脱気水による超音波洗浄力の増強について

概要

論文の詳細を見る
Ultrasonic cleaning devices are in widespread use for washing various instruments contaminated with blood or other body fluids. Tap water commonly employed as a medium in washing by sonication contains, at ordinary temperature, oxygen and nitrogen gasses at approximate concentrations of 8 and 14g/m^3, respectively. These dissolved gasses are known to cause ultrasound attenuation and scattering. This study was conducted to compare ultrasonic cleaning efficiency with tap water versus deaerated water, with the results demonstrating an improved effect with the latter sonication medium. Higher sound pressure levels and lesser ultrasound damping to the water surface were observed in deaerated water, compared with tap water. In addition, a cleaning effect with the use of deaerated water was evident even for the nut regions of scissors and hemostatic forceps which have been generally thought to be difficult to thoroughly clean in tap water medium. The present data indicate potential usefulness of deaerated water as a noticeably effective means for devising a more efficient ultrasonic cleaning system, despite the difficulty in handling of this medium into which a gradual dissolution of atmospheric gasses takes place on standing.
日本医療機器学会の論文
2001-09-01