背景常规支气管镜诊断技术对于肺周围型病变诊断具有一定局限性,联合径向探头支气管内超声可以显著提高诊断率,临床上也将其作为早期肺癌诊断的重要工具。目的通过动物实验以及离体猪肺实验评价自主研发的医用径向探头支气管内超声检查...背景常规支气管镜诊断技术对于肺周围型病变诊断具有一定局限性,联合径向探头支气管内超声可以显著提高诊断率,临床上也将其作为早期肺癌诊断的重要工具。目的通过动物实验以及离体猪肺实验评价自主研发的医用径向探头支气管内超声检查的可行性、操作性能和安全性。方法广西巴马小型猪8只,由4名具有5年呼吸内镜操作经验的医师先后应用自主研发的径向探头支气管内超声(实验组)和奥林巴斯公司的UM-S20-17S型径向探头支气管内超声(对照组)对每只巴马型小猪进行检查,采用自身对照方法,根据掷硬币法随机决定对同一只巴马型小猪进行两种支气管内超声检查的先后顺序,检查后采用量化评分法评价两种支气管内超声的操作性能及安全性。应用8个离体猪肺,分离离体猪肺局部肺段以下支气管,在分离的肺段支气管旁植入食用果冻模拟建立的体外肿瘤模型,采用自身对照方法,应用自主研发的VsonicPro2017C型径向探头支气管内超声(实验组)和奥林巴斯公司的UM-S20-17S型支气管内超声(对照组)对肿瘤模型进行检查,应用量化评分法评价两种支气管内超声对肿瘤模型的分辨能力和肿瘤回声特征判定能力。结果与主机连接是否方便(7.56±0.21 vs 7.84±0.18)、插入活检孔道的难易程度(7.47±0.26 vs 7.94±0.13)、超声插入活检孔道后是否可以正常工作(7.53±0.22 vs7.84±0.34)、图像采集和储存(7.53±0.12 vs 7.94±0.18)、图像质量是否符合质量要求评分(7.38±0.24 vs 7.69±0.17)方面,两组差异均无统计学意义(P均>0.05)。两组肿瘤分辨能力(7.66±0.22 vs 7.84±0.21)、肿瘤回声特征判定能力评分(7.63±0.28 vs7.84±0.51)亦无统计学差异(P均>0.05)。两组均无相关并发症。结论自主研发的径向探头支气管内超声(VsonicPro2017C)操作安全、可行、简便,能清晰观察支气管旁病变特征,其操作性能和采集图像质量良好,具有良好应用前景。展开更多
This paper presents a new design of a probe adjusting device intended to position pressure and temperature probes in a flow field. 5-hole, 3-hole and temperature probes can be moved in radial direction and freely rota...This paper presents a new design of a probe adjusting device intended to position pressure and temperature probes in a flow field. 5-hole, 3-hole and temperature probes can be moved in radial direction and freely rotated about their axis. The high actuation accuracy of 3.9 ktm in radial direction and 0.09~ in angular position is validated in a 2-stage-turbine test rig which is installed at the Institute of Power Plant Technology, Steam and Gas Turbines, RWTH Aachen University. To meet the challenge to calculate the efficiency of a turbo machine which is mainly influenced by the temperature, all probe adjusting devices are positioned simultaneously and controlled by the MAS (measuring acquisition system) so that the same radial position in each stage is measured at the same time. For this purpose a new program has been developed to synchronize actuation and measurement. The slim design of 60 mm width allows measurement between the stages of turbo machines with small axial distances between vane and blade. In addition a CFD/FEA shows how the design and combination of materials compensate the thermal expansion of the engine during operation. This allows a minimal safety distance of 0.2 mm between rotor and probe to enable measurement as close to the physical boundary as possible. The actuation accuracy is demonstrated with pressure, temperature and angle distribution plots. It is also shown that the resolution of the measuring points, and therefore the actuation distances, has a large impact on the flow field analysis and should be set as high as possible. However the measuring time has to be taken into account.展开更多
文摘背景常规支气管镜诊断技术对于肺周围型病变诊断具有一定局限性,联合径向探头支气管内超声可以显著提高诊断率,临床上也将其作为早期肺癌诊断的重要工具。目的通过动物实验以及离体猪肺实验评价自主研发的医用径向探头支气管内超声检查的可行性、操作性能和安全性。方法广西巴马小型猪8只,由4名具有5年呼吸内镜操作经验的医师先后应用自主研发的径向探头支气管内超声(实验组)和奥林巴斯公司的UM-S20-17S型径向探头支气管内超声(对照组)对每只巴马型小猪进行检查,采用自身对照方法,根据掷硬币法随机决定对同一只巴马型小猪进行两种支气管内超声检查的先后顺序,检查后采用量化评分法评价两种支气管内超声的操作性能及安全性。应用8个离体猪肺,分离离体猪肺局部肺段以下支气管,在分离的肺段支气管旁植入食用果冻模拟建立的体外肿瘤模型,采用自身对照方法,应用自主研发的VsonicPro2017C型径向探头支气管内超声(实验组)和奥林巴斯公司的UM-S20-17S型支气管内超声(对照组)对肿瘤模型进行检查,应用量化评分法评价两种支气管内超声对肿瘤模型的分辨能力和肿瘤回声特征判定能力。结果与主机连接是否方便(7.56±0.21 vs 7.84±0.18)、插入活检孔道的难易程度(7.47±0.26 vs 7.94±0.13)、超声插入活检孔道后是否可以正常工作(7.53±0.22 vs7.84±0.34)、图像采集和储存(7.53±0.12 vs 7.94±0.18)、图像质量是否符合质量要求评分(7.38±0.24 vs 7.69±0.17)方面,两组差异均无统计学意义(P均>0.05)。两组肿瘤分辨能力(7.66±0.22 vs 7.84±0.21)、肿瘤回声特征判定能力评分(7.63±0.28 vs7.84±0.51)亦无统计学差异(P均>0.05)。两组均无相关并发症。结论自主研发的径向探头支气管内超声(VsonicPro2017C)操作安全、可行、简便,能清晰观察支气管旁病变特征,其操作性能和采集图像质量良好,具有良好应用前景。
文摘This paper presents a new design of a probe adjusting device intended to position pressure and temperature probes in a flow field. 5-hole, 3-hole and temperature probes can be moved in radial direction and freely rotated about their axis. The high actuation accuracy of 3.9 ktm in radial direction and 0.09~ in angular position is validated in a 2-stage-turbine test rig which is installed at the Institute of Power Plant Technology, Steam and Gas Turbines, RWTH Aachen University. To meet the challenge to calculate the efficiency of a turbo machine which is mainly influenced by the temperature, all probe adjusting devices are positioned simultaneously and controlled by the MAS (measuring acquisition system) so that the same radial position in each stage is measured at the same time. For this purpose a new program has been developed to synchronize actuation and measurement. The slim design of 60 mm width allows measurement between the stages of turbo machines with small axial distances between vane and blade. In addition a CFD/FEA shows how the design and combination of materials compensate the thermal expansion of the engine during operation. This allows a minimal safety distance of 0.2 mm between rotor and probe to enable measurement as close to the physical boundary as possible. The actuation accuracy is demonstrated with pressure, temperature and angle distribution plots. It is also shown that the resolution of the measuring points, and therefore the actuation distances, has a large impact on the flow field analysis and should be set as high as possible. However the measuring time has to be taken into account.