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Environmental Emergencies
Mary Welch, DO
Electrical injuries
Types of Current
Direct:Electrons flow in one direction
Ex. Batteries

Alternating: Electrons flow bac...
Electrical injuries
Mechanism of Injury
Thermal Injury: Damage caused by heat due to
resistance to current resulting in in...
Cutaneous Injury
Skin burns
Exit and entry wounds
“Kissing Burns”- burns in skin creases due
to opposition of skin during ...
Musculoskeletal injury
Direct Current
Powerful Muscle spasm results in fractures
More like to to cause traumatic fractures...
Vascular injury

Venous Thrombosis
More common due to slower flow and less ability to
dissipate heat

Delayed Arterial Thr...
CNS injury
Seizure
Loss of consciousness and amnesia
Median nerve injury
Autonomic dysfunction
Pupils may be fixed and dil...
cardiac

DC injury can cause asystole
AC injury may cause Vfib
complications
Compartment syndrome
Cataracts
Rhabdo
Labial artery bleeding
Depression
Delayed neurologic symptoms
Similar ...
Work up
ECG
Labs: CE, CHEM, Total CK
UA for myoglobinuria
Imaging PRN
Compartment checks and pressures
PRN
Management

Cardiac monitoring
Fluid management
Be aware of possible fluid losses
keep UOP to 1cc/kg/hr

Fasciotomy or car...
Admission Criteria
ECG Changes
Loss of conciousness
Path of current possibly passed through
the heart
High voltage (>500V)...
Discharge

Low voltage injuries
No changes after 6 hours of monitoring
NO loss of conciousness
Lightening injuries

Massive unidirectional current
30% Mortality rate
70% Significant morbidity rate
Lightening injuries
Flashover burns are common
Ferning or Lichtenberg sign
Patient may be thrown significant
distances res...
Lightening injuries
Most common complications are related to
depolarization abnormalities:
Loss of consciousness
Seizures
...
management
Good prognosis if no respiratory or cardiac arrest
Massive fluid boluses not required due to little tissue
necr...
High Altitude illness

acute mountain sickness
acute mountain sickness

Caused by hypoxia
Decreased oxygen pressure increa...
acute mountain sickness
Signs and symptoms
Signs and symptoms

Headache
Nausea and vomiting
Insomnia
Decreased urination
P...
acute mountain sickness
Treatment
Treatment

Halt ascent
Acetazolamide
carbonic anhydrase inhibitor which aids in
acclimat...
management
Descent
Supplemental oxygen
Acetazolamide
Steroids
Portable hyperbaric chamber if descent not
possible
High Altitude illness

High altitude cerebral edema
High altitude cerebral edema
Altered mental status
Ataxia, confusion
R...
High altitude pulmonary edema

Most common cause of death from high
altitude illness
Due to hypoxia induced pulmonary
vaso...
edema

Occurs a few days after ascent
Symptoms worse at night
Cough
Decreased exercise tolerance
Low grade fever
Tachycard...
edema

Immediate descent
Oxygen
Calcium channel blockers
Acetazolamide for prophylaxis
Portable hyperbaric chamber if desc...
Diving Dysbarism
Pathology related to increases and decreases of
external pressure on the human body
Pressure and volume c...
Affects on
HEENT system
HEENT system
Middle Ear
Most commonly affected due to eustacian tube
dysfunction
Eustacian tube eq...
Affects on
HEENT system
HEENT system
Sinus Squeeze
Frontal sinus most commonly affected
Inflammation or blockage of sinus ...
Affects on
pulmonary system
pulmonary system
Lung volume equalized by appropriate inspiration
and expiration
Complications...
Complications from ascent
Pneumothorax
May develop hypotension due to tension PTX

Pneumomediastinum
Arterial gas embolism...
Air embolism
Due to rupture of air or nitrogen into pulmonary
vein
May present similar to pulmonary embolism
Suspect in an...
Decompression sickness
Dysbarism due to reformation of dissolved
nitrogen into gas bubbles in tissues
During descent oxyge...
Decompression sickness
risk factors
risk factors
Increased depth of dive and speed of ascent
Multiple dives in the same da...
Decompression sickness
Symptoms and signs
Symptoms and signs

