“Day of Disaster” Vertically Integrated Curriculum for...
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“Day of Disaster”Vertically Integrated Curriculum for
Medical Students
Robert H. Wagner, MD, FACNM, FACRProfessor of Radiology and Director NM
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Nuclear Power plants in Illinois – 5 in Northern Illinois, about 100 in country.Transfer of high level waste to permanent facility in Yucca Mountain – highway accidentsNow due to open in 2017Research LabsIndustrial sourcesTerrorist attacks (radiological or nuclear devices)Earthquakes!
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Almost nothing creates more terror than radiation
It’s invisible to touch, taste, and smellMost people have unrealistic ideas about radiationMost physicians don’t even understand itLittle if any training in radiation and radiobiology
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Nuclear Medicine and Radiation Therapy professionals are well trained in the fundamentals of radiationRespect it, but don’t fear itUnderstand what it can and cannot doThere have been industrial radiation accidents that we have learned much fromIt is easily detected in contrast to biological and chemical agents
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Chemical TerrorismAerosolized ricin (castor bean toxin)Blistering agents
PhosgeneMustard gas
Poisons – CyanideNeurotoxins – Sarin (Tokyo – 1995)
Effects are generally quick onset
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Biologic TerrorismSmallpoxAnthrax (Post 9/11/2001)PlagueBotulismTularemiaEbola
Experience with H1N1Symptoms may take days to appear
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Radiological/Nuclear TerrorismA true nuclear detonationA failed nuclear detonationRadiation dispersal deviceRadiation poisoning
Power Plant attacks (unlikely)
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Least likely scenario (fortunately)Most likely from a stolen nuclear weaponResults would be devastating, both psychologically and in terms of damage
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Red100% lethal zone – all buildings destroyedPink50% lethal – severe building damage-firesYellow10% lethal – mild-moderate damage – firesLight yellowFallout area – no wind
Effects of amodern thermonuclear weapon detonated over Chicago
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Most likely from an improvised nuclear device (IND)Beyond the scope of an individual terrorist –would need 10-15 peopleGreatest barrier is availability of weapons grade materialWould create a critical mass or explosion, but not the same degree as a true nuclear detonation.Nuclear material needs to stay in contact for a longer period of time to allow flux to form
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The most likely scenarioSimply a bomb loaded with radioactive materialsUses stolen hospital or industrial materialsAcute effects are limited to psychological and traumatic injuryLong term effects would be on contamination of large areasHuge expense for cleanup
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Chernobyl Comparison
Co-60 food irradiation pencil in a RDD
Radiation Levels•Inner ring – same as permanently closed around Chernobyl
•Middle ring – same as permanently controlled area around Chernobyl
•Outer ring – same as periodically controlled zone around Chernobyl
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Cancer DeathsCo-60 food irradiation pencil in a RDD
Increase risk of cancer•Inner ring – 1 per 100 people
•Middle ring – 1 per 1,000 people
•Outer ring – 1 per 10,000 people
Cancer affects 1 in 4 individuals (25%)Expected Cancer deaths per million 250,000
Inner ring – 260,000 (excess 1% lifetime risk)
Middle ring – 251,000 (excess 0. 1% lifetime risk)
Outer ring – 250,100 (excess 0. 01% lifetime risk)
Cleanup could exceed $2 Trillion
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The Weather
Direction of the wind can make all the difference.
Aerial photograph shows the smoke from 9/11 traveling south.
Normal wind direction (arrow) is northeast.
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Polonium 2105 million times more toxic than hydrogen cyanideOral LD50 – 50ngInhaled LD50 – 10ng1 gram – can poison 100 million – 50% will die1 gram in same place self heats to 500o CEstimated cost - $10 million to poison this man (10 times as much needed was used)
Alexander Litvinenko, 2006
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Alpha (microns)Helium NucleusPositively charged (+2)More common in the heavier elementsNo practical medical use (yet)Safe as long as it remains outside of body
Beta (millimeters)Negatively charged (negatron or electron)Positively charged (positron)Useful in therapeutic medicine (Radiation Therapy or Nuclear Medicine)Long term – large amounts can cause burns on skin
Gamma or X-Ray (centimeters)No chargeUseful in medical imagingLarge amounts required to cause biological changes
+2
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Time Exposure15 minutes 5 mR30 minutes 10 mR1 hour 20 mR2 hours 40 mR
Estimated exposure in a uniform area where the dose rate is 20 mR/hour
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1 m 2 m 3 m 4 m
1 R 0.250 mR 0.111 mR 0.0625 mR
1 1/4 1/9 1/16
Behaves according to inverse square law
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Isotope Percent Stopped
Tc - 99mIr – 192Cs – 137
78%14%
6%
Don’t wear one during an accident!(Weighs about 10 – 15 lbs)
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The risk of a spontaneous genetic disorder is 10%.10 Rads of Acute Gonadal Radiation will increase this risk by 0.005% to 0.075%.The increased Risk is between 1 in 1,300 to 1 in 20,000!
