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Related Concept Videos

Allergic Reactions: Anaphylaxis01:30

Allergic Reactions: Anaphylaxis

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Anaphylaxis is a severe, life-threatening hypersensitivity reaction mediated by Immunoglobulin E (IgE) antibodies. When IgE binds to allergens, it triggers the release of mediators– histamine, leukotrienes, and prostaglandins from mast cells and basophils. These mediators cause vasodilation, edema, and inflammation, leading to various symptoms.The primary allergens causing anaphylaxis include food items (e.g., peanuts, shellfish), drugs (e.g., penicillin, asparaginase, corticotropin,...
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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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Adrenergic Agonists: Therapeutic Uses01:30

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Adrenergic agonists have diverse therapeutic uses across various medical conditions and emergencies.
Emergency and Intensive Care Unit (ICU) applications: Pressor agents increase blood pressure, heart rate, and contractility in shock and organ failure situations. Dopamine can induce vasodilation and stimulate adrenoceptors. Endogenous catecholamines are effective in treating cardiogenic shock. α2-agonists like clonidine can reverse anesthesia-induced hypertension.
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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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Measuring Local Anaphylaxis in Mice
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Anaphylaxis in children.

Karen S Farbman1, Kenneth A Michelson

  • 1Boston Children's Hospital, Division of Emergency Medicine, Boston, Massachusetts, USA.

Current Opinion in Pediatrics
|March 11, 2016
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This summary is machine-generated.

Epinephrine is the primary treatment for anaphylaxis in children. Early peanut introduction can prevent allergies, and clinical signs are key for diagnosis, not lab tests.

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Area of Science:

  • Pediatric Allergy and Immunology
  • Emergency Medicine
  • Clinical Review

Background:

  • Anaphylaxis is a severe, potentially fatal allergic reaction.
  • Accurate diagnosis and timely management are critical for pediatric patients.

Purpose of the Study:

  • To review current evidence on anaphylaxis diagnosis in children.
  • To outline best practices for anaphylaxis treatment and monitoring.
  • To discuss strategies for anaphylaxis prevention.

Main Methods:

  • Systematic review of recent scientific literature.
  • Analysis of clinical trial data and expert consensus.
  • Synthesis of evidence on diagnostic markers, therapeutic interventions, and preventative measures.

Main Results:

  • Clinical signs are more reliable than histamine or tryptase for anaphylaxis diagnosis.
  • Intramuscular epinephrine is the preferred route of administration.
  • Early peanut introduction significantly reduces the risk of peanut allergy.
  • Shortened emergency department observation is feasible for select patients.

Conclusions:

  • Epinephrine remains the cornerstone of anaphylaxis management.
  • Adjuvant therapies should not replace epinephrine.
  • Patient education on epinephrine autoinjector use is essential.
  • Risk stratification guides observation and admission decisions.