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Gravity steam reprocessing in healthcare facilities for the reuse of N95 respirators.
J Hosp Infect. 2020 Dec; 106(4):698-708.JH

Abstract

BACKGROUND

Coronavirus disease 2019 (COVID-19) has significantly impacted the health of millions of people around the world. The shortage of personal protective equipment, including N95 respirators, in hospital facilities has put frontline healthcare professionals at high risk for contracting this virus.

AIM

To develop a reproducible and safe N95 respirator reprocessing method that satisfies all presented regulatory standards and that can be directly implemented by hospitals using existing available equipment.

METHODS

A non-toxic gravity steam reprocessing method has been developed for the reuse of N95 respirators consisting of 30 min of steam treatment at 121°C followed by 30 min of heat drying. Samples of model number 1860, 1860s, 1870+, and 9105 N95 respirators were either collected from hospitals (for microbiology testing) or purchased new (for functionality testing), with all functionality tests (i.e. filter efficiency, fit evaluation, and strap integrity) performed at the Centers for Disease Control and Prevention using standard procedures established by the National Institute for Occupational Safety and Health.

FINDINGS

All tested models passed the minimum filter efficiency of 95% after three cycles of gravity steam reprocessing. The 1870+ N95 respirator model is the most promising model for reprocessing based on its efficient bacterial inactivation coupled with the maintenance of all other key functional respirator properties after multiple reprocessing steps.

CONCLUSIONS

The gravity steam method can effectively reprocess N95 respirators over at least three reprocessing cycles without negatively impacting the functionality requirements set out by regulators. Enabling the reuse of N95 respirators is a crucial tool for managing both the current pandemic and future healthcare crises.

Authors+Show Affiliations

SteriPro Canada, Inc., Mississauga, Ontario, Canada. Electronic address: anas.aljabo@steriprocanada.com.Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada.Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada.Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada.SteriPro Canada, Inc., Mississauga, Ontario, Canada.

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

33017616

Citation

Aljabo, A, et al. "Gravity Steam Reprocessing in Healthcare Facilities for the Reuse of N95 Respirators." The Journal of Hospital Infection, vol. 106, no. 4, 2020, pp. 698-708.
Aljabo A, Mueller E, Abdul-Azeez D, et al. Gravity steam reprocessing in healthcare facilities for the reuse of N95 respirators. J Hosp Infect. 2020;106(4):698-708.
Aljabo, A., Mueller, E., Abdul-Azeez, D., Hoare, T., & Jain, A. (2020). Gravity steam reprocessing in healthcare facilities for the reuse of N95 respirators. The Journal of Hospital Infection, 106(4), 698-708. https://doi.org/10.1016/j.jhin.2020.09.032
Aljabo A, et al. Gravity Steam Reprocessing in Healthcare Facilities for the Reuse of N95 Respirators. J Hosp Infect. 2020;106(4):698-708. PubMed PMID: 33017616.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Gravity steam reprocessing in healthcare facilities for the reuse of N95 respirators. AU - Aljabo,A, AU - Mueller,E, AU - Abdul-Azeez,D, AU - Hoare,T, AU - Jain,A, Y1 - 2020/10/02/ PY - 2020/07/22/received PY - 2020/09/17/revised PY - 2020/09/27/accepted PY - 2020/10/6/pubmed PY - 2021/1/13/medline PY - 2020/10/5/entrez KW - COVID-19 KW - Filtration KW - N95 respirators KW - Reprocessing KW - Reuse KW - Steam SP - 698 EP - 708 JF - The Journal of hospital infection JO - J Hosp Infect VL - 106 IS - 4 N2 - BACKGROUND: Coronavirus disease 2019 (COVID-19) has significantly impacted the health of millions of people around the world. The shortage of personal protective equipment, including N95 respirators, in hospital facilities has put frontline healthcare professionals at high risk for contracting this virus. AIM: To develop a reproducible and safe N95 respirator reprocessing method that satisfies all presented regulatory standards and that can be directly implemented by hospitals using existing available equipment. METHODS: A non-toxic gravity steam reprocessing method has been developed for the reuse of N95 respirators consisting of 30 min of steam treatment at 121°C followed by 30 min of heat drying. Samples of model number 1860, 1860s, 1870+, and 9105 N95 respirators were either collected from hospitals (for microbiology testing) or purchased new (for functionality testing), with all functionality tests (i.e. filter efficiency, fit evaluation, and strap integrity) performed at the Centers for Disease Control and Prevention using standard procedures established by the National Institute for Occupational Safety and Health. FINDINGS: All tested models passed the minimum filter efficiency of 95% after three cycles of gravity steam reprocessing. The 1870+ N95 respirator model is the most promising model for reprocessing based on its efficient bacterial inactivation coupled with the maintenance of all other key functional respirator properties after multiple reprocessing steps. CONCLUSIONS: The gravity steam method can effectively reprocess N95 respirators over at least three reprocessing cycles without negatively impacting the functionality requirements set out by regulators. Enabling the reuse of N95 respirators is a crucial tool for managing both the current pandemic and future healthcare crises. SN - 1532-2939 UR - https://www.unboundmedicine.com/medline/citation/33017616/Gravity_steam_reprocessing_in_healthcare_facilities_for_the_reuse_of_N95_respirators_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0195-6701(20)30457-6 DB - PRIME DP - Unbound Medicine ER -