Source - SNM ReviewStochastic
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The lifetime risk of getting cancer is 40%The lifetime risk of dying from cancer is 22%Carcinogenesis from 10 Rads of Acute radiation is estimated at 1 per hundred people exposed.The increased risk for 1 Rad of radiation therefore is estimated at 1 in 1000!Assumption: Using linear no threshold model – worst case scenario
Source BEIR VII – 2006ACS - 2006Stochastic
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Normal100 mR – members of the public5,000 mR – radiation professionals
Do they apply during emergencies?
Urgent actions guidelines50 R or less total body75 R to an extremityLifesaving – may exceed these doses
LD 50/60 – 350 – 450 R Total body
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Not seen on initial presentationSymptoms and Syndromes
Prodrome - One to two daysLatent period - Variable, hours to weeksManifest illness - Severity proportional to exposureRecovery - Months to years
BurnsThermal or Chemical - acuteRadiation burns - delayed
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50%
100%
75%
25%
Effect of 100 R
50%
100%
75%
25%
Effect of 200 R
50%
100%
75%
25%
NeutrophilsLymphocytesPlatelets
Effect of 500 R
50%
100%
75%
25%
Effect of 1000 R
NeutrophilsLymphocytesPlatelets
NeutrophilsLymphocytesPlatelets
NeutrophilsLymphocytesPlatelets
0 3010 20 40 180
Days Post Exposure0 3010 20 40 180
Days Post Exposure
0 3010 20 40 180
Days Post Exposure0 3010 20 40 180
Days Post Exposure
Behavior of Blood Elements after Exposure
Non Stochastic
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Radiation Protection Drug Shows Promise In Animal TestsCBLB502 is a polypeptide derived from the whip like tails of the Salmonella bacterium and it binds to a cell receptor called TLR5 to trigger appropriate apoptosis-suppressing signal.The drug protected the mice against the effects of radiation on organs of the digestive tract and in blood cell producing bone marrow (protected against "gastrointestinal and hematopoietic acute radiation syndromes") and improved their survival.
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ConceptsExposure vs. ContaminationLocal vs. Total Body
Treatment of ExposureContamination: Internal vs. ExternalTreatment of Contamination
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Exposure Contamination
Standing near a septic tank
X-Ray Procedure
Medical Supply orFood Irradiator
Falling into a septic tank
Nuclear medicine procedure
Power plant or research lab
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The damage is already doneReconstruct the accident to determine dosageEffects depend on area exposedSurgical management may be needed for burns or long term complications.
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The damage is already done!Provide supportive careReconstruct accident to estimate the exposure level (biologic dosimeters)Reverse isolation may be neededFluid and electrolyte maintenanceFollow blood levels of platelets and WBC’sIf exposure is high, consider BMT (consult)
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1 mCi = 37,000,000 DPS (Becquerels)Bone Scan uses 25 mCiTypical levels of contamination < 10,000 CPM
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External (Done acutely)Remove contaminated clothingWash affected areasAvoid harsh agents that may compromise skin
Internal (Done later)Decontamination efforts require knowledge of the chemistry and biologic properties of the contaminantRequires that specimens were obtained initially
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Saturate the organStable iodine competes with radioactive iodine
Dilute the isotopeTritum behaves like water. Exchange the fluid compartment in the body.
Displace the isotopeCalcium competes with Strontium in binding with bone matrix
Bind or chelate the isotopeDTPA, EDTA, desferoxamine, penicillamine, Prussian blue. Use caution! Non specific.
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Worst one in history?Chernobyl
What is the second worst accident?Fukushima
…and the third?
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For battered Japan, a new threat: nuclear meltdown
Japan struggles with nuclear accident and tsunami aftermath
Fukushima Plants
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EarthquakeLevel 9.0 – plant designed to withstand 8.3Tidal wave – 30 feetPrimary power lossBackup power generators lost from tidal wave
Power PlantsShut downFuel remains heated (and radioactive)Spent fuel pools – cooling stoppedSaltwater used as emergent cooling
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http://www.iaea.org
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Thieves break into a warehouse containing medical equipmentSteal materials for scrap metalIncludes an old therapy source – Cs137
Powder mixed with phosphor – sparklesResidents of town find it amusing – later become sickDoctor from nearby town arrives
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Over 32,000 checked for contamination247 people demonstrated contamination6 people diedTopsoil removed from the town and currently stored above ground in canisters.Cs137 half life ~ 30 years
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Monitoring people for contamination at Olympic Stadium
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Key PersonnelLayout of a Radiation Emergency AreaNecessary EquipmentThe Plan
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Emergency Room NursesEmergency PhysicianNuclear Medicine Technologist or Radiation TechnologistSecurityPublic Relations – do not talk to the media!Housekeeping
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Surgeon (Trauma and Burns)Radiation TechnologistNuclear Physician, Radiologist and/or Radiation TherapistOncologist (If suspecting possible BMT)Internist (Other medical conditions)Legal Counsel
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TraumaBluntBlastPiercingCrushLacerations
Burns (chemical and thermal)Contamination – Internal and external
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Personal ProtectionMasks, Gowns and GlovesDosimetry
Specimen KitDecontamination KitHerculiteDecontamination Cart
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Specimen KitCotton tipped applicatorsSpecimen Containers - urine, stool, tissue, bandages, etc.ScissorsNail clippersLabels and markers
Decontamination Kit4 x 4’s and “Buff Puffs”“Chucks”Normal salineBetadinePhisohexPeroxideWash BasinsJohnson’s Baby Shampoo
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Patient ArrivalTriageRemove ClothingMedical ManagementRadiological Assessment
Document areas of ContaminationObtain Samples
• Decontamination• Final Survey• Patient Exit• Staff Exit
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Remember your A, B, C’s of emergency care.
