hazardous materialshealthtraining.inhs.org/uploadedfiles/ems_live_at... · niosh pocket guide to...
TRANSCRIPT
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Hazardous Materials
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HAZMAT Definition (USDOT)
“Any substance which may pose an unreasonable risk to health and safety of operating or emergency personnel, the public, and/or the environment if not properly controlled during handling, storage, manufacture, processing, packaging, use, disposal, or transportation.”
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Medical Roles
Size up incidentEstablish commandActivate IMSAssess toxicological risksEvaluate decontamination methodsTreat, transport patientsSupport HAZMAT team members (medical monitoring, rehab)
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Requirements and Standards
OSHA: CFR 1940.120EPA: 40 CFR 311NFPA: Standard 473 (Standard for Competencies of EMS Personnel Responding to Hazardous Materials Incidents)
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EMS HAZMAT Training Levels
AwarenessLevel 1Level 2
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Awareness
All responders who may arrive first on scene and discover hazardous substanceEMS, Fire, Law enforcementFocus
Recognition of HAZMAT incidentsBasic identification techniquesPersonal protection
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EMS Level I
Patient care in cold zone with NOsignificant 2o contamination riskFocus
Hazard assessmentAssessment, management of previouslycontaminated patients
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EMS Level II
Patient care in warm zone with significant risk of 2o contaminationFocus
Personal protectionDecontamination proceduresAssessment, management during decon
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Incident Size Up
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Size-Up Priorities
SafetyIncident stability (Stable vs. Unstable)Property conservation
Exposures—people, propertyRun-off
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Size-Up Special Considerations
Personal risk of exposure, contaminationDelayed product effectsScene topographyWind directionDecontamination corridor(s)Incident facility location contingency plans
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Incident Awareness
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Transportation
Transport incidents = HAZMAT riskDo NOT rely on placards!Passenger vehicles transport HAZMATKnow, preplan rail lines
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Fixed Facilities
ManufacturersWarehousesHardware storesAgricultural storesWater treatment plants
Loading docksPipelinesSilosBarnsGreenhouses
Know Your Community!
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Terrorism
WeaponsChemicalBiologicalNuclear
Potential TargetsPublic buildingsMultinational HQsShopping centersWorkplacesPublic assembly placesPlaces of worshipSchools
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Terrorism
Preplan potential targetsMultiple patients with similar signs, symptoms = High index of suspicionConsider secondary device, attack risk
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HAZMAT Recognition
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Clues
Occupancy, locationVehicle, container shapePlacards, other markingsLabelsScene appearanceOther sensory information
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Occupancy/Location
What do you know about the activities at this location?Are hazardous materials likely to be manufactured, stored, used there?Highway incidents are by definition a high risk situation!
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Vehicle/Container Shape
External ring stiffeners frequently are present on vehicles transporting corrosives or poisons.
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Vehicle/Container Shape
Rounded ends on highway transport vehicles suggest presence of pressurized contents.
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Vehicle/Container ShapeDome covers on rail tank cars suggest that the contents are under pressure.
Tank cars with flat ends have been insulated to control product temperature changes.
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Placards
DOT (transport vehicles)NFPA 704 (fixed facilities)
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DOT Hazard Classes
Miscellaneous (ORMs)9Corrosives8Radioactive materials7Poisons, etiologic agents6Oxidizers, organic peroxides5Solids4Liquids3Gases2Explosives1HAZARD TYPEHAZARD CLASS
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Explosives
Explosives: Designed to function with instantaneous release of gas and heat (i.e., by exploding).
Blasting Agents: Designed to explode, but require a blasting cap to trigger the explosion
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Gases
Anhydrous Ammonia is classified as a non-flammable gas However, it is flammable and highly toxic!
Chlorine gets its own placard because it is toxic, corrosive, and an oxidizer!
Poison A: Gases or liquids producing vapors highly hazardous to human health.