Onset within 6 hours
MSK: Joint pain (“The bends”)
Pulm: Che...
Decompression sickness
Diagnosis
Diagnosis
Clinical diagnosis
Severe illness and arterial gas embolism
may be difficult to...
Decompression sickness
management
management
Administer 100% oxygen
IV hydration
Aspirin if not bleeding
Hyperbaric treatm...
Breathing gas under
high pressure
high pressure
Breathing oxygen or nitrogen at high partial
pressure is neurotoxic
Oxygen...
Breathing gas under
high pressure
high pressure
Nitrogen Narcosis
Risk begins at 100ft
Incapacitating at 300ft
Resembles a...
Radiation Injuries
Radiation: energy emitted when
change from higher energy state to
lower energy state in the form of
ato...
Radiation Injuries
ionizing radiation
ionizing radiation
Energy released from unstable atoms as
they decay to more stable ...
Radiation Injuries
non-ionizing Radiation
non-ionizing Radiation
All forms of electromagnetic radiation
except:
High energ...
Radiation Injuries

electromagnetic radiation
electromagnetic radiation
Self-propagating waves of energeny with
electric a...
Alpha

Radiation Injuries
Particulate radiation
Particulate radiation

Consists of 2 neutrons and 2 protons
Cannot penetra...
Radiation Injuries
signs and symptoms
signs and symptoms

Early vomiting correlates with radiation
exposure
c

LD 50/30: D...
Radiation Injuries
signs and symptoms
signs and symptoms

Hematopoietic Syndrome:
Destruction of bone marrow

Pancytopenia...
Radiation Injuries
Diagnosis
Diagnosis
CBC
Lymphocyte count at 48 hours is prognostic
Good prognosis >1500
Poor prognosis ...
Radiation Injuries
signs and symptoms
signs and symptoms

Decontamination

Removal of clothing, showers, and water

Blocki...
Animal bites
Human
Human
Direct bite or “Fight Bite”
Look for lacerations of the knuckle due to
contact with teeth
Xray
Fo...
Human Bites
Management
Management
Fight Bites
Irrigation and wound exploration in full range of
motion
Admit all infected ...
Human Bites
treatment of infection
treatment of infection

Cover skin flora and oral flora
Eikenella corrodens

Augmentin ...
cat and dog bites
Dogs and large animals cause crush
injuries
Look for underlying tissue damage and
fractures

Cats and sm...
cat and dog bites
causes of infection
causes of infection
Dogs: Staph>Strep>Eikenella>Pasteurella
Cats:
Pasteurella>Actino...
cat and dog bites
management
management
Thorough neurovascular and tissue exam
Treat underlying injury
If bite to the head...
cat and dog bites
Antibiotics
Antibiotics
Most cat bites should be treated
Dog bites should be decided on a case-bycase ba...
Snake envenomations
25 poisonous species of 2 major
families native to North America
Viperidae
Elapidae
Viperidae
Subfamily: crotalids or pit vipers
Subfamily: crotalids or pit vipers
Includes: rattlers, cottonmouths,
copperhe...
viperidae
Viperidae envenomation
signs and symptoms
signs and symptoms
Most bites are “dry”
Systemic Effects
Weakness, paresthesias
...
Viperidae envenomation
diagnosis
diagnosis
CBC
Coags
UA
Total CK
Check compartment pressures
XRay to rule out foreign bodi...
Viperidae envenomation
management
management

Antivenin

CroFab (Crotalidae polyvalent immune Fab)
Sheep product with few ...
Elapidae Family
Includes: Coral snakes, cobras and
mambas
Identified by:
Round pupils
Double row of plates at distal tail
...
Elapidae
Elapidae envenomation
signs and symptoms
signs and symptoms
Delayed for up to 13 hours
Patients may look deceptively well
...
Elapidae envenomation
management
management
Do not underestimate degree of
envenomation due to lack of initial symptoms
Al...
Spider Bites
Black Widow
Black Widow
Identification: red hourglass shape on ventral
abdomen
Symptoms and signs
Systemic
Au...
Black Widow Bite
Management
Management
Supportive Care
Analgesia
Treat cramps with benzos
IV calcium is discouraged

Antiv...
Spider Bites
Brown Recluse
Brown Recluse
Identification: violin-shaped markings on back
Symptoms and signs
May cause fever...
Brown Recluse
Diagnosis
Check labs for hemolysis, renal failure and DIC

Management
Consider anthrax in the differential
L...
Scorpion Stings
The “Bark scorpion” is the only potentially
letal scorpion species in the US
Found in: AZ, NM, CO

