Basic knowledge about N95 mask Respirators

N95 Respirators and surgical masks are examples of personal protective equipment that are used to protect the wearer from airborne particles and from liquid contaminating the face. The Centers for Disease Control and Prevention (CDC) National Institute for Occupational Safety and Health (NIOSH) and the Occupational Safety and Health Administration (OSHA) also regulate N95 Respirators.

It is important to recognize that the optimal way to prevent airborne transmission is to use a combination of interventions from across the hierarchy of controls, not just PPE alone.

Here is the content list:

l N95 Respirators

l General N95 Respirator Precautions

l N95 Respirators in Industrial and Health Care Settings

l N95s Respirators regulated under product code MSH are class II medical devices exempt from 510(k) premarket notification

N95 Respirators

An N95 respirator is a respiratory protective device designed to achieve a very close facial fit and very efficient filtration of airborne particles. Note that the edges of the respirator are designed to form a seal around the nose and mouth. Surgical N95 Respirators are commonly used in healthcare settings and are a subset of N95 Filtering Facepiece Respirators (FFRs), often referred to as N95s.

General N95 Respirator Precautions

People with chronic respiratory, cardiac, or other medical conditions that make breathing difficult should check with their health care provider before using an N95 respirator because the N95 respirator can make it more difficult for the wearer to breathe.

Some models have exhalation valves that can make breathing out easier and help reduce heat build-up. Note that N95 Respirators with exhalation valves should not be used when sterile conditions are needed.

All FDA-cleared N95 Respirators are labeled as "single-use," disposable devices. If your respirator is damaged or soiled, or if breathing becomes difficult, you should remove the respirator, discard it properly, and replace it with a new one. To safely discard your N95 respirator, place it in a plastic bag and put it in the trash. Wash your hands after handling the used respirator.

N95 Respirators are not designed for children or people with facial hair. Because a proper fit cannot be achieved on children and people with facial hair, the N95 respirator may not provide full protection.

N95 Respirators in Industrial and Health Care Settings

Most N95 Respirators are manufactured for use in construction and other industrial-type jobs that expose workers to dust and small particles. They are mainly used to filter dust and other particles in the air to prevent entering the human respiratory system and affecting human health.

However, some N95 Respirators are intended for use in a health care setting. Specifically, single-use, disposable respiratory protective devices are used and worn by health care personnel during procedures to protect both the patient and health care personnel from the transfer of microorganisms, body fluids, and particulate material.

N95s Respirators regulated under product code MSH are class II medical devices exempt from 510(k) premarket notification, unless:

The respirator is intended to prevent specific diseases or infections, or the respirator is labeled or otherwise represented as filtering surgical smoke or plumes, filtering specific amounts of viruses or bacteria, reducing the amount of and/or killing viruses, bacteria, or fungi, or affecting allergenicity, or the respirator contains coating technologies unrelated to filtration (e.g., to reduce and or kill microorganisms).

The FDA has a Memorandum of Understanding (MOU) with CDC NIOSH which outlines the framework for coordination and collaboration between the FDA and NIOSH for regulation of this subset of N95 Respirators.