Simulation Results for Contamination Comparisons by Various Use Protocols of Personal Protective Equipment

Kang, JaHyun

Abstract

BACKGROUND/AIMS
Due to a lack of scientific evidence and unstandardized protocols, the correct use of personal protective equipment (PPE) is not always easy for healthcare personnel (HCP). This study aimed to generate experimental evidence to reduce contaminations during PPE doffing.
METHODS
With institutional review board approval, 4 standardized HCP were recruited to examine selected PPE protocols based on consultations with 10 invited Korean infection control leaders. Using fluorescent powder and ultraviolet light, each PPE protocol was evaluated for contaminations by comparing methods or steps. Pictures of contaminated areas and videos of HCP practice were evaluated for case analysis by linking all collected data using assigned study experiment codes.
RESULTS
A total of 38 simulation experiments were conducted during December 14-20, 2016. No significant difference was found among minor variations in PPE protocols. Rather, after an intensive, 1-minute patient care simulation (e.g., physical assessment), severe powder contaminations on the front and under the sleeves of coveralls were found. Even after the outer-glove surface was wiped clean, partial contaminations still remained, especially between fingers and on fingertips. Moreover, after cleaning glove surface contaminations using wipes, each doffing step caused different contaminations. Among different types of N95 respirators, the foldable N95 type was the most stable during doffing processes, with less possibility of contamination.
CONCLUSIONS
Based on this study's findings with visual evidence of contaminations during PPE doffing processes, some meaningful recommendations were feasible, such as the use of disposable long-sleeve aprons over coveralls. Further study is necessary to evaluate these recommendations.