Experimental studies of the potential contamination of needleless connectors and I-system<sup>®</sup>

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  • Inoue Yoshifumi
    Division of Nutrition and Medical Engineering, Center for Advanced Medical Engineering and Informatics, Osaka University
  • Inoue Hiroyuki
    Division of Nutrition and Medical Engineering, Center for Advanced Medical Engineering and Informatics, Osaka University
  • Sumi Ryoko
    Division of Nutrition and Medical Engineering, Center for Advanced Medical Engineering and Informatics, Osaka University

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Other Title
  • ニードルレスコネクターおよび I-system<sup>®</sup>における微生物侵入の可能性に関する実験的検討
  • ニードルレスコネクターおよびI-systemにおける微生物侵入の可能性に関する実験的検討
  • ニードルレスコネクター オヨビ I-system ニ オケル ビセイブツ シンニュウ ノ カノウセイ ニ カンスル ジッケンテキ ケントウ

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Abstract

Many kinds of connectors in infusion line are used in order to prevent catheter-related bloodstream infections. This study examined and compared the potential contamination between seven kinds of needleless connectors and I-system®; a method to connect and fix by inserting rubber injection port with a needle. In each state, (1) after connecting for 120 hours (long time connection test), or (2) after 70 times connection operation (female connector durability test), the surface of female connector was applied with microorganisms, and (3) after the connection part of male connector was applied with microorganisms, then the new infusion line was connected, the contamination rate in the tube was examined. As a result, it was found that some devices are invaded by the bacteria at high frequency depending on the conditions. In any experiments, I-system® prevented the invasion of the bacteria. In Japan, needleless connector is referred to closed infusion system and is simply considered effective as a countermeasure to prevent infections. However it should be used after recognizing a possibility of an increase in opportunity of infections depending on the use method.

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