| Van Slyke's formula | The value obtained when the square root of the urine flow (when below 2 ml/min) is multiplied by the urine urea concentration and divided by the whole blood urea concentration; represents an old empirical adjustment for the effect of low urine flow on urea excretion; sometimes corrected for body size by dividing by some function of body weight or surface area. Later, plasma concentration was substituted for blood concentration in the calculation. The normal value is about 54 ml/min per 1.73 m2 in an adult person. Synonym: Van Slyke's formula. (05 Mar 2000) |
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| Mall's formula | A formula for determining the age (in days) of a human embryo; calculated as the square root of its length (measured from vertex to breech) in millimeters multiplied by 100. (05 Mar 2000) |
| Ranke's formula | A = grams of albumin per liter of a serous fluid: then, A = (sp. Gr. -1000) × 0.52 -5.406. (05 Mar 2000) |
| rational formula | In chemistry, a formula that indicates the constitution as well as the composition of a substance. (05 Mar 2000) |
| genomic formula | <molecular biology> The method used to identify the number of sets of chromosomes within a cell or organism (i.e. Its ploidy). Each set is designated n so one set is n is haploid, two sets is 2n is diploid, three sets is 3n is triploid, four sets is 4n is tetraploid, etc. Also, 2n+1 is known as trisomy (i.e. Two full sets plus a third copy of one of the chromosomes). (09 Oct 1997) |
| vertebral formula | A formula indicating the number of vertebrae in each segment of the spinal column; for man it is C. 7, T. 12, L. 5, S. 5, Co. 4 = 33, the letters standing for cervical, thoracic, lumbar, sacral, and coccygeal. (05 Mar 2000) |
| Meeh-Dubois formula | A formula for predicting surface area, assuming that it is proportional to the 2/3 power of the body weight. Synonym: Meeh formula. (05 Mar 2000) |
| Meeh formula | A formula for predicting surface area, assuming that it is proportional to the 2/3 power of the body weight. Synonym: Meeh formula. (05 Mar 2000) |
| Reuss' formula | A means of estimating the approximate amount of albumin in a transudate or exudate; 3/8 (sp. Gr. -1.000) -2.8 results in a value that is a practicable indication of the percentage of albumin in the fluid. (05 Mar 2000) |
| Gorlin formula | A formula for calculating the area of the orifice of a cardiac valve, based on flow across the valve and the mean pressures in the chambers on either side of the valve. (05 Mar 2000) |
| chemical formula | <chemistry> A represention of the elemental composition of a species, subscripts are used to indicate the relative numbers of atoms of each kind of element present. (09 Oct 1997) |
| graphic formula | A formula in which the connections of the atoms and groups of atoms, as well as their kind and number, are indicated. Synonym: constitutional formula, graphic formula. (05 Mar 2000) |
| Christison's formula | A formula to determine the number of grams of urinary solids per liter, obtained by multiplying 2.33 by the last two figures of the specific gravity of the urine. Synonym: Christison's formula, Trapp's formula, Trapp-Haser formula. (05 Mar 2000) |
| Runeberg's formula | A formula for estimating the percentage of albumin in a serous fluid, similar to Reuss' formula except that, instead of 2.8, 2.73 is subtracted in the instance of a transudate, and 2.88 in that of an inflammatory exudate. (05 Mar 2000) |
| molecular formula | In chemistry, a formula indicating the kind and number of atoms in the molecules of a substance, or its composition, but not the relation of the atoms to each other or the intimate structure of the molecule. Synonym: molecular formula. (05 Mar 2000) |