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Respirators, N95 Masks and Surgical masks, what’s the difference?

Nov 20, 2019
N95 Masks — Covington, LA — Exit Biohazard & Crime Scene Cleanup

What is a respirator?
 It’s a key piece of PPE ( Personal Protective Equipment ) for crime scene cleanup so we don’t breathe in any bloodborne pathogens . Some may find this fascinating and some may find this a boring read, but if you wanted to know all about n95 masks and respirators then read on. A respirator is a device designed to protect the wearer from inhaling hazardous or unpleasant atmospheres, including gases, fumes, vapors, and particulate matter such as dusts and airborne microorganisms like the coronavirus . You can imagine how a respirator designed for organic vapor which can keep out the odors from a decomposing body during a cleanup can come in handy. Its also keeping potentially dangerous viruses and bacteria from getting into the mouth nose and lungs. It’s truly a lifesaver.

There are two main categories of respirators: the air-purifying respirator types (APRs) , in which breathable air is obtained by filtering a contaminated atmosphere, and the air-supplied respirator (SARs) , in which an alternate supply of breathable air is delivered. Each type uses different techniques to reduce or eliminate noxious airborne contaminants.
Air-Purifying filtering Respirators range from relatively inexpensive single-use such as surgical masks and n95 disposable masks, or reusable respirator models with replaceable cartridges often called a gas mask or simply a respirator. These are easy to use and very portable and range from inexpensive to several hundreds of dollars. These are the most common of the two types because of cost, portability, and ease of use. We at Exit Cleanup use these daily when cleaning up blood and trauma scenes.
The Air Supplied Respirator is basically a clean supply of breathable air either from wearable tanks or air supplied from an outside source and brought in via hose to the wearer. Generally, these are much more complicated than the typical filtering type. These range from the air tanks you see firemen wear, This is a self-contained breathing apparatus, or SCBA, to the odd looking hose from the ceiling supplying clean air in a cleanroom or laboratory. These are usually more expensive systems and have more limitations such as range or weight than a typical n95 respirator. These supply air to the wearer so they can be used in more harsh environments such as oxygen poor atmospheres due to fire smoke or chemical hazards.

N95 Mask
With the Corona virus crisis , we have heard a lot about PPE and protective masks so when we talk about the N95 mask or respirator its because it’s the most common mask with a wide range of protection. Why do we call it an N95? The NIOSH N95 designation means that when subjected to careful testing, the respirator blocks at least 95 % of very small (0.3 micron) particles. The National Institute for Occupational Safety and Health, NIOSH , is the United States federal agency responsible for conducting research and making recommendations for the prevention of work-related injury and illness. NIOSH is part of the Centers for Disease Control and Prevention (CDC). The N95 respirator is the most common type of particulate filtering facepiece respirators. An N95 respirator is 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. There are other respirators such as:

N95 – Filters at least 95% of airborne particles. Not resistant to oil.
Surgical N95 – A NIOSH-approved N95 respirator that has also been cleared by the Food and Drug Administration (FDA) as a surgical mask.
N99 – Filters at least 99% of airborne particles. Not resistant to oil.
N100 – Filters at least 99.97% of airborne particles. Not resistant to oil.
R95 – Filters at least 95% of airborne particles. Somewhat resistant to oil.
P95 – Filters at least 95% of airborne particles. Strongly resistant to oil.
P99 – Filters at least 99% of airborne particles. Strongly resistant to oil.
P100 – Filters at least 99.97% of airborne particles. Strongly resistant to oil.

Surgical Mask
Lastly the Surgical Mask , A surgical mask is a loose-fitting, disposable device that creates a physical barrier between the mouth and nose of the wearer and potential contaminants in the immediate environment.  These are typically used in places that are highly disinfected already such as medical facilities. These are often referred to as face masks, although not all face masks are regulated as surgical masks. Note that the edges of the mask are not designed to form a seal around the nose and mouth.

The similarities among surgical masks and surgical N95s are: They are tested for fluid resistance, filtration efficiency (particulate filtration efficiency and bacterial filtration efficiency), flammability and biocompatibility.
They should not be shared or reused.

Protect yourself by wearing the proper respirators for the job at hand.  Exit Biohazard an d Crime Scene Cleanup   trains and uses several different styles of respirators and we follow the OSHA Respiratory Protection Standard to ensure safety for our employees and clients.

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