Journal of medical toxicology : official journal of the American College of Medical Toxicology
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Comparative Study
Utilization of hyperinsulinemia euglycemia and intravenous fat emulsion following poison center recommendations.
Hyperinsulinemia euglycemia (HIE) and intravenous fat emulsion (IFE) may be beneficial in the treatment of calcium channel (CCB) and beta receptor (BB) antagonist toxicity. Many poison control centers (PCC) now recommend use. Healthcare providers may be unfamiliar with these treatments and may not institute them despite recommendations. ⋯ HIE and IFE are two therapies that are potentially beneficial in the treatment of BB and CCB toxicity. Current national organization guidelines for use are limited. Exploration of reasons for not following recommendations and additional efforts to improve clinician education regarding HIE and IFE may be required to increase the utilization of these potentially lifesaving antidotes.
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Methylene blue is used primarily in the treatment of patients with methemoglobinemia. Most recently, methylene blue has been used as a treatment for refractory distributive shock from a variety of causes such as sepsis and anaphylaxis. ⋯ There are some experimental and clinical experiences with the use of methylene blue as a selective inhibitor of the NO-cGMP pathway. Methylene blue may play a role in the treatment of distributive shock when standard treatment fails.
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Review Case Reports
L-Carnitine for the treatment of a calcium channel blocker and metformin poisoning.
The object of the current communication is to discuss the theory and the evidence for the use of L-carnitine in calcium channel blocker and metformin poisonings. ⋯ L-Carnitine combined with HDI may have helped with the calcium channel blocker (CCB) poisoning by decreasing insulin resistance, promoting intracellular glucose transport, facilitating the metabolism of free fatty acids, and increasing calcium channel sensitivity. It may have also stimulated oxidative utilization of glucose instead of converting pyruvate into lactate and contributed to decrease lactate production with metformin poisoning.
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Intravenous fat emulsion (IFE) therapy is a novel treatment that has been used to reverse the acute toxicity of some xenobiotics with varied success. We sought to determine how US Poison Control Centers (PCCs) have incorporated IFE as a treatment strategy for poisoning. A closed-format multiple-choice survey instrument was developed, piloted, revised, and then sent electronically to every medical director of an accredited US PCC in March 2011. ⋯ In a scenario with "shock" due to a single xenobiotic, directors stated that their PCC would "always" or "often" recommend IFE after overdose of bupivacaine (40 out of 45; 89 %), verapamil (28 out of 45; 62 %), amitriptyline (25 out of 45; 56 %), or an unknown xenobiotic (8 out of 45; 18 %). IFE therapy is being recommended by US PCCs; protocols and dosing regimens are nearly uniform. Most directors feel that IFE is safe but are more likely to recommend IFE in patients with cardiac arrest than in patients with severe hemodynamic compromise.