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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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英文字典中文字典相关资料:


  • 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
  • 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
  • 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
  • Latex allergy - Symptoms and causes - Mayo Clinic
    Anaphylaxis is a possibly life-threatening condition that can cause throat swelling and serious difficulty breathing A healthcare professional can find out if you have a latex allergy or if you're at risk of developing a latex allergy
  • 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
  • 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
  • Bee sting - Symptoms and causes - Mayo Clinic
    People who have a severe reaction to a bee sting have on average a 50% chance of anaphylaxis the next time they're stung Talk to a healthcare professional about prevention measures such as allergy shots to avoid a similar reaction if you get stung again





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