Pub Date : 2020-01-25DOI: 10.3760/CMA.J.ISSN.1001-4497.2020.01.003
Zhentian Cui, Yongshun Gao
Objective To analysis and summarize the experience of surgical treatment of deep sternal infection caused by residual epicardial pacing. Methods Retrospective analysis of 78 patients with deep incision infection due to residual epicardial pacing lead after heart disease were selected from the Seventh Medical Center of PLA General Hospital from May 2014 to December 2018. Including 47 males and 31 females, aged 3-72 years old. 38 patients with heart valve surgery(including 18 cases with aortic valvuloplasty, 9 cases with aortic valve replacement, 11 cases with double valve replacement), 14 cases with coronary artery bypass grafting, 26 cases with congenital heart disease surgery(10 cases with atrial septal defect repairment, 11 cases with ventricular septal defect repairment, 5 cases with complex malformation surgery). All patients were infected with sternal incision due to incomplete extraction of the cardiac pacing lead, and treated with the muscle flap turnover operation. The treatment time was 1-5 years after the cardiac surgery in 32 cases, and 46 cases in 1 year. Results There was no death in the study. 70 cases were cured in stageⅠ, 5 cases in stageⅡ, and 3 cases were cured after re-operation. 71 cases were followed up for 1 year, there was no recurrence of wound infection. Conclusion The operation of pectoralis major muscle flap turnover has opened up a new approach for the treatment of thoracic incision infection caused by residual epicardial pacing lead after cardiac surgery, and it is worth popularizing in clinical practice. Key words: Cardiac surgical procedure; Deep sternal infection; Pectoralis major muscle flap inversion plasty
{"title":"Surgical treatment of deep sternotomy infection caused by residual pacing lead: 78 cases analysis","authors":"Zhentian Cui, Yongshun Gao","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.003","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.003","url":null,"abstract":"Objective \u0000To analysis and summarize the experience of surgical treatment of deep sternal infection caused by residual epicardial pacing. \u0000 \u0000 \u0000Methods \u0000Retrospective analysis of 78 patients with deep incision infection due to residual epicardial pacing lead after heart disease were selected from the Seventh Medical Center of PLA General Hospital from May 2014 to December 2018. Including 47 males and 31 females, aged 3-72 years old. 38 patients with heart valve surgery(including 18 cases with aortic valvuloplasty, 9 cases with aortic valve replacement, 11 cases with double valve replacement), 14 cases with coronary artery bypass grafting, 26 cases with congenital heart disease surgery(10 cases with atrial septal defect repairment, 11 cases with ventricular septal defect repairment, 5 cases with complex malformation surgery). All patients were infected with sternal incision due to incomplete extraction of the cardiac pacing lead, and treated with the muscle flap turnover operation. The treatment time was 1-5 years after the cardiac surgery in 32 cases, and 46 cases in 1 year. \u0000 \u0000 \u0000Results \u0000There was no death in the study. 70 cases were cured in stageⅠ, 5 cases in stageⅡ, and 3 cases were cured after re-operation. 71 cases were followed up for 1 year, there was no recurrence of wound infection. \u0000 \u0000 \u0000Conclusion \u0000The operation of pectoralis major muscle flap turnover has opened up a new approach for the treatment of thoracic incision infection caused by residual epicardial pacing lead after cardiac surgery, and it is worth popularizing in clinical practice. \u0000 \u0000 \u0000Key words: \u0000Cardiac surgical procedure; Deep sternal infection; Pectoralis major muscle flap inversion plasty","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"4 1","pages":"10-12"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87523828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of valve-in-valve in transcatheter mitral valve replacement","authors":"Z. Xiaohua, Chen Huang, Gongcheng Huang, Ma Guofeng, Fan Feng, Yue Wang, Jing Xu","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.011","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.011","url":null,"abstract":"经导管二尖瓣置换术被公认是治疗高龄高危主动脉瓣疾病的有效方法。我们采用国产J-Valve瓣膜，应用瓣中瓣技术成功救治2例二尖瓣生物瓣衰败的患者。手术效果满意，术后患者二尖瓣反流消失，未见瓣周漏，左心室舒张期末内径缩小，三尖瓣反流量显著减少，心功能明显改善。在二尖瓣生物瓣衰败外科手术高危的患者中，采用国产J-Valve瓣膜行瓣中瓣技术，不失为一种不错的选择，其长期效果尚需要大宗的病例研究。","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"37 1","pages":"43-45"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90691517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-25DOI: 10.3760/CMA.J.ISSN.1001-4497.2020.01.001
Ji Xianchao, Bo Peng, Li Li, Ju Zhao, Shoujun Li, Fuxia Yan, Jinping Liu, Xu Wang, Jun Yan, Qiang Wang
