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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

electrocoagulation
Electrosurgical procedures used to treat haemorrhage (e.g., bleeding ulcers) and to ablate tumours, mucosal lesions, and refractory arrhythmias. ... (12 Dec 1998) ...

electrocochleogram
The record obtained by electrocochleography. ... (05 Mar 2000) ...

electrocochleography
A measurement of the electrical potentials generated in the inner ear as a result of sound stimulation. ... Origin: electro-+ L. Cochlea, snail shell, + G. Grapho, to write ... (05 Mar 2000) ...

electroconductivity
<chemistry> A measure of the total dissolved ions in a substance, which indicates the material's ability to conduct electricity. ... <ecology> Soil electroconductivity's are determined from distilled water extracts of saturated soil pastes. ... (09 Oct 1997) ...

electrocontractility
The power of contraction of muscular tissue in response to an electrical stimulus. ... (05 Mar 2000) ...

electroconvulsive
Denoting a convulsive response to an electrical stimulus. ... See: electroshock therapy. ... (05 Mar 2000) ...

electroconvulsive therapy
Electrically induced convulsions primarily used in the treatment of severe affective disorders and schizophrenia. ... (12 Dec 1998) ...

electrocorticogram
A record of electrical activity derived directly from the cerebral cortex. ... (05 Mar 2000) ...

electrocorticography
The technique of recording the electrical activity of the cerebral cortex by means of electrodes placed directly on it. ... (05 Mar 2000) ...

electrocution
Death caused by electricity. ... See: electrocute. ... Synonym: electrothanasia. ... (05 Mar 2000) ...

electrocystography
Recording of electric currents or changes in electric potential from the urinary bladder. ... (05 Mar 2000) ...

electrode
<chemistry> Any terminal that conducts an electric current into or away from various conducting substances in a circuit (such as the anode or cathode of a battery). ... (09 Jan 1998) ...

electrode catheter ablation
A method of ablating the site of origin of arrhythmias whereby high energy electric shocks are delivered by intravascular catheters. ... (05 Mar 2000) ...

electrode knife
A blade-shaped electrical instrument used to cut tissues by means of a high-frequency electrical current. ... (05 Mar 2000) ...

electrodermal
Pertaining to electric properties of the skin, usually referring to altered resistance. ... Origin: electro-+ G. Derma, skin ... (05 Mar 2000) ...

electrodermal audiometry
A form of electrophysiologic audiometry used to determine hearing thresholds by measuring changes in skin resistance as a conditioned response to noise stimuli. ... (05 Mar 2000) ...

electrodermatome
Any dermatome powered by electricity. ... (05 Mar 2000) ...

electrodes
Mediums used between an electric conductor and the object to which the current is to be applied. In electrotherapy, electrodes are instruments with a point or surface from which to transmit electric current to the body of a patient or to another instrument; in electrodiagnosis, they are needles or metal plates used to stimulate or record the electr …

electrodes, implanted
Electric conductors through which an electric current enters or leaves a medium. When inserted, usually surgically, they are referred to as implanted electrodes. ... (12 Dec 1998) ...

electrodesiccation
Use of an electric current to destroy cancerous tissue and control bleeding. ... (12 Dec 1998) ...

electrodiagnosis
Diagnosis of disease states by recording the spontaneous electrical activity of tissues or organs or by the response to stimulation of electrically excitable tissue. ... (12 Dec 1998) ...

electrodialysis
The use of an electric field to speed up the dialysis process. The electric field is applied across the dialysis membrane. ... Origin: Gr. Lysis = dissolution ... (09 Oct 1997) ...

electrodiffusion
The use of an electric field to induce substances with positive or negative charges to move in a particular direction. ... (09 Oct 1997) ...

electrodynamic force
London Van der Waals forces: ... See: DLVO theory. ... (18 Nov 1997) ...

electrodynamics
1. The phenomena of electricity in motion. ... 2. <study> The branch of science which treats of the properties of electric currents; dynamical electricity. ... (03 Mar 1998) ...

electrodynamometer
<instrument> An instrument for measuring the strength of electrodynamic currents. ... (03 Mar 1998) ...

electroejaculation
<physiology> Controlled electrical stimulation, usually applied to the prostate gland with a probe, to induce ejaculation in a man who has nerve damage that prevents him from ejaculating normally.This technique is also used in veterinary medicine, especially by zoo vets who are trying to increase the populations of endangered mammal species b …

electroencephalogram
<investigation> A diagnostic test which measures the electrical activity of the brain (brain waves) using high sensitive recording equipment attached to the scalp by fine electrodes. ... Commonly employed in the evaluation of neurological disease (for example seizures, epilepsy, etc.). ... Acronym: EEG ... (13 Nov 1997) ...