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Liquids
Flammable Liquid: Flash point < 100oF
Combustible Liquid: Flash point > 100oF
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Solids
Any solid material other than an explosive that is liable to cause fires through friction, through retained heat from manufacturing, or which can be ignited readily and when ignited burns vigorously and persistently.
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Oxidizers
Liquid oxygen is an oxidizer and a cryogenic agent.
Oxidizers will readily give up oxygen and support combustion. Organic oxidizers will readily give up oxygen, support combustion, and will burn!
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PoisonsClass B Poisons: Solids and liquids known to be so toxic as to afford a risk to human health or which, in the absence of adequate data are assumed to be toxic to man.
Irritants, substances that give off irritating fumes when heated or exposed to air, are included in Class 6, but are placarded only as DANGEROUS and only if >1000 pounds is present.
Etiologic agents are included in Class 6 but are not placarded.
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Radioactive MaterialsVehicles transporting radioactive materials are placarded ONLY if the packages contains material measures >50 millirem/hr on the entire package surface or >3 millirem/hr at 3 feet. (Radioactive III package labeling)
Defense material being moved under authority of the Department of Energy or Department of Defense is NOT placarded.
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Corrosives
Materials that attack and destroy living tissue or that produce severe corrosion of steel.
Frequently are also toxic and reactive.
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DangerousClass C Explosives
Irritants
Mixed motor vehicle loads of >1000 but <5000 pounds of all HAZMAT except Poison A, Poison B, Solid Dangerous when Wet, Explosive A, Explosive B, and Radioactive
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UN Numbers
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DOT Placard Limitations
ALL product hazards NOT indicatedIncorrect placardsAbsent placards
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DOT Placard Limitations
Some products NOT placardedRail flat car containers, motor vehicles, freight containers containing <1000 pounds of:
Nonflammable gasesChlorineFluorineLiquid oxygenFlammable gasesFlammable liquids
Combustible liquidsFlammable solidsOxidizers, organic peroxidesPoison BCorrosivesIrritating materials
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DOT Placard Limitations
“DANGEROUS”Rail flat car containers, motor vehicles, freight containers containing >1000, but <5000 pounds of:
Nonflammable gasesChlorine, FluorineLiquid oxygenFlammable gasesFlammable liquids
Combustible liquidsFlammable solidsOxidizers, organic peroxidesPoison BCorrosives
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DOT Placard Limitations
“DANGEROUS”IrritantsClass C Explosives
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NFPA 704
Used at fixed facilities
Health
Fire
Reactivity
SpecificHazard
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NFPA 704HEALTH
4 = Too dangerous to enter
3 = Extreme danger—Full protective clothing
2 = Hazardous—Breathing apparatus
1 = Slight hazard
0 = No hazard FIRE
4 = Extremely flammable
3 = Ignites at normal temperatures
2 = Ignites when moderately heated
1 = Must be preheated to burn
0 = Will not burn
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NFPA 704REACTIVITY
4 = May detonate—Evacuate area if fire present
3 = Shock, heat may detonate—Take cover
2 = Violent chemical change possible
1 = Unstable if heated
0 = Normally stable SPECIFIC HAZARD
OX = Oxidizer
ACID = Acid
ALK = Alkali (Base)
COR = Corrosive
W = Use NO Water
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NFPA 704
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DOT Labels
Placed on packages/containers
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Other Sensory Information
What do you see? Hear? Smell?Is there a vapor cloud?Is there a fire?Can you hear escape of a pressurized product?Any unusual odors?Are your eyes watering, burning?Are there dead animals, birds, fish observable?