Objective To investigate the clinical outcomes of selective major aortopulmonary collaterals(MAPCAs) unifocalization and report histopathological findings in patients with pulmonary atresia with ventricular septal defect and major aortopulmonary collaterals(PA/VSD/ MAPCAs). Methods The study enrolled 6 MAPCAs/VSD/PA patients with age ranged from 6 to 96 months and body weight ranged from 5.0 to 23.0 kg. These patients underwent selective MAPCAs unifocalization and primary repairs. Preoperative cardiac catheter, selective arteriography, cardiac CTA and intraoperative pathology were performed to identify different function, anatomic distribution and histopathology of MAPCAs. Results 6 MAPCAs/VSD/PA patients underwent selective MAPCAs unifocalization and primary repair. No death occurred after operation and at follow-up which lasted for 1 to 20 months. Preoperative cardiac catheter, selective arteriography and intraoperative histopathology demonstrated distribution of functional MAPCAs similar to native pulmonary artery arborization and participating in arterial gas exchange. Functional MAPCAs were classified into elastic arteries according to histopathology. Conclusion There are two histological type of MAPCAs which play different roles. Selective unifocalization to functional MAPCAs which are classified into elastic arteries like native pulmonary artery is a safe and effective treatment approach for PA/VSD/MAPCAs. Key words: Pulmonary atresia; Major aortopulmonary collaterals; Selective unifocalization; Histopathology; Elastic arteries
{"title":"The research of selective unifocalization in patients with pulmonary atresia with ventricular septal defect and major aortopulmonary collaterals and recognition of major aortopulmonary collaterals from the perspective of histopathology","authors":"Ji Xianchao, Bo Peng, Li Li, Ju Zhao, Shoujun Li, Fuxia Yan, Jinping Liu, Xu Wang, Jun Yan, Qiang Wang","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.001","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.001","url":null,"abstract":"Objective \u0000To investigate the clinical outcomes of selective major aortopulmonary collaterals(MAPCAs) unifocalization and report histopathological findings in patients with pulmonary atresia with ventricular septal defect and major aortopulmonary collaterals(PA/VSD/ MAPCAs). \u0000 \u0000 \u0000Methods \u0000The study enrolled 6 MAPCAs/VSD/PA patients with age ranged from 6 to 96 months and body weight ranged from 5.0 to 23.0 kg. These patients underwent selective MAPCAs unifocalization and primary repairs. Preoperative cardiac catheter, selective arteriography, cardiac CTA and intraoperative pathology were performed to identify different function, anatomic distribution and histopathology of MAPCAs. \u0000 \u0000 \u0000Results \u00006 MAPCAs/VSD/PA patients underwent selective MAPCAs unifocalization and primary repair. No death occurred after operation and at follow-up which lasted for 1 to 20 months. Preoperative cardiac catheter, selective arteriography and intraoperative histopathology demonstrated distribution of functional MAPCAs similar to native pulmonary artery arborization and participating in arterial gas exchange. Functional MAPCAs were classified into elastic arteries according to histopathology. \u0000 \u0000 \u0000Conclusion \u0000There are two histological type of MAPCAs which play different roles. Selective unifocalization to functional MAPCAs which are classified into elastic arteries like native pulmonary artery is a safe and effective treatment approach for PA/VSD/MAPCAs. \u0000 \u0000 \u0000Key words: \u0000Pulmonary atresia; Major aortopulmonary collaterals; Selective unifocalization; Histopathology; Elastic arteries","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"2 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87410799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-25DOI: 10.3760/CMA.J.ISSN.1001-4497.2020.01.006
Shaowei Xin, Tao Wang, Xiangbing Xin, Yongchao Han
Objective To identify the risk factors of failed observational treatment of traumatic hemothorax. Methods Clinical data of traumatic hemothorax combined with observational treatment were selected from the data of chest trauma cases admitted to the thoracic surgery department from January 2012 to December 2018. The treatment effect was analyzed, and the risk factors of failed observational treatment were analyzed by multivariate analysis. Results The total failure rate of observational treatment was 59.26%(32/54), and the details of hemothorax volume, length of stay in hospital, pneumothorax and patients with more than 3 rib fractures in the failed conservative treatment group were more than those in the successful treatment group(P<0.05). Independent risk factors of failed observational treatment were more than 3 rib fractures(OR=5.535, 95%CI: 1.065-28.754, P=0.042)and pneumothorax(OR=9.529, 95%CI: 1.988-45.580, P=0.005). Conclusion Pneumothorax and more than 3 rib fractures are the independent risk factors of failed observational treatment, and should be included in the observational treatment decision of traumatic hemothorax. Key words: Hemothorax; Thoracic trauma; Rib fracture
