Background and Objectives: Establishing a stable pathway is the basis for interventional surgery, and hyper-selected intubation has become the basic requirement for vascular intervention therapy. Super-selection intub...Background and Objectives: Establishing a stable pathway is the basis for interventional surgery, and hyper-selected intubation has become the basic requirement for vascular intervention therapy. Super-selection intubation can not only significantly improve the efficacy of peripheral intervention treatment, but also greatly reduce surgical complications. However, during the treatment of peripheral vascular intervention (such as liver tumor arterial chemotherapy embolism, hemoptysis bronchial arterial embolism, gastrointestinal hemorrhagic gastrointestinal arterial embolism, etc.), vascular mutation is often large, and there are many branches, and the direction of blood flow is into the direction of blood flow, the horns are even reverse, and even the use of straight-headed microstructures will have difficulty interpolation difficulties or even failure, which increases the risk of surgery and affects safety treatment. To overcome this, pre-plasticized microcatheters have emerged, among which the InstantPass Swan-Neck Microstructure is a catheter with a head-end morphology similar to Cobra. Our research aims to explore the feasibility, safety, and technical advantages of the use of swan-neck microcatheter in peripheral vascular hyperboloid intubation. Materials and Methods: From January 2023 to March 2024, 31 patients with swan-neck microstructure were used in the peripheral vascular intervention therapy outside the hospital. Among them, there were 23 men and 8 women, aged 32 - 81 years old, an average (55 ± 13) years, and the average irradiation time was 35.1 ± 24.7 minutes. 10 cases of iodide oil arterial chemotherapy embolism, 7 cases of microspheres of hepatic arteries, 3 cases of gastric duodenal artery selective embolism, 3 cases of vein embolism with esophageal stomach, and 2 cases of sperm varicose vein embolism, 2 cases of selective embolism of the intestinal membrane, 2 cases of uterine arteries embolism, and 2 cases of renal arterial embolism. 11 of these patients switched to the swan-neck microstructure after using the straight-headed microstructure super-selective intubation. To analyze whether the swan-neck microcatheter is successfully transported to the target location, whether it can provide a satisfactory path for subsequent intravascular treatment, evaluate the surgery instant image results and complications related to the microstructure during the surgery period, analyze the angle of the target blood vessels and the main blood vessels, the target blood vessels, the target blood vessels, the relationship between the degree of pedestrian and the success rate of ultra-selective intubation, and summarize the indication of the application of the swan-neck microstructure in peripheral intervention therapy. Results: In this study, 31 patients used 31 swan-neck microcatheters, of which 22 (70.9%) target vascular and main blood vessels were ≤90˚;17 patients (54.8%) patients were curved and angulated;11 cases (35.5%) were after the failure of the superselective intubation of the straight-headed microstructure, the swan-neck microcatheter was successful after the failure;1 case (3.2%) patients with microstructure-related mezzanine occurred during surgery, and the complication rate of the perioperative ductation was 3.2%. All target lesions are finally successfully completed, and the success rate of surgical technology is 100%. Conclusion: Swan-neck microcatheters have a high success rate in superselective cannulation of peripheral blood vessels and perform well in vascular tortuosity and angulated lesions.展开更多
获取高分辨率的风场数据和气压场数据是精确模拟台风浪的基础,采用经验公式构建台风风场和气压场对海浪模式进行驱动,无法反映台风影响下海气动力过程,难以提供高精度的风场、气压场数据。本文基于中尺度大气模式WRF(Weather Research a...获取高分辨率的风场数据和气压场数据是精确模拟台风浪的基础,采用经验公式构建台风风场和气压场对海浪模式进行驱动,无法反映台风影响下海气动力过程,难以提供高精度的风场、气压场数据。本文基于中尺度大气模式WRF(Weather Research and Forecasting model)和第三代海浪模式SWAN(Simulating WAves Nearshore model),构建了南中国海地区大气—海浪实时双向耦合模式,针对超强台风"威马逊"进行数值模拟。将数值模拟结果与现场观测结果及卫星高度计观测结果进行对比验证,验证结果表明,本文建立的WRF-SWAN耦合模式在对台风"威马逊"影响下的南中国海台风浪的模拟中展现出较高的模拟精度,揭示了台风风场分布和台风浪分布在空间上的"右偏性"不对称分布特征及其形成机制。基于WRF和SWAN建立的大气-海浪实时双向耦合模式能够准确模拟台风动力过程以及台风浪的时空分布特征,可以推广用于南中国海地区台风浪的模拟分析。展开更多
Wave fields in Beibu Bay during Typhoon Damrey （2005） were simulated by SWAN wave model through inputting high resolution reanalysis wind fields data, current and water level data. Comparisons for wind input and wav...Wave fields in Beibu Bay during Typhoon Damrey （2005） were simulated by SWAN wave model through inputting high resolution reanalysis wind fields data, current and water level data. Comparisons for wind input and wave hindcast between observation and simulation show good consistency. Distributions of wave parameters such as wave height, wave period, wave length and wave direction under typhoon wind forcing were given. Also, the directional spectra related to the different position from the typhoon center were discussed. And at last, the variation and characteristics of observed frequency spectrum during the passage of Damrey were presented.展开更多
