Entitic volume difference (entitic vol.diff.)

by | Feb 4, 2020 | List of kinds-of-property, Kind-of-quantity

Entitic volume difference (entitic vol.diff.)

Abbreviation

 Entitic vol.diff.

Definition in words

 Difference of entitic volume of component B at different conditions in system 1

Definition by equation

Systematic terms

 Entitic volume difference of component B in system 1

Result type

 Rational scale
  • Value sets are positive numerical values
  • Algebraic operations are allowed (a=nb; a≠nb)
 Numerical values from 0-∞

Unit

fL, pL, µL, etc.

Note: The correct unit is e.g. “µm/1” but “1” is omitted.

Special rule(s) in the NPU syntax

 The different conditions must be specified in the specification to kind-of-property

Reference

 Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p.

Laboratory field

Example

Clinical Chemistry

 Generic abbreviated
 NPU18615 B—Thrombocytes; entitic vol.diff.(max.-min.; PDW; proc.) = ? fL
Full result NPU18615 Blood—Thrombocytes; entitic volume difference(maximum-minimum; PDW; procedure) = 4 femtolitre
Abbreviated result NPU18615 B—Thrombocytes; entitic vol.diff.(max.-min.; PDW; proc.) = 4 fL
Written expression The entitic volume of Thrombocytes in Mr. Smith’s blood is [4] fL. The calculation is the difference between the thrombocyte with the maximum volume and the thrombocyte with the minimum volume. Also called Platelet Distribution Width (PDW). The measurement is performed according to procedure defined by the laboratory.
Equation

Reference

NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx

  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Entitic volume difference

Reference
  • Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
  • Dybkaer R. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
Date Term Note
1996-01-01 Entitic volume difference Term established

NPU term identifier

 QU50143