Sterilizing effect of 980 nm continuous laser on metal surface of medical equipment

Heping Cheng; Liangnan Zeng; Zhimeng Huang; Yanyan Chen; Tunan Chen; Hua Feng; Jishu Xian

doi:10.16016/j.1000-5404.201611255

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Sterilizing effect of 980 nm continuous laser on metal surface of medical equipment

更新时间：2026-01-09

- Sterilizing effect of 980 nm continuous laser on metal surface of medical equipment
- Journal of Third Military Medical University Vol. 39, Issue 9, Pages: 878-883(2017)
- 作者机构：
- 作者简介：
- 基金信息：
  
  the Postdoctoral Science Foundation of China(2014M552542XB);the Postdoctoral Science Foundation of China(2015T80989);the General Program of National Natural Science Foundation of China(81402067);the Talent Starting Project of Huangshan University(2016xkjq001);the Foundation of China Academy of Engineering Physics(JM20150);the Incubation Fund of Interdisciplinary Laboratory of Physics and Biomedicine of China Academy of Engineering Physics(JCFH)
- DOI：10.16016/j.1000-5404.201611255
  CLC：
- Received：30 November 2016，
  
  Published：15 May 2017
- 稿件说明：
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Heping Cheng, Liangnan Zeng, Zhimeng Huang, et al. Sterilizing effect of 980 nm continuous laser on metal surface of medical equipment[J]. Journal of Third Military Medical University, 2017, 39(9): 878-883.
DOI：

Heping Cheng, Liangnan Zeng, Zhimeng Huang, et al. Sterilizing effect of 980 nm continuous laser on metal surface of medical equipment[J]. Journal of Third Military Medical University, 2017, 39(9): 878-883. DOI： 10.16016/j.1000-5404.201611255.

摘要

Abstract

Objective

To investigate the relationship of power and exposure period of 980 nm continuous laser system on the surface sterilization for metal medical equipment.

Methods

The sterile steel lancets were artificially contaminated with

Staphylococcus aureus

and

Escherichia coli

respectively. These lancets were exposed and disinfected by 980 nm continuous laser at different powers for different time periods. The inactivation of the bacteria on each lancet was observed and measured by 8-hour enrichment culture.

Results

Staphylococcus aureus

were thoroughly killed after the lancets were disinfected by the 980 nm laser at 5.24 W for 29 s

6.87 W for 24 s

8.33 W for 14 s

and 10.11 W for 14 s

respectively. The power and exposure period for

Escherichia coli

were 5.24 W for 22 s

6.87 W for 12 s

8.33 W for 11 s

and 10.11 W for 9 s

respectively.

Escherichia coli

was more likely to be inactivated than

Staphylococcus aureus

. According to the experimental data

the survival rate under same power of infrared laser as a function of irradiation time was fitted to the first-order kinetics equation.

Conclusion

980 nm infrared laser can achieve rapid sterilization on metal surface of medical equipment in a very short time period. The larger power the laser is with

the shorter is the exposure period

and the better the sterilizing effect is.

关键词

Keywords

references

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