Signs a...
Scorpion Stings
treatment
treatment
Antivenin available for severe symptoms
Supportive care
Lethal jellyfish stings
Box jellyfish
Box jellyfish
Carry the most lethal marine toxin
Over 5000 deaths worldwide
Severe p...
Lethal jellyfish stings
Portugese man-of-war
Portugese man-of-war
Severe pain as if
being struck by
lightening
Rarely dead...
Lethal jellyfish stings
management
management

Remove and prevent unfired nematocysts
Wash with seawater or sterile saline...
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Environmental emergencies

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Environmental Emergencies Board Review Mary Welch 2013

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Transcript of "Environmental emergencies"

  1. 1. Environmental Emergencies Mary Welch, DO
  2. 2. Electrical injuries Types of Current Direct:Electrons flow in one direction Ex. Batteries Alternating: Electrons flow back and forth (60 Hz) Used in household outlets Generally more dangerous
  3. 3. Electrical injuries Mechanism of Injury Thermal Injury: Damage caused by heat due to resistance to current resulting in internal burns and edema Bone and fat have the highest resistance Mechanical Injury: Fractures and dislocations caused by muscle contractions or associated trauma Disruption of Depolarization May cause Seizures or arrhythmias Degree of injury related to voltage and duration of exposure
  4. 4. Cutaneous Injury Skin burns Exit and entry wounds “Kissing Burns”- burns in skin creases due to opposition of skin during tetanic contractions
  5. 5. Musculoskeletal injury Direct Current Powerful Muscle spasm results in fractures More like to to cause traumatic fractures Alternating Current Causes sustained contractions Flexor muscles more powerful than extensors resulting in patient being brought closer to the source More powerful internal rotators may result in posterior shoulder dislocation
  6. 6. Vascular injury Venous Thrombosis More common due to slower flow and less ability to dissipate heat Delayed Arterial Thrombosis May appear similar to compartment syndrome Mesenteric artery thrombosis
  7. 7. CNS injury Seizure Loss of consciousness and amnesia Median nerve injury Autonomic dysfunction Pupils may be fixed and dilated you cannot rely on pupillary exam to cease resuscitation
  8. 8. cardiac DC injury can cause asystole AC injury may cause Vfib
  9. 9. complications Compartment syndrome Cataracts Rhabdo Labial artery bleeding Depression Delayed neurologic symptoms Similar to ALS and transverse myelitis Delayed Lower extremity weakness
  10. 10. Work up ECG Labs: CE, CHEM, Total CK UA for myoglobinuria Imaging PRN Compartment checks and pressures PRN
  11. 11. Management Cardiac monitoring Fluid management Be aware of possible fluid losses keep UOP to 1cc/kg/hr Fasciotomy or carpal tunnel release PRN
  12. 12. Admission Criteria ECG Changes Loss of conciousness Path of current possibly passed through the heart High voltage (>500V) injury Transfer significant electrical injuries to burn centers
  13. 13. Discharge Low voltage injuries No changes after 6 hours of monitoring NO loss of conciousness
  14. 14. Lightening injuries Massive unidirectional current 30% Mortality rate 70% Significant morbidity rate
  15. 15. Lightening injuries Flashover burns are common Ferning or Lichtenberg sign Patient may be thrown significant distances resulting in traumatic injuries Tympanic membrane rupture (>50%) Cataract formation is common Deep tissue damage uncommon
  16. 16. Lightening injuries Most common complications are related to depolarization abnormalities: Loss of consciousness Seizures Cardiac arrhythmias Death caused by Vfib or asystole
  17. 17. management Good prognosis if no respiratory or cardiac arrest Massive fluid boluses not required due to little tissue necrosis If mass casualty highest priority are those in respiratory or cardiac arrest Continue resuscitation even if victims appear dead as they be unresponsive with fixed and dilated pupils Defibrillate to restore rhythm
  18. 18. High Altitude illness acute mountain sickness acute mountain sickness Caused by hypoxia Decreased oxygen pressure increases cerebral blood flow resulting in cerebral edema
  19. 19. acute mountain sickness Signs and symptoms Signs and symptoms Headache Nausea and vomiting Insomnia Decreased urination Peripheral or facial edema Retinal hemorrhage
  20. 20. acute mountain sickness Treatment Treatment Halt ascent Acetazolamide carbonic anhydrase inhibitor which aids in acclimatization Take 12-24 hours before ascent for prophylaxis Bicarbonate diuresis stimulates respiratory compensation Contraindicated in SSD and sulfa allergies Steroids for cerebral edema Descent for refractory cases
