A Simplified Cleaning Method of a Bronchoscope to Prevent Atypical Mycobacterial Contamination. Especially Concerning the Usefulness of Brushing.

DOI Open Access
  • Hiraoka Hitoshi
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Iwata Shogo
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Saitoh Gengo
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Okuyama Suguru
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Kiriyama Yuji
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Kubota Mika
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Nagao Kohsyu
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Uchiyama Teruo
    Department of Respiratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Kobori Ichino
    Department of Laboratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine
  • Mori Mikio
    Department of Laboratory Medicine, Koshigaya Hospital Dokkyo University School of Medicine

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Other Title
  • 内視鏡の汚染対策　気管支鏡の非定型抗酸菌汚染に対する簡易洗浄法について　特にブラッシングの有用性について
  • Especially Concerning the Usefulness of Brushing
  • 特にブラツシングの有用性について

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Description

The mycobacterial contamination of a bronchoscope has been a problem. At our institution, there was several cases of such contamination. Atypical mycobacterial contamination of tap water could not prevent by installation of 0.2μm filter system in the case of intermittent use of water. The highest contamination was found in the connection tube between filter systems. During the course of our trial to prevent atypical mycobacterial contamination, we recognized the importance of brushing. Using artificial sputum, we studied a simplified cleaning method for the bronchoscope. For the first step of cleaning a bronchoscope, we must physically wash it. For washing it, it is necessary to brush every part of the device 10 or more times. We test-produced a simplified cleaning device which uses 1.0kg/cm2 water pressure and benzalkonium chloride. It can be semi-automatically washed and it is useful because it is labor-saving. Because of its structure, suction valves were easily contaminated. Therefore, it needs to be carefully brushed, cleaned, and sterilized. The endoscope automatic washer (Olympus EW-10) is not perfect. The concentration of glutaraldehyde in EW-10 system decreased from 2 to 1.1% during one week. It is necessary to take care in having the user clean it by himself.

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