act001©. a a gent c c haracteristics and t t oxicology f f irst a a id and s s pecial t t reatment...
TRANSCRIPT
ACT001©
AA gentCC haracteristics andTT oxicology
FF irstAA id andSS pecialTT reatment ACT002©
Purpose of Purpose of CourseCourse
The intent of this course is to instruct emergency medical personnel on how to care for patients that may have been exposed to chemical warfare agents and assumed to have already been decontaminated. This course is designed primarily for Emergency Medical Technicians with basic life support credentials.
These individuals are referred to in the text as pre-hospital emergency medical personnel.
ACT002B©
To prepare you to recognize signs and symptoms, and provide initial emergency response treatment to patients injured by exposure to nerve and blister agents
GoalGoal
ACT003©
To assist in preparing for hazardous materials emergencies
GoalGoal
ACT004©
• Action items
• What trainees will be able to do at end of training
• Review with trainees
Instructional Instructional ObjectivesObjectives
ACT005©
• DESCRIBE initial first-aid treatment for victims of nerve agent exposure
• DESCRIBE initial first-aid treatment for victims of blister agent exposure
Required ObjectivesRequired Objectives
ACT006©
• DESCRIBE potential hazards of nerve agents
• DESCRIBE potential hazards of blister agents
• IDENTIFY signs and symptoms of nerve agent exposure
• IDENTIFY signs and symptoms of blister agent exposure
Supporting ObjectivesSupporting Objectives
ACT007©
• Designed to augment classroom instruction
• Self-paced review
• Self checks included
• Additional reference materials such as Material Safety Data Sheets included
Student ManualStudent Manual
ACT008©
• Self-checks
• Final quiz
EvaluationsEvaluations
ACT009A©
BACKGROUNDBACKGROUND
BACKGROUNDBACKGROUND
ACT010©
To familiarize you with chemical agent characteristics
PurposePurpose
ACT011©
• Comprised of chemicals designed and produced for warfare
• Primarily nerve agents and blister (vesicant) agents
Chemical StockpileChemical Stockpile
ACT012©
•
•
•• •
•••Hermiston, OR
Tooele, UTPueblo, CO
Aberdeen, MDNewport, INRichmond, KY
Pine Bluff, ARAnniston, AL
Chemical Stockpile Storage Chemical Stockpile Storage LocationLocation
ACT013©
U.S. Army ChemicalStockpile
InventoriesStorage Location Agent Stored
GA GB VX Mustard Lewisite Umatilla X X X Tooele X X X X X
Pueblo X Pine Bluff X X X
Newport X
Lexington- Blue Grass X X X
Anniston X X X Aberdeen X ACT014©
LOCAL RESPONSE LOCAL RESPONSE
INFORMATION AND INFORMATION AND
PROCEDURES PROCEDURES
LOCAL RESPONSE LOCAL RESPONSE
INFORMATION AND INFORMATION AND
PROCEDURES PROCEDURES
ACT015A©
• Specific and unique information requirements to be addressed
• Provide you with a framework for site-specific information
Local Response Local Response Information and Information and
ProceduresProcedures
ACT015B©
Community needs and resources vary a great deal from one storage location to the next. Therefore, YOUR input on how the emergency care elements in your community could best respond to a release with off-post consequences is important to the success of the program.
Your Input is ImportantYour Input is Important
ACT015C©
• This study guide does not, and cannot, cover everything you need to know in preparation for your role
• In short, you need to find out
— Who the local players are — The roles and responsibilities of each — The methods of response — What supplies and equipment are on hand — Standard Operating Procedures — Memoranda of Understanding or Agreement
What You Should Know What You Should Know That IS NOT in This Study That IS NOT in This Study
GuideGuide
ACT015D©
• Local emergency services
• Fire department or other emergency responders
• Ambulance service or other rescue services
• Hospital emergency department
• Local health department
Additional Information Additional Information ResourcesResources
ACT015E©
• Where is the first notification (identification) expected to come from?
• Who, from the facility, is notified?
• Who, from the local community, is notified?
• Who is likely to be the first on the scene?
If an emergency occurs at the installation that could affect the off-post population:
Local Community Local Community Response ProceduresResponse Procedures
ACT015F©
• What are the duties of the pre-hospital emergency medical personnel?
• What am I expected to do in this situation?