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HAZMAT Identification
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HAZMAT Identification
Often most difficult part of incidentALWAYS use at least TWO concurring sources
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HAZMAT References
Emergency Response GuidebookContainer MarkingsShipping PapersMaterial Safety Data SheetsMonitors/Chemical TestsComputer Databases
Telephone HotlinesPoison CentersChemistsToxicologistsReference Books
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Emergency Response Guidebook
U.S., Canada, MexicoLists >1000 products with placards, UN numbers, chemical namesCross references emergency, evacuation procedures
Medical information is limited, very genericMultiple chemicals share UN numbers
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Container Markings
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Container Markings
“Candystriper”HCN Tank Car
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Shipping Papers
List specific substancesIndicate quantities carried
Operators may not take papers with themScene may be too unstable to retrievePapers may be incomplete, inaccurate
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Material Safety Data Sheets
Present at fixed facilitiesAvailable for ALLhazards on siteCover wide range of common, simple products
Typically list:Material nameCharacteristicsManufacturerHealth, fire, reactivity dangersSafe handling considerationsEmergency procedures
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Monitors and Testing
RadioactivityCombustibilityOxygen availabilitypH (Corrosiveness)Carbon monoxideHydrogen sulfideOrganic vapors
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Computer Databases
CAMEO®ALOHA®MARPLOT®OHMTADS®
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Telephone Hotlines
Chemical Transportation Emergency Center (CHEMTREC)Sponsored by Chemical Manufacturer’s Association (CMA)
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CHEMTREC Services
Emergency response informationAccess to manufacturer’s representativesActivation of specialized teams to deal with chlorine, phosphorus, vinyl chloride, HCN, HF, and LPGActivation of CHEMNET response teams
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CHEMTREC Limitations
Communicators NOT technical personnelWill NOT interpret data or go beyond what information sheets sayMust have product trade or chemical name to provide assistanceCannot provide information on effects of mixing of several products
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CHEMTREC Information Needed
What has happened?Where?When?Chemical(s) involvedContainer type conditionShipper/originCarrier
Consignee/destinationNature/extent casualtiesNature/extent property damagePrevailing weatherNature of incident areaCaller name/locationCall-back number
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Federal, State, Local Resources
FederalUS EPACoast Guard
StateTNRCCTDHRailroad CommissionParks & WildlifeAgriculture Department
LocalPoison ControlHealth DepartmentColleges, Universities
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Reference Books
NIOSH Pocket Guide to Chemical HazardsFarm Chemical HandbookChemical Hazards Response Information System(CHRIS)NFPA Fire Protection Guide on Hazardous MaterialsAmerican Association of Railroads Emergency Action Guides
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Reference Books
Condensed Chemical DictionaryDangerous Properties of Industrial Chemicals (Sax)Chemical Synonyms and Trade NamesMerck Index
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HAZMAT Terms
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HAZMAT ZonesHot Zone
Contamination PresentAppropriate PPELimited number of personnel
Everything inside considered contaminatedWarm Zone
Contamination Control ZoneAppropriate PPEDecon CorridorLife-Saving Emergency Care
Cold ZoneCP LocationTreatment/Transport AreasStagingMedical Monitoring/Rehab
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Boiling Point
Temperature at which a liquid becomes a gasMore technically, temperature at which a substance’s vapor pressure equals atmospheric pressure
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Flammable/Explosive Limits
Lower Explosive Limit = Lowest concentration of chemical that burns in airUpper Explosive Limit = Highest concentration of chemical that burns in air
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Flash Point
Lowest temperature at which a liquid will give off enough vapors to ignite
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Ignition Temperature
