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Effect of valve leaflet surface patterning on valve hydrodynamic performance.
Wang, Aili; Wang, Yumiao; Liu, Wanbing; Liu, Li; Zhou, Jianye.
Afiliação
  • Wang A; State Key Laboratory of Cardiovascular Disease, FuWai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
  • Wang Y; State Key Laboratory of Cardiovascular Disease, FuWai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
  • Liu W; Beijing Star Medical Devices Co., Ltd., Beijing, PR China.
  • Liu L; Center for Medical Devices Testing, National Institutes for Food and Drug Control, Beijing, PR China.
  • Zhou J; State Key Laboratory of Cardiovascular Disease, FuWai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
Int J Artif Organs ; 46(10-11): 569-573, 2023.
Article em En | MEDLINE | ID: mdl-37698036
OBJECTIVE: We aimed to elucidate the effects of the micro-structure of the pyrolytic carbon for artificial heart valves on its hydrodynamic performance. METHODS: Bileaflet mechanical valves of GKS 23 and 29 A were randomly selected. According to ISO5840, mean transvalvular pressure (MPG), regurgitation fraction (RF), and effective orifice area (EOA) of valve were assessed. Then, parallel-groove pattern was constructed by laser etching on leaflet surface, and the valves were subjected again to the same test. RESULTS: Compared with before patterning at 2, 3.5, 5, and 7 L/min, the MPG of the valves in two specifications were higher, the EOA was larger in 23 A, but smaller in 29 A, and the RF was contrary to EOA. At 5 L/min, the RF in both specifications was lower after etching at 45 bpm. At 70 bpm however, the RF in 23 A decreased, in 29 A increased. CONCLUSION: The parallel-groove pattern on leaflet surface affected the hemodynamic performance of the valve prostheses.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bioprótese / Próteses Valvulares Cardíacas Idioma: En Revista: Int J Artif Organs Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Bioprótese / Próteses Valvulares Cardíacas Idioma: En Revista: Int J Artif Organs Ano de publicação: 2023 Tipo de documento: Article