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Terms in this set (30)
Personalized Protective Equipment (PPE)
consists of specialized clothing and equipment used to minimize your exposure to hazards that can cause serious workplace injuries and illnesses
PPE helps:
-Protect you from potentially infectious materials and hazards
-Reduce contamination of surfaces inside the laboratory
-Enhance protection when used in conjunction with other safety measures
Eye and Face Protection:
- safety gasses: designed to protect eyes
- goggles: desgined to protect eyes, higher impact protection, most often used with chemicals
- face
shields: designed as secondary protection, can be impact and chemical resistant, should be combined with glasses or goggles, should cover forehead, extend below chin, and wrap around sides of face
- surgical masks: designed to protect mouth and nose from splashes or sprays of blood, bodily fluids, secretions and excretions
Respiratory protection for biohazards
- filtering facepiece respirators or N95s
-
powdered air purifying respirators (PAPRs)
- if respirators are indicated by risk assessment: personnel must have medical clearance, be fit tested and trained annually; they reduce exposure they do NOT eliminate exposure
- remember: facial hair can interfere with FFRs and other tight fitting respirators; surgical masks are NOT respirators; for chem hazards consult w supervisor
Filtering Face Piece (FFR) respirator
-
negative-pressure respirators; the user is inhaling and pulling air through a filter generating negative pressure space between the respirator and the user's face
- Purify air inhaled by filtering out small particles
- The most commonly used FFRs are N95 disposable respirators; "N95" is a term referring to the N95 filter class, which removes at least 95% of particulates of a certain size 4
- Require fit testing, as respirator forms tight-fitting seal on wearer's face
- Cannot be used
by workers with facial hair, as they may prevent an adequate seal between the respirator and the face
Powdered air-purifying respirators (PAPRs)
- positive-pressure respirators, as the PAPR's blower is doing the work pulling air through a filter and blowing it on the user's face generating positive pressure
- A blower pulls air through the filter in the facepiece to remove particulates
- Based on the risk
assessment, PAPRs can be used in certain laboratories when there is a potentially high exposure risk from aerosol-generating procedures
- Respirators such as PAPRs, in which the hood or helmet is designed to form only a partial seal with the wearer's face or hoods which seal loosely around the wearer's neck or shoulders
- May not require fit testing. Check with supervisor and review laboratory SOPs to determine if a fit test is required
- Can be used by workers with facial
hair
Body protection
- fluid resistant or fluid impermeable lab coat
- disposable or reusable lab coat
- solid front/wrap around gown
- button down or snap lab coat
- cuffed sleeves lab coat
Hand protection
- gloves protect from exposure to chemicals, temp and other hazardous materials and reduce risks associated
with skin contact
- select type of gloves corresponding to specific activity or hazard
- verify suitability of gloves prior to handling infectious and other materials
Foot protection
- protective footwear helps protect from splashes, chemicals, and other hazards
- protects entire foot (no open shoes)
- disposable shoe covers provide additional layer of protection over shoes
- dedicated lab shoes
minimize tracking infectious agents out of the lab
- foot protection may include non slip footwear that design to reduce or prevent slipping
Hazards vs risks
hazards are potential source of harm
risks are the combination of the probability of occurrence of harm and the severity of that harm
Four types of hazards
1.
chemical
2. biological
3. physical
4. procedural
Chemical hazard
Any basic substance used in or produced by a reaction involving changes to atoms or molecules can be a chemical hazard, which can be dangerous to laboratory professionals.
- may be solids, liquids, mists, vapors or gas.
Biological Hazard
infectious
agents or other biological materials that present a hazard or potential risk to the health of humans, animals, or the environment
- can include bacteria, viruses, parasites, fungi, toxins, and prions
Physical hazards
unsafe conditions in the workplace that can cause injury or illness
- equipment, extreme temperatures, harmful UV light, slip or trip, noise
Procedural hazards
performing a procedure or using equipment can present hazards
- not following SOPs, not using proper controls, working improperly in BSC, and generating aerosols
Elimination
- elimination controls provide protection by physically removing the hazard from the work environment
- may involve not performing diagnostic testing, or transferring testing to another
location, which is not usually an option
Substitution
- provide protection by replacing the hazard with something less harmful
- for example modifying a procedure with less harmful materials or using different equipment
Engineering controls
- provide protection by isolating people from the hazard
- examples include using
safety equipment, centrifuge safety cups, chemical fume hoods, BSCs
Administrative controls
- provide protection by changing the way people work with the hazard
- examples include SOPs, safer work practices, changing techniques, and training
PPE
- provide protection from the hazard by putting a barrier between the worker and
the hazard
- considered last line of defense against potential hazards
- safety gloves, glasses, coat, respirator
Factors that influence PPE
1. pathogen characteristics
2. portals of entry
3. routes of transmission
4. fit, comfort, and durability
5. limitations
6. procedure
Pathogen characteristics
-
infectious dose
- pathogenicity: ability to produce disease
- virulence: severity of disease
- environmental stability
- availability of vaccines or treatment
- (routes of transmission)
Portals of Entry
- mucous membranes: eyes, nose, mouth, - face shields, masks, goggles, etc
- nose: respirators may help with aerosols and masks with splashes
- mouth: face shields and masks help
-
non-intact skin: lab coat or gloves
Routes of Transmission
- direct contact
- indirect contact
- inhalation
- ingestion
- percutaneous
Fit, comfort, and durability
should fit comfortably and allow flexibility and durability suitable for the task
needs to be durable enough for task ex. heat, chemicals,
etc.
Examples of PPE limiatations
- Safety glasses are intended to protect the worker from impact to their eyes. They do not always protect against chemical or biological splashes, and may not protect against heat.
- N95 respirators do not filter out chemical vapors.
- Glove integrity can be compromised by some chemicals, detergents, heat, or sweat.
- A lab coat that is described as "flame resistant",
may not be chemical resistant or acid resistant.
- Most surgical masks do not effectively filter small particles from the air and do not prevent leakage around the edge of the mask when the user inhales
WHen selecting protective clothing remember:
- Change protective clothing when contaminated and remove after work is completed.
- Discard disposable protective clothing as hazardous waste.
- Institutions
should launder reusable laboratory coats.
- Do not take protective clothing out of the laboratory.
When selecting eye and face protection:
- Discard disposable eye and face protection with contaminated waste.
- Decontaminate reusable eye and face protection before reuse.
when using gloves:
- Change gloves when contaminated
or integrity is compromised.
- Do not wash or reuse.
- Remove gloves when work is completed and before leaving the laboratory.
- Dispose gloves with other hazardous laboratory waste.
Some general things to consider when selecting and using PPE include:
- Protective clothing and gloves should be changed when contaminated, and removed after work is completed.
- Do not take protective clothing out of
the laboratory.
- Disposable eye and face protection should be discarded with other contaminated waste.
- Training and practice on the use of PPE are critical for safe operations in the clinical laboratory. If not used properly, PPE may not provide adequate protection as designed.
- Always consult your laboratory SOPs and speak with your supervisor to identify respirator disposal and decontamination practices, as well as other specific PPE guidance required for your
laboratory.
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