  21. 21. management Descent Supplemental oxygen Acetazolamide Steroids Portable hyperbaric chamber if descent not possible
  22. 22. High Altitude illness High altitude cerebral edema High altitude cerebral edema Altered mental status Ataxia, confusion Retinal hemorrhages Death due to brain-stem herniation All patients with altered mental status should be observed for ataxia
  23. 23. High altitude pulmonary edema Most common cause of death from high altitude illness Due to hypoxia induced pulmonary vasoconstriction
  24. 24. edema Occurs a few days after ascent Symptoms worse at night Cough Decreased exercise tolerance Low grade fever Tachycardia, Tachypnea Rales and ronchi
  25. 25. edema Immediate descent Oxygen Calcium channel blockers Acetazolamide for prophylaxis Portable hyperbaric chamber if descent not possible
  26. 26. Diving Dysbarism Pathology related to increases and decreases of external pressure on the human body Pressure and volume changes as a function of depth Boyle’s Law: pressure X volume = k (constant) At a set temperature pressure and volume are inversely related Governs all gases under pressure Atmospheric pressure doubles every 33ft under water
  27. 27. Affects on HEENT system HEENT system Middle Ear Most commonly affected due to eustacian tube dysfunction Eustacian tube equalizes pressure in middle ear Patients with eustacian tube dysfunction may have: pain, hematoma, TM rupture, vertigo Inner Ear Rapid ascent may cause rupture of the round window resulting in sudden hearing loss, vertigo and tinnitus Requires ENT consultation and surgical repair
  28. 28. Affects on HEENT system HEENT system Sinus Squeeze Frontal sinus most commonly affected Inflammation or blockage of sinus ostia and decreased sinus drainage may result in difficulties On descent the air in sinuses contracts resulting in negative pressure on sinus mucosa causing: edema, hemorrhage and pain On ascent expanding gas results in increased pressure in the fixed space of the sinuses Treat with decongestions, steroids and ABX if necessary Dental Pain due to air trapped in fillings
  29. 29. Affects on pulmonary system pulmonary system Lung volume equalized by appropriate inspiration and expiration Complications due to rapid descent Hemoptysis Complications due to rapid ascent Due to inadequate exhalation: Lung volume doubles every 33 feet, exhalation required to prevent injury Inexperienced divers may hold their breath
  30. 30. Complications from ascent Pneumothorax May develop hypotension due to tension PTX Pneumomediastinum Arterial gas embolism Management Treat PTX Hyperbaric treatment
  31. 31. Air embolism Due to rupture of air or nitrogen into pulmonary vein May present similar to pulmonary embolism Suspect in any diver who comes up unconscious Air embolism into coronary artery may cause MI Air embolism into brain presents similarly to CVA Requires immediate hyperbaric treatment and supportive care
  32. 32. Decompression sickness Dysbarism due to reformation of dissolved nitrogen into gas bubbles in tissues During descent oxygen and nitrogen is compressed Oxygen continues to be consumed by the body as nitrogen accumulates During ascent nitrogen bubbles form in tissues and joints resulting in vessel obstruction
  33. 33. Decompression sickness risk factors risk factors Increased depth of dive and speed of ascent Multiple dives in the same day Nitrogen lasts for 12 hours Air flight soon after dive Obesity Nitrogen is fat soluble Poor physical conditioning and strenuous exercise while under water
  34. 34. Decompression sickness Symptoms and signs Symptoms and signs Onset within 6 hours MSK: Joint pain (“The bends”) Pulm: Chest pain, cough, dyspnea (“The chokes”) Inner Ear: Vertigo, hearing loss, and nausea (“The staggers”) Spinal Cord: pins and needles sensation CNS: visual disturbances and HA Derm: pruritis and burning of skin, mottling and erysipelas-like rash over fatty areas
  35. 35. Decompression sickness Diagnosis Diagnosis Clinical diagnosis Severe illness and arterial gas embolism may be difficult to differentiate AGE presents suddenly with 10-20 min of ascent AGE only affects brain (NO spinal cord involvement) AGE can occur with short and shallow dives
  36. 36. Decompression sickness management management Administer 100% oxygen IV hydration Aspirin if not bleeding Hyperbaric treatment Prevention Slow ascent Limit depth or dive time No flying for 12-24 hours
  37. 37. Breathing gas under high pressure high pressure Breathing oxygen or nitrogen at high partial pressure is neurotoxic Oxygen toxicity Risk begins at 200ft Tingling Focal seizures Vertigo Nausea and vomiting