• Am I authorized in my state to administer antidotal medications (atropine, 2-PAM chloride)? Under what circumstances?
If an emergency occurs at the installation that could affect the off-post population:
Local Community Local Community Response Procedures Response Procedures
(Continued)(Continued)
ACT015G©
CHEMICALAGENTS
ACT017©
Information will help you in:
• Protecting yourself
• Treating patients
ACT018©
• DESCRIBE potential hazards of nerve agents
• DESCRIBE potential hazards of blister agents
• IDENTIFY most likely route of exposure
ObjectivesObjectives
ACT019©
AND EFFECTSCHARACTER STICSI
ACT020©
Nerve Agents
• Attack nervous system
• Scientific classification: Organophosphate
© Cinetel Productions
ACT021©
Name Common Name Referred to As
VX VX
GB Sarin GB or G-agent
GA* Tabun GA or G-agent
* Small amount stored at Tooele only
Specific NamesSpecific Names
ACT022©
• Usually liquid in normal state
• Volatile--generate vapors
• Potential for release if in vapor form
Physical PropertiesPhysical Properties
ACT023©
• Nervous system controls normal functions through use of chemicals
• Chemicals act as instructions to nerves, muscles, and glands
• Two forms of instructions: - stimulate (move or work) - relax (stop or rest)
• Nerve agent interferes with normal transmission of instructions
How Nerve Agents WorkHow Nerve Agents Work
ACT024©
• Over-stimulates nerve endings and central nervous system
• Causes muscles and certain glands to malfunction
Leads to Destruction of Leads to Destruction of System ControlSystem Control
ACT025©
• Nerve impulse transmitted
along nerve cells
Normal Nervous System Normal Nervous System FunctionFunction
ACT026A©
• Acetycholine (a neuro-transmitter) is released
• Target cell is stimulated
Normal Nervous System Normal Nervous System FunctionFunction
• Once target cell is stimulated, acetycholine is deactivated by acetylcholinesterase.
• Target cell relaxesACT026B©
• Nerve agents inactivate acetylcholinesterase
Nerve Agent InterferenceNerve Agent Interference
ACT027©
• Excess acytelcholine accumulates
• Muscle action becomes uncontrolled and twitchy
• Muscle can tire and collapse
• Gland continues to secrete sweat, tears, or mucus
• Inhalation
• Ingestion
• Direct contact
© Cinetel Productions
Routes Routes of of
ExposureExposure
ACT028©
© Cinetel Productions
InhalationInhalation
ACT029©
Respiratory failurechief cause of death
after severe exposure
Absorption through skin:
• All agents can be absorbed
• VX persists longer
• GB evaporates quickly, but still threat
• Scrape or cut in skin allows immediate entry
Entry also through eyes
© Cinetel Productions
Direct Direct ContactContact
ACT030©
© Cinetel Productions
• Access to bloodstream via digestive system
• Effects similar to inhalation, but at greater doses
IngestionIngestion
ACT031©
The critical route of exposure that you shouldbe most concerned with is
Inhalation Exposure From Inhalation Exposure From Atmospheric TransportAtmospheric Transport
ACT032©
*inhalation of agent vapors or aerosols*
• Poisons that destroy cells
• Blisters most noticeable effect
© Cinetel Productions
Blister Agents Blister Agents (Vesicants)(Vesicants)
ACT033©
Common Name Referred to as
Mustard H, HD, HT
Lewisite* L
*Small amount stored at Tooele only
Specific Specific NamesNames
ACT034©
• Form: Liquid or solid
• Volatile, burns well
H
HD
HT
Physical PropertiesPhysical Properties
ACT035©
• Chemical burns to skin–especially warm, moist surfaces
• Chemical burns to soft membranes
- Eyes
- Eye ball
- Lung tissue
- Mouth
- Throat
How Blister Agents WorkHow Blister Agents Work
ACT036©
• Delayed reaction, little or no pain
• Blisters develop in 2 to 36 hours
© Cinetel Productions
Mustard Agent ExposureMustard Agent Exposure
ACT037©
• Inhalation
• Ingestion
• Direct contact
© Cinetel Productions
Routes Routes of of
ExposureExposure
ACT038©
Can destroy mucous membrane lining of
• Nasal passages
• Throat
• Bronchial tubes
© Cinetel Productions
InhalationInhalation
ACT039©
Skin
• Highly damaging to skin—especially warm, moist areas
Mucous Membranes
• Very susceptible to effects of blister agents
• Includes: - lining around eyelids - inside mouth and nose
Sweat and moisture increase effect
Direct contact Direct contact With Liquid or VaporWith Liquid or Vapor
ACT040©
• If deposited on or in food items, drink, etc.
