Poisoning Flashcards
What doesn’t activated charcoal adsorb?
Metals - iron, heavy metals
Alcohols
Caustics
Lithium
Organophosphate insecticides Carbamate insecticides Nerve gas Myasthenia gravis medications Mushrooms (not amanita)
Cholinergic
Cholinergic Symptoms
SLUDGE - fluid from every orifice S alivation L acrimation U rination D efecation G astrointestinal E ye-miosis (small pinpoint) Other...
Antihistamines Antipsychotics Atropinics Tricyclic antidepressants Amanita mushrooms Jimson weed, deadly nightshade
Anticholinergic substances
Anticholinergic Toxidrome
Blind as a bat (mydriasis) - dilated pupils Hot as a hare (hyperthermia) Red as a beet (vasodilation) Dry as a bone (anhidrosis) Mad as a hatter (delirium)
4 stages of acetaminophen toxicity
1 - 0-24 hrs - N/V, anorexia
2 - 12-24 hrs - asymptomatic
3 - 2-7 days - fulminant hepatic failure
4 - 1-2 weeks - recovery
Rx: acetaminophen overdose
N-acetylcysteine +/- charcoal
Initiate up to 24hrs after ingestion
Ethanol
Ethylene glycol - antifreeze
Isopropranol - rubbing alcohol
Methanol
Alcohols
Alcohol Toxidrome
Inebriation CNS depression Seizures Hypoglycemia Miosis (variable)
Sx methanol
Blindness, pancreatitis, fixed dilated pupils
Sx isopropanol
Gastritis
Sx ethylene glycol
Renal failure
Rx: alcohol ingestion
Ethanol/isopropanol - supportive Ethylene glycol/methanol >20 - ethanol >50 - hemodialysis Alternative - Fomepizole (alcohol dehydrogenase inhibitor that prevents toxic metabolites)
Anticholinergic Rx
Charcoal
Physostigmine controversial - seizures, bradycardia, cardiac arrest
Benzodiazepines for agitation, seizures
Symptoms of Beta-blocker ingestion
Respiratory depression Bradydysrhythmias Hypotension Hallucinations Seizures Hypoglycemia
Rx B-blockers
Activated charcoal
Whole bowel irrigation
Glucagon for hypoglycemia, hypoTN and bradycardia
Atropine - bradycardia
Milrinone
Epinephrine - massive doses required to overcome beta-blockade
Ammonia > 5%
Sodium hypochlorite >5%
Laundry detergents
Drain openers
Alkali caustics
Drain openers
Toilet bowl cleaners
Rust removers
Oven cleaners
Acid caustics
Sxs of caustic ingestions
Mucosal burns Pain Drooling Stridor Refusal to eat or drink
Rx Caustics
Endoscopy Steroids? - no benefit Airway support Esophageal rest Esophageal replacement Increased risk for esophageal carcinoma with alkali (1000-3000x)
Battery ingestion rx
Esophageal - remove
Gastric - f/u xray, 4-7days
>23mm diameter - xray - 48hrs
Persistent gastric - remove
Sx of hydrocarbon ingestion
Dyspnea, tachypnea, hypoxemia
Wheezing, cough
CNS depression
N/V, abdominal pain
Hydrocarbon Rx
Observation
Admit if symptomatic, abn CXR or hypoxemia
Decontamination?
Iron toxicity
60mg/kg - moderate/severe
Iron toxicity serum levels
500mcg/kg - severe
Sxs of iron toxicity
WBC > 15,000
Glucose >150
V/D
Positive abdominal XR
4 Phases of Iron Toxicity
1 - <12hrs - N/V, diarrhea, GI bleed, rarely shock
2 - 6-36hrs - asymptomatic
3 - 12-48hr - liver failure, shock, metabolic acidosis, encephalopathy, death
4 - 4-8wks - pyloric or antral scarring and stenosis
Rx Iron Ingestion
Charcoal ineffective
Emesis if <6hrs (delayed gastric emptying)
Whole bowel irrigation
Deferoxamine 15mg/kg/hr IV - orange/pink urine, stop when iron clears