BSN Notes: Common Signs And Symptoms: Shock- Anaphylactic Shock

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Anaphylactic Shock
a shock caused by a severe allergic (immunologic) reacton where a patient who has already  produced antibodies to a foreign substance (antigen) develops a systemic antigen – antibody reaction and triggers abnormal  dilatation of blood vessels .
Causes
·         Penicillin sensitivity
·         Food items
·          Snake venom
·         Substances used in diagnosis or treatments
·         Blood and blood products (Transfusion reaction)
·         Bee sting allergy
·         Other substances eg. Pollen , molds etc.
Pathophysiology
Antigen antibody reaction provoke cells to release patent vasoactive substances such as histamine or bradykinin etc.
Widespread vasodialation
Fluid shift
↓BP

Clinical features:
Uneasiness
Feelings of impending doom
Headache
Feeling of lump in throat
hoarseness of voice ,
dyspnoea
waheezing
pruritis
urticarial
edema of eyelids
anxiety etc.
Management:
Remove causative agent
Adrenaline is given to stimulate cardiac performance and corticosteroids to reduce inflammatory response.
Cardiac and resparatory support

Tracheostomy if needed 

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notes.nursium.com: BSN Notes: Common Signs And Symptoms: Shock- Anaphylactic Shock
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