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CEN Exam test with 100- correct answers.
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CEN Exam test with 100- correct answers.
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CEN Exam 2024-2025test with 100% correct
answers
Black Widow - answer S/S: immediate sting, dull ache,
abdominal cramping, spams, HTN, tachycardia, N/V, weakness
Tx: ice, elevate, analgesics+benzos, antivenin with caution
Brown Recluse (Fiddleback) "violin shape" - answer S/S: painless
bite, pruiritis, redness, blister(1-3 hrs), bluish ring
fever, chills, n/v, malaise in 24 hrs
necrotizing ulcerating wound over time
Tx: wound care, removal of necrotic tissue, hyperbaric oxygen,
atbx, steroids
Pit vipers (Crotalid) - hemotoxic What snakes?, What do they
look like? - answer Diamond shape triagnular heads,
vertical/eliptical pupils, single row of caudal plates, fanks
,Rattlesnakes, copperheads, water mocassins
Signs of envenomation and treatment - answer pain, redness,
swelling, progressive edmea, blood-filled vesicles (canidiates for
antidote)
Tx: 2 large bore IV's, remove contrictive clothing and jewelry,
immobilize llimb neutral, antivenom if swelling severe, repeat
until swelling subsides NO ICE
Coral snakes (Elapidae) - answer "Red on yellow, kill a fellow.
Red on black venom lack"
Respiratory paralysis
S/S: respiratory distress, local paresthesia, diploplia, ptosis,
difficulty swallowing, increased salivation
Tx: supportive care, possible antivenom
Stingrays - answer Tx: immerse in warm waters (110 degrees F)
for up to 2 hours until relief of pain, remove with hemostats
Jellyfish - answer severe pain and red welts
Tx: NO WATER, rinse in normal saline and remove with forceps
,Dog Bites - answer associated with underlying crush injury
Tx: leave open, consider rabies prophylaxis or watch dog for
signs
Cat bites - answer highest rate of infection of animal bites,
Pasteurella in saliva->cellulitis/osteomyelitis
Tx: leave open unless on face, abx
Human Bites - answer Can transmit Hep B
Tx: copious irrigation/debridement, left open, bulky dressing,
abx
Decompression Sickness/Arterial Gas Embolism - answer
inadequate decompression after exposure to increased
pressure->bubbles in tissue causing local damage/"the bends";
if ascent is too fast
S/S: SOB, crepitus numbness, tingling, diploplia, petechial rash,
seizures, joint discomfort, pain
Tx: O2, fluids, analgesia, L. side Trendelenburg, hyperbaric
oyxygen, heliox
, Heat Cramps - answer sweat-induced electrolyte depletion-
>muscle cramps
Tx: rest, cool, IVF/electrolytes
Heat Stroke - answer decreased LOC
S/S: body temp >105.8 F affects CNS and cardiac
tachycardia, tachypnea, Hotn, hot/dry skin, decreased LOC
rhabo from muscle breakdown - dark brown urine
Tx: cool quickly to 102, cool IVfs, correct electrolye (Na+)
imbalances, benzos to prevent shivering
What medictions increase risk for heat stroke? - answer Haldol,
antihistamines, anticholinergics
Hypothermia - answer S/S: hypoventilation, AMS, shivering
(mild), Hotn, dysrhythmias (Osborn/J wave), bradycardua to V
Fib if severe
Tx: core rewarming (warmed IVfs, heated humidified oxygen,
warm peritoneal/gastric/colonic lavage, hemodialysis)
If mild can do passive external - heated blanket
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