Akademik

A form of line chart showing scales for the variables involved in a particular formula in such a way that corresponding values for each variable lie in a straight line intersecting all the scales. SYN: nomograph (2). [G. nomos, law, + gramma, something written]

- blood volume n. a n. used to predict blood volume on the basis of the individual's weight and height.

- cartesian n. a n. based on rectangular coordinates, representing two variables, on which a family of isopleths is superimposed for each of the additional variables involved. [from R. Descartes, French philosopher and mathematician, 1596–1650]

- d'Ocagne n. an alignment chart consisting of an arrangement of three or more graduated lines (straight or curved), each constituting a scale of values of a variable, constructed so that any straight line crossing these scales connects the simultaneously compatible values; from values for any two variables, the values of all other variables can be determined.

- Radford n. a n. used to predict necessary tidal volume for artificial respiration on the basis of respiratory rate, body weight, and sex; correction factors are supplied for activity, fever, altitude, metabolic acidosis, and alterations in dead space.

- Siggaard-Andersen n. a n. used to predict acid-base composition of blood by the slope and position of a buffer line constructed when P_CO2 on a logarithmic scale is plotted against pH.

no·mo·gram 'näm-ə-.gram, 'nō-mə- n a graphic representation that consists of several lines marked off to scale and arranged in such a way that by using a straightedge to connect known values on two lines an unknown value can be read at the point of intersection with another line