Placeholder Image

字幕表 動画を再生する

  • When you must wear a respirator to protect

  • yourself against airborne contaminants in

  • your workplace, it is very important to

  • follow proper procedures for putting it on

  • and taking it off. The process of putting on

  • and taking off your respirator is also referred

  • to asdonning and doffing.” Respirator

  • manufacturers supply instructions on how to

  • properly don and doff (put on and take off)

  • each respirator they produce.

  • The manufacturer also supplies instructions

  • on how to properly conduct a user seal

  • check. A “user seal checkis a way to

  • verify that the respirator has been properly

  • positioned on your face to assure a proper seal.

  • Sometimes, workers confuse the termuser

  • seal checkwith the termfit test,” which is

  • different. A user seal check is not a

  • substitute for a fit test, which is a more

  • involved process that uses a test agent or

  • instrument to verify the respirator’s fit. A fit

  • test must be performed before you wear a

  • respirator for the first time and at least

  • annually thereafter. A user seal check must

  • be performed each time you put on a

  • respirator to check that it has been donned correctly.

  • Remember, always follow the respirator

  • manufacturer’s instructions for the specific

  • respirator model that you are using.

  • Here are some general instructions for

  • properly donning and doffing and properly

  • conducting a user seal check for the two

  • most common types of respirators.

  • Let’s begin with general instructions for a

  • disposable filtering facepiece respirator,

  • which is often referred to as an “N95” or a

  • dust mask”:

  • Inspect the respirator, including the straps,

  • for tears or damage. If you find any damage

  • to the respirator, replace it. If your respirator

  • comes out of its original container folded

  • flat, open the folds fully, following the

  • manufacturer’s instructions.

  • Using one hand, place the respirator on your

  • face with the nosepiece at your fingertips,

  • allowing the headbands to hang freely. The

  • nosepiece should span and cover the bridge

  • of your nose, and the respirator should cup

  • your chin.

  • Pull the top strap over your head, resting it

  • high at the back of your head. Pull the

  • bottom strap over your head and position it

  • around your neck and below your ears. Be

  • sure not to criss-cross the straps. Make sure

  • that your mouth and nose are covered

  • by the respirator.

  • If the nosepiece has a metal nosepiece or

  • strip, use both hands to mold the nose strip

  • to conform to the shape of your nose by

  • pushing inward while moving your fingertips

  • down along both sides of the nosepiece.

  • Next, conduct a user seal check. It’s

  • essential to follow the manufacturer’s user

  • seal check instructions because the

  • manufacturer knows the best method for

  • checking their respirator.

  • Generally speaking, the manufacturer’s

  • instructions are based on covering the

  • surface of the respirator, usually with your

  • hands, so that air is prevented from passing

  • through the filtering facepiece. A positive

  • pressure seal check is performed by gently

  • exhaling to see if the facepiece bulges

  • slightly. For a negative pressure seal check,

  • take a quick, deep breath to see if the

  • facepiece collapses slightly.

  • During either test, if air leaks out between

  • your face and the respirator’s faceseal, the

  • respirator may not fit your face properly.

  • One way that you can identify leakage is if

  • you feel air blowing through the seal onto

  • your face or eyes. If you feel leakage,

  • readjust the fit of your respirator and check

  • the seal again.

  • If you cannot achieve a proper seal, you are

  • not protected and should not enter a

  • hazardous area. See your supervisor to

  • determine what the problem may be.

  • When youre finished wearing the respirator,

  • carefully remove it without touching the

  • exterior, because the exterior may be

  • contaminated. Discard your respirator

  • according to your company’s procedures.

  • Now, let’s explore the general instructions

  • for properly donning and doffing and

  • properly conducting a user seal check for a

  • half facepiece elastomeric respirator,

  • sometimes referred to as a “half mask.”

  • Remember, these are just general

  • instructions. You should always follow the

  • manufacturer’s instructions for the specific

  • respirator model that you are using.

  • To begin, inspect the respirator, including

  • the straps, valves, and gaskets, for loose,

  • missing, or damaged parts. If you find any

  • damage to the respirator, repair or replace it.

  • Then, pull the bottom strap over your head.

  • Place the respirator facepiece under your

  • chin and over your nose, with the narrow

  • part of the facepiece over your nose.

  • Pull the head harness over the crown of your

  • head and adjust its placement until it is

  • stable, but comfortable.

  • Be sure that the neckstrap is flat and smooth

  • against the back of your neck. Adjust the

  • neckstrap, but be careful not to over-tighten

  • the respirator to your face.

  • Next, perform a positive pressure user seal

  • check. Place the palm of your hand over the

  • exhalation valve outlet. Do not push so hard

  • that you distort the natural shape of the

  • facepiece. Exhale gently and hold your

  • breath to create and maintain a slight

  • positive pressure inside the facepiece. If the

  • facepiece bulges slightly and no air leaks are

  • detected between your face and the

  • facepiece, a proper fit has been achieved.

  • If, on the other hand, you detect faceseal

  • leakage, reposition the facepiece and

  • readjust the straps, and then retest. If you

  • cannot achieve a proper seal, you are not

  • protected and should not enter

  • a hazardous area.

  • See your supervisor to determine

  • what the problem may be.

  • Next, perform the negative pressure seal

  • check. Cover the respirator cartridges or

  • filters with the palms of your hands. Inhale

  • gently. If you feel the facepiece collapse

  • slightly and pull closer to your face with no

  • leaks between the face and facepiece, a

  • proper seal has been made. If you detect

  • faceseal air leakage, reposition the respirator

  • on your face and readjust the straps, then

  • recheck. If you cannot achieve a proper seal,

  • you are not protected and should not enter a

  • hazardous area. See your supervisor to

  • determine what the problem may be.

  • When you have finished wearing the

  • respirator, carefully remove it by loosening

  • the straps and taking it off without touching

  • the cartridges or filters, because they may be contaminated.

  • Follow your company’s procedures for

  • maintenance of the respirator, including

  • proper cleaning and disinfecting and storage.

  • Remember, respirators must be used in the

  • context of a comprehensive respiratory

  • protection program, according to OSHA

  • standard 29 CFR 1910.134.

When you must wear a respirator to protect

字幕と単語

動画の操作 ここで「動画」の調整と「字幕」の表示を設定することができます

B2 中上級

呼吸器の安全性 (Respirator Safety)

  • 26 2
    kuoyumei に公開 2021 年 01 月 14 日
動画の中の単語