文摘Background and Objectives: Establishing a stable pathway is the basis for interventional surgery, and hyper-selected intubation has become the basic requirement for vascular intervention therapy. Super-selection intubation can not only significantly improve the efficacy of peripheral intervention treatment, but also greatly reduce surgical complications. However, during the treatment of peripheral vascular intervention (such as liver tumor arterial chemotherapy embolism, hemoptysis bronchial arterial embolism, gastrointestinal hemorrhagic gastrointestinal arterial embolism, etc.), vascular mutation is often large, and there are many branches, and the direction of blood flow is into the direction of blood flow, the horns are even reverse, and even the use of straight-headed microstructures will have difficulty interpolation difficulties or even failure, which increases the risk of surgery and affects safety treatment. To overcome this, pre-plasticized microcatheters have emerged, among which the InstantPass Swan-Neck Microstructure is a catheter with a head-end morphology similar to Cobra. Our research aims to explore the feasibility, safety, and technical advantages of the use of swan-neck microcatheter in peripheral vascular hyperboloid intubation. Materials and Methods: From January 2023 to March 2024, 31 patients with swan-neck microstructure were used in the peripheral vascular intervention therapy outside the hospital. Among them, there were 23 men and 8 women, aged 32 - 81 years old, an average (55 ± 13) years, and the average irradiation time was 35.1 ± 24.7 minutes. 10 cases of iodide oil arterial chemotherapy embolism, 7 cases of microspheres of hepatic arteries, 3 cases of gastric duodenal artery selective embolism, 3 cases of vein embolism with esophageal stomach, and 2 cases of sperm varicose vein embolism, 2 cases of selective embolism of the intestinal membrane, 2 cases of uterine arteries embolism, and 2 cases of renal arterial embolism. 11 of these patients switched to the swan-neck microstructure after using the straight-headed microstructure super-selective intubation. To analyze whether the swan-neck microcatheter is successfully transported to the target location, whether it can provide a satisfactory path for subsequent intravascular treatment, evaluate the surgery instant image results and complications related to the microstructure during the surgery period, analyze the angle of the target blood vessels and the main blood vessels, the target blood vessels, the target blood vessels, the relationship between the degree of pedestrian and the success rate of ultra-selective intubation, and summarize the indication of the application of the swan-neck microstructure in peripheral intervention therapy. Results: In this study, 31 patients used 31 swan-neck microcatheters, of which 22 (70.9%) target vascular and main blood vessels were ≤90˚;17 patients (54.8%) patients were curved and angulated;11 cases (35.5%) were after the failure of the superselective intubation of the straight-headed microstructure, the swan-neck microcatheter was successful after the failure;1 case (3.2%) patients with microstructure-related mezzanine occurred during surgery, and the complication rate of the perioperative ductation was 3.2%. All target lesions are finally successfully completed, and the success rate of surgical technology is 100%. Conclusion: Swan-neck microcatheters have a high success rate in superselective cannulation of peripheral blood vessels and perform well in vascular tortuosity and angulated lesions.
文摘获取高分辨率的风场数据和气压场数据是精确模拟台风浪的基础,采用经验公式构建台风风场和气压场对海浪模式进行驱动,无法反映台风影响下海气动力过程,难以提供高精度的风场、气压场数据。本文基于中尺度大气模式WRF(Weather Research and Forecasting model)和第三代海浪模式SWAN(Simulating WAves Nearshore model),构建了南中国海地区大气—海浪实时双向耦合模式,针对超强台风"威马逊"进行数值模拟。将数值模拟结果与现场观测结果及卫星高度计观测结果进行对比验证,验证结果表明,本文建立的WRF-SWAN耦合模式在对台风"威马逊"影响下的南中国海台风浪的模拟中展现出较高的模拟精度,揭示了台风风场分布和台风浪分布在空间上的"右偏性"不对称分布特征及其形成机制。基于WRF和SWAN建立的大气-海浪实时双向耦合模式能够准确模拟台风动力过程以及台风浪的时空分布特征,可以推广用于南中国海地区台风浪的模拟分析。
文摘Wave fields in Beibu Bay during Typhoon Damrey （2005） were simulated by SWAN wave model through inputting high resolution reanalysis wind fields data, current and water level data. Comparisons for wind input and wave hindcast between observation and simulation show good consistency. Distributions of wave parameters such as wave height, wave period, wave length and wave direction under typhoon wind forcing were given. Also, the directional spectra related to the different position from the typhoon center were discussed. And at last, the variation and characteristics of observed frequency spectrum during the passage of Damrey were presented.
