chapter 21: anaphylactic reactions

Created by jritter1970 

Upgrade to
remove ads

18 terms · key terms

allergen

a substance that enters the body by ingestion, injection, inhalation, or absorption and triggers an allergic reaction

allergic reaction

a misdirected and excessive response by the immune systemto a foreign substance or allergen.

anaphylactic reaction

a reactive release of chemical mediators that produce bronchoconstriction, vasodialation, capillary permeability, and increased mucus production leading to airway and respiratory compromise and hypoperfusion, also called anaphylaxis

anaphylactic shock

a shock (hypoperfusion) state that results from dialated and leaking blood vessels related to severe allergic reaction.

anaphylactoid reaction

a reaction to a foreign substance that resemblesan anaphylactic reaction that may occur on first exposure to the substance, without immune system sensitization

anaphylaxis

another term for anaphylactic reaction

antibodies

special proteins produced by the immune system that search out antigens and combine with and help to destroy them

antigen

a foreign substance that enters the body and triggers an immune response. see also allergen.

auto-injector

a device with a concealed, spring loaded needle, used for injecting a single dose of medication. An epinephrine auto injector is often prescribed to patients with a history of anaphylactic reaction

endotracheal intubation

placement of a tube down the trachea to facilitate airflow into the trachea and lungs.

epinephrine

a natural hormone that, when used as a medication, constricts blood vessels to improve blood pressure, reduces leakage from blood vessel, relaxes smooth muscle in the bronchioles (causes bronchodilation), and increases the heart rate and force ventricular contractions.

histamine

the primary chemical mediator released from the mast cells in an anaphylactic reaction.

hives

raised, red blotches associated with allergic and anaphylactic reactions.

hypersensitivity

a state of altered reactivity to an antigen, or foreign substance, that causes allergic reactions to that substance. see also sensitization.

immune response

production of antibodies by the immune system to fight off invasion by foreign substances.

immune system

the body's defense mechanism against invasion by foreign substances.

malaise

a general feeling of weakness or discomfort.

sensitization

exposure to an allergenthat results in hypersensitivityh to that allergen. see also hypersensitivity.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set