Marine Trauma and Envenomations Andrew Butterfass, MD FACEP Cabrini Medical Center Key Points • Identify Hazardous Marine Life. • Manage minor exposures. • Identify and stabilize major envenomations. Introduction • Marine life injuries are extremely diverse. • Many organisms are endemic to one region. • Most injuries occurs in populated costal waters or freshwater inland area’s. • High profile injuries include shark and alligator attacks. • Reality about 100 attacks a year worldwide with only about 5-10 deaths. Introduction • Traumatic Encounter – Bite or puncture with fin, spine, scale. – Examples- Shark, barracuda, alligators, moray eels, and sea urchins. – Cause direct and indirect injury by force and secondary infection. Introduction • Envenomation- toxin involved – Can cause hypersensitivity reactions, anaphylaxis and specific toxic venom reactions. – Puncture • Examples include Cone shells, Octopus, and Sea snakes. – Contact • Usually caused by invertebrates including coelenterates (jellyfish), sponges and bristle worms.. Coelenterates • Only 12 out of 500 species of jelly fish are venomous. • Reaction is dose and individual dependant. • Most Coelenterates cause local reaction. • Box Jelly Fish and Man-of-War are exceptions. Chinonex Fleckeri- Box Jellyfish Box Jellyfish Box Jellyfish Victim Box Jellyfish and Man-of-War • Box Jellyfish may be most potent marine envenomations. • Stings can be severe enough to cause loss of consciousness. • Sting can cause muscle cramps, abdominal pain, fever, chills, nausea, vomiting, respiratory distress, delirium, paralysis and death. • Most causes of death are from drowning secondary to panic or cardiovascular collapse. Man-of-War Nematocyst • Nematocyst- Stinging Cell activated by direct contact, changes in temperature and osmolality. • Initial response is pain or prickling. • Red hot and swollen rash with pustule and vesicle formation. • Venom is complex – Nerve conduction affects due to tetramine which is similar to curare. – Pain and local histamine effects are due to 5hydroxytryptamine. Nematocyst Coelenterate Sting Treatment • Initial treatment includes washing area with salt water. (fresh water will destabilize nematocysts.) • Denature the neomocyts with 5% acetic acid (vinegar) for 30 min. • Remove nematocyst with forceps. • Howell suggests using shaving cream and shaving affected area. Coelenterate Sting Treatment • Apply topical analgesics and steroids. • For extreme hypersensitivity and systemic reactions – ABC’s – IV analgesics and steroids if needed. – Cardiovascular monitoring and support as needed. Seabather’s Eruption • Jelly Fish Larvae- Linuche unguiculata • Contact Dermatitis • Occurs in eastern coast of Florida between March and August. • Puritic, erythematous, papules that appear in distribution of bathing suit. • Present within 24 hours of exposure, but may be delayed 3 to 4 days. • Treatment includes systemic and topical steroids and antihistamines. Seabather’s Eruption Seabather’s Eruption Sponges • Of 5000 known species, 12 are toxic. • Three produce contact dermatitis – Red-beard sponge Micronia prolifera. – Fire sponge Tedania ignis. – Poison-bun sponge Fibulila sp. • Treatment similar for jellyfish. • Small needle like spicules can be removed with piece of tape. Red-beard Sponge Fire Sponge Venomous Fish • 200 known species of venomous fish • Most Common – – – – – STINGRAY LIONFISH/SCORPIONFISH STONEFISH SALTWATER CATFISH WEEVERFISH Stingray • Cause tissue damage with sharp tail. • Tail has one to four sharp spines on dorsal surface. • Spines have membrane that tears to release venom. • Most injuries occur when ray is stepped on. • Spines are fired into foot or leg. Stingray Stingray Venom • Venom is Thermolabile. • Symptoms include blue discoloration at wound site secondary to vasoconstriction. • Intense pain at site, local ischemia and edema. • Systemic effects include -Salivation, sweating, vomiting, diarrhea, cramps, hypotension, and cardiovascular collapse. Stingray Envenomation Treatment • Keep person quiet- activity circulates venom. • Place constricting band above wound if on a limb (not tourniquet) • Venom is Thermolabile- Soak wound in hot water (110-113 degree F) for 30-60 minutes or until pain subsides. Heat denatures venom proteins. • Irrigate and remove any remaining spine. • Wound care including antibiotic coverage and tetanus prophylaxis. • Pain relief Lionfish/Scorpionfish Stonefish • Lionfish/Scorpionfish found in tropical seas including Red sea, Indian ocean and Pacific ocean. • Stonefish found in waters of Australian coast. Lionfish Stonefish Lionfish and Stonefish Treatment • Venom is similar to stingray. • Antivenin is available through the Australia Commonwealth serum lab. • Symptoms include immediate intense pain, erythema, cyanosis, edema, nausea, vomiting, hypotension, delirium and cardiovascular collapse. • Irrigate, debride and soak wound in hot water 3060 minutes to denature venom. • Analgesia and wound care. Saltwater Catfish • Found