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Related to intrathecal injection: epidural injection, hypoalgesia


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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.


(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.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

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.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.


(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.
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.
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.
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.
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


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.


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.
This article is provided by FOLDOC - Free Online Dictionary of Computing (
References in periodicals archive ?
Regarding the CNS-HLH prognosis, current views generally consider that intrathecal injection does not have a significantly active function on the final outcome of CNS-HLH and that more often allo-HSCT is required.[4],[20] Even though in our study, the P value is not significant, which may be related to the limited number of cases, it is also very clear in the survival curve that allo-HSCT significantly improved the prognosis of CNS-HLH patients and effectively prolonged their survival times.
Serum and CSF were collected at baseline and each time of intrathecal injection. Anti-NMDAR antibodies were evaluated using the indirect immunofluorescence test kit autoimmune encephalitis mosaic 1 (catalog no.
Morphine, which is a hydrophilic opioid, has a longer residence time in the cerebrospinal fluid and therefore has long-lasting analgesia with intrathecal injection. [4,8] In our study, we compared efficacy and adverse effects of intrathecal ketorolac, intrathecal morphine, combination of both and normal saline with bupivacaine in lower limb inflammatory orthopaedic and general surgeries.
The patients were kept warm by insulating both lower limbs, upper limbs, chest and head-neck region with clean PVC sheets immediately after completion of intrathecal injection and urinary catheterisation.
* Numerical rating scale pain scores at rest and movement (pressure care turning) were collected at four, eight, 12, 16 and 20 hours post intrathecal injection and averaged to give a first 24-hour pain 'score' with a denominator of 10.
(27.) Balestrieri PJ, Hamza MS, Ting PH, Blank RS, Grubb CT Inadvertent intrathecal injection of labetalol in a patient undergoing post-partum tubal ligation.
Its use however is limited by its short duration of action and its implication in transient neurologic symptoms and cauda equina syndrome following intrathecal injection. Bupivacaine is three to four times more potent than lidocaine and has longer duration of action.
Our findings highlight the potential inaccuracy of anaesthetists preparing their own solutions of morphine for intrathecal injection. The current commercial availability of a specific intrathecal preparation of morphine adds weight to its preferential use in all clinical settings in view of the likely benefits of patient safety and efficacy.
Heart rate and NIBP were recorded before intrathecal injection, 3, 5, 15, 30 minutes after the intrathecal drug administration, and thereafter every 30 minutes till the end of the surgery and one hour after the end of the surgery, at the ward.
Data collection included years of training and specialist status, previous experience with intrathecal injection of morphine, usual method of dilution of intrathecal morphine and typical intrathecal morphine dose administered.
* The duration of effective analgesia was considered as time from intrathecal injection to administration of rescue analgesia.
In this case we believe erroneous judgment and inappropriate management led to intrathecal injection of autologous blood.