Environmental-Pollution-Related Condition Clinical Trial
Official title:
Potential Risk for Bacterial Contamination in Conventional Reused Ventilator Systems and Disposable Closed Ventilator-Suction Systems
Verified date | November 2017 |
Source | Chang Gung University |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational [Patient Registry] |
Background: Few studies have investigated the difference of bacterial contamination between
conventional reused ventilator systems and disposable closed ventilator-suction systems. The
aim of this study was to investigate the bacterial contamination rates of the reused and
disposable ventilation systems, and the association between system disconnection and
bacterial contamination of ventilator systems.
Methods: The enrolled patients used a conventional reused ventilator system and a disposable
closed ventilator-suction system, respectively, for a week; specimens were then collected
from the ventilators' internal system to evaluate human and environmental bacterial
contamination. The sputum specimens from patients were also analyzed in this study.
Results: The detection rate of bacteria in the conventional reused ventilator system was
substantially higher than that in the disposable system. The inspiratory and expiratory limbs
of disposable closed ventilator-suction system had higher bacterial concentrations than the
conventional reused ventilator system. The bacterial concentration in the heated humidifier
(HH) of the reused system was significantly higher than that in the disposable system.
Positive associations existed among the bacterial concentrations at different locations in
the reused and disposable ventilator systems, respectively. The predominant bacteria
identified in the reused and disposable ventilator systems included Acinetobacter spp.,
Bacillus cereus, Elizabethkingia spp., Pseudomonas spp., and Stenotrophomonas (Xan)
maltophilia.
Conclusion: Both the reused and disposable ventilation systems had high bacterial
contamination rates after one week of use. Disconnection of the ventilator systems should be
avoided during system operation for decreasing the risks of environmental pollution and human
exposure, especially for the disposable system.
Status | Completed |
Enrollment | 27 |
Est. completion date | July 31, 2016 |
Est. primary completion date | July 1, 2016 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 20 Years to 91 Years |
Eligibility |
Inclusion Criteria: - the mechanically ventilated patients in the ICU Exclusion Criteria: - the sputum culture results of the patients indicated the presence of drug-resistant bacteria, influenza virus, and early extubation. |
Country | Name | City | State |
---|---|---|---|
n/a |
Lead Sponsor | Collaborator |
---|---|
Chang Gung University | Chang Gung Memorial Hospital |
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | bacterial concentration | comparison of the two ventilator systems | 7 days later | |
Secondary | bacterial detection rate | comparison of the two ventilator systems | 7 days later |
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