AirwayBreathingCirculation………Radiation
Don’t be ashamed to follow the list.Don’t be afraid to ask questions.
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Remove your own badgeUse a provided badgeOnly needed in areas of suspected contaminationWear on inside of protective clothing
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Herculite
Stretcher
ER C
art
Ambulance
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Triage
AlternatePatient Route
Buffer Zone
Usual Patient Route R
EA
Ambulance RampClean TeamTransfer Area
Patient Care Area
Yellow Herculite
Green Herculite
Stanchions andRope
PatientCareArea
NursesStation
Loyola Emergency Room Layout
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Triage
AlternatePatient Route
Buffer Zone
Usual Patient Route R
EA
Ambulance RampClean TeamTransfer Area
Patient Care Area
Yellow Herculite
Green Herculite
Stanchions andRope
PatientCareArea
NursesStation
Loyola Emergency Room Layout
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Triage
AlternatePatient Route
Buffer Zone
Usual Patient Route R
EA
Ambulance RampClean TeamTransfer Area
Patient Care Area
Yellow Herculite
Green Herculite
Stanchions andRope
PatientCareArea
NursesStation
Loyola Emergency Room Layout
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Triage
AlternatePatient Route
Buffer Zone
Usual Patient Route R
EA
Ambulance RampClean TeamTransfer Area
Patient Care Area
Yellow Herculite
Green Herculite
Stanchions andRope
PatientCareArea
NursesStation
Loyola Emergency Room Layout
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The question of radiation causes fearMany people may arrive for evaluationTake care of the injured firstHow to manage a large group of worried otherwise healthy people?
Identify an area to house them (Olympic Stadium)No eating or drinkingObtain patient information and contact numberSystematically look for contaminationObtain samples (hands, nose and mouth swabs), CBC with differential if concern of large exposure
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HERCULITE
SSKI
WheelchairsTransporters
Bladder Power
MRIVan
Parking Lot Area
+/-
+
-
+/-
AssessDecontaminate
Arrival/Control/ID
To ER Fast Track Prophylaxis/Contact InfoHolding/Treatment/
Discharge
Ramp to MRI
Rope and stanchions
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Identify area by survey – document cts/minSteps
Wash with WARM waterDryResurvey
4 x 4’s to basin to patient to garbageRepeat until background activityIf contamination is stubborn, dry a different solution.Do NOT use harsh agentsIf all else fails, bandage the area and check later
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Who gets it?Dosage
Adults – 2 tabs (130 mg)Children 3-12 – 1 tab (65 mg)Infants – 3 yrs – ½ tab
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Make sure Nucmed MD and Rad Safety notifiedCheck that GM counter is available and workingPut on protective clothing – no lead apron!Prevent spread of contamination outside of REAIf possible wait for Nuclear Med physicians and Radiation Safety to arrive. If not….
Survey patient for areas of contaminationObtain samples of material for later analysisDecontaminate patient
Do not perform unless patient is stable!
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History:
53 yo male contractor working in a nuclear power plant during a scheduled outage. At 10:40 AM he slips and falls 30 feet. A health physicist and first aid are on the scene in several minutes. The patient is semiconscious and groaning with a contusion onhis forehead and a bump on his posterior skull.
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Time Line:10:40 AM Accident occurs10:45 AM HP and first aid on scene10:50 AM Control room calls EMS10:55 AM Control room calls hospital11:03 AM EMS arrives11:07 AM EMS departs11:45 AM EMS arrives at hospital (Not the closest hospital)
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En Route to Hospital:
Falling BP and chest painPt had history of MI x 2Sublingual nitroglycerine givenNo feeling in either foot, motion intact
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Hospital Response:
Good room setupProper gowning and dosimetry issuedFirst survey showed 1500 cpm on foreheadAll needed medical equipment in placePatient stabilized and transferred to the initial hospital that was passed.
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Patient Disposition:
Patient died 3 hours laterRuptured liver and spleenSubdural hematomaHemorrhage and shock
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Review:
•The “Golden Hour” was missed.•Patient should have gone to closest facility •M.D. was untrained, but E.R. nurses instructed.•Bioassay samples were not obtained.
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http://www.acr.org/
http://orise.orau.gov/reacts/
http://www.ready.gov