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 ?
Spinal injection was conducted by using 27 G spinal needle with pointed tip with the bevel parallel to the durafiber.
Although several mechanisms can contribute to allodynia after spinal injection of LPS, it has been observed that this treatment enhances CASP1 and ASC secretion providing evidence of the involvement of the inflammasome complex [36].
The patient underwent fluoroscopy-guided spinal injection of 10 mL of iohexol 300 mgI/mL contrast medium from a single-dose vial prepared by a nurse in accordance with Centers for Disease Control and Prevention guidelines (10).
Al-Malyan et al elicited the in fluence of patient posture during the anaesthetic injection on its unilateral success.21 Unilateral anaesthesia was seen in 80% of the patients in whom spinal injection was given in lateral position as compared to 12% patients given injection in the sitting position and then immediately turned to their lateral side.
There's one shape for intravenous injections and then another, different shape for nasogastric tubes, for spinal injection and so on."
It is incumbent upon hospitals and health care providers who perform spinal injection procedures to minimize the occurrence of bacterial meningitis after these procedures by being familiar with and adhering to the recommendations issued by the CDC in June 2007, the authors wrote.
Dave Thompson Potton, Beds IF NHS waiting times to see a specialist are now six to eight weeks, why am I in my 14th week of waiting for a simple spinal injection?
Animals that developed autophagia and excessive grooming over the hindlimb midthigh ipsilateral to the spinal injection were included in a weekly measure of lesion size after QUIS injection and transplant of hNT2.17 cells, as described previously [35].
These procedures include arthroscopy, biopsy of the liver, biopsy of the prostate, cataract removal, central venous catheterization, colonoscopy, debridement of skin and other tissues, upper gastrointestinal endoscopy, laparoscopic cholecystectomy, laparoscopic occlusion and fulguration of oviducts, spinal injection for myelography and/or computed tomography, and repair of inguinal hernia.
Reservations about the study include its very small size, the lack of controls (comparable patients treated with placebo) to help evaluate differences among patients, lack of clarity regarding the manner and extent the drug affects the brain, and the added risk involved in using spinal injection as a method of delivering the drug.
What is the name of the spinal injection used to relieve pain during childbirth?
This researcher's hypothesis is that release of GABA by neuronal cells grafted into the subarachnoid space near the spinal cord will reduce behavioral symptoms of chronic neuropathic pain after excitotoxic SCI induced in the rat model by spinal injection of quisqualic acid (QUIS).