• Injures warm, moist tissues of mouth, throat and esophagus
© Cinetel Productions
IngestionIngestion
ACT041©
The critical route of exposure that you shouldbe most concerned with is
Inhalation Exposure From Inhalation Exposure From Atmospheric TransportAtmospheric Transport
ACT042©
*inhalation of agent vapors or aerosols*
• Chlorovinyldichloroarsine (organic arsenical)
• Different type of blister agent in Chemical Stockpile only at Deseret Chemical Depot
• Causes immediate pain upon skin or eye contact (unlike mustards)
• Suspected carcinogen
LewisiteLewisite
ACT043©
• Nerve agent characteristics:
- Stored as liquid (VX oily), generates extremely damaging vapors
- Highly damaging by direct contact (touch), inhalation (breathing of contaminated air), and ingestion (eating or drinking)
Key Points—Nerve AgentsKey Points—Nerve Agents
ACT044A©
H
HD
HT
• Blister agent characteristics:
- Stored as liquid (oily) or solid, generate damaging vapors
- Damaging by direct contact (touch), inhalation (breathing of contaminated air), and ingestion (eating or drinking)
Key Points—Blister AgentsKey Points—Blister Agents
ACT044B©
Most likely route of exposure:
• Inhalation of contaminated air
Key Points—ExposureKey Points—Exposure
ACT045©
SIGNS ANDSYMPTOMS
ACT046©
• Known information regarding accidental release
• Recognition of the event based on signs and symptoms
Size up situation based on . . Size up situation based on . . ..
ACT047©
• IDENTIFY signs and symptoms of nerve agent exposure
• IDENTIFY signs and symptoms of blister agent exposure
ObjectivesObjectives
ACT048©
Not all signs and symptoms may appear...
Dose, duration, and route of entry make a difference
Note!Note!
ACT049©
• Miosis (pinpoint pupils)
• Dim vision
• Respiratory trouble
• Localized sweating
• Wheezing
Constriction (Pinpoint)
Expansion (Dilation)
• Runny nose or excess salivation
• Stomach cramps, vomiting diarrhea
• Muscle cramps, twitching
• Heartbeat irregularities
Specific Signs and Specific Signs and Symptoms Symptoms
Of Nerve Agent ExposureOf Nerve Agent Exposure
ACT050©
• Generalized weakness
• Twitching spasms
• Convulsions and coma
• Other symptoms - Headache - Anxiety - Restlessness - Giddiness - Irritability
Mild:
Specific Signs and Symptoms Specific Signs and Symptoms Of Nerve Agent Exposure Of Nerve Agent Exposure
(continued)(continued)
ACT051©
• Reaction time depends on:
- type of agent involved
- amount of agent to which patient exposed
- dose (how much patient absorbed)
- duration
- route of exposure
- sensitivity of patient's system
Time Factor (Onset)
Factors Affecting Factors Affecting Signs and SymptomsSigns and Symptoms
ACT052©
• Reaction time is immediate if:
- moderate to large amounts inhaled
- moderate to large amounts spilled on skin
• Reaction time is delayed if:
- small amounts involved
- absorbed through skin in localized area
Time Factor (Onset)
Factors Affecting Signs and Factors Affecting Signs and Symptoms (Continued)Symptoms (Continued)
ACT053©
• Effects can occur after single breath
• Immediate response within seconds
• Peak effects within 15-20 minutes
© Cinetel Productions
Exposure Through InhalationExposure Through Inhalation
ACT054©
• Effects can develop up to 18 hours after exposure
• Absorption can continue and effects worsen for hours, even after decon
