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Impact of medical waste bin on contamination of patient's environment: An experimental study
Minkyeong Lee1, Sang-Won Park2, Jihwan Bang2
1Department of Internal Medicine, Seoul National University Hospital and Seoul National University College of Medicine, Seoul, Korea; Department of Internal Medicine, Seoul Metropolitan Government, Seoul National University Boramae Medical Centre and Seoul National University College of Medicine, Seoul, Korea.
Background:
Medical waste bins are a potential source of microbial contamination in the hospital environment, while there is no clear guidance for the management of them. We aimed to assess the impact of medical waste bins on patient's environment.
Methods:
This experimental study simulated microbial contamination by performing medical procedures on a patient model with fluorescent lotion. The waste bin was set as initially empty or two-thirds filled with waste, open or with a lid. The percentage of fluorescent-contaminated area in designated patient's environments was analyzed by 2 independent observers.
Results:
Among a total of 120 experiments, the sides of the bins were more contaminated in open-occupied bins compared to open-empty bins and in open-occupied bins compared to lid-occupied bins (median 1.9175% vs 0.0916% [P = .001] and 1.9175% vs 0.0899% [P = .003], respectively). The top of the bedside equipment trolley for preparing medical procedures was more contaminated in lid-occupied bins than open-occupied bins (median 0.0080% vs 0.0040%, P = .013).
Discussion:
In addition to reducing contamination of the bin itself, the manually operated lid had a potential risk of contributing to microbial transmission by contaminating the equipment trolley.
Conclusions:
Medical waste bins should be kept no more than two-thirds full, and caution should be taken when using the manually operated lid, to avoid cross-contamination.
Insights
Medical waste bins can spread microbes in hospitals. Keeping bins less than two-thirds full and using lids cautiously can reduce patient environment contamination and cross-contamination risks.
Area of Science:
- Healthcare-associated infection control
- Environmental hygiene in medical facilities
Background:
- Medical waste bins are recognized as potential sources of microbial contamination within hospital settings.
- Current guidelines for managing medical waste bins are insufficient, posing risks to patient environments.
Purpose of the Study:
- To evaluate the influence of medical waste bins on microbial contamination in patient care areas.
- To assess the impact of bin fill level and lid use on environmental microbial spread.
Main Methods:
- An experimental study simulated microbial contamination using fluorescent lotion on a patient model.
- Variables included bin fill level (empty vs. two-thirds full) and lid status (open vs. closed).
- Contamination levels were quantified by measuring the percentage of fluorescent area in patient environments.
Main Results:
- Open, occupied bins showed significantly higher contamination on their sides compared to open, empty bins (P=.001).
- Contamination on bin sides was also higher in open, occupied bins versus lid-occupied bins (P=.003).
- The top of bedside equipment trolleys had higher contamination in lid-occupied bins than open-occupied bins (P=.013).
Conclusions:
- Medical waste bins should not exceed two-thirds capacity to minimize contamination.
- Careful use of manually operated lids is advised to prevent microbial transmission and cross-contamination of equipment.
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