injection

1. The act of injecting.
2. Something that is injected, especially a dose of liquid medicine injected into the body.
3. Mathematics. A function that is one-to-one.

[Sense 3, IN-² + (PRO)JECTION.]

The act of introducing a liquid into the body by means of a needle and syringe. Injections are designated according to the anatomic site involved. The most common injections are intraarterial, intradermal, intramuscular, intravenous, and subcutaneous.

Injection into skin. (Chester, 1998)

The introduction of fluid, usually containing medicines, into the body by means of a syringe. It is essential that injections are made at the correct site and that they are administered under aseptic conditions. Failing to do the first can damage tissue; failure to do the second can introduce infectious diseases, such as hepatitis.

1. the forcing of a liquid into a part, as into the subcutaneous tissues, the vascular tree, or an organ.
2. a substance so forced or administered; in pharmacy, a solution of a medicament suitable for injection.
3. congestion.
4. immunizing substances, or inoculations, are generally given by injection. When a patient is unconscious, injection may be the only means of administering medication, and in some cases nourishment. Some medicines cannot be given by mouth because chemical action of the digestive juices or of hepatic enzymes would change or reduce their effectiveness, or because they would be removed from the body too quickly to have any effect. Certain potent medicines must be injected because they would irritate body tissues if administered any other way. A medication may be injected so that it will act more quickly.
In addition to the most common types of injections described below, injections are sometimes made under the conjunctiva, into arteries, bone marrow, the spine, the sternum, the pleural space of the chest region, the peritoneal cavity and joint spaces.

• i. collar — a collar carrying an injection device which can be triggered from a remote site.
• epidural i. — see epidural.
• hypodermic i. — subcutaneous injection.
• intradermal i., intracutaneous i. — injection of small amounts of material into the corium or substance of the skin. This method is used in diagnostic procedures and in administration of regional anesthetics, as well as in treatment procedures. In certain allergy tests, the allergen is injected intracutaneously. These injections are given in an area where the skin and hair are sparse, usually on the inner part of the thigh in dogs or the caudal fold in cows. A small-gauge needle is recommended and it is inserted at a 10- to 15-degree angle to the skin.
• intramuscular i. — injection into the substance of a muscle, usually the thigh or pectoral muscle, or the muscle of the neck or rump. Intramuscular injections are given when the substance is to be absorbed quickly. They should be given with extreme care, especially in the thigh, because the sciatic nerve may be injured or a large blood vessel may be entered if the injection is made without drawing back on the syringe first.
• intraperitoneal i. — liquid injection, usually of antibacterial agent, rarely anesthetic or euthanatizing agents, administered to obtain systemic blood levels of the agent; faster than subcutaneous or intramuscular injection and used when veins not accessible. The needle is introduced into the upper flank and the syringe plunger withdrawn to ensure that intestine has not been penetrated. The injected solution should run freely.
• intratesticular i. — a method of administering a general anesthetic agent to boars for castration.
• intravenous i. — an injection made into a vein. Intravenous injections are used when rapid absorption is called for, when fluid cannot be taken by mouth, or when the substance to be administered is too irritating to be injected into the skin or muscles. In certain diagnostic tests and x-ray examinations, a drug or dye may be administered intravenously. Blood transfusions also are given by this route. See also intravenous infusion.
• subarachnoid i. — the risk of injection is greatest at the atlanto-occipital space where the vertebral venous plexus is most likely to be lacerated.
• subcutaneous i. — injection made into the subcutaneous tissues; called also hypodermic injection. Although usually fluid medications are injected, occasionally solid materials, such as steroid hormones, are administered subcutaneously in small, slowly absorbed pellets to prolong their effect. Subcutaneous injections may be given wherever there is subcutaneous tissue, usually in the loose skin on the side of the chest or in the flank. The amount injected should not exceed 2 ml for cats and small dogs, 5 ml for large dogs and 20 ml for horses. Cows are often given 200 ml because of their very loose skin. The needle is held at a 45-degree angle to the skin.

In traditional psychoanalysis, a dream about an injection is often viewed as a dream about sexual intercourse. Can also indicate an influence that is forced on us. If we had bad experiences with being inoculated as children, then an injection dream can represent any number of different anxieties and fears.

Look up injection in Wiktionary, the free dictionary.

Injection may refer to:

• Injection (medicine), a method of putting liquid into the body with a syringe and a hollow needle that punctures the skin.
• Injective function in mathematics, a function which associates distinct arguments to distinct values
• Injection molding, a manufacturing technique for making parts from thermoplastic and thermosetting material
• Injection (economics), a financial boost entered into the economic cycle, includes government spending, investment and exports
• Injected (band), an American rock band from Atlanta, Georgia formed in 1995
• Dependency injection, a programming design pattern and architectural model, sometimes also referred to as inversion of control
• Fuel injection, a means of metering fuel into an internal combustion engine
• in broadcasting, the level at which a subcarrier is sent by the transmitter, expressed as a percent of total modulation

• In computing:
  • SQL injection, a security vulnerability that occurs in the database layer of an application
  • Code injection, a technique in computer science for exploiting vulnerabilities in computer programs due to erroneous assumption by designers.
  • E-mail injection, a security vulnerability that exploits web forms that generate email

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

Dansk (Danish)
n. - indsprøjtning, indblæsning, injektion, tilførsel

idioms:

• injection moulding    sprøjtestøbning

Nederlands (Dutch)
injectie, inspuiting, prik, stimulans

Français (French)
n. - (Méd) piqûre, injection, (Tech) injection

idioms:

• injection moulding    (US) moulage par injection

Deutsch (German)
n. - Injektion, Einspritzung

idioms:

• injection moulding    Spritzguß

Ελληνική (Greek)
n. - έγχυση, ένεση

idioms:

• injection moulding    (μηχαν.) μορφοποίηση με έγχυση

Italiano (Italian)
iniezione

idioms:

• injection moulding    stampaggio a iniezione

Português (Portuguese)
n. - injeção (f)

idioms:

• injection moulding    moldagem (f) por injeção

Русский (Russian)
впрыскивание

idioms:

• injection moulding    литьевое формование

Español (Spanish)
n. - inyección

idioms:

• injection moulding    moldeo por inyección

Svenska (Swedish)
n. - injektion (äv. bildl.), spruta, insprutning (äv. mek.), injektering (byggn.)

中文（简体）(Chinese (Simplified))
注射, 注射剂

idioms:

• injection moulding    注射模型, 注塑, 注射铸造法

中文（繁體）(Chinese (Traditional))
n. - 注射, 注射劑

idioms:

• injection moulding    注射模型, 注塑, 注射鑄造法

한국어 (Korean)
n. - 주입, 주사, 분사

日本語 (Japanese)
n. - 注入, 注射, 投入, 噴射, 充血, 注射液

idioms:

• injection moulding    注入式鋳造

العربيه (Arabic)
‏(الاسم) إدخال, حقن, زرق, حقنه‏

עברית (Hebrew)
n. - ‮זריקה, הזרקה, תזריק (החומר המוזרק)‬

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