• Later onset, less likely to be lethal© Cinetel Productions
Exposure Through Skin Exposure Through Skin (Absorption)(Absorption)
ACT055©
• LD50 of VX is 10 milligrams/70-kg man (liquid on skin)
– Equals tiny droplet absorbed into 155-lb person
• LCt50 of VX is 30 milligrams-min/m (vapor inhalation)
– 50 times more toxic than cyanide gas
• LD50 of GB is 1.7 grams/70-kg man (liquid on skin)
• LCt50 of GB is 70 milligrams-min/m (vapor inhalation)
ToxicityToxicity
ACT056©
© Cinetel Productions
Respiratory failurechief cause of death
after severe exposures
LethalityLethality
ACT057©
Nerve Agent Exposure Nerve Agent Exposure LevelsLevels
Mild:
May also be effects of initial reaction which could lead to more serious effects
eyes: miosis, pain (deep in eye or head), dim or blurred vision
nose: runny
lungs: "tightness in chest”, bronchoconstriction, secretions in airways, cough, moderate
difficulty in breathing
ACT058A©
Nerve Agent Exposure Nerve Agent Exposure LevelsLevels
Moderate:
May also include symptoms under "Mild"
eyes: miosis, pain, dim or blurred vision
nose: runny (severe), nasal congestion
lungs: ”tightness in chest", breathing more difficult, secretions more abundant
muscles: feeling of generalized weakness , twitching of large muscle groups
GI: nausea, vomiting, diarrhea, cramps
ACT058B©
Severe:
May develop from symptoms under "Mild" and "Moderate"; or go directly to these symptoms
muscles: convulsions, weakness with eventual flaccid paralysis
lungs: cessation of respiration
all: loss of consciousness, coma, death
Nerve Agent Exposure Nerve Agent Exposure LevelsLevels
ACT058C©
Nerve Agent Exposure Nerve Agent Exposure LevelsLevels
Onset time: seconds to several minutes • Symptoms may occur after little more than one breath of vapor • Large amounts may cause reactions within seconds
• Effects do not worsen appreciably after 15-20 min following cessation of exposure
ACT058D©
Skin Exposure to Nerve Skin Exposure to Nerve AgentAgent
Mild:
May also be effects of initial reaction which could lead to more serious effects
skin: sweating at exposure site muscle: localized, unorganized twitching at exposure site (fasciculation)
ACT058E©
Skin Exposure to Nerve Skin Exposure to Nerve AgentAgent
Moderate:
May also include symptoms under “Mild”
muscle: generalized (at random, all over) fasciculation
and twitching; generalized weakness that increases with any form of activity
GI: nausea, vomiting, diarrhea
ACT058F©
Skin Exposure to Nerve Skin Exposure to Nerve AgentAgent
Severe:
May develop from symptoms under "Mild" and "Moderate"; or go directly to these symptoms
muscle: extremely weak; convulsions (seizures) with eventual flaccid paralysis
lung: cessation of respiration
all: sudden loss of consciousness and collapse, death
ACT058G©
Skin Exposure to Nerve Skin Exposure to Nerve Agent Time CourseAgent Time Course
Onset time: minutes to several hours • The larger the exposure the shorter the onset time • After large exposure, effects within minutes
• After asymptomatic period, first effect may be loss of consciousness • Onset time may be as long as 18 hrs after exposure; in such cases effects usually not lethal
ACT058H©
... refers to distinguishing one disease from another when they produce similar effects
Differential diagnosis . . .Differential diagnosis . . .
