Impedance increment (impedance incr.) - Dynamic NPU Manual

Impedance increment (impedance incr.)


Impedance incr.

Definition in words

Increase of impedance

Note: Impedance(complex impedance) = R + jX, where R= electric resistance, j=aeric electrical current and X= reactance (ref 1)

Definition by equation

Systematic terms

Impedance increment 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-∞


Ohm (Ω), kΩ, MΩ, etc.

Ohm= kg x m2 x s-3 x A-2


  1. 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. Doi:10.1039/9781782622451.
  2. IUPAC Goldbook homepage.
  3. BIPM homepage.
  4. Lehmann HP, Fuentes-Arderiu X, Bertello L. Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996). Pure and Applied Chemistry. 2009;68(4):957-1000. doi:10.1351/pac199668040957.

Laboratory field


Thrombosis and Haemostasis

Generic abbreviated
NPU08947 Trcs(B)—Aggregation, arachidonate-induced; impedance incr.(proc.) = ? ohm
Full result NPU08947 Thrombocytes(Blood)—Aggregation, arachidonate-induced; impedance increment(procedure) = 150 ohm
Abbreviated result NPU08947 Trcs(B)—Aggregation, arachidonate-induced; impedance incr.(proc.) = 150 ohm
Written expression The impedance increment of arachidonate-induced Aggregation by Thrombocytes in Mr. Smith’s blood is [150] ohm. The measurement is performed according to procedure defined by the laboratory.


  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Impedance increment


  • 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 Impedance increment Term established
Date Notes


2019-0906 The unit symbol for ohm, Ω, may not be displayed in some laboratory information system. Thus, the unit is displayed as “ohm”.