Fick principle


Fick principle
Fick principle 'fik- n a generalization in physiology which states that blood flow is proportional to the difference in concentration of a substance in the blood as it enters and leaves an organ and which is used to determine cardiac output from the difference in oxygen concentration in blood before it enters and after it leaves the lungs and from the rate at which oxygen is consumed called also Fick method
Fick Adolf Eugen (1829-1901)
German physiologist. A professor of physiology, Fick was an advocate of the school of physiology that sought to determine quantitatively the fundamental capabilities of the organism's components and then explain these on the basis of general physicochemical laws of nature. Fick did research in fields of notable diversity: molecular physics, including the diffusion of water and gases, porous diffusion, endosmosis, and filtration; hydrodynamics as applied to the motion of fluids in rigid and/or elastic vessels; the origin and measurement of bioelectric phenomena; optics; the theory of heat in physics and physiology; and <

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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.

Medical dictionary. 2011.

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  • Fick principle — Developed by Adolf Eugen Fick (1829 1901), the Fick principle was first devised as a technique for measuring cardiac output. However, its underlying principles may be applied in a variety of clinical situations.The essence of the Fick principle… …   Wikipedia

  • fick principle — ˈfik noun Usage: usually capitalized F Etymology: after Adolph Eugen Fick died 1901 German physiologist : a generalization in physiology which states that blood flow is proportional to the difference in concentration of a substance in the blood… …   Useful english dictionary

  • Fick — may refer to:Things*Fick principle *Fick s law of diffusionPeople with the surname Fick*Adolf Eugen Fick, German physiologist usually credited with the invention of contact lenses and for Fick s law of diffusion. *Leonard J. Fick, American… …   Wikipedia

  • Fick's laws of diffusion — For the technique of measuring cardiac output, see Fick principle. Molecular diffusion from a microscopic and macroscopic point of view. Initially, there are solute molecules on the left side of a barrier (purple line) and none on the right. The… …   Wikipedia

  • Fick method — 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… …   Medical dictionary

  • principle — 1. A general or fundamental doctrine or tenet. SEE ALSO: law, rule, theorem. 2. The essential ingredient in a substance, especially one that gives it its distinctive quality or effect. [L. principium, a beginning, fr. princeps, chief] active p. a …   Medical dictionary

  • Fick's first law of diffusion formula etc. — (fiks) [Adolf Eugen Fick, German physiologist, 1829–1901] see under formula, law, method, and principle …   Medical dictionary

  • Fick — Adolf, German physician, 1829–1901. See F. method, F. principle …   Medical dictionary

  • Adolf Eugen Fick — Infobox Scientist box width = 300px name = Adolf Fick image size = 200px caption = Adolf Eugen Fick (1829 1901) birth date = 1 April 1829 birth place = Kassel, Germany death date = 21 August 1901 death place = Blankenberge, Flanders residence =… …   Wikipedia

  • Direct Fick method — The Direct Fick method is a method of measuring cardiac output using the Fick principle. It divides the oxygen intake by the difference in oxygen content of aortic blood and mixed venous blood. v …   Wikipedia


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