electroencephalograph
A system for recording the electric potentials of the brain derived from electrodes attached to the scalp. ... Origin: electro-+ G. Encephalon, brain, + grapho, to write ... (05 Mar 2000) ...

electroencephalographic dysrhythmia
A diffusely irregular brain wave tracing. ... (05 Mar 2000) ...

electroencephalography
<investigation> The recording of the electric currents developed in the brain, by means of electrodes applied to the scalp, to the surface of the brain (intracranial e.) or placed within the substance of the brain (depth e.). ... (18 Nov 1997) ...

electroendosmosis
1. <physics> The effect of an electric field on the diffusion of water through or into a membrane or gel. ... 2. <chemistry> The movement of the liquid medium of a colloid solution towards an electrode. ... (05 Jan 1998) ...

electrofocusing
<technique> Any technique whereby chemical species are concentrated using an applied electric field. ... See: isoelectric focussing. ... (05 Jan 1998) ...

electrogastrogram
The record obtained with the electrogastrograph. ... (05 Mar 2000) ...

electrogastrograph
An instrument used in electrogastrography. ... Origin: electro-+ G. Gaster, stomach, + grapho, to write ... (05 Mar 2000) ...

electrogastrography
The recording of the electrical phenomena associated with gastric secretion and motility. ... (05 Mar 2000) ...

electrogenic
<physiology> Refers to a substance that contributes to an electrical potential across a membrane. ... Origin: Gr. Gennan = to produce ... (09 Oct 1997) ...

electrogenic pump
<physiology> Ion pump that generates net charge flow as a result of its activity. The sodium potassium exchange pump transports two potassium ions inward across the cell membrane for each three sodiums transported outward. ... This produces a net outward current that contributes to the internal negativity of the cell. ... (05 Jan 1998) ...

electrogram
1. Any record on paper or film made by an electrical event. ... 2. In electrophysiology, a recording taken directly from the surface by unipolar or bipolar leads. ... (05 Mar 2000) ...

electrograph
<investigation> A mark, record, or tracing, made by the action of electricity. ... (03 Mar 1998) ...

electrographic seizure
Synonym for subclinical seizure ... A seizure detected by EEG, which has no clinical correlate, i.e., an EEG seizure alone or an electrical seizure alone. ... Synonym: electrographic seizure. ... (05 Mar 2000) ...

electrohemostasis
Arrest of haemorrhage by means of an electrocautery. ... Origin: electro-+ G. Haima, blood, + stasis, halt ... (05 Mar 2000) ...

electrohysterograph
Instrument that records uterine electrical activity. ... Origin: electro-+ G. Hystera, womb, + grapho, to write ... (05 Mar 2000) ...

electroimmunodiffusion
An immunochemical method that combines electrophoretic separation with immunodiffusion by incorporating antibody into the support medium. ... (05 Mar 2000) ...

electrokymogram
An obsolete technique for making a graphic record of the heart's movements produced by the electrokymograph. ... (05 Mar 2000) ...

electrokymograph
An obsolete apparatus for recording, from changes in the X-ray silhouette, the movements of the heart and great vessels; consists of a fluoroscope, X-ray tube, and a photomultiplier tube together with an electrocardiograph. ... (05 Mar 2000) ...

electrokymography
Radiographic technique combining a photoelectric recording system with fluoroscopy. It is used especially with electrocardiography to study heart motion. ... (12 Dec 1998) ...

electrolarynx
A battery-operated instrument that makes a humming sound to help laryngectomees talk. ... (12 Dec 1998) ...

electrology
<study> That branch of physical science which treats of the phenomena of electricity and its properties. ... (03 Mar 1998) ...

electrolysis
1. <chemistry> The process where an electric current is passed through an electrolytic solution or other appropriate medium, causing a chemical reaction. Similar to what happens within a battery. ... 2. <procedure> The process where an electric current is used to destroy tumours. ... 3. <dermatology> The removal of unwanted body hai …

electrolyte
<chemistry> A substance that dissociates into ions when fused or in solution and thus becomes capable of conducting electricity, an ionic solute. ... Origin: Gr. Lytos = that may be dissolved ... (18 Nov 1997) ...

electrolyte imbalance
<biochemistry> An inappropriate level of a blood electrolyte. Typically this relates to abnormal level of sodium, potassium or chloride in the bloodstream. ... (27 Sep 1997) ...