  38. 38. Breathing gas under high pressure high pressure Nitrogen Narcosis Risk begins at 100ft Incapacitating at 300ft Resembles alcohol intoxication Prevention Deep divers use mixtures lower in oxygen mixed with helium or hydrogen Management Rabidly reversible with ascent
  39. 39. Radiation Injuries Radiation: energy emitted when change from higher energy state to lower energy state in the form of atomic particles or waves
  40. 40. Radiation Injuries ionizing radiation ionizing radiation Energy released from unstable atoms as they decay to more stable state Able to break chemical bonds and form ion pairs May be electromagnetic or particulate Causes cellular injury by cleaving DNA strands and producing free radicles Induces genetic mutations and cancer
  41. 41. Radiation Injuries non-ionizing Radiation non-ionizing Radiation All forms of electromagnetic radiation except: High energy UV, Xray, gamma ray Includes radio wave, microwave infrared visible light and low energy UV
  42. 42. Radiation Injuries electromagnetic radiation electromagnetic radiation Self-propagating waves of energeny with electric and magnetic components Ionizing or non-ionizing Ionizing electromagnetic radiation includes: high energy UV, Xray, Gamma ray UV radiation
  43. 43. Alpha Radiation Injuries Particulate radiation Particulate radiation Consists of 2 neutrons and 2 protons Cannot penetrate skin Dangerous if internalized (ingested or inhaled), id decays when inside the body Beta High energy electrons Can penetrate skin and cause burns Penetration may be prevented by heavy clothing Internalization is dangerous Neutrons Generally from nuclear explosion Penetrates tissue causing radioactivity and damaging tissue
  44. 44. Radiation Injuries signs and symptoms signs and symptoms Early vomiting correlates with radiation exposure c LD 50/30: Dose causing 50% mortality in 30 days is 4.5 Gy No documented survival with >10 Gy Dermatologic Cutaneous burns from localized exposure Delayed blistering and desquamation weeks later
  45. 45. Radiation Injuries signs and symptoms signs and symptoms Hematopoietic Syndrome: Destruction of bone marrow Pancytopenia resulting in anemia, bleeding and infections Gastrointestinal Syndrome: Prodrome of N/V/D Symptoms worsen after 1 wk with dehydration, bloody diarrhea and sepsis Death within 3-10 days CNS Syndrome: Nausea, vomiting, ataxia Seizures, AMS Death within hours to days
  46. 46. Radiation Injuries Diagnosis Diagnosis CBC Lymphocyte count at 48 hours is prognostic Good prognosis >1500 Poor prognosis <1500
  47. 47. Radiation Injuries signs and symptoms signs and symptoms Decontamination Removal of clothing, showers, and water Blocking agents to reduce amount of absorbed radiation Potassium iodine prevents absorption by the thyroid Close wounds early to decrease infection risk Supportive care IVF Anti-emetics Leukocyte reduced blood transfusion if necessary Antibiotics and antivirals if neutropenic
  48. 48. Animal bites Human Human Direct bite or “Fight Bite” Look for lacerations of the knuckle due to contact with teeth Xray For closed fist injuries to rule out fractures which may require inpatient antibiotics Rule out foreign body
  49. 49. Human Bites Management Management Fight Bites Irrigation and wound exploration in full range of motion Admit all infected bites Consider admitting uninfected fight bites to ensure close follow up Antibiotics for all wounds with or without infection
  50. 50. Human Bites treatment of infection treatment of infection Cover skin flora and oral flora Eikenella corrodens Augmentin is recommended Other options: Clinda or erythromycin + doxy, keflex or cefuroxime Wounds on extremities should not undergo primary repair Consider prophylaxis for communicable
  51. 51. cat and dog bites Dogs and large animals cause crush injuries Look for underlying tissue damage and fractures Cats and smaller animals cause puncture injuries Wounds appear benign but have higher risk of infection
  52. 52. cat and dog bites causes of infection causes of infection Dogs: Staph>Strep>Eikenella>Pasteurella Cats: Pasteurella>Actinomyces>Bacteroides>F usobacterium Infection rate of 50-80%
  53. 53. cat and dog bites management management Thorough neurovascular and tissue exam Treat underlying injury If bite to the head in young children consider penetrating injury to the skull Neurosurgery consultation and admission if suspected Update Td Assess risk for rabies
  54. 54. cat and dog bites Antibiotics Antibiotics Most cat bites should be treated Dog bites should be decided on a case-bycase basis Regimens Augmentin Clinda + Cipro Clinda + Bactrim
