AIM:To compare fluoroscopic, endoscopic and guide wire assistance with ultraslim gastroscopy for placement of nasojejunal feeding tubes. METHODS:The information regarding nasojejunal tube placement procedures was retr...AIM:To compare fluoroscopic, endoscopic and guide wire assistance with ultraslim gastroscopy for placement of nasojejunal feeding tubes. METHODS:The information regarding nasojejunal tube placement procedures was retrieved using the gastrointestinal tract database at Tongji Hospital affiliated to Tongji Medical College. Records from 81 patients who underwent nasojejunal tubes placement by different techniques between 2004 and 2011 were reviewed for procedure success and tube-related outcomes. RESULTS:Nasojejunal feeding tubes were successfully placed in 78 (96.3%) of 81 patients. The success rate by fluoroscopy was 92% (23 of 25), by endoscopic technique 96.3% (26 of 27), and by guide wire assistance (whether via transnasal or transoral insertion)100% (23/23, 6/6). The average time for successful placement was 14.9 ± 2.9 min for fluoroscopic placement, 14.8 ± 4.9 min for endoscopic placement, 11.1 ± 2.2 min for guide wire assistance with transnasal gastroscopic placement, and 14.7 ± 1.2 min for transoral gastroscopic placement. Statistically, the duration for the third method was significantly different (P < 0.05) compared with the other three methods. Transnasal placement over a guidewire was significantly faster (P < 0.05) than any of the other approaches. CONCLUSION:Guide wire assistance with transnasal insertion of nasojejunal feeding tubes represents a safe, quick and effective method for providing enteral nutrition.展开更多
The forming process of the bodil y fault in doped W wire was observed by SEM and TEM. The forming kinetics was de scibed by the perturbing theory. The interaction among the bodily fault and the dislocation or the grai...The forming process of the bodil y fault in doped W wire was observed by SEM and TEM. The forming kinetics was de scibed by the perturbing theory. The interaction among the bodily fault and the dislocation or the grain boundary was also observed. The strengthen effect cause d by the interaction is counted initially by each submitted probable models. The results show that the strengthening mechanism at middle and high temperature is different.展开更多
为了探讨催化剂与脉冲放电等离子体共同作用来处理恶臭气体的效果,采用V2O5/γ-Al2O3催化剂与脉冲放电等离子体共同作用来处理了恶臭气体甲硫醚,并探讨了反应中催化剂与脉冲放电等离子体的协同性及工艺参数对降解反应的影响。实验结果表...为了探讨催化剂与脉冲放电等离子体共同作用来处理恶臭气体的效果,采用V2O5/γ-Al2O3催化剂与脉冲放电等离子体共同作用来处理了恶臭气体甲硫醚,并探讨了反应中催化剂与脉冲放电等离子体的协同性及工艺参数对降解反应的影响。实验结果表明:电晕放电具有改变催化剂气-固相吸附平衡、减少吸附容量的作用,处理恶臭气体时可通过添加催化剂吸附-气体浓缩环节来提高降解反应的能量利用率;催化剂与脉冲放电等离子体共同作用比单一脉冲放电等离子具有更高的甲硫醚去除率,同时催化剂的填充通过改变介电性及电场强度使反应获得更大的能量,催化剂颗粒表面发生的强烈放电促进了降解反应的进行;在一定电压范围内,通过提高峰值电压、增加气体停留时间可有效提高甲硫醚去除率;当峰值电压为22 k V、甲硫醚体积分数为315×10-6、体积流量为550 m L/min时,甲硫醚去除率可达84.12%。催化剂协同脉冲放电等离子体能够有效处理恶臭气体甲硫醚。展开更多
文摘AIM:To compare fluoroscopic, endoscopic and guide wire assistance with ultraslim gastroscopy for placement of nasojejunal feeding tubes. METHODS:The information regarding nasojejunal tube placement procedures was retrieved using the gastrointestinal tract database at Tongji Hospital affiliated to Tongji Medical College. Records from 81 patients who underwent nasojejunal tubes placement by different techniques between 2004 and 2011 were reviewed for procedure success and tube-related outcomes. RESULTS:Nasojejunal feeding tubes were successfully placed in 78 (96.3%) of 81 patients. The success rate by fluoroscopy was 92% (23 of 25), by endoscopic technique 96.3% (26 of 27), and by guide wire assistance (whether via transnasal or transoral insertion)100% (23/23, 6/6). The average time for successful placement was 14.9 ± 2.9 min for fluoroscopic placement, 14.8 ± 4.9 min for endoscopic placement, 11.1 ± 2.2 min for guide wire assistance with transnasal gastroscopic placement, and 14.7 ± 1.2 min for transoral gastroscopic placement. Statistically, the duration for the third method was significantly different (P < 0.05) compared with the other three methods. Transnasal placement over a guidewire was significantly faster (P < 0.05) than any of the other approaches. CONCLUSION:Guide wire assistance with transnasal insertion of nasojejunal feeding tubes represents a safe, quick and effective method for providing enteral nutrition.
文摘The forming process of the bodil y fault in doped W wire was observed by SEM and TEM. The forming kinetics was de scibed by the perturbing theory. The interaction among the bodily fault and the dislocation or the grain boundary was also observed. The strengthen effect cause d by the interaction is counted initially by each submitted probable models. The results show that the strengthening mechanism at middle and high temperature is different.
文摘为了探讨催化剂与脉冲放电等离子体共同作用来处理恶臭气体的效果,采用V2O5/γ-Al2O3催化剂与脉冲放电等离子体共同作用来处理了恶臭气体甲硫醚,并探讨了反应中催化剂与脉冲放电等离子体的协同性及工艺参数对降解反应的影响。实验结果表明:电晕放电具有改变催化剂气-固相吸附平衡、减少吸附容量的作用,处理恶臭气体时可通过添加催化剂吸附-气体浓缩环节来提高降解反应的能量利用率;催化剂与脉冲放电等离子体共同作用比单一脉冲放电等离子具有更高的甲硫醚去除率,同时催化剂的填充通过改变介电性及电场强度使反应获得更大的能量,催化剂颗粒表面发生的强烈放电促进了降解反应的进行;在一定电压范围内,通过提高峰值电压、增加气体停留时间可有效提高甲硫醚去除率;当峰值电压为22 k V、甲硫醚体积分数为315×10-6、体积流量为550 m L/min时,甲硫醚去除率可达84.12%。催化剂协同脉冲放电等离子体能够有效处理恶臭气体甲硫醚。