Lowest temperature at which a liquid will give off enough vapors to support ongoing combustionSlightly higher than flash point
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Specific Gravity
Density of a liquid compared to water (water = 1)Specific gravity >1 = Liquid sinks in waterSpecific gravity <1 = Liquid floats on water
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Vapor Density
Density of a vapor or gas compared to air (air = 1)Vapor Density >1 = Gas sinksVapor Density <1 = Gas rises
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Vapor Pressure
Pressure of vapor against container wallsIndicates how fast a liquid evaporatesHigher vapor pressures = Rapid evaporation
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Parts per million/Parts per billion
ppmppbConcentration of substance expressed in number of units of substance per 106 or 109 units of air or solution
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Threshold Limit Value/ Time Weighted Average
TLV/TWAMaximum concentration of toxin a person can be exposed to 8 hours a day, 40 hours per week without suffering adverse effectsLower TLV/TWA = Higher toxicity
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Threshold Limit Value/ Short-Term Exposure Limit
TLV/STELMaximum concentration of toxin a person can be exposed to for 15 minutes without suffering adverse effectsNot to be exceeded or repeated >4x daily with 60 minute rests between each exposure
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Threshold Limit Value/Ceiling Level
TLV/CLMaximum concentration of a toxin that should NEVER be exceeded, even for a moment
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Lethal Concentration/Lethal Dose
Concentration or dose of toxin that results in death of a defined % of test subjects
LCt50 = Concentration in air that kills 50% of test subjectsLD50 = Ingested, injected, absorbed dose that kills 50% of test subjects
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Immediately Dangerous to Life and Health
IDLHConcentration of toxin that causes immediate threat to lifeMay cause delayed or irreversible effectsMay interfere with person’s ability to self-rescue
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Contamination and Toxicology
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Contamination Types
Primary = Direct exposureSecondary = Indirect exposure via a contaminated person or object
Liquids, solids are most likely to produce secondary contamination.
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Exposure Routes
Inhalation (most common)AbsorptionInjection, including entry via open woundsIngestion (least common)
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Poison Actions
Acute Effects = Appear rapidly following exposureDelayed Effects = May not develop for hours, days, weeks, months, years
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Poison Actions
Local Effects = Involve areas immediately around exposure siteSystemic Effects = Occur throughout body as toxin is distributed by bloodstream
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Poison Actions
Major organs for handling toxinsLiver, metabolizes (biotransforms) toxinsKidney, excretes toxins
Since liver, kidney must concentrate toxins to manage them, damage frequently occurs
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Poison Actions
Synergism = Interaction of substances to produce greatly enhanced effects. (2+2 =40)Medications given to poisoned patients may produce unanticipated effectsTry to confirm medication safety with at least two independent sources
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Common Exposures
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Corrosives
Acids, alkalisCan be inhaled, ingested, absorbed, injectedSevere skin burns, respiratory burns with pulmonary edemaSome have systemic effects
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Corrosives
ManagementBrush off dry particulatesFlush with large amounts of waterOphthalmic anesthetics to facilitate eye irrigationTincture of green soap for skin contaminationAlbuterol for bronchospasmDo NOT induce vomiting in ingestionsIf patient can swallow/is not drooling, dilute with 5cc/kg up to 200cc
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Pulmonary Irritants
Include chlorine, ammoniaGases react with water in respiratory secretions to form acids, alkalisTissue damage, pulmonary edema may result
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Pulmonary Irritants
ManagementRemoval of clothingFlushing of skin, eyesHigh concentration oxygenAlbuterol for bronchospasmsPossible intubation to protect airwayPEEP for non-cardiogenic pulmonary edema
