WHO updates PPE guidelines for Ebola response

The harsh toll that Ebola has had on health workers in West Africa, and in other countries such as Spain and America, prompted the World Health Organisation (WHO) to conduct a formal review of personal protective equipment (PPE) guidelines for healthcare workers and has updated its guidelines in context of the current outbreak.

The aim of these new guidelines is to “clarify and standardise safe and effective PPE options to protect health care workers and patients, as well as provide information for procurement of PPE stock in the current Ebola outbreak”. The guidelines are based on a review of evidence of PPE use during care of suspected and confirmed Ebola virus disease patients.

The Guidelines Development Group, convened by WHO, included a variety of experts from developed and developing countries, and international organisations including the United States Centers for Disease Control and Prevention, Médecins Sans Frontières, the Infection Control Africa Network and more.

“These guidelines hold an important role in clarifying effective personal protective equipment options that protect the safety of healthcare workers and patients from Ebola virus disease transmission,” says Edward Kelley, WHO Director for Service Delivery and Safety. “Paramount to the guidelines’ effectiveness is the inclusion of mandatory training on the putting on, taking off and decontaminating of PPE, followed by mentoring for all users before engaging in any clinical care.”

WHO’s website states that, “Guidelines were developed from an accelerated development process that meets WHO’s standards for scientific rigour and serves as a complement to the Interim infection prevention and control guidance for care of patients with suspected or confirmed filovirus haemorrhagic fever in health-care settings, with focus on Ebola, published by WHO in August 2014.”

According to experts involved in developing this new advice, it is most important to have PPE that protects the mouth, nose and eyes from contaminated droplets and fluids.

The team found no scientific evidence comparing the effectiveness of face shields and goggles and said either could be used, based on preference and availability. However, they said the two should not be worn together.
For respiratory protection, the team recommends waterproof masks that don’t collapse against the mouth, such as a “duckbill” design, for regular treatment and fluid-resistant (surgical) particulate respirators for use during aerosol-generating procedures. This differs from CDC guidance, which calls for N95 respirators or powered air-purifying respirators for all patient care.

As hands are known to transmit pathogens to other parts of the body, as well as to other individuals, hand hygiene and gloves are also essential, both to protect the health worker and to prevent transmission to others. All health workers should wear double gloves, preferable nitrile ones that resist chemicals, when caring for patients with Ebola and other filovirus infections. Face cover, protective foot wear, gowns or coveralls, and head cover were also considered essential to prevent transmission to healthcare workers.

“Although PPE is the most visible control used to prevent transmission, it is effective only if applied together with other controls including facilities for barrier nursing and work organisation, water and sanitation, hand hygiene, and waste management,” says Marie-Paule Kieny, Assistant Director-General of Health Systems and Innovation.

Benefits derived from PPE depend not only on choice of PPE, but also adherence to protocol on use of the equipment.

WHO state that, “A fundamental principle guiding the selection of different types of PPE was the effort to strike a balance between the best possible protection against infection while allowing health workers to provide the best possible care to patients with maximum ease, dexterity, comfort and minimal heat-associated stress. In this situation where evidence is still being collected, to see what works best and on an effective sustainable basis, it was considered prudent to provide options for selecting PPE. In most cases, there was no evidence to show that any one of the options recommended is superior to other options available for healthcare worker safety.”

You can find the guidelines in full here. WHO also provided guidelines on putting on and removing PPE, which can be found here.

There will be a wide range of exhibitors specialising in PPE at Intersec 2015. Find out who you can expect to see here.

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