Iryou kikigaku (The Japanese journal of medical instrumentation)
Online ISSN : 1884-054X
Print ISSN : 1882-4978
ISSN-L : 1882-4978
Volume 84 , Issue 1
Showing 1-12 articles out of 12 articles from the selected issue
Original Contribution
  • Masatoshi Watanabe, Keisuke Kato, Hideo Yamamoto
    2014 Volume 84 Issue 1 Pages 3-8
    Published: 2014
    Released: March 26, 2014
    Here we present a case of emergency breakdown of the general anesthesia ventilator, which took place after one hour of usage although an inspection by medical device information communicators (MDIC) of both the medical manufactured company and the hospital was performed before using according to the guideline “Inspection sheet of anesthesia ventilator before starting” by Japan Society of Anesthesiology. The trouble was caused by falling out of motor brush in ventilator, then several times of information exchange between the hospital MDIC and the company MDIC led to the improvement of the same anesthesia ventilators as a troubled one. Questionnaires for company stuffs in charge of medical information (n=20) revealed that the acquisition rate of MDIC certification was extremely low and its recognition was also very subtle. MDIC is so important system to ensure the post-marketing security of medical instruments that we should let medical company stuffs know MDIC system and suggest them to get MDIC certification. Authors recommend that medical companies in both production and distribution should endeavor to let MDIC be a standard system like as medical representatives (MR) in pharmaceutical companies.
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  • Masafumi Morita, Masahito Miki, Kazuhiro Doi, Kazuhiro Hara
    2014 Volume 84 Issue 1 Pages 9-17
    Published: 2014
    Released: March 26, 2014
    Skin tissue can be regarded as a solid-liquid biphasic visco-elastic porous material constructed by with the blood flowing in tissues as the liquid phase and collagen fibers as the solid phase.
    As skin tissues are consolidated by percutaneous pressure, it is important to quantitatively study the relationship between decline in porosity and blood circulation disorder. Consolidation of tissues due to creep deformation of rabbit ears and subsequent changes in blood flow were measured.
    Blood flow compliance CS inside tissues is expressed as an exponential function of porosity P as CS=345.3P-2.68 (correlation coefficient R2=0.999), and it came to light that blood flood inside tissues rapidly decline under the percutaneous pressure of 20 mm Hg or more.
    In order to give a high level of safety and biocompatibility to the prosthetic socket, it is necessary to ensure that adequate blood flows to the skin tissue of the amputated limb, where the socket is mounted.
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  • Manabu Chikai, Hitoshi Miyake
    2014 Volume 84 Issue 1 Pages 18-22
    Published: 2014
    Released: March 26, 2014
    Almost children with developmental disorder have symptoms of hypoesthesia and/or hyperesthesia. Touch sensation disorder is focused on this study. DSM-IV-TR and/or DSM-V are not enough to be able to diagnose them as a case of hypoesthesia and/or hyperesthesia. Furthermore, they refuse to touch other person, e.g. family or friends, and objects, because they dislike the pain-like sense, e.g. tickle, itch or sore. The purpose of this study was to develop a new haptic performance diagnostic device for children with developmental disorder. This device was constructed of the pressure sensor, of the two peltier devices and of the speaker. This device was able to present complex senses, e.g. titillate, itch and sore. Twelve human volunteers (ten men and two women) were instructed to put their three-finger’s tips on the device, and they orally answered the pre-defined haptic cognition senses. The results showed that the device was able to present the tickle, itch or sore by human fingers, and/or wrist, and/or elbow. That is, this device could present their dislike senses by a quantitative way. Furthermore, this study is on going to the therapeutic application in the future.
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Short Report
Review / Risk Management of Medical Devices and Risk Communication about Medical Devices