A New Transcutaneous Bidirectional Communication for Monitoring Implanted Artificial Heart Using the Human Body as a Conductive Medium

Eiji Okamoto, Yoshikuni Kato, Kazuyuki Seino, Hidekazu Miura, Yasuyuki Shiraishi, Tomoyuki Yambe, Yoshinori Mitamura

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A transcutaneous communication system (TCS) is a key technology for monitoring and controlling artificial hearts and other artificial organs in the body. In this study, we developed a new TCS that uses the human body as a conductive medium. Direct data exchange provides a higher level of communication security compared to that of wireless methods without physical constraints such as an external wire. The external and internal units of the new TCS each consist mainly of a data transmitter and a data receiver. The data transmitter has an amplitude shift keying (ASK) modulator (carrier frequencies: 4 and 10MHz) and an electrode. The ASK-modulated data current is led into the body through the electrode, and it flows back to the energy source through the body, the data receiver, and the earth ground that includes all conductors and dielectrics in the environment that are in close proximity to the patient. Performance of the TCS was evaluated by a communication test on the surface of the human body and in an animal experiment using a goat. The TCS was able to transmit data concurrently for 4 weeks between everywhere on the surface of the body and everywhere inside the body under full-duplex communication at a transmission rate of 115kbps. The power consumption of each TCS unit was 125mW with an ASK-modulated current of 7mA (root-mean-square). While further study is required to secure its safety, the newly developed TCS has promise to be a next-generation transcutaneous communication device.

Original languageEnglish
Pages (from-to)852-858
Number of pages7
JournalArtificial Organs
Volume36
Issue number10
DOIs
Publication statusPublished - 2012 Oct 1

Keywords

  • Artificial heart
  • Intrabody communication
  • Monitoring
  • Transcutaneous communication
  • Ventricular assist device

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

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