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Pesticides
OrganophosphatesCarbamates
Acetylcholinesterase (AChE) Inhibitors
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AChE Inhibitor Pesticides
SalivationLacrimationUrinationDefecationGI CrampingEmesis
BradycardiaBronchospasmIncreased respiratory secretionsSweatingPinpoint pupilsMuscle fasiculationsParalysis
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AChE Inhibitor Pesticides
ManagementSupport ABCsRemove all clothing, jewelryDecontaminate with H2O, tincture of green soapAtropine to reverse SLUDGEPralidoxime for organophosphates, but NOT carbamatesDiazepam to control seizuresDo NOT induce vomiting if ingested
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Chemical Asphyxiants
Carbon monoxideCyanide
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Carbon monoxide
MechanismBinds to hemoglobinAffinity 200x > O2
Reduces oxygen transport capacity
ManagementHigh concentration O2
Hyperbaric oxygen therapy
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Cyanide
SourcesHCNKCNSodium nitroprussideBitter almond oilWild cherry syrup
MechanismInhibits cytochrome oxidaseStops electron transport, ATP production
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Oxidative Phosphorylation
NAD NADH2
2H
FAD FADH2
Ox. Cyt. b Red. Cyt. b
Ox. Cyt. c Red. Cyt. c
Ox. Cyt. a Red. Cyt. a
Red. Cyt. a3Ox. Cyt. a3
1/2O2
2H+
H2O
ADP + Pi
ADP + Pi
ADP + Pi ATP
ATP
ATP
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Cytochrome Oxidase
Fe2+Fe3+ 2H+
2e-
2e-
1/2 O2
H2O
Cytochrome a
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Cyanide Toxicity
Fe2+Fe3+ 2H+
2e-
2e-
1/2 O2
H2O
Cytochrome a
CN-
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Cyanide
ManagementHigh concentration oxygenCyanide kit
Amyl nitriteSodium nitriteSodium thiosulfate
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CN-
Cyanide Antidote
Fe3+ Fe2+ 2H+
2e-
2e-
1/2 O2
H2O
Cytochrome a Fe2+ Fe3+CN-NO2 -
SCN-
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Hydrocarbon Solvents
ExamplesXyleneTolueneMethylene chlorideGasolineKeroseneNaptha
EffectsPulmonary edemaRespiratory failureArrhythmiasCNS depressionSeizuresLiver, kidney damageSkin irritation
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Hydrocarbon Solvents
ManagementSupport ABC’sHigh concentration oxygenWash skin with water, tincture of green soapGenerally, do NOT induce vomiting if ingestedDiazepam for seizuresGlucose for hypoglycemia 2o to liver damageUse caution with all catecholamines; ventricular arrhythmias may occur
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Decontamination
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Decon Purposes
Reduce patient exposure/doseReduce secondary contamination risk
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Decon Types
PhysicalChemical
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Decon Methods
DilutionAbsorptionNeutralizationIsolation
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Dilution
Washing with large amounts of waterLowers chemical concentration to non-hazardous levelMay be aided by use of a soapSome chemicals should NOT be mixed with water
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Absorption
Use of pads/towels to “blot” up materialUsually absorbed after washingNot used as primary method of deconCommonly used to clean environment
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Neutralization
Chemical decontamination methodReaction with another substance neutralizes hazardSeldom used
Difficult to select proper neutralizerDifficult to apply in correct amountReactions frequently generate heat
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Isolation/Disposal
Separating people, equipment from hazardous substanceRemoval of clothing, jewelry, etc.
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Decon Decision Making
Fast BreakLong Term
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Fast Break
Quick decisions to prevent rescuer, equipment contaminationUsed on incidents with:
Patients who have self-rescuedCritical patients out of hot zone needing immediate careUnknown materialsPotentially life-threatening materials
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Fast Break
Do NOT expose yourselfContain, isolate patientsRemove clothing, if possible by having them undress themselvesWash with large amounts of waterWrap completely in blankets (human burrito)
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Fast Break
What are the risks associated with immediate care?What are the benefits of the patient receiving immediate care?
