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Microbial contamination by a medical carbon dioxide laser
Lasers in Surgery and Medicine
|January 1, 1983
Summary
Carbon dioxide laser use in medicine can sterilize wounds. However, microbial studies revealed significant contamination from cooling nitrogen gas, which was reduced with simple filter procedures.
Area of Science:
- Medical technology
- Microbiology
- Laser surgery
Background:
- Carbon dioxide lasers are utilized in medicine for their sterilizing properties during surgical interventions.
- Concerns exist regarding potential microbial contamination associated with laser usage.
Purpose of the Study:
- To investigate microbial contamination in areas affected by carbon dioxide laser use.
- To identify the source of contamination and evaluate methods to mitigate it.
Main Methods:
- Microbial studies were conducted using the Sharplan Model 743 Medical Laser.
- Experiments assessed contamination levels of bacteria and fungi below the laser probe.
- Prophylactic procedures, including filter insertion, were implemented and evaluated.
Main Results:
- Substantial contamination by viable bacteria and fungi was consistently found below the laser probe.
- Nitrogen gas emitted for lens cooling was identified as the likely source of contamination.
- Implementing a filter on the nitrogen gas tube significantly reduced microbial contamination.
Conclusions:
- The nitrogen gas stream used for cooling in carbon dioxide laser systems can cause significant microbial contamination.
- Simple prophylactic measures, such as filtration, are effective in reducing contamination to insignificant levels.
- Ensuring sterile practices is crucial when using lasers in medical procedures.