RESUMO
BACKGROUND: After undergoing radical cystectomy combined with hysterectomy, female patients may suffer from pelvic organ prolapse due to the destruction of pelvic structures, which mainly manifests as the prolapse of tissues of the vulva to varying degrees and can be accompanied by symptoms, such as bleeding and inflammation. Once this complication is present, surgical intervention is needed to resolve it. Therefore, preventing and managing this complication is especially important. CASE SUMMARY: The postoperative occurrence of acute enterocele is rare, and a case of acute small bowel vaginosis 2 mo after radical cystectomy with hysterectomy is reported. When the patient was admitted, physical examination revealed that the small bowel was displaced approximately 20 cm because of vaginocele. A team of gynecological, general surgery, and urological surgeons was employed to return the small bowel and repair the lacerated vaginal wall during the emergency operation. Eventually, the patient recovered, and no recurrence was seen in the half year of follow-up. CONCLUSION: We review the surgical approach for such patients, analyze high-risk factors for the disease and suggest corresponding preventive measures.
RESUMO
Thin porous alumina sheets have been synthesized using a lysine-assisted hydrothermal approach resulting in an extraordinary catalyst support that can stabilize Au nanoparticles at annealing temperatures up to 900 °C. Remarkably, the unique architecture of such an alumina with thin sheets (average thickness ~15 nm and length 680 nm) and rough surface is beneficial to prevent gold nanoparticles from sintering. HRTEM observations clearly showed that the epitaxial growth between Au nanoparticles and alumina support was due to strong interfacial interactions, further explaining the high sinter-stability of the obtained Au/Al2O3 catalyst. Consequently, despite calcination at 700 °C, the catalyst maintains its gold nanoparticles of size predominantly 2 ± 0.8 nm. Surprisingly, catalyst annealed at 900 °C retained the highly dispersed small gold nanoparticles. It was also observed that a few gold particles (6-25 nm) were encapsulated by an alumina layer (thickness less than 1 nm) to minimize the surface energy, revealing a surface restructuring of the gold/support interface. As a typical and size-dependent reaction, CO oxidation is used to evaluate the performance of Au/Al2O3 catalysts. The results obtained demonstrated Au/Al2O3 catalyst calcined at 700 °C exhibited excellent activity with a complete CO conversion at â¼30 °C (T100% = 30 °C), and even after calcination at 900 °C, the catalyst still achieved its T50% at 158 °C. In sharp contrast, Au catalyst prepared using conventional alumina support shows almost no activity under the same preparation and catalytic test conditions.