{"title":"Risk factors of failed observational treatment of traumatic hemothorax","authors":"Shaowei Xin, Tao Wang, Xiangbing Xin, Yongchao Han","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.006","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.006","url":null,"abstract":"Objective \u0000To identify the risk factors of failed observational treatment of traumatic hemothorax. \u0000 \u0000 \u0000Methods \u0000Clinical data of traumatic hemothorax combined with observational treatment were selected from the data of chest trauma cases admitted to the thoracic surgery department from January 2012 to December 2018. The treatment effect was analyzed, and the risk factors of failed observational treatment were analyzed by multivariate analysis. \u0000 \u0000 \u0000Results \u0000The total failure rate of observational treatment was 59.26%(32/54), and the details of hemothorax volume, length of stay in hospital, pneumothorax and patients with more than 3 rib fractures in the failed conservative treatment group were more than those in the successful treatment group(P<0.05). Independent risk factors of failed observational treatment were more than 3 rib fractures(OR=5.535, 95%CI: 1.065-28.754, P=0.042)and pneumothorax(OR=9.529, 95%CI: 1.988-45.580, P=0.005). \u0000 \u0000 \u0000Conclusion \u0000Pneumothorax and more than 3 rib fractures are the independent risk factors of failed observational treatment, and should be included in the observational treatment decision of traumatic hemothorax. \u0000 \u0000 \u0000Key words: \u0000Hemothorax; Thoracic trauma; Rib fracture","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"20 1","pages":"22-25"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82624087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-25DOI: 10.3760/CMA.J.ISSN.1001-4497.2020.01.013
Hai Tang, H. Su, Chang Chen
Abstract Pulmonary segmentectomy refers to the anatomic resection of lung parenchyma, which isolates bronchopulmonary from terminal bronchus to hilum after cutting the pulmonary artery, vein, and bronchus. It has been applied in the treatment of primary lung cancer, metastatic lung cancer, and other benign lesions because of the surgical techniques, such as lesion localization and recognition of the intersegmental plane. The pulmonary function of patients after pulmonary segmentectomy has been decreased to different degrees due to various factors, which may ultimately determine the overall prognosis and postoperative quality of life. This review will conclude the main techniques of pulmonary segmentectomy and its effect on lung function.
{"title":"The main techniques of pulmonary segmentectomy and its effect on pulmonary function","authors":"Hai Tang, H. Su, Chang Chen","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.013","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.013","url":null,"abstract":"Abstract Pulmonary segmentectomy refers to the anatomic resection of lung parenchyma, which isolates bronchopulmonary from terminal bronchus to hilum after cutting the pulmonary artery, vein, and bronchus. It has been applied in the treatment of primary lung cancer, metastatic lung cancer, and other benign lesions because of the surgical techniques, such as lesion localization and recognition of the intersegmental plane. The pulmonary function of patients after pulmonary segmentectomy has been decreased to different degrees due to various factors, which may ultimately determine the overall prognosis and postoperative quality of life. This review will conclude the main techniques of pulmonary segmentectomy and its effect on lung function.","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"32 1","pages":"48-53"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90198745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-25DOI: 10.3760/CMA.J.ISSN.1001-4497.2020.01.014
Yunfeng Yi
Explosion injury is caused by high-speed fragments and primary shock wave produced by explosion, which directly acts on the body. Explosion injury is often seen in the explosion of war, high-pressure boiler, liquefied gas tank or chemical storage tank, etc. It has the characteristics of sudden, batch, complex and changeable injury. Chest injury is one of the most common injuries caused by explosion, especially severe and concealed lung injury, which shows light external but heavy internal, and the injury develops rapidly. In this paper, the mechanism, epidemiological classification, clinical manifestations, imaging examinations of pulmonary explosive injury were introduced in detail, and the early treatment strategy of pulmonary explosive injury in hospital was emphasized.
