Development of a bidirectional transcutaneous optical data transmission system for artificial hearts allowing long-distance data communication with low electric power consumption

Eiji Okamoto, Yoshiro Yamamoto, Yusuke Inoue, Tsutomu Makino, Yoshinori Mitamura

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We have developed a wavelength division bidirectional transcutaneous optical data transmission system using amplitude shift keying (ASK) modulation. The bidirectional optical data transmission system consists of two kinds of light emitting diodes (LEDs) having different wavelengths and an ASK modulator and demodulator. Two narrow directional visible LEDs with a peak output wavelength of 590∈nm were used to transmit data from inside the body to outside the body, and a narrow directional near-infrared LED with a peak output wavelength of 940∈nm was used for transmission from outside the body to inside the body. The ASK modulator employs a carrier pulse signal (50∈kHz) to support a maximum data transmission rate of 9600∈bps. An in vitro experiment showed that the maximum tissue thickness of near-infrared optical data transmission without error was 45∈mm; the figure was 20∈mm for visible optical data transmission. There was no interference between the signals under full-duplex data transmission. Electric power consumption for the data transmission links was 122∈mW for near-infrared light and 162∈mW (81∈mW × 2) for visible light. From the above results, a bidirectional transcutaneous optical data transmission system promises adequate performance for monitoring and control of an artificial heart.

Original languageEnglish
Pages (from-to)149-153
Number of pages5
JournalJournal of Artificial Organs
Volume8
Issue number3
DOIs
Publication statusPublished - 2005 Sep 1
Externally publishedYes

Keywords

  • Artificial heart
  • LVAD
  • Monitoring
  • Optical transmission
  • Transcutaneous

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering
  • Cardiology and Cardiovascular Medicine

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