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Microbiologic environment of the conventional operating room
Abstract:
Areas of potential contamination of the surgical wound in the conventional operating rooms include the back table, the unsterile suction receptacle, and the lack of a positive pressure relationship between the operating room and adjacent areas. Use of an impermeable hood with a large mask diminished contamination of the instrument table and the the wound from fallout of bacteria from the surgical team. The level of airborne bacterial comtamination in the operating room can be reduced by limiting the traffic and controlling the activity and the number of operating room personnel. Higher rates of postoperatively wound sepsis were noted in older operating rooms, particularly with difficult procedures and those performed later in the day. Conventional operating rooms should be categorized by the level of room air exchange per hour and the level of airborne bacterial contamination.
Insights
Preventing surgical wound contamination involves controlling operating room (OR) bacterial levels. Strategies include limiting traffic, using protective gear, and assessing OR air exchange rates to reduce surgical site infections.
Area of Science:
- Surgical Infection Prevention
- Operating Room Hygiene
- Bacterial Contamination Control
Background:
- Conventional operating rooms present several contamination risks, including the back table, suction receptacles, and inadequate air pressure differentials.
- Surgical team members can contribute to wound contamination through bacterial fallout.
Purpose of the Study:
- To identify key areas of potential surgical wound contamination in conventional operating rooms.
- To evaluate methods for reducing airborne bacterial contamination within the operating room environment.
- To correlate operating room characteristics with postoperative wound sepsis rates.
Main Methods:
- Assessed contamination sources in conventional operating rooms.
- Evaluated the impact of impermeable hoods and masks on bacterial contamination.
- Analyzed the effect of personnel traffic, activity, and numbers on airborne bacteria.
- Correlated postoperative wound sepsis rates with operating room age and procedure difficulty.
Main Results:
- Impermeable hoods with large masks significantly reduced instrument table and wound contamination from surgical team bacterial fallout.
- Limiting traffic, controlling activity, and reducing personnel numbers lowered airborne bacterial contamination levels.
- Older operating rooms showed higher rates of postoperative wound sepsis, especially for complex procedures or those performed late in the day.
Conclusions:
- Controlling airborne bacteria in operating rooms is crucial for preventing surgical wound contamination.
- Operating room design and protocols, including air exchange rates and personnel management, impact infection rates.
- Categorizing conventional operating rooms based on air exchange and bacterial contamination levels is recommended.