Application of plasma and ion beam technologies for the production of coatings on pacemaker electrodes

Capa

Citar

Texto integral

Acesso aberto Acesso aberto
Acesso é fechado Acesso está concedido
Acesso é fechado Somente assinantes

Resumo

Electrochemical characteristics of cathodes of pacemakers with TiN, Pt and Ir coatings, as well as cathodes with TiN coating implanted with Pt and Ir ions were studied. The best results were obtained by cathodes with Pt and Ir coatings. Ion implantation improves TiN coating, and brings its characteristics closer to those of Pt and Ir coatings.

Texto integral

Acesso é fechado

Sobre autores

O. Obrezkov

National Research Center “Kurchatov Institute”

Email: mifst04nmy@mail.ru
Rússia, Moscow, 123098

V. Bazylev

National Research Center “Kurchatov Institute”

Email: mifst04nmy@mail.ru
Rússia, Moscow, 123098

Yu. Martynenko

National Research Center “Kurchatov Institute”; National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: mifst04nmy@mail.ru
Rússia, Moscow, 123098; Moscow, 115409

M. Nagel

National Research Center “Kurchatov Institute”

Autor responsável pela correspondência
Email: mifst04nmy@mail.ru
Rússia, Moscow, 123098

Bibliografia

  1. Бокерия О.Л. Кардиостимуляция. М.: Большая российская энциклопедия, 2017.
  2. Schaldach M. Electrotherapy of the heart: technical aspects in cardiac pacing. Berlin: Springer- Verlag, 1992. 253 p.
  3. Двойной электрический слой. Физический энциклопедический словарь. М.: Советская энциклопедия, 1960.
  4. Дубровский И.А. // Мед. техника. 2010. № 4. С. 21; Dubrovskii I.A. // Biomed. Eng. 2010. V. 44. No. 4. P. 138.
  5. Thornton J.A. // Ann. Rev. Mater. Sci. 1977. V. 7. P. 239.
  6. Pospisil L., de Levie R. // Electroanalyt. Chem. 1969. V. 22. P. 227.
  7. Creager S.E., Wooster T.T. // Analyt. Chem. 1998. V. 70. P. 4257.
  8. ГОСТ 31582–2012. Электроды для электрокардиостимуляторов имплантируемые. Технические требования и методы испытаний.
  9. Tafel J. // Z. Phys. Chem. 1905. V. 50. P. 641.

Arquivos suplementares

Arquivos suplementares
Ação
1. JATS XML
Baixar
2. Fig. 1. Location of the pacemaker (left) and view of the implanted electrode (right).

Baixar (175KB)
Metadados
3. Fig. 2. Cardiac stimulation pulse shape.

Baixar (103KB)
Metadados
4. Fig. 3. Schematic diagram of the double electric layer.

Baixar (172KB)
Metadados
5. Fig. 4. Equivalent circuit of charge transfer through the DES. Rpl is the resistance of the external circuit, Rф(t) is the Faraday resistance, СГ(t) is the Helmholtz capacitance.

Baixar (33KB)
Metadados
6. Fig. 5. Scheme of the “Micromed” installation.

Baixar (145KB)
Metadados
7. Fig. 6. Surface of titanium nitride coating, the top layer of which was deposited at a temperature of 180°C and a gas pressure of 1.24 Pa. a – top view of the coating, b – side view

Baixar (311KB)
Metadados
8. Fig. 7. Electrochemical measurement scheme. 1 – sample (cathode), 2 – saline solution (NaCl 0.9%), 3 – anode.

Baixar (37KB)
Metadados
9. Fig. 8. Amplitude (a) and phase (b) frequency characteristics of an electrode with a platinum coating.

Baixar (280KB)
Metadados
10. Fig. 9. Voltage supplied to the electrode (lower curve) and current in the circuit (upper) depending on time (horizontal cell – 0.1 ms, vertical cell for voltage 0.3 V, for current 0.5 mA).

Baixar (148KB)
Metadados
11. Fig. 10. Dependence of the DEL capacitance on time for a 1 V pulse of 0.5 ms duration. The thick dark curve corresponds to the DEL charging process, the dotted curve to the discharging process, approximation of the I(t) dependence by polynomials. The thin solid curve: approximation of I(t) by exponential dependencies. The thick light curve: the error in determining C is less than 25%, regardless of the Faraday resistance value.

Baixar (69KB)
Metadados
12. Fig. 11. Dependence of the Faraday current If on the voltage in the DES for a 0.5 ms pulse with an amplitude of 1 V for a cathode with a platinum coating.

Baixar (58KB)
Metadados
13. Fig. 12. Dependence of voltage in the DES on time for pulses of different duration with an amplitude of 1 V.

Baixar (71KB)
Metadados
14. Fig. 13. Polarization of the DEL in relation to the harmonic voltage depending on the frequency f for samples with coatings: 1 – Ir(3), 2 – TiN+Pl*+Ir*, 3 – TiN+Au*, 4 – Ir(1.5), 5 – Pt, 6 – Ti N.

Baixar (78KB)
Metadados

Declaração de direitos autorais © Russian Academy of Sciences, 2024