  55. 55. Snake envenomations 25 poisonous species of 2 major families native to North America Viperidae Elapidae
  56. 56. Viperidae Subfamily: crotalids or pit vipers Subfamily: crotalids or pit vipers Includes: rattlers, cottonmouths, copperheads, and the western diamondbacks 98% of all US envenomations Identified by: Triangular-shaped head Nostril pits anteroinferior to eye Elliptical pupils Single row of plates at distal tail
  57. 57. viperidae
  58. 58. Viperidae envenomation signs and symptoms signs and symptoms Most bites are “dry” Systemic Effects Weakness, paresthesias Metallic taste Chest pain and dyspnea Local Effects Pain, erythema, edema, bullae Compartment syndrome and rhabdo Hematologic consequences Coagulopathy, thrombocytopenia, bleeding
  59. 59. Viperidae envenomation diagnosis diagnosis CBC Coags UA Total CK Check compartment pressures XRay to rule out foreign bodies
  60. 60. Viperidae envenomation management management Antivenin CroFab (Crotalidae polyvalent immune Fab) Sheep product with few allergic manifestations Administer to most patients Antivenin (Crotalidae) polyvalent Horse serum with higher risk of anaphylaxis and serum sickness Only for moderate to severe envenomations Consider fasciotomy for compartment syndrome Observe “dry bites” for 8 hours Admit all true envenomations
  61. 61. Elapidae Family Includes: Coral snakes, cobras and mambas Identified by: Round pupils Double row of plates at distal tail Brightly colored “Black on yellow kill a fellow, red on black venom lack”
  62. 62. Elapidae
  63. 63. Elapidae envenomation signs and symptoms signs and symptoms Delayed for up to 13 hours Patients may look deceptively well Local Symptoms Pain and edema may be limited Neurotoxicity causes predominate symptoms Blurred vision, ophthalmoplegia, ptosis, fasiculations, paresthesias and hypersalivation Late symptoms: paralysis of face, palate, jaws and vocal cords Respiratory failure from neuromuscular blockade
  64. 64. Elapidae envenomation management management Do not underestimate degree of envenomation due to lack of initial symptoms All Eastern and Texas coral snake bites should be treated with antivenin Micrurus fulvius antivenin Symptoms completely reversible Admit all coral snake bites
  65. 65. Spider Bites Black Widow Black Widow Identification: red hourglass shape on ventral abdomen Symptoms and signs Systemic Autonomic instability Hypertension and tachycardia Nausea and vomiting Neurologic Muscle cramps, Headache Severe abdominal pain Fasiculations and ptosis
  66. 66. Black Widow Bite Management Management Supportive Care Analgesia Treat cramps with benzos IV calcium is discouraged Antivenin only for severe symptoms Horse serum derived, may cause anaphylaxis and serum sickness
  67. 67. Spider Bites Brown Recluse Brown Recluse Identification: violin-shaped markings on back Symptoms and signs May cause fever, chills, malaise, and hemolysis “Bull’s eye” lesion: red and white, with a necrotic center May become so severe it requires plastic surgery Rarely hemolysis and renal failure result in mortality
  68. 68. Brown Recluse Diagnosis Check labs for hemolysis, renal failure and DIC Management Consider anthrax in the differential Local wound care Some evidence for dapsone (remember side effects) Supportive care
  69. 69. Scorpion Stings The “Bark scorpion” is the only potentially letal scorpion species in the US Found in: AZ, NM, CO Signs and Symptoms Localized pain and inflammation (most common) Neurotoxic Roving eye movements Opisthotonic posturing Paresthesias
  70. 70. Scorpion Stings treatment treatment Antivenin available for severe symptoms Supportive care
  71. 71. Lethal jellyfish stings Box jellyfish Box jellyfish Carry the most lethal marine toxin Over 5000 deaths worldwide Severe pain and spasms Parasympathetic overstimulation leads to cardiac arrest Paralysis, respiratory weakness and drowning
  72. 72. Lethal jellyfish stings Portugese man-of-war Portugese man-of-war Severe pain as if being struck by lightening Rarely deadly
  73. 73. Lethal jellyfish stings management management Remove and prevent unfired nematocysts Wash with seawater or sterile saline Fix nematocyst with household vinegar Remove tentacles with gloves and forceps Coalesce nematocyst with talcum powder or shaving cream then scrape off skin with knife Antivenin exists for box jellyfish from Australia but ineffective after symptom onset Supportive and local wound care Apply topical anesthetic, antihistamine or steroid Update TD
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