what happens to blood pressure in anaphylactic shock
Anaphylaxis There are three main classifications of anaphylaxis. Anaphylactic shock is associated with systemic vasodilation that causes low blood pressure which is by definition 30% lower than the person's baseline or below standard values.[14] Biphasic anaphylaxis is the recurrence of symptoms within 1â€“72 hours with no further exposure to the allergen.[3] Reports of incidence vary, with some studies claiming as many as 20% of cases.[33] The recurrence typically occurs within 8 hours.[8] It is managed in the same manner as anaphylaxis.[7] Pseudoanaphylaxis or anaphylactoid reactions are a type of anaphylaxis that does not involve an allergic reaction but is due to direct mast cell degranulation.[8][34] Non-immune anaphylaxis is the current term used by the World Allergy Organization[34] with some recommending that the old terminology no longer be used.[8]