Letter to the Editor

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Rethinking treatment of mercury poisoning: the roles of selenium, acetylcysteine, and thiol chelators in the treatment of mercury poisoning: a narrative review

AbstractWe reevaluate the treatment of mercury poisoning, incorporating recent advances in understanding of mercury toxicity and the mercury:selenium interaction. This review focuses on: 1) the role, limitations and benefits of chelation (Unithiol, succimer and N-Acetylcysteine); 2) the role of selenium supplementation; and 3) how the different forms of mercury are impacted by use of chelation and selenium. Unithiol and succimer produce increases in urinary excretion of mercury and to a lesser degree blood and total body mercury. The primary role of N-acetylcysteine is increasing renal mercury excretion, similar to the thiol-chelators. Additional unique features of acetylcysteine include increased efflux of methylmercury from the brain, and reduced oxidative stress via increased glutathione production. The role of selenium includes: 1) restoration of selenoprotein activity, 2) protection against mitochondrial injury and DNA damage, 3) demethylation of methylmercury, 4) sequestering of mercury via Hg:Se complexes, and 5) redistribution of Hg inside organisms. Selenium may increase blood Hg, via a “sink” effect, causing a redistribution of mercury away from the brain. A combined approach for mercury poisoning treatment was developed focusing on restoration of selenoprotein function, reduction of oxidative stress and increased mercury elimination

Propafenone and valsartan overdose with cardiovascular deterioration managed with lipid emulsion and high dose insulin: a case report

AbstractThis is a case of a 23-year-old female who presented to the emergency department (ED) comatose after ingesting 7.8 g of propafenone and 11.7 g of valsartan. Upon arrival to the ED, the patient had seizures and required intubation. Several boluses of sodium bicarbonate were given as well as a continuous infusion to normalize QRS intervals. Norepinephrine and intravenous lipid emulsion (ILE) therapy were initiated. In the intensive care unit (ICU), the patient experienced persistent seizures and a 5-minute period of pulseless ventricular tachycardia. Subsequently, hyperinsulinemic-euglycemic therapy (HIET) was initiated. The patient received a 1 unit/kg intravenous bolus of regular insulin followed by a continuous infusion starting at 1 unit/kg/hr. Norepinephrine infusion was weaned off after 27 h of HIET. Within 48 h of presentation, the patient was transferred out of the ICU. This case exhibits the successful management of a mixed overdose with propafenone and valsartan utilizing a multimodal approach. In addition to supportive care, the patient received sodium bicarbonate, HIET, ILE and vasopressors to manage the cardiovascular collapse associated with these toxicities

Hydrocarbon ingestions among individuals younger than 20 years old reported to United States Poison Centers, 2000–2021

Abstract Background Hydrocarbon-based products have many household and commercial uses and exposure to these substances is common. Severe clinical effects can occur if these products are ingested. This study investigated the characteristics and trends of hydrocarbon ingestions reported to United States Poison Centers. Methods Data from the National Poison Data System were analyzed for cases of hydrocarbon ingestion among individuals < 20 years old reported to United States Poison Centers from January 1, 2000 through December 31, 2021. Results There were 284,085 hydrocarbon ingestions reported during the 22-year study period in which a hydrocarbon was the first-ranked substance. Most of these cases occurred among children < 6 years old (83.2%), males (64.6%), at a residence (96.5%), were single-substance exposures (98.3%), and were managed on-site rather than in a health care facility (74.9%). However, 4.5% of cases were associated with a serious medical outcome, including 34 deaths. Thirty-two deaths were among children < 6 years old and most were associated with aspiration. Gasolines accounted for 24.6% of total cases, followed by lubricating oils and/or motor oils (19.9%), other types of hydrocarbons (14.9%), lamp oils (11.3%), and lighter fluids and/or naphtha (10.3%). The rate of hydrocarbon ingestions among United States youth < 20 years old decreased significantly (p < 0.0001) by 66.5% from 2000 to 2021. The greatest rate decrease was observed among lamp oils (− 78.4%, p < 0.0001), followed by gasolines (− 75.9%, p < 0.0001). Conclusions Although the rate of hydrocarbon ingestions decreased during the study period and most reported cases resulted in non-serious outcomes, the number of cases remains high with a non-trivial minority (4.5%) of cases associated with a serious medical outcome, including death. Most deaths were among children < 6 years old. This underscores the need to increase primary prevention efforts, especially for young children