/dee sen'si teuh zay"sheuhn/, n.1. the act or process of desensitizing.2. Physiol., Med. the elimination or reduction of natural or acquired reactivity or sensitivity to an external stimulus, as an allergen.3. Psychiatry. a behavior modification technique, used esp. in treating phobias, in which panic or other undesirable emotional response to a given stimulus is reduced or extinguished, esp. by repeated exposure to that stimulus.[1920-25; DESENSITIZE + -ATION]
* * *Treatment to eliminate allergic reactions (see allergy) by injecting increasing strengths of purified extracts of the substance that causes the reaction.This creates special antibodies (blocking antibodies) in the patient's serum that combine with the allergen, blocking its reaction with allergic antibodies. Desensitization can also be required when a penicillin-sensitive person needs to be treated with penicillin. See also anaphylaxis, antigen.
* * *▪ medicinealso called Hyposensitization,treatment that attempts to eliminate allergic reactions, as of hay fever or bronchial asthma, by a series of injections in graded strengths of the substance to which the person is sensitive (e.g., pollen, house dust). Extracts of the material to be injected are purified and put into an alkaline buffer solution, to which epinephrine (epinephrine and norepinephrine) (adrenaline) is often added to minimize local inflammatory reactions. The first injections contain little antigen, but, as desensitization progresses, more and more is added. A three-month program of injections often suffices for hay-fever (hay fever) sufferers, but asthmatics (asthma) may require a longer program.Desensitization is successful in about 80 percent of hay-fever sufferers and up to 90 percent of asthmatics; treatment is more effective in persons with a few, well-defined allergies than in those allergic to many substances. The success of desensitization is attributed to special antibodies, called blocking antibodies, that appear in the serum after treatment and combine preferentially with allergen. This prevents the reaction of allergen with allergic antibodies in the skin and precludes an allergic reaction. Desensitization can also be required when a penicillin-sensitive person contracts a disease such as bacterial endocarditis, which is best treated with penicillin. See also allergy; anaphylaxis; antibody; antigen.
* * *
Look at other dictionaries:
Desensitization — can refer to: Desensitization (telecommunications) Desensitization (medicine) Desensitization (psychology) Desensitization of explosives, see Phlegmatized This disambiguation page lists articles associated with the same title. If an … Wikipedia
desensitization — n. the process of reducing or eliminating sensitivity. Syn: desensitisation. [WordNet 1.5] … The Collaborative International Dictionary of English
desensitization — 1. The reduction or abolition of allergic sensitivity or reactions to the specific antigen (allergen). SYN: antianaphylaxis. 2. The act of removing an emotional complex. SYN: hyposensitization. hete … Medical dictionary
desensitization — desensibilizavimas statusas T sritis Standartizacija ir metrologija apibrėžtis Medžiagos jautrio šviesai mažinimas. atitikmenys: angl. desensitization vok. Desensibilisierung, f rus. десенсибилизация, f pranc. désensibilisation, f … Penkiakalbis aiškinamasis metrologijos terminų žodynas
desensitization — desensibilizavimas statusas T sritis chemija apibrėžtis Medžiagos jautrio mažinimas. atitikmenys: angl. desensitization rus. десенсибилизация … Chemijos terminų aiškinamasis žodynas
desensitization — desensibilizavimas statusas T sritis fizika atitikmenys: angl. desensitization vok. Desensibilisation, f; Desensibilisierung, f rus. десенсибилизация, f pranc. désensibilisation, f … Fizikos terminų žodynas
desensitization — desensitize (also desensitise) ► VERB 1) make less sensitive. 2) make indifferent to cruelty or suffering. DERIVATIVES desensitization noun … English terms dictionary
desensitization — noun see desensitize … New Collegiate Dictionary
desensitization — (de sen si ti za shun) To make a sensitized or hypersensitive individual insensitive or nonreactive to a sensitizing agent … Dictionary of microbiology
desensitization — In a general sense: see adaptation. Immunologically, the term is used to mean the administration of a graded series of doses of an antigen to which there is an immediate hypersensitivity response. The technique is used in the treatment of allergy … Dictionary of molecular biology