electrolyte metabolism
The chemical changes that various essential minerals (e.g., sodium, potassium, calcium, magnesium) undergo in the tissues. ... (05 Mar 2000) ...

electrolyte profile
<biochemistry> A test which includes the measurement of the sodium, potassium, C02 and chloride concentrations in venous blood. ... (27 Sep 1997) ...

electrolyte solution
<chemistry> A solution containing charged atoms or molecules. ... (09 Oct 1997) ...

electrolytes
Substances that dissociate into two or more ions, to some extent, in water. Solutions of electrolytes thus conduct an electric current and can be decomposed by it (electrolysis). ... (12 Dec 1998) ...

electrolytic cell
<chemistry> A cell that uses electrical energy to produce a chemical change that would otherwise not occur spontaneously. ... (09 Jan 1998) ...

electrolyzable
<chemistry> Capable of being electrolyzed, or decomposed by electricity. ... (03 Mar 1998) ...

electrolyzer
An obsolete apparatus for the treatment of strictures, fibromas, etc., by electrolysis. ... (05 Mar 2000) ...

electromagnet
<physics> A mass, usually of soft iron, but sometimes of some other magnetic metal, as nickel or cobalt, rendered temporarily magnetic by being placed within a coil of wire through which a current of electricity is passing. The metal is generally in the form of a bar, either straight, or bent into the shape of a horseshoe. ... Source: Websters …

electromagnetic
<physics> Of, Pertaining to, or produced by, magnetism which is developed by the passage of an electric current. ... Electromagnetic engine, an engine in which the motive force is electromagnetism. Electromagnetic theory of light, a theory of light which makes it consist in the rapid alternation of transient electric currents moving transverse …

electromagnetic coupling
<physics> A means of extracting energy from a magnetically confined plasma, where the plasma expands and pushes on the confining magnetic field, causing electrical energy to be generated in the external field-generating circuits. ... (09 Oct 1997) ...

electromagnetic fields
Fields representing the joint interplay of electric and magnetic forces. ... (12 Dec 1998) ...

electromagnetic flowmeter
A flowmeter in which a magnetic field is applied to a blood vessel to measure flow in terms of the voltage developed by the blood as a conductor moving through the magnetic field. ... (05 Mar 2000) ...

electromagnetic force
<physics> One of the fundamental forces of interaction which influences charged entities. In quantum field theory, the electromagnetic force is mediated by particles of exchange called (virtual) photons. ... Photons are massless and travel at the speed of light c. The electromagnetic force obeys an inverse square law, which makes sense because …

electromagnetic induction
Electromagnetic waves propagated by induction in an electromagnetic field. ... (05 Mar 2000) ...

electromagnetic lens
<apparatus> An electromagnet designed to produce a suitably shaped magnetic field for the focusing and deflection of electrons or other charged particles in electron optical instruments (cf. Electrostatic lens.) ... See: microscope, electron. ... (05 Aug 1998) ...

electromagnetic radiation
<physics> Radiation (such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays) which consists of associated, interacting electric and magnetic field waves which travel at the speed of light. ... All forms of electromagnetic radiation can be transmitted through vacuum. Electromagnetic waves in plasmas are ge …

electromagnetic unit
The unit in an absolute system (CGS) of unit's utilizing the magnetic effects of current; e.g., abampere, abfarad, abhenry, abohm, abvolt. ... (05 Mar 2000) ...

electromagnetic wave
<physics> A wave of electric and magnetic fields that can move through space. Particles which make up the waves are called photons. ... (09 Oct 1997) ...

electromagnetics
Phenomena involving magnets, electric currents through conductors and the electric and magnetic fields thus produced, as in electric motors. ... (12 Dec 1998) ...

electromagnetism
<physics> The magnetism developed by a current of electricity; the science which treats of the development of magnetism by means of voltaic electricity, and of the properties or actions of the currents evolved. ... (12 Mar 1998) ...

electromassage
Massage combined with the application of electricity. ... (05 Mar 2000) ...

electromechanical dissociation
Persistence of electrical activity in the heart without associated mechanical contraction; often a sign of cardiac rupture. ... (05 Mar 2000) ...

electromicturation
Electrical stimulation of the conus medullaris to empty the urinary bladder of paraplegics. ... Origin: electro-+ L. Micturio, to desire to make water ... (05 Mar 2000) ...

electromorph
A mutant form of a protein, phenotypically distinguished by its electrophoretic mobility. ... Origin: electro-+ G. Morphe, form, shape ... (05 Mar 2000) ...

