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anaphylaxis    
n. 过敏性反应

过敏性反应

anaphylaxis
n 1: hypersensitivity reaction to the ingestion or injection of
a substance (a protein or drug) resulting from prior
contact with a substance

anaphylaxis \an`a*phy*lax"is\ n.
([a^]n`[.a]*f[imac]*l[a^]k"s[i^]s or
[a^]n`[.a]*f[i^]*l[a^]k"s[i^]s)
1. [Gr. 'ana` back, way from fy`laxis security,
protection.]

1. (Med.) Hypersensitivity (to a foreign antigen) resulting
from prior contact with the same or a related substance.
[WordNet 1.5 AS]

2. (Med.) An immediate but transient systemic reaction to an
antigenic substance to which a person has become
hypersensitized; it is characterized by the contraction of
smooth muscle and capillary dilation. --[Stedman]
[PJC AS]

Note: The cascade of events is triggered by binding of the
foreign antigen to immunoglobulin E and release of
mediators such as histamine, bradykinin, serotonin, and
slow-reacting substance from mast cells. It involves
more than one organ system. The most commonly involved
organs are skin, cardiovascular, respiratory and
gastrointestinal systems. Anaphylaxis is manifested by
a range of signs and symptoms including pruritus,
urticaria, itching, dyspnea, abdominal pain and
cardiovascular collapse (shock). A severe form of the
reaction is called {anaphylactic shock}. --[Stedman]
[PJC AS]

3. (Med) Anaphylactic shock.
[AS]


anaphylactic shock \anaphylactic shock\ n.
([a^]n`[.a]*f[imac]*l[a^]k"t[i^]k sh[o^]k`) (Med.)
Shock resulting from anaphylaxis[2]. It is a severe form of
physiological shock, often having a fatal outcome, and is
caused by an extreme immunological reaction to antigens. It
is characterized by smooth muscle contraction and capillary
dilation throughout the body, initiated by antibodies of the
IgE class. It is usually seen when an antigen to which a
person has become hypersensitized is injected intravenously
or subcutaneously. It is also called {generalyzed
anaphylaxis} or {systemic anaphylaxis}, and sometimes
{anaphylaxis}. --[Stedman]
[PJC AS]


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  • Anaphylaxis - Symptoms causes - Mayo Clinic
    Anaphylaxis, a severe allergic reaction, is an emergency Learn who's at risk, what to watch for and what to do when it occurs
  • Anaphylaxis - Diagnosis treatment - Mayo Clinic
    Anaphylaxis, a severe allergic reaction, is an emergency Learn who's at risk, what to watch for and what to do when it occurs
  • Anaphylaxis: First aid - Mayo Clinic
    A life-threatening allergic reaction called anaphylaxis can cause shock, a sudden drop in blood pressure and trouble breathing In people who have an allergy, anaphylaxis can happen minutes after exposure to a specific allergy-causing substance, called an allergen
  • Allergies - Symptoms and causes - Mayo Clinic
    Some types of allergies can trigger a severe reaction known as anaphylaxis Certain foods, insect stings and medicines are among the allergens that can set off this life-threatening emergency
  • Anafilaxia - Síntomas y causas - Mayo Clinic
    Los síntomas de anafilaxia habitualmente se manifiestan dentro de los minutos posteriores a la exposición a un alérgeno No obstante, en ocasiones, la anafilaxia puede manifestarse media hora después de la exposición o más tarde En casos aislados, la anafilaxia puede retrasarse varias horas Los signos y síntomas incluyen los siguientes: Reacciones cutáneas, incluidos urticaria y
  • Egg allergy - Symptoms causes - Mayo Clinic
    A severe allergic reaction can lead to a life-threatening emergency called anaphylaxis Treatment of anaphylaxis involves taking a shot of medicine called epinephrine right away and then going to the emergency room
  • Anafilaxia: primeros auxilios - Mayo Clinic
    Una anafilaxia es una reacción alérgica que pone en riesgo la vida y puede causar un estado de choque, un descenso repentino de la presión arterial y problemas para respirar En las personas alérgicas, la anafilaxia puede producirse minutos después de la exposición a un alérgeno, que es una sustancia alergénica específica En muchas ocasiones, puede haber una reacción retardada, o
  • Peanut allergy - Symptoms and causes - Mayo Clinic
    Complications of peanut allergy can include anaphylaxis Children and adults who have a severe peanut allergy are especially at risk of having this life-threatening reaction
  • Shellfish allergy - Symptoms and causes - Mayo Clinic
    Anaphylaxis requires immediate treatment with an epinephrine (adrenaline) injection and a follow-up trip to the emergency room If anaphylaxis isn't treated right away, it can be fatal
  • Milk allergy - Symptoms causes - Mayo Clinic
    Milk allergy can cause anaphylaxis, a life-threatening reaction that narrows the airways and can block breathing Milk is the third most common food — after peanuts and tree nuts — to cause anaphylaxis





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