{"title":"Early in-hospital management strategy for patients with blast injury of the lungs","authors":"Yunfeng Yi","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.014","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.014","url":null,"abstract":"Explosion injury is caused by high-speed fragments and primary shock wave produced by explosion, which directly acts on the body. Explosion injury is often seen in the explosion of war, high-pressure boiler, liquefied gas tank or chemical storage tank, etc. It has the characteristics of sudden, batch, complex and changeable injury. Chest injury is one of the most common injuries caused by explosion, especially severe and concealed lung injury, which shows light external but heavy internal, and the injury develops rapidly. In this paper, the mechanism, epidemiological classification, clinical manifestations, imaging examinations of pulmonary explosive injury were introduced in detail, and the early treatment strategy of pulmonary explosive injury in hospital was emphasized.","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"10 2","pages":"54-58"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72583355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-25DOI: 10.3760/CMA.J.ISSN.1001-4497.2020.01.004
Baiyu Tian, Jie Han, Yan Li, Yuqing Jiao, Xu Meng
Objective Mitral valve replacement is more frequently performed in elder patients with rheumatic valve diseases. Mitral valve repair may be feasible in young patients with suitable anatomy in rheumatic mitral valve disease, but still controversial in elder patients. Our study was to compare mitral repair to bioprosthetic replacement in patients aged 60 years or older. Methods Eighty two patients(age ≥60 years) underwent mitral valve surgery(mitral repair or bioprosthetic replacement)in our single institution from January 2014 to January 2016 were reviewed, including 25 cases of repair(MVP) and 57 cases of bioprosthetic replacement(MVR). 5 years follow-up oganalysis. Results Mean age in MVP and MVR was 64.43 years and 67.28 years, respectively. There were no statistically differences in extracorporeal circulation time(P=0.99) and aorta blocking time(P=0.88); the operative mortality rate in MVR was 5.3% while none in MVP(P=0.24). During follow-up 6 deaths happened in MVR, 4 of them died from MACE while the other 2 died from other causes. There was no death in MVP(P=0.17). No redo or other complications were found during follow-up. Conclusion In patients aged 60 years or older with rheumatic mitral valve disease, mitral repair is associated with a same perioperative and mid-term result compared with bioprosthetic replacement. Rheumatic mitral valves could be repaired in elderly patients. Key words: Mitral valve insafficiency; Mitral valve repair; Bioprosthesis; Elderly
{"title":"Mitral repair or bioprosthetic replacement for rheumatic valve drseascs in elderly patients","authors":"Baiyu Tian, Jie Han, Yan Li, Yuqing Jiao, Xu Meng","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.004","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.004","url":null,"abstract":"Objective \u0000Mitral valve replacement is more frequently performed in elder patients with rheumatic valve diseases. Mitral valve repair may be feasible in young patients with suitable anatomy in rheumatic mitral valve disease, but still controversial in elder patients. Our study was to compare mitral repair to bioprosthetic replacement in patients aged 60 years or older. \u0000 \u0000 \u0000Methods \u0000Eighty two patients(age ≥60 years) underwent mitral valve surgery(mitral repair or bioprosthetic replacement)in our single institution from January 2014 to January 2016 were reviewed, including 25 cases of repair(MVP) and 57 cases of bioprosthetic replacement(MVR). 