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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.


(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.



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.


(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.


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.
References in periodicals archive ?
Data extracted from full texts of the included studies covered the number and characteristics of patients, the characteristics of intrathecal and epidural injections, patient position during the intrathecal block, the time lag before the performance of EVE following the intrathecal injection, the maximum sensory and motor blockade, the EVE-induced rise in sensory block, and the occurrence of hypo-tension (Tables 1 and 2) (1,2,4-15).
Many operators will use 20 mg Depo-Medrol per facet joint injection as Depo-Medrol is FDA-approved for joint injections and there is little risk of intrathecal injection.
The procedure involves introducing a needle varying from 16 to 30 gauge with various tips blunted and curved to avoid dural puncture during epidural injection and to avoid cerebrospinal fluid (CSF) leak and subsequent spinal headaches after intrathecal injection.
If an intrathecal injection is required this significantly extends the length of stay for patients as recovery time is extended based on injection method.
However, the outcomes of these studies have been compromised by the wide range of block heights that result from an intrathecal injection and the confinement to a single, usually large, one-shot dose to guarantee satisfactory anaesthesia.
The women who participated were randomly assigned to receive either an intrathecal injection of fentanyl or systemic hydromorphone when they first requested analgesia.
Interventional treatments: use of interventional treatments such as epidural injections, facet joint injections, facet joint denervation, large joint injections, medical acupuncture, nerve root blocks, peripheral nerve blocks, prolotherapy, sympathetic blocks, lumbar sympathectomy, spinal manipulation, trigger point injections, tendon sheath/bursa injections, intrathecal injection, spinal chord stimulation, intramuscular stimulation, TENS and others
Thirty of those patients received three stem cell transplants via intrathecal injection and intravenous infusion with one week intervals with a total of 16 days of treatment.
Complaints of sustained or severe paraesthesia or dysaesthesia during spinal needle insertion or intrathecal injection were regarded as indications to remove and re-site the epidural and spinal needles at an alternative lumbar interspace, but transient complaints were not.
Josephine Lai, Professor of Pharmacology at the University of Arizona, presented results showing that intrathecal injection of an siRNA targeting neuropeptide Y (NPY) prevented the development of neuropathic pain in a rat model.
A practical limitation of sequential intrathecal injection of solutions is possible spillage of the drug or movement of the spinal needle while changing syringes.
Results showed that intrathecal injection of an siRNA targeting NaV1.