| emergency theory | A theory of the emotions, advanced by W.B. Cannon, that animal and human organisms respond to emergency situations by increased sympathetic nervous system activity including an increased catecholamine production with associated increases in blood pressure, heart and respiratory rates, and skeletal muscle blood flow. See: relaxation response. Synonym: Cannon's theory. (05 Mar 2000) |
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| emergency | An unexpected development or happening; a sudden need for action. Origin: L. E-mergo, pp. -mersus, to rise up, emerge, fr. Mergo, to plunge into, dip (05 Mar 2000) |
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| emergency medical service communication systems | The use of communication systems, such as telecommunication, to transmit emergency information to appropriate providers of health services. (12 Dec 1998) |
| emergency medical services | Services specifically designed, staffed, and equipped for the emergency care of patients. (12 Dec 1998) |
| emergency medical technicians | Paramedical personnel trained to provide basic emergency care and life support under the supervision of physicians and/or nurses. These services may be carried out at the site of the emergency, in the ambulance, or in a health care institution. (12 Dec 1998) |
| emergency medicine | A branch of medicine concerned with an individual's resuscitation, transportation and care from the point of injury or beginning of illness through the hospital or other emergency treatment facility. (12 Dec 1998) |
| emergency nursing | The specialty or practice of nursing in the care of patients admitted to the emergency department. (12 Dec 1998) |
| emergency physician | A specialist who is expert in the diagnosis and treatment of acute illness and injury. (27 Sep 1997) |
| emergency service, hospital | Hospital department responsible for the administration and provision of immediate medical or surgical care to the emergency patient. (12 Dec 1998) |
| emergency services, psychiatric | Organised services to provide immediate psychiatric care to patients with acute psychological disturbances. (12 Dec 1998) |
| emergency supplies kit | You and your family can cope best by preparing for disaster before it strikes. One way to prepare is by assembling a Disaster Supplies Kit. Once disaster hits, you won't have time to shop or search for supplies. But if you've gathered supplies in advance, your family can endure an evacuation or home confinement. For useful information, see the MedicineNet site on YOUR FAMILY DISASTER SUPPLIES KIT. (12 Dec 1998) |
| emergency treatment | First aid or other immediate intervention for accidents or medical conditions requiring immediate care and treatment before definitive medical and surgical management can be procured. (12 Dec 1998) |
| Abbe theory of image formation | <optics, physics> Abbe's theory is based on the fact that a non-self-luminous particle, which is illuminated by an extraneous source, gives rise to diffracted light rays, in addition to the dioptric pencil. He stated that to form a good microscopical image as many of the diffracted rays as possible should be intercepted by the objective. With closely ruled lines, his theory is easily demonstrated by observing the back lens of the objective, for here the diffracted rays can be observed directly if the aperture diaphragm is closed. It can be shown that, when the illumination is arranged to exclude the diffracted images, resolution is lost. (11 Mar 1998) |
| adsorption theory of narcosis | That a drug becomes concentrated at the surface of the cell as a result of adsorption, and thus alters permeability and metabolism. (05 Mar 2000) |
| Altmann's theory | A theory that protoplasm consists of granular particles (called bioblasts) that are clustered and enclosed in indifferent matter. (05 Mar 2000) |
| Arrhenius-Madsen theory | That the reaction of an antigen with its antibody is a reversible reaction, the equilibrium being determined according to the law of mass action by the concentrations of the reacting substances. (05 Mar 2000) |