The Bactericidal Effect of Sodium Hypochlorite and Germicidal Lamps ── A Study of the Optimal Concentration of sodium Hypochlorite and of Conditions for Germicidal Lamps ──
| Jazyk: | japonština |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | 群馬県立県民健康科学大学紀要. 17:61-71 |
| ISSN: | 1881-0691 |
| Popis: | 病棟や介護施設の器具やベッド，ガウンなどの殺菌には，次亜塩素酸ナトリウム（以下SH）や殺菌灯などが利用されてきた．SH が文献に示されている希釈率で本当に細菌等が殺菌されているのか，また，希釈後の劣化の進度について示された研究は少ない．我々は，市販のSH をそれぞれの目的のためには，どの程度希釈すればよいのか，その希釈液の劣化の程度，殺菌灯の到達距離について，著者1 名の鼻粘膜常在菌と，市販大腸菌を用いて検証した．SH（原液5％程度）は，殺菌には0.02～0.5％（250 倍～10 倍希釈）が適当とされているが，実際には100 倍希釈でも細菌が増えている場合があること，塩素濃度は下がっていないのに，かなり劣化している場合があることが判明した．殺菌灯は，近距離では30 秒で十分であること，天井に設置した場合には，床面のサンプルに対し，1 時間程度の照射で効果があることがわかった．次亜塩素水の劣化についてもコメントする． Purpose: Sodium hypochlorite and germicidal lamps have been used to sterilize equipment, beds, and gowns in wards and long-term care facilities. With sodium hypochlorite, there are few studies on whether bacteria, etc. are actually sterilized at the dilution shown in the literature and on further deterioration after dilution. The aim of this study was to determine to what degree sodium hypochlorite on the market should be diluted for each purpose, how much the diluted solution deteriorates, and how far does the germicidal lamp reach.Methods: One of the authors' indigenous bacteria on the nasal mucosa and commercially available Escherichia coli were used for this study. The results of various experiments were evaluated by the number of bacterial colonies that appeared on the plate.Results: Sodium hypochlorite is said to have a stock solution of about 5% and is diluted to 0.02% to 0.5% (250 to 10times) for use, but in reality, bacteria sometimes increase, even though the residual chlorine concentration is sufficient at 1%. It was found that it deteriorated considerably even though the concentration was appropriate for sterilization. It was found that the germicidal lamp sterilized bacteria in 30 seconds at a short distance, and in the case of a germicidal lamp installed on the ceiling, the sample on the floor was sterilized in about 1 hour. This paper also presents some results on thedeterioration of hypochlorite water. 報告 |
| Databáze: | OpenAIRE |
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