electromotive
Producing electromotion; producing, or tending to produce, electricity or an electric current; causing electrical action or effects. ... <physics> Electromotive force, the force which produces, or tends to produce, electricity, or an electric current; sometimes used to express the degree of electrification as equivalent to potential, or more p …

electromotive force
The force (measured in volts) that causes the flow of electricity from one point to another. ... (05 Mar 2000) ...

electromuscular sensibility
Sensibility of muscular tissue to stimulation by electricity. ... (05 Mar 2000) ...

electromyogram
Synonym for electromyography ... <investigation> A test which measures muscle response to nerve stimulation. Used to evaluate muscle weakness and to determine if the weakness is related to the muscles themselves or a problem with the nerves that supply the muscles. ... Abnormal results may be seen in myasthenia gravis, polymyositis, carpal tunn …

electromyograph
Synonym for electromyography ... <investigation> A test which measures muscle response to nerve stimulation. Used to evaluate muscle weakness and to determine if the weakness is related to the muscles themselves or a problem with the nerves that supply the muscles. ... Abnormal results may be seen in myasthenia gravis, polymyositis, carpal tunn …

electromyography
<investigation> A test which measures muscle response to nerve stimulation. Used to evaluate muscle weakness and to determine if the weakness is related to the muscles themselves or a problem with the nerves that supply the muscles. ... Abnormal results may be seen in myasthenia gravis, polymyositis, carpal tunnel syndrome, amyotrophic lateral …

electron
<chemistry, physics> A stable atomic particle that has a negative charge, the flow ofelectrons through a substance constitutes electricity. ... (19 Jan 1998) ...

electron acceptor
<chemistry> A molecule or compound that gets electrons during an oxidation-reduction reaction. ... (19 Jan 1998) ...

electron beam
<microscopy> A stream of electrons in an electron optical system. ... (05 Aug 1998) ...

electron capture
<radiobiology> Nuclear decay process whereby a proton in the nucleus absorbs an orbiting electron and converts to a neutron. ... (09 Oct 1997) ...

electron carrier
<chemistry> A protein which can either accept or donate electrons in oxidation-reduction reactions. ... (19 Jan 1998) ...

Electron Channeling Pattern
<microscopy> A pattern formed by the periodic backscattering of electrons by the specimen lattice in a transmission electron microscope. Allows determination of crystal structure and lattice parameters in crystals greater than 10 micrometres diameter. ... Acronym: ECP ... (05 Aug 1998) ...

electron cyclotron emission
<physics, radiobiology> As electrons gyrate around in a magnetic field (see also larmor radius or cyclotron radius), they radiate radio-frequency electromagnetic waves. This is known as electron cyclotron emission, and can be measured to help diagnose a plasma. ... (09 Oct 1997) ...

electron cyclotron heating
<physics, radiobiology> Radiofrequency heating scheme that works by injecting electromagnetic wave energy at the electron cyclotron gyration frequency. ... The electric field of the electromagnetic wave at this frequency looks to a gyrating electron like a static electric field, and thus causes large acceleration of the electron (larger than i …

electron diffraction
<technique> The phenomenon, or technique of producing diffraction patterns through the incidence of electrons upon matter. ... (05 Aug 1998) ...

electron donor
A molecule or compound that gives up electrons in an oxidation-reduction reaction. ... (09 Oct 1997) ...

electron gun
<apparatus> A cathode/anode device intended to produce a stream of electrons. Also used inside a video camera tube and monitor picture tube that contains a heated cathode. Electrons emitted by the gun are focused to produce the scanning beam. ... (05 Aug 1998) ...

electron image
<microscopy> A representation of an object formed by a beam of electrons focused by an electron optical system. ... (05 Aug 1998) ...

electron interferometer
An interferometer that employs an electron beam in place of a light beam. ... (05 Mar 2000) ...

electron interferometry
Interferometry in which a beam of electrons is used instead of a beam of light. ... (05 Mar 2000) ...

electron lens
<physics> A device for focusing an electron beam. ... (05 Aug 1998) ...

electron magneton
bohr magneton ...

electron micrograph
<microscopy> A photographic reproduction of an image formed by the action of an electron beam. Electron microscope ... See: microscope, electron. ... (05 Aug 1998) ...

electron microprobe
A technique of elemental analysis in the electron microscope based on spectral analysis of the scattered X-ray emission from the specimen induced by the electron beam. Using this technique it is possible to obtain quantitative data on, for example: the calcium concentration in different parts of a cell, but it is necessary to use ultra thin frozen …