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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: Causes, Symptoms, Diagnosis Treatment
    Anaphylaxis is a severe and life-threatening allergic reaction It causes difficulty breathing Treatment involves using an epinephrine injector
  • Anaphylaxis - Symptoms causes - Mayo Clinic
    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
  • Anaphylaxis - Wikipedia
    Anaphylaxis Anaphylaxis is a serious, potentially fatal allergic reaction that can progress rapidly [4]
  • Anaphylaxis (Anaphylactic Reaction): Symptoms, Causes, Treatment - WebMD
    Anaphylaxis (or "anaphylactic shock") is a life-threatening allergic reaction that needs to be treated right away If you have an anaphylactic reaction, you need a dose of epinephrine
  • Anaphylaxis definition, overview, and clinical support tool: 2024 . . .
    In 2020, the World Allergy Organization published modified criteria that have not been uniformly adopted Different criteria contribute to inconsistent care and research outcomes We sought to develop a consensus anaphylaxis definition, overview, and clinical support tool
  • Anaphylaxis Symptoms, Diagnosis, Treatment Management | AAAAI
    An overview of anaphylaxis symptoms, diagnosis, treatment and management written and reviewed by the leading experts in allergy, asthma and immunology
  • Anaphylaxis - NHS
    NHS information about anaphylaxis, including symptoms, when to get help, treatment and prevention
  • Anaphylaxis - Johns Hopkins Medicine
    Anaphylaxis, also called allergic or anaphylactic shock, is a sudden, severe and life-threatening allergic reaction that involves the whole body The reaction is marked by constriction of the airways, leading to difficulty breathing Swelling of the throat may block the airway in severe cases
  • Anaphylaxis - Harvard Health
    Anaphylaxis is a severe, sometimes life-threatening, allergic reaction that occurs within minutes to several hours of exposure an allergy-causing substance (allergen) Anaphylaxis also is called anaphylactic shock
  • Anaphylaxis - EMCrit Project
    Exposure to a known causative agent increases the index of suspicion Some patients can have idiopathic anaphylaxis, so the absence of a trigger doesn't exclude anaphylaxis Having two organ systems involved strongly supports the diagnosis





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