5 years follow-up oganalysis. \u0000 \u0000 \u0000Results \u0000Mean age in MVP and MVR was 64.43 years and 67.28 years, respectively. There were no statistically differences in extracorporeal circulation time(P=0.99) and aorta blocking time(P=0.88); the operative mortality rate in MVR was 5.3% while none in MVP(P=0.24). During follow-up 6 deaths happened in MVR, 4 of them died from MACE while the other 2 died from other causes. There was no death in MVP(P=0.17). No redo or other complications were found during follow-up. \u0000 \u0000 \u0000Conclusion \u0000In patients aged 60 years or older with rheumatic mitral valve disease, mitral repair is associated with a same perioperative and mid-term result compared with bioprosthetic replacement. Rheumatic mitral valves could be repaired in elderly patients. \u0000 \u0000 \u0000Key words: \u0000Mitral valve insafficiency; Mitral valve repair; Bioprosthesis; Elderly","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"21 1","pages":"13-16"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83192724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objective To detect the hemodynamic mechanism of the novel endovascular stent on complicated abdominal aortic aneurysms by Computational Fluid Dynamics(CFD) firstly, and then compare the effect of the novel endovascular stent and the streamliner multilayer flow modulator(SMFM) stent. Methods All medical images were obtained by computed tomography. A semiautomatic segmentation protocol within Mimics(v17.0; Materialise, Leuven, Belgium) was used to extract the threedimensional aortic aneurysms. The stents was generated numerically and fitted along the aortic aneurysms. The lumen volume represented the fluid domain that was discretised in smaller volumes, which defined a mesh within the ICEM software(Ansys ICEM CFD v15.0). Hemodynamic analysis was performed with software Fluent 16.0. Results Both kinds of stents can change the pattern of flow distribution. Compared with SMFM, the novel endovascular stent can significantly reduce the flow velocity in aneurysms, the shear force and the pressure on the aneurysms wall.What’s more, the flow velocity of the branch artery was accelerated by the novel endovascular stent. Conclusion The novel endovascular stent can significantly reduce the flow velocity in aneurysms, the shear force and the pressure on the aneurysms wall, and acceleratethe the flow velocity of the branch artery. Key words: Aortic aneurysms; Computational fluid dynamics; Streamliner multilayer flow modulator; Novel endovascular stent
{"title":"The study of hemodynamic mechanism of a novel endovascular stent on complicated abdominal aortic aneurysms","authors":"Baotong Li, Yuechao Zhao, Hansong Sun, Shanglin Chen","doi":"10.3760/CMA.J.ISSN.1001-4497.2020.01.007","DOIUrl":"https://doi.org/10.3760/CMA.J.ISSN.1001-4497.2020.01.007","url":null,"abstract":"Objective To detect the hemodynamic mechanism of the novel endovascular stent on complicated abdominal aortic aneurysms by Computational Fluid Dynamics(CFD) firstly, and then compare the effect of the novel endovascular stent and the streamliner multilayer flow modulator(SMFM) stent. Methods All medical images were obtained by computed tomography. A semiautomatic segmentation protocol within Mimics(v17.0; Materialise, Leuven, Belgium) was used to extract the threedimensional aortic aneurysms. The stents was generated numerically and fitted along the aortic aneurysms. The lumen volume represented the fluid domain that was discretised in smaller volumes, which defined a mesh within the ICEM software(Ansys ICEM CFD v15.0). Hemodynamic analysis was performed with software Fluent 16.0. Results Both kinds of stents can change the pattern of flow distribution. Compared with SMFM, the novel endovascular stent can significantly reduce the flow velocity in aneurysms, the shear force and the pressure on the aneurysms wall.What’s more, the flow velocity of the branch artery was accelerated by the novel endovascular stent. Conclusion The novel endovascular stent can significantly reduce the flow velocity in aneurysms, the shear force and the pressure on the aneurysms wall, and acceleratethe the flow velocity of the branch artery. Key words: Aortic aneurysms; Computational fluid dynamics; Streamliner multilayer flow modulator; Novel endovascular stent","PeriodicalId":10181,"journal":{"name":"Chinese Journal of Thoracic and Cardiovaescular Surgery","volume":"8 1","pages":"26-30"},"PeriodicalIF":0.0,"publicationDate":"2020-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88688609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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