AIM:To evaluate the Z-line visualization by the PillCamTM SB2 using three different ingestion protocols. METHODS:Ninety consecutive patients undergoing small bowel capsule endoscopy(SBCE)between January and May 2008 w...AIM:To evaluate the Z-line visualization by the PillCamTM SB2 using three different ingestion protocols. METHODS:Ninety consecutive patients undergoing small bowel capsule endoscopy(SBCE)between January and May 2008 were included in the study. They swallowed the capsule in the standing(Group A= 30),supine(Group B=30)and right supine positions (Group C=30).Baseline patient characteristics, difficulties in capsule ingestion,esophageal transit times(ETT)and Z-line visualization were noted. RESULTS:No significant differences were found between the groups with regard to baseline patient characteristics,ingestion difficulties and complete SB examinations(P>0.05).At least 1 frame of the Z-line was detected in 15.8%,46.7%and 90%of patients in groups A,B and C,respectively(P<0.001).The average number of Z-line images was 0.21±0.53,3.23 ±6.59 and 5.53±7.55 and the mean%of the Z-linedetected was 71.3,25.1 and 8.3,in groups A,B and C, respectively(both P<0.001).ETT times were longer in the supine group followed by the right supine and the standing groups(median of 237 s vs 64 s and 39 s, respectively;P<0.001). CONCLUSION:Z-line visualization in patients undergoing SBCE can be accurately achieved in most cases when the capsule is swallowed in the right supine position.展开更多
Transmission of oesophageal images may vary between different small-bowel capsule endoscopy models.A retrospective review of 100 examinations performed with 2 different Small-bowel capsule endoscopy(SBCE) systems(Pill...Transmission of oesophageal images may vary between different small-bowel capsule endoscopy models.A retrospective review of 100 examinations performed with 2 different Small-bowel capsule endoscopy(SBCE) systems(PillCam and MiroCam) was performed.The oral cavity/aero-digestive tract(i.e.,tongue,uvula and/or epiglottis) was captured/identified in almost all(99%) of PillCam videos but in none of MiroCam cases,P < 0.0001.Furthermore,oesophageal images(i.e.,from the upper oesophageal sphincter to the Z-line were captured in 99% of PillCam videos(mean ± SD,60.5 ± 334.1 frames,range:0-3329 frames) and in 66% of MiroCam cases(mean ± SD,11.1 ± 46.5 frames,range:0-382 frames),P < 0.0001.The Z-line was identified in 42% of PillCam videos and 17% of MiroCam,P = 0.0002.This information might be useful when performing SBCE in patients with high risks for aspiration.展开更多
介绍了一种用于丝阵Z箍缩(Z-pinch)内爆实验研究的脉冲放电模块的设计。模块基于直线型变压器驱动器(LTD)技术,包含34个放电支路,通过4个铁基非晶磁芯耦合。每支路由2个40nF电容器和1只4间隙串联气体开关组成,回路电感为220nH。设计了...介绍了一种用于丝阵Z箍缩(Z-pinch)内爆实验研究的脉冲放电模块的设计。模块基于直线型变压器驱动器(LTD)技术,包含34个放电支路,通过4个铁基非晶磁芯耦合。每支路由2个40nF电容器和1只4间隙串联气体开关组成,回路电感为220nH。设计了水电阻负载检验模块输出性能,在匹配状态下,负载上的输出电流峰值916 k A,上升时间99.8 ns。设计了磁绝缘传输线将输出脉冲传输至Z-pinch丝阵负载,并利用"零维模型"对LTD模块和负载的耦合放电进行了模拟计算。结果显示,丝阵负载上的放电电流峰值可达960 k A,上升时间为114 ns。展开更多
文摘AIM:To evaluate the Z-line visualization by the PillCamTM SB2 using three different ingestion protocols. METHODS:Ninety consecutive patients undergoing small bowel capsule endoscopy(SBCE)between January and May 2008 were included in the study. They swallowed the capsule in the standing(Group A= 30),supine(Group B=30)and right supine positions (Group C=30).Baseline patient characteristics, difficulties in capsule ingestion,esophageal transit times(ETT)and Z-line visualization were noted. RESULTS:No significant differences were found between the groups with regard to baseline patient characteristics,ingestion difficulties and complete SB examinations(P>0.05).At least 1 frame of the Z-line was detected in 15.8%,46.7%and 90%of patients in groups A,B and C,respectively(P<0.001).The average number of Z-line images was 0.21±0.53,3.23 ±6.59 and 5.53±7.55 and the mean%of the Z-linedetected was 71.3,25.1 and 8.3,in groups A,B and C, respectively(both P<0.001).ETT times were longer in the supine group followed by the right supine and the standing groups(median of 237 s vs 64 s and 39 s, respectively;P<0.001). CONCLUSION:Z-line visualization in patients undergoing SBCE can be accurately achieved in most cases when the capsule is swallowed in the right supine position.
文摘Transmission of oesophageal images may vary between different small-bowel capsule endoscopy models.A retrospective review of 100 examinations performed with 2 different Small-bowel capsule endoscopy(SBCE) systems(PillCam and MiroCam) was performed.The oral cavity/aero-digestive tract(i.e.,tongue,uvula and/or epiglottis) was captured/identified in almost all(99%) of PillCam videos but in none of MiroCam cases,P < 0.0001.Furthermore,oesophageal images(i.e.,from the upper oesophageal sphincter to the Z-line were captured in 99% of PillCam videos(mean ± SD,60.5 ± 334.1 frames,range:0-3329 frames) and in 66% of MiroCam cases(mean ± SD,11.1 ± 46.5 frames,range:0-382 frames),P < 0.0001.The Z-line was identified in 42% of PillCam videos and 17% of MiroCam,P = 0.0002.This information might be useful when performing SBCE in patients with high risks for aspiration.
文摘介绍了一种用于丝阵Z箍缩(Z-pinch)内爆实验研究的脉冲放电模块的设计。模块基于直线型变压器驱动器(LTD)技术,包含34个放电支路,通过4个铁基非晶磁芯耦合。每支路由2个40nF电容器和1只4间隙串联气体开关组成,回路电感为220nH。设计了水电阻负载检验模块输出性能,在匹配状态下,负载上的输出电流峰值916 k A,上升时间99.8 ns。设计了磁绝缘传输线将输出脉冲传输至Z-pinch丝阵负载,并利用"零维模型"对LTD模块和负载的耦合放电进行了模拟计算。结果显示,丝阵负载上的放电电流峰值可达960 k A,上升时间为114 ns。