ACT059©
Signs and symptoms could also apply to:
• Epilepsy
• Gastroenteritis
• Exposure to agricultural insecticides (organophosphates and carbanates)
• Heat illnesses
• Emphysema
• Stroke
• Head trauma
• Drug overdose
Other Possible Causes of Other Possible Causes of SymptomsSymptoms
ACT060©
While liquid deposition of mustard agent or high concentrations of vapor are not expected, it is important to recognize the signs and symptoms of more severe exposures
Blister Agent Release Blister Agent Release PotentialPotential
ACT061A©
• Eye irritation and inflammation
• Photophobia
• Erythema
• Blisters
• Inflammation of respiratory tract
Specific Signs and Specific Signs and Symptoms of Mustard Agent Symptoms of Mustard Agent
ExposureExposure
ACT061B©
Normal skin
Reddened skin
Blistered skin
© Cinetel Productions
How Mustard Blisters SkinHow Mustard Blisters Skin
ACT061C©
Time Factor (Onset)
• Reaction time depends on:
- type of agent
- amount of agent to which patient exposed
- dose (how much patient absorbed)
- duration of exposure
- route of exposure
- sensitivity of patient's system
Factors Affecting Factors Affecting Signs and SymptomsSigns and Symptoms
ACT062©
Inhalation
• Effects occur after few hours latency
• Sneezing, coughing, bronchitis
Skin Absorption
• Effects delayed and absorption can continue for hours
Peak EffectPeak Effect
© Cinetel Productions
ACT063©
© Cinetel Productions
Peak Effect (Continued)Peak Effect (Continued)Toxicity
• LD50 is 7 grams/70-kg man (liquid on skin)
• Between 4 and 32 micrograms/70-kg man can cause blistering
• Vapor form 3 times more toxic than cyanide
Lethality
• Low (~3% in World War I)
• Chief cause of death: - Respiratory failure - Infections
ACT064©
skin: no immediate clinical effects (no burning, stinging, or redness); becomes "fixed" to the tissue within minutes, blisters appear about 2 to 36 hours later
eyes: within 4 to 12 hours after exposure, itching,tearing, conjunctivitis (reddening of tissuessurrounding the eyeball), sensation of grit inthe eye, burning and photophobia (sensitivityto light), some swelling of eyelids
Mild:
Mustard Agent Exposure Mustard Agent Exposure LevelsLevels
ACT065A©
Moderate:
Mustard Agent Exposure Mustard Agent Exposure LevelsLevels
skin: no immediate clinical effects; blisters appear sooner and are more severe than in cases of "mild" dose
eyes: in 3 to 6 hours; increased intensity from "Mild" symptoms;swelling of lids to the point of near closure; spasms of themuscles surrounding the eye; increased photophobia; blurred vision; possible discharge; miosis; severe inflammation of conjuctiva and cornea
ACT065B©
skin: no immediate clinical effects blisters appear sooner and are large necrosis skin charring (delayed)
eyes: severe pain increased swelling of lids to point of closure, discharge possible damage to cornea
Muscles: large amounts may affect nerve endings
Severe:
Mustard Agent Exposure Mustard Agent Exposure LevelsLevels
ACT065C©
Mild:
nose, throat and windpipe: burning sensation, sinus pain, cough GI: nausea and vomiting
Mustard Agent Exposure Mustard Agent Exposure Through Inhalation/IngestionThrough Inhalation/Ingestion
ACT065D©
Moderate:
nose, throat and windpipe: burning sensation
lungs: chest tightness, severe cough GI: nausea and vomiting, stomach pains
Mustard Agent Exposure Mustard Agent Exposure Through Inhalation/IngestionThrough Inhalation/Ingestion
ACT065E©
Severe:
nose, throat and windpipe: severe burning
lungs: difficulty breathing due to airway damage GI: nausea, vomiting, bloody diarrhea, stomach pains
muscles: large amounts may affect nerve endings
Mustard Agent Exposure Mustard Agent Exposure Through Inhalation/IngestionThrough Inhalation/Ingestion
ACT065F©
• Onset of symptoms may be delayed - initial signs/symptoms: 2 to 36 hrs, acute tracheobronchitis • Approximate for moderate exposure: - 2 to 4 hrs—chest tightness, hacking cough, hoarseness, sneezing - 4 to 16 hrs—sinus pain, increased respiration rate - 16 to 48 hrs—severe cough, unable to speak, very rapid breathing - 24 to 48 hrs—severe dyspnea, lung tissue hemorrhage, bronchopneumonia
Mustard Agent Exposure Mustard Agent Exposure
Time CourseTime Course
ACT066©
In spite of its chemical differences from mustard agents, Lewisite produces similar damage in bodytissues.
