injection

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injection,

introduction of a fluid into the body, usually by means of a needle and syringe. The material injected may be a test substance (as in determining allergic sensitivity or immunity to a disease), an anesthetic, a therapeutic drug, a nutrient (in cases where intravenous feeding is necessary), blood, or blood plasma (see blood transfusionblood transfusion,
transfer of blood from one person to another, or from one animal to another of the same species. Transfusions are performed to replace a substantial loss of blood and as supportive treatment in certain diseases and blood disorders.
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). An intracutaneous injection is the introduction of a small amount of fluid between the skin layers. A subcutaneous injection is directed to the tissues under the skin. When quicker absorption of a drug is required, an intramuscular injection may be used; even more rapid action is obtained by injection into a vein (intravenous). In certain emergencies involving the heart, such as cardiac arrest, an intracardiac injection can penetrate directly into a chamber of the musculature of the heart. Anesthetics are sometimes injected into the spine. In an injection by means of a jet injector gun, fluid penetrates through the skin by means of air pressure and there is no visible puncture mark. Micro-injections can be made into fetuses, even individual cells, with tiny capillary injectors.

injection

(insertion) The process of boosting a spacecraft into a particular orbit or trajectory. It is also the time of such action or the entry itself.

Injection

 

the introduction of small quantities of medicine in solution or emulsion into subcutaneous tissue, intramuscularly, or intravenously with syringe and needle. With injection a more rapid effect is achieved than with ingestion, as well as precise dosage and reliability of effect. With injection, medication may be introduced regardless of the condition of the patient, such as unconsciousness and inability to swallow. For localized effect medicinal solutions are injected into the pleural cavity or joints; intradermal injections are used for analgesia and for diagnostic purposes, for example, the Mantoux reaction for diagnosing tuberculosis. Intracardiac injection is resorted to when there is a sudden heart stoppage (injury from electric shock, gas poisoning, and narcosis). Injection into the cerebrospinal canal is done for analgesia and treatment of certain diseases. The rules of asepsis must be observed without fail in injection.

What does it mean when you dream about an injection?

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.

injection

[in′jek·shən]
(aerospace engineering)
The process of placing a spacecraft into a specific trajectory, such as an earth orbit or an encounter trajectory to Mars. Also known as insertion.
(electronics)
The method of applying a signal to an electronic circuit or device.
The process of introducing electrons or holes into a semiconductor so that their total number exceeds the number present at thermal equilibrium.
(geology)
Also known as intrusion; sedimentary injection.
A process by which sedimentary material is forced under abnormal pressure into a preexisting rock or deposit.
A structure formed by an injection process.
(mathematics)
A mapping ƒ from a set A into a set B which has the property that for any element b of B there is at most one element a of A for which ƒ(a) = b. Also known as injective mapping; one-to-one mapping; univalent function.
(mechanical engineering)
The introduction of fuel, fuel and air, fuel and oxidizer, water, or other substance into an engine induction system or combustion chamber.
(medicine)
Introduction of a fluid into the skin, vessels, muscle, subcutaneous tissue, or any cavity of the body.
The substance injected.
(mining engineering)
The introduction under pressure of a liquid or plastic material into cracks, cavities, or pores in a rock formation.

injection

(mathematics)
A function, f : A -> B, is injective or one-one, or is an injection, if and only if

for all a,b in A, f(a) = f(b) => a = b.

I.e. no two different inputs give the same output (contrast many-to-one). This is sometimes called an embedding. Only injective functions have left inverses f' where f'(f(x)) = x, since if f were not an injection, there would be elements of B for which the value of f' was not unique. If an injective function is also a surjection then is it a bijection.

injection

(reduction)
An injection function is one which takes objects of type T and returns objects of type C(T) where C is some type constructor. An example is

f x = (x, 0).

The opposite of an injection function is a projection function which extracts a component of a constructed object, e.g.

fst (x,y) = x.

We say that f injects its argument into the data type and fst projects it out.
References in periodicals archive ?
Intracytoplasmic sperm injection pregnancy with fetal trisomy 9p resulting from a balanced paternal translocation.
However, beginning in the mid 1990s, intracytoplasmic sperm injection using sperm harvested through testicular microdissection has become a viable treatment option for many of these individuals.
But sperm banking needn't delay treatment, even in men with low sperm counts, since fertilization via intracytoplasmic sperm injection requires very limited numbers of sperm.
It was not until that 1992 the first baby was born from intracytoplasmic sperm injection (ICSI), a breakthrough fertility technology in which scientists inject a carefully selected healthy sperm cell into a human egg in the lab.
The medical staff of the center specializes in providing state-of-the-art fertility services including in vitro fertilization, intracytoplasmic sperm injection, assisted hatching, pre-implantation genetic diagnosis and a full array of reproductive surgery.
The laboratory staff at GRS, specializing in in vitro fertilization, intracytoplasmic sperm injection and other assisted reproductive technologies, plays a pivotal role in each in vitro fertilization cycle at GRS and also are called upon to lend their expertise to developing IVF centers across the country.
To date, five of eight women have become pregnant after having their eggs removed and frozen for 1 month, then thawed and fertilized by intracytoplasmic sperm injection, followed by subsequent embryo transfer.
The first and only in-office in vitro fertilization (IVF) program -- The first gamete intrafallopian transfer (GIFT) pregnancy -- The first pregnancy using donor eggs and IVF in the region -- The first practice to offer embryo cryopreservation -- The first baby born from intracytoplasmic sperm injection (ICSI) -- The first local facility to offer outpatient tubal reversals by reproductive endocrinologists
Conversely, only 37 percent were aware of intracytoplasmic sperm injection, which involves the direct injection of sperm into eggs obtained through IVF.
Of those with CHARGE association, one boy and one girl were the product of intracytoplasmic sperm injection, and another boy was conceived after his mother's use of ovulation stimulating hormone.
This new facility will offer a full spectrum of ART services, including in vitro fertilization, intracytoplasmic sperm injection, gamete intrafallopian transfer (GIFT) and cryopreservation of embryos.