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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 is a severe, potentially life-threatening allergic reaction It can occur within seconds or minutes of exposure to something you're allergic to, such as peanuts or bee stings Anaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock — blood pressure drops suddenly and the airways narrow, blocking breathing Signs and symptoms
  • 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 Sometimes, there may be a delayed
  • 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
  • Anafilaxia: primeros auxilios - Mayo Clinic
    Una reacción alérgica mortal llamada anafilaxia puede causar un estado de choque, un descenso repentino de la presión arterial y dificultades para respirar En las personas alérgicas, la anafilaxia puede manifestarse minutos después de la exposición a una sustancia específica que causa la
  • Allergies - Symptoms and causes - Mayo Clinic
    Flake, peel or crack Anaphylaxis 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 Anaphylaxis can cause you to go into shock Other symptoms include: Passing out A drop in blood pressure
  • 严重过敏反应 - Symptoms causes - Mayo Clinic
    严重过敏反应症状通常在接触过敏原几分钟内发生。然而,严重过敏反应有时会在接触过敏原半小时或更长时间后发生。极少数情况下,严重过敏反应可能会延迟数小时才出现。体征和症状包括: 皮肤反应,包括荨麻疹、瘙痒、皮肤潮红或苍白 低血压(血压过低) 气道收缩、舌头或咽喉肿胀,这会
  • 全身性过敏反应:急救 - 妙佑医疗国际
    全身性过敏反应的急救方法。 拨打 911 或当地急救电话后,请采取以下措施: 询问患者有没有携带治疗过敏发作的肾上腺素自动注射器(EpiPen、Auvi-Q 等)。 如果患者需要使用自动注射器,询问是否需要您帮忙注射药物。通常是将自动注射器按在患者的大腿上完成注射。 让患者面部朝上躺着并保持
  • التأق-التأق - الأعراض والأسباب - مايو كلينك
    كتاب: Mayo Clinic First-Aid Guide for the Outdoor Adventurer (دليل الإسعافات الأولية من مايو كلينك للمغامرين في الأماكن المفتوحة)
  • Egg allergy - Symptoms causes - Mayo Clinic
    Anaphylaxis 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 Anaphylaxis symptoms include: Tightening of airways, including a swollen throat or a lump in the throat that makes it hard to breathe Pain and cramping in the stomach





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