Lewisite Signs and Lewisite Signs and SymptomsSymptoms
ACT067A©
• When inhaled, vapor may produce mild to moderate irritation of upper respiratory tract
• May also cause sneezing
• Similar to mustard effects
— Except, in most severe cases, fluid may accumulate in lungs and ooze into lining of the chest cavity
Inhalation of Lewisite VaporInhalation of Lewisite Vapor
ACT067B©
• Immediate severe pain upon contact with eyes and skin (unlike mustard)
• Eyes can be severely damaged resulting in permanent injury of blindness
• More severe skin lesions than mustard
— Erythema followed by blistering over entire area of erythema
— Deeper injury to connective tissue and muscle
— Greater vascular damage
— More inflammation
Direct Contact with Direct Contact with Liquid LewisiteLiquid Lewisite
ACT067C©
• Systemic poison (liver and kidneys) at sufficiently large doses
• Has induced Bowen’s disease (slow-growing, usually nonfatal skin cancer)
Other EffectsOther Effects
ACT067D©
eye: prompt redness, swelling, irritation, immediate burning sensation, may cause inflammation of iris, corneal injury
nose: prompt irritation
respiratory tract: rapid irritation, hoarseness, loss of voice, cough; pneumonia, fever, accumulation of fluid in lungs, fluid between membranes liningchest cavity
Lewisite ExposureLewisite Exposure
ACT067E©
skin: prompt burning redness within 30 min, blisters on 1st or 2nd day; pain more severe and necrosis deeper than mustard
GI tract: diarrhea, nausea, vomiting, liver failure
cardiovascular system: shock after severe symptoms, anemia, concentration of blood
Lewisite Exposure Lewisite Exposure (Continued)(Continued)
ACT067F©
bladder: kidney failure
central nervous system: malaise, prostration, depression after severe symptoms
Lewisite Exposure Lewisite Exposure (Continued)(Continued)
ACT067G©
• Hay fever
• Chemical or thermal burns
• Heavy tear gas exposure
• Poison ivy, poison oak, and other contact allergies
Blister agent signs and symptoms could also apply to:
Other Possible Causes Of Other Possible Causes Of Signs and SymptomsSigns and Symptoms
ACT068©
• Specific signs and symptoms of nerve agent exposure
- Miosis
- Increased secretions
- Respiratory difficulty
• Not all signs and symptoms may appear
• Dose, duration, and route of entry can make difference
Nerve Agent SummaryNerve Agent Summary
ACT069A©
• Specific signs and symptoms of blister agent exposure
— Eye irritation and inflammation
— Erythema (skin reddening)
— Blisters
— Respiratory irritation and distress
• Not all signs and symptoms may appear
• Dosage, duration, and route of entry can make difference
Blister Agent SummaryBlister Agent Summary
ACT069B©
FIRST AID AND SPECIAL
TREATMENT
ACT070©
A Airway
B Breathing C Circulation
ABC’s OF Emergency CareABC’s OF Emergency Care
ACT071©
• DESCRIBE need for self protection when providing treatment for nerve or blister agent exposure
• DESCRIBE initial first aid treatment for victims of nerve agents
• DESCRIBE initial first aid treatment for victims of blister agents
ObjectivesObjectives
ACT072©
rule number one:
Protect yourselfProtect yourself
ACT073©
• Recognizing area with exposure potential and the zone set up to operate safely during the emergency
• Ensuring that the exposed person is completely decontaminated
You Can Protect Yourself By:You Can Protect Yourself By:
ACT074A©
Once chemical plume expected to cross borders of post:
• Initial hazard prediction given, identifying pattern and path of off-post exposure
• Emergency response and treatment teams established
Emergency Time LineEmergency Time Line
ACT074B©
• It is assumed that patients will have been decontaminated before being brought to EMS personnel in the cold zone
• Information regarding decontamination or removal from contaminated areas should not be interpreted as encouraging EMS personnel to go into the hot zone
• PPE may be required. The CSEPP training course, Personal Protective Equipment, describes the approved equipment and associated requirements
ACT074C©
• Essential part of treatment
• Prevents agent from doing further harm
• Prevents agent from spreading
Note: Should be accomplished before patient is brought to the treatment area
DecontaminationDecontamination
ACT075©
• Laws vary from state to state
• Be familiar with YOUR local and state laws
Administering DrugsAdministering Drugs
ACT076©
• Atropine
• 2-PAM chloride
Nerve Agent AntidotesNerve Agent Antidotes
ACT077©
Atropine EffectAtropine Effect
• Atropine blocks effects of over-stimulation
• Relieves smooth muscle constriction
• Dries up respiratory secretions
ACT078©
2-PAM Chloride Effect2-PAM Chloride Effect
