis of IBR can be done pre-or intra-operatively, morbidity decreases. If a biliary fistula is seen post-operatively, endoscopic procedures such as ERCP, sphincteroplasty or nasobiliary drainage can be applied.
文摘A numerical study of the crushing of thin-walled circular aluminum tubes has been carried out to investigate the crashworthiness behaviors under axial impact loading. These kinds of tubes are usually used in automobile and train structures to absorb the impact energy. Previous researches show that thin-walled circular tube has the highest energy absorption under axial impact amongst different structures. In this work, the crushing between two rigid flat plates and the tube rupture by 4 and 6 blades cutting tools is modeled with the help of ductile failure criterion using the numerical method. The tube material is aluminum EN AW-7108 T6 and its length and diameter are 300 mm and 50 ram, respectively. Using the artificial neural network （ANN）, the most important surfaces of energy absorption parameters, including the maximum displacement of the striker, the maximum axial force, the specific energy absorption and the crushing force efficiency in terms of impact velocity and tube thickness are obtained and compared to each other. The analyses show that the tube rupture by the 6 blades cutting tool has more energy absorption in comparison with others. Furthermore, the results demonstrate that tube cutting with the help of multi-blades cutting tools is more stable, controllable and predictable than tube folding.
基金Supported by the National High Technology Research and Development Program of China （2007AA030303）, the National Basic Research Program of China （2009CB623400） and the National Natural Science Foundation of China （20776067）.
文摘Ceramic capillary membrane has received much attention due to its relatively high pack density and favorable mechanical strength.However,it is difficult to prepare capillary membrane on its thin support by a dip-coating method.In this study,alumina microfiltration membranes were prepared on the inner surface of alumina capillary support(outer diameter 4 mm,inner diameter 2.5 mm)by a dip-coating method.Scanning electron microscopy(SEM)observation,gas bubble pressure(GBP)method and membrane permeation test were carried out to evaluate membrane performance.Two major effects in preparation of crack-free membrane,capillary filtration and film-coating,upon the thin support were studied.The as-prepared crack-free membrane presents a narrow pore size distribution,a mean pore size of about 0.6μm and a high pure water flux of 86000 L·m -2 ·h -1 ·MPa.It is proved that the membrane thickness should be sufficiently large to overcome the defects of support surface,but it is only one of the prerequisites for the formation of crack-free membrane.Furthermore,it is demonstrated that the capillary filtration effect is greatly restricted for thin capillary support with the dip-coating method and the film-coating effect plays a crucial role in the formation of crack-free membrane.
