| Fick method | In 1870 A. Fisk proposed that cardiac output can be calculated as the quotient of total body oxygen consumption divided by the difference in oxygen content of arterial blood and mixed venous blood. In the direct Fick method all variables are measured. The indirect Fick method employs a variety of means to avoid measuring mixed venous oxygen content. By extension, the Fick method may be used to measure cardiac output or organ blood flow with any indicator substance for which the rate of uptake or consumption, and the arterial and mixed venous concentrations, can be measured, provided the indicator does not enter or leave the system by any route not being measured. Synonym: Fick principle. (05 Mar 2000) |
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| Fick principle | |
| fick's law of diffusion | The principle that a substance put into solution will tend to diffuse towards constant concentration throughout the solution. (09 Oct 1997) |
| Fick's laws of diffusion | The direction of movement of solutes by diffusion is always from a higher to a lower concentration and the diffusive flux JA of solute A across a plane at x is proportional to the concentration gradient of A at x; i.e., JA = -D(CA/x), the increase of concentration of solute A with time, CA/t, is directly proportional to the change in the concentration gradient, i.e., CA/t = D(fl2/x2). (05 Mar 2000) |
| Fick, Adolf | <person> German physician, 1829-1901. See: Fick principle, Fick method. (05 Mar 2000) |
| Fick f. |
the equation used to determine cardiac output in the Fick method.
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| Fick m. |
a method for measuring cardiac output based on the Fick principle applied to pulmonary blood flow: the rate of oxygen consumption by the lungs, when divided by the arteriovenous oxygen difference (the difference in oxygen concentration between the arterial and venous systems), gives the rate of blood flow across the pulmonary capillaries and the cardiac output. See also indicator dilution m.
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| Fick p. |
a restatement of the law of conservation of mass used in making indirect measurements: the amount of a substance taken up or released by an organ is the product of the blood flow to the organ and the concentration difference of the substance between the arterial and venous systems. It is usually applied as the Fick method (q.v.) or one of the indicator dilution methods (q.v.) to determine cardiac output.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Fick's first l. of diffusion |
a substance will diffuse through an area at a rate which is dependent upon the difference in concentration of the substance at two given points.
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| Fick's first law of diffusion, formula, etc. |
see under formula, law, method, and principle.
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| Fick | liable to sudden unpredictable change |
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| Fick | marked by erratic changeableness in affections or attachments |
| Fick | unfaithfulness by virtue of being unreliable or treacherous |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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