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Fast Break
As incident evolves:Can/should runoff be contained?Controlled decon facilities?Patient privacy?Reclothing patients? (scrub suits)
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Long Term
Occurs when patients remain in hot zoneRescue performed by hazmat teamIMS, decon corridor will have to be established before rescue is attemptedSet-up can take up to 60 minutes
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Long Term
Allows for:More complete decontaminationBetter PPELess risk of secondary contaminationGreater environmental considerationFewer opportunities for error
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Access/Decon Corridor
ColdWarm
Hot
Access Corridor
Decon Corridor
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Access/Decon Corridor
Access
Responder Decon
Patient Decon
Medical Monitoring
Rehab
Treatment Area
Command Post
Transport Area
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Decon Agents
WaterTincture of Green SoapIsopropyl Alcohol (isocyanates)Vegetable Oil (water-reactive substances)
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Two Step Decon Process
Gross decontaminationUsed for “fast-break” situationsProcedure
Remove all clothing, jewelryWash, rinse with soap/water x 2Be sure patients do not stay in runoffWrap in blanket
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Eight Step Decon Process
More thoroughRequires complete decon corridor
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Eight Step Process
Rescuers enter deconcorridor; mechanically remove victim contaminantsRescuers drop equipment in tool-drop; remove outer gloves
Decon personnel shower, scrub all victims/rescuersRescuers remove, isolate SCBA
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Eight Step Process
Rescuers remove protective clothingRescuer, victim personal clothing removed
Rescuers, victims receive full-body wash with soft brushes, water, mild soapPatients assessed, treated before transport; Rescuers medically monitored
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Difficult Contamination Areas
Scalp, hairEarsNostrilsAxillaFingernailsNavel
GenitalsGroinButtocksBehind kneesBetween toesToenails
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Transport Considerations
Patients field decontaminated are only semi-decontaminatedMay harbor latent contaminants, may outgas contaminants in body fluidsLimit number of ambulances used in transportRemove non-essential equipmentWrap patient in plastic sheeting, blanketsCover floor with plastic sheeting
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Transport Considerations
Better Dirty and Alive than Clean and Dead!
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Transport Considerations
Do NOT assume your hospitals are equipped to
handle contaminated patients
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Transport Considerations
Preplan transport of contaminated patients to hospitals
Hospitals may want contaminated patients delivered to location other than usual ER entranceHospitals need adequate warning to prepare to receive these patients. Alert should come when first EMS unit arrives at the scene.
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Protective Equipment and Medical Monitoring
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Protective Equipment Types
Level ALevel BLevel CLevel D
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Level A
Highest level of respiratory/skin protectionSuit fully encapsulates rescuer, SCBAUsed in hot zone with:
Unknown substancesSubstances with potential for respiratory and skin absorption hazards
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Level A
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Level B
Full respiratory protectionLower skin protection levelSuit non-encapsulating, but chemically resistantSCBA worn outside of suitTypically worn in warm zone by decon team
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Level C
Non-permeable suit, boots, hand, eye protectionAir-purifying respirator with cartridges for specific substancesWorn during transport of patients with 2o
contamination risk
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Level D
Firefighter turnout gearNOT suitable for HAZMAT incidents
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Selection of PPE
Based on chemical involvedNO single suit material is appropriate for all chemicalsPermeability charts should be consulted to determine breakthrough times for suit material
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Selection of PPE
Latex gloves are NOT chemically resistantNitrile gloves have high resistance to most chemicalsLeather boots will absorb chemicals permanently
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Medical Monitoring & Rehab
A primary role of EMSEntry team personnel should have annual physicals with baseline vitals on file
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Entry Readiness
MonitorBPPulseRespiratory rateTemperatureBody weightECGMental/neurological status
Abnormal findings prohibit entryPre-hydrate with 8 to 16 oz of water or diluted sports drink
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After-Exit Rehab
MonitorBPPulseRespiratory rateTemperatureBody weightECGMental/neurological status
Use weight loss to estimate hydration statusRehydrateDo NOT permit reentry unless:
AlertNon-tachycardicNormotensiveNormothermicWithin reasonable percentage of normal body weight
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Hazardous materials questions:
1. List five indicators Hazardous Materials may be present.
2. The D.O.T. Placarding system is to transportation as the ____________________ is to fixed facilities.
3. The three categories of exposure reduction to Hazardous Materials are:
4. The four types of decontamination are:
5. List three of the six considerations to keep in mind prior to transporting Hazardous materials contaminated patients.
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Contact:
Renee Anderson601 W. First AvenueSpokane, WA 99201509-232-8155 (d) 509-232-8344 (f)[email protected]