Nebulized plasma-activated water has an effective antimicrobial effect on medically relevant microbial species and maintains its physicochemical properties in tube lengths from 0.1 up to 1.0 m,Plasma Processes and Polymers

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Nebulized plasma-activated water has an effective antimicrobial effect on medically relevant microbial species and maintains its physicochemical properties in tube lengths from 0.1 up to 1.0 m
Plasma Processes and Polymers ( IF 2.9 ) Pub Date : 2021-08-03 , DOI: 10.1002/ppap.202100010
William Chiappim _{1,

2} , Aline Sampaio ₃ , Felipe Miranda ₁ , Gilberto Petraconi ₁ , Argemiro Silva Sobrinho ₁ , Paulo Cardoso ₄ , Konstantin Kostov ₅ , Cristiane Koga‐Ito ₃ , Rodrigo Pessoa ₁

Affiliation

This study applies a proof of concept for future applications in controlling the microbiota in tubes and tracheal appliances used in the respiratory tract. Therefore, the physical–chemical parameters of the plasma-activated and nebulized water (NPAW) are measured in a nebulizer tube with different lengths between 0.1 and 3.0 m. The pH values and oxidation–reduction potential (ORP) do not change during nebulization of PAW over a 1.0 m tube. However, for longer lengths, there is an increase in pH and a decrease in ORP. At 3.0 m, the pH increases approximately 16% compared with the 1.0 m position with a 20% decrease in the ORP values. Hydrogen peroxide (H₂O₂) measured quantitatively using test strips presents values between 0.5 and 2.0 mg/L for condensed NPAW in different tube lengths between 0.1 and 3.0 m, and maintains the approximate value of 2.0 mg/L in tubes up to 1.0 m, with a reduction proportional to the increase in the length of the tube. The antimicrobial efficacy of NPAW applied for 15 min shows the inactivation of Staphylococcus aureus and Escherichia coli but without significant inactivation of Candida albicans.

中文翻译：

雾化等离子体活化水对医学相关微生物种类具有有效的抗菌作用，并在 0.1 至 1.0 m 的管长内保持其理化特性

这项研究为未来在控制呼吸道使用的管道和气管器具中的微生物群方面的应用提供了概念证明。因此，等离子活化雾化水 (NPAW) 的物理化学参数在长度介于 0.1 和 3.0 m 之间的不同长度的雾化管中进行测量。在 1.0 m 管上雾化 PAW 期间，pH 值和氧化还原电位 (ORP) 不会改变。然而，对于更长的长度，pH 值会升高，ORP 值会降低。在 3.0 m 处，与 1.0 m 位置相比，pH 值增加约 16%，ORP 值降低 20%。过氧化氢（H ₂ O ₂) 使用测试条进行定量测量，在 0.1 到 3.0 m 之间的不同管长中，冷凝 NPAW 的值在 0.5 到 2.0 mg/L 之间，并且在管长为 1.0 m 的管中保持 2.0 mg/L 的近似值，减少与管子长度的增加。NPAW 应用 15 分钟的抗菌功效表明金黄色葡萄球菌和大肠杆菌被灭活，但白色念珠菌没有明显的灭活。

更新日期：2021-08-03

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