Investigating the functionality of diamond-like carbon films on an artificial heart diaphragm
Autor: | Katsuya Tsuchimoto, Satoshi Takada, Toshinobu Miyamatsu, Akihiko Homma, Eisuke Tatsumi, Kenji Hirakuri, Yasuharu Ohgoe, Gernot Friedbacher, Tomoyuki Saitou, Yasuhiro Fukui, Yoshiyuki Taenaka |
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Rok vydání: | 2003 |
Předmět: |
congenital
hereditary and neonatal diseases and abnormalities Silicon Materials science Diamond-like carbon Spectrophotometry Infrared Scanning electron microscope Surface Properties Biomedical Engineering Biophysics chemistry.chemical_element Bioengineering Diaphragm (mechanical device) Heart Artificial engineering.material In Vitro Techniques Biomaterials Diffusion chemistry.chemical_compound Coating Coated Materials Biocompatible hemic and lymphatic diseases parasitic diseases Humans Composite material Diamond Membranes Artificial General Medicine Equipment Design Silicone oil Carbon body regions Carbon film chemistry Pulsatile Flow engineering Oils |
Zdroj: | ASAIO journal (American Society for Artificial Internal Organs : 1992). 49(6) |
ISSN: | 1058-2916 |
Popis: | In this study, the authors used diamond-like carbon film to coat the ellipsoidal diaphragm (polyurethane elastomer) of artificial hearts. The purpose of such coatings is to prevent the penetration of hydraulic silicone oil and blood through the diaphragm. To attach diamond-like carbon film uniformly on the diaphragm, the authors developed a special electrode. In estimating the uniformity of the diamond-like carbon film, the thickness was measured using a scanning electron microscope, and the characteristics of the diamond-like carbon film was investigated using infrared spectroscopy, Ar-laser Raman spectrophotometer, and x-ray photoelectron spectrometer. Also, to estimate the penetration of silicone oil through the diaphragm, in vitro testing was operated by alternating the pressure of silicone oil for 20 days. The authors were able to successfully attach uniform deposition of diamond-like carbon film on the ellipsoidal diaphragm. In this in vitro test, diamond-like carbon film was proven to have good stability. The amount of silicone oil penetration was improved by one-third using the diamond-like carbon film coating compared with an uncoated diaphragm. It is expected that through the use of the diamond-like carbon film, the dynamic compatibility of an artificial heart diaphragm will increase. |
Databáze: | OpenAIRE |
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