• Removes organophospate from acetylcholinesterase which can then deactivate acetylchline
• Re-establishes normal skeletal muscle contraction• Relieves twitching and paralysis of respiratory muscles
ACT079©
Administration of Administration of AntidotesAntidotes
Dosage varies depending on age and weight of patient and severity of signs and symptoms
Dosages may need to be repeated at specified intervals– repeat atropine until patient is “atropinized”– repeat 2-PAM Chloride until maximum dose
per body weight is reached
ACT080©
Two Common ProblemsTwo Common Problems
Underdosage– administering too little antidote to
relieve agent effects– most serious problem: failing to
administer atropine when needed Administering antidote to patients
not exposed to nerve agent
ACT081©
Additional Drug Therapy— Additional Drug Therapy— DiazepamDiazepam
Administer to patients experiencing convulsions
Consider for patients with severe signs and symptoms
Dosage depends on patient’s age
ACT082©
• Make sure atropine warranted
• Administer dosages of antidotes as recommended in treatment tables
• Continue administering atropine as recommended in treatment tables until atropinization is achieved
• If needed, repeat dosage of 2-PAM Chloride as recommended in treatment tables until maximum total dose is given
Guideline For Guideline For Administering AntidotesAdministering Antidotes
ACT083©
• Secretions dry
• Breathing easy
Signs of AtropinizationSigns of Atropinization
ACT084©
Atropine OverdoseAtropine Overdose
Cause: Atropine administered when no prior nerve agent exposure has occurred
Not as serious as underdosing Not usually life-threatening
ACT085©
• Dilated pupils
• Dry mouth and skin
• Rapid pulse
• Flushed skin
• Difficulty urinating
• Confusion, delirium
• Temperature control diminished
• Intense thirst
• Restlessness
Signs and Symptoms Of Signs and Symptoms Of Atropine OverdoseAtropine Overdose
ACT086©
• Heat stroke
• Locoweed
• Atropine-like medicines
Other Possible Causes of Other Possible Causes of Symptoms Similar To Atropine Symptoms Similar To Atropine
OverdoseOverdose
ACT087A©
• Keep cool
• Protect from irrational actions
• Transport to hospital as soon as possible
Treatment for Atropine Treatment for Atropine OverdoseOverdose
ACT087B©
Auto-injectors approved for civilians by Food and Drug Administration
- Simple, compact, injection systems equipped with pre-measured amount (dose) of antidote
- Atropine auto-injectors approved for adults and children, but not infants
- 2-PAM chloride auto-injectors approved for adults only
Alternate Method of Alternate Method of Administration of AntidoteAdministration of Antidote
ACT088©
• Required only if exposure is severe
• Range from administering oxygen (if breathing is difficult) to providing ventilation, airway management and suction as needed
Respiratory SupportRespiratory Support
ACT089©
• If required, insertion of endotracheal tube by a qualified person is recommended
• Requires higher “pop off” pressure (70+ cm H2O)
Source: DOT Emergency Medical Care--Paramedic
VentilationVentilation
ACT090©
• Ensure patient is thoroughly decontaminated
• Take precautions for sterile technique
• Support airway management as necessary
After protecting yourself, immediately
Treatment For Exposure Treatment For Exposure To Blister AgentTo Blister Agent
ACT091©
• Flush eyes immediately
• Do not cover eyes with bandages
• Dark or opaque glasses provide relief from photophobia
SPEED CRITICAL!
- Tilt head to the side- Pull eyelids apart with fingers- Pour water slowly into eyes
Eye ContactEye Contact
ACT092©
Arm pits
Groin
Behind knees
Between toes
Pay special attention to
Around ears
Eyelids
Inside nose
Inside mouth
Neck creases
Skin ContactSkin Contact
ACT093©
InhalationInhalation
Supply respiratory support if needed for significant inhalation exposure
Administer oxygen as needed If breathing has stopped, resuscitate
the person Give intravenous fluids if needed, but
do not overloadACT094©
• Decontaminate exposed person immediately to avoid deep burns
• Antidote has been developed but is no longer manufactured
Treatment For Exposure to Treatment For Exposure to LewisiteLewisite
ACT095©
• PROTECT SELF
• Initial first aid for nerve agent exposure
- Give atropine, follow up with 2-PAM chloride - Support airway management as necessary - Atropine overdose possible if given when no nerve agent exposure occurred
• Initial first aid for blister agent exposure
- Ensure that patient is decontaminated - Take precautions for sterile technique - Support airway management as necessary
Key PointsKey Points
ACT096©