in the warm tropical of Indo-pacific. • Fins contain complex venom • Symptoms include Intense pain. Systemic response is rare, but may include muscle cramps, tremor, fatigue, syncope, and cardiovascular collapse. • Venom is thermolabile. • Wound care including broad-spectrum antibiotics (Vibrio species). Saltwater Catfish Weeverfish • • • • Found in English channel. Venom is on dorsal fin. Venom is thermolabile. Similar treatment to other fish. Weeverfish Sea Snakes • Found in warm tropical waters in the Indopacific and off the coast of Australia. • Air breathing and usually not aggressive. • Venom is extremely toxic. (more than cobra venom.) • Most sea snake bites can not penetrate a 1/8 inch wetsuit and do not envenomate with every bite. Sea Snakes • Venom is a heat-stable nonenzymatic protein. • Venom blocks acetylcholine. • Asymptomatic latent period of 10 minutes to 6-8 hours. • Symptom’s include malaise, anxiety, and stiffness. • Late symptom’s include aching, paralysis, trismus, ptosis, hepatic, renal, and respiratory instability. • Cardiovascular collapse and death. • 10% of untreated cases are fatal. Sea Snakes Sea Snakes Sea Snake’s Treatment • Immobilize site, soaking in hot water not effective. • ABC’s, may require hemodialysis and respiratory support. • Hospitalize and administer antivenin. • Polyvalent sea snake antivenin from Australia Commonwealth serum lab. • Use polyvalent land snake antivenin if sea snake antivenin is unavailable. Cottonmouth • Also know as Water Moccasin. • Snake found in fresh water area’s. • North American cottonmouth found in southern states as far north as Virginia and as west as Texas. • Aggressive, territorial snake with lightning-fast, bacteria-rich hemotoxic bite. • Symptoms include nausea, vomiting, hypotension, DIC, hemolysis, seizures and respiratory paralysis Cottonmouth Cottonmouth Cottonmouth Cottonmouth Cottonmouth Treatment • Remove jewelry and tight fitting clothing around wound. • Clean (Betadine), immobilize, pressure dressing. • Administer antivenin (horse serum, test for hypersensitivity,). • IV sedation, analgesics and antibiotics. • Do not use ice, tourniquets, incision and oral suction. Blue-Ringed Octopus • Found in costal waters of New Zealand and Australia. • Painless bite followed by abnormal sensation in mouth, neck and head. • Nausea, vomiting, dyspnea, and apnea. • May also have visual disturbances, impaired speech and swallowing, weakness and paralysis. Blue-Ringed Octopus Blue-Ringed Octopus Treatment • Neurotoxin blocks peripheral nerve conduction. • May need cardiovascular and ventilatory support. • Immobilize the affected limb. • Pressure dressing. • Clean bite- tetanus and antibiotic coverage. Cone Shells • Found in costal reef’s throughout the world. • Shelled animal have detachable, dart-like, muscular, extensible proboscis. • Venom is complex. It inhibits acetylcholine and effects sodium channels causing sustained contractions. • Venom is Thermolabile. Cone Shells Cone Shells Cone Shells • Stings usually occur on hand or foot. • Minor sting cause local blanching, cyanosis and edema. • Systemic findings include pain, numbness and paresthesia of mouth and lips. • Paralysis and respiratory failure possible. • No antivenin is available. Cone Shells Treatment • Immobilize the limb and apply pressure dressing (not tourniquet). • Soak in hot water 30 to 90 minutes. • Severe reactions including paralysis may require CPR and ventilatory support. • Edrophonium 10mg IV may be used for paralysis • Naloxone 2-4mg IV may help severe hypotension. (blocks beta-endorphin vasodepressor response. • Wound care including tetanus, analgesia, and antibiotics. Anaphylaxis • ABC’s – Airway protection – 100% Oxygen – Two IV lines- fluid resuscitation with RL or NS • Epinephrine 1:1000 .2-.5mg SC/IM • May repeat every 30min • In severe cases consider Epinephrine 1:10,000 .2.5mg IV. • Benadryl and Steroids IM/IV. General Wound Care • • • • Irrigate wounds and keep clean and dry. Pressure dressings. Remove any foreign bodies. Broad spectrum antibiotic coverage. (include Vibrio sp.) • Analgesia and steroids (topical or systemic). • Tetanus prophylaxis. Review • Remember ABC’s including c-spine immobilizations in suspected marine trauma. • Puncture wounds due to saltwater catfish, scorpionfish, sea-urchins, starfish, stingrays, cone shells and weever fish should be immersed in hot water (113 degree F) for 30-90 minutes or until pain subsides. Review • Treat rash associated with anemone, fire coral, jellyfish, and sponges with seawater bath or 5% acetic acid. • Handle and remove nematocysts with care. • Be prepared to treat anaphylaxis and cardiovascular instability. • Wound Care • Contact local poison control center or toxicologist for possible antivenin administration and transport of severe reactions. Drowning and Near Drowning Definition • Near Drowning – Suffocation by submersion, with at least 24 hours of survival. • Drowning – Death within 24 hours of suffocation by submersion.