Arbitrary entitic amount-of-substance (arb.entitic am.s.)

Abbreviation

Arb.entitic am.s

Definition in words

Arbitrary entitic amount-of-substance of component B in system 1 compared with arbitrary entitic amount-of-substance of component B in a reference system

Note: The reference system is defined by the laboratory.

Result type

Ordinal scale
  • Value set is ranked accoding to magnitude
  • The value set and the limit of the value set are defined by the laboratory
  • The value set can be either numerical values or words.Example 1Value set={none < some < high < very high}Example 2

    Value set={low < normal< high }

    Example 3

    Value set={0 < 1 < 2}

    Example 4

    Value set={negative < positive}

    Example 5

    Value set={+ < ++ < +++}

  • Algebraic operations are not allowed (Ref. 2, 1.26)
  • Possible comparison of values (a<b, a=b or a>b)

Unit

None

Special rule(s) in the NPU syntax

“Procedure” is stated in the specification to the kind-of-property in the NPU definition.

“Procedure” indicates that the measurement procedure must be stated somewhere else than the NPU code and there may be difficulties in comparing values for the same NPU code.

Reference

  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.
  2. Mesures BIdPe. International Vocabulary of Metrology – Basic and General Concepts and Associated Terms VIM 3rd edition JCGM 200:2012 (JCGM 200:2008 with minor corrections). https://www.bipm.org: Bureau International des Poids et Mesures; 2008.

 

Laboratory field Examples Notes
Clinical Chemistry Example
Generic abbreviated form NPU04065 Ercs(B)—Protoporphyrin; arb.entitic am.s.(proc.) = ?

The reference system is defined by the laboratory.

“0” is a value according to a value set defined by the laboratory.

Full form with a result NPU04065 Erythrocytes(Blood)—Protoporphyrin; arbitrary entitic amount-of-substance(procedure) = 0
Abbreviated form with a result NPU04065 Ercs(B)—Protoporphyrin; arb.entitic am.s.(proc.) = 0
Written expression The arbitrary entitic amount-of-substance of Protoporphyrin of erythrocytes in Mr Smith’s blood is [0], compared with arbitrary entitic amount-of-substance of Protoporphyrin of erythrocytes in a reference system. The measurement is performed according to a procedure defined by the laboratory,
Thrombosis and Haemostasis Example
Generic abbreviated form NPU01769 Trcs(B)—Connective tissue activating peptide 3; arb. entitic am.s.(enz.; proc.) = ?

The reference system is defined by the laboratory.

“Normal” is a value according to a value set defined by the laboratory.

Full form with a result NPU01769 Thrombocytes(Blood)—Connective tissue activating peptide 3; arbitrary entitic amount-of-substance(enzymatic; procedure) = normal
Abbreviated form with a result NPU01769 Trcs(B)—Connective tissue activating peptide 3; arb. entitic am.s.(enz.; proc.) = normal
Written expression The arbitrary entitic amount-of-substance of Connective tissue activating peptide 3 of thrombocytes in Mr Smith’s blood is [normal], compared with arbitrary entitic amount-of-substance of Connective tissue activating peptide 3 of thrombocytes in a reference system. The measurement is performed according to a procedure defined by the laboratory,

 

  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

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 Arbitrary entitic amount-of-substance Term established.