Arbitrary substance rate (arb.sub.rate)
Abbreviation |
Arb.sub.rate | ||
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Definition in words |
Change of arbitrary amount-of-substance of component B divided by the time elapsed | ||
Definition by equation |
Note: kprocedure is a constant defined by the measurement procedure (there is an approximately proportionality to a kind-of-quantity from the International System of Quantities). |
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Result type |
Rational scale |
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Unit |
International unit (IU) or procedure defined unit (p.d.u.) (non-SI units). | ||
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. If the unit is an International Unit (IU), an international certified reference material (e.g. WHO reference material) is specified in the specification to the kind-of-property. If there exist no international certified reference material, the laboratory can specify the unit at the placeholder, procedure defined unit. |
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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. doi:10.1039/9781782622451. |
Laboratory field |
Examples |
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Clinical Microbiology |
Example 1 | |
Generic abbreviated |
NPU29226 T-lymcs(B)—Interferon gamma release; arb.sub.rate(stim.; Rv3874; Rv3875; Rv2654c (38-56); IS Gxg01-902-535; proc.) = ? × 103 IU/L | |
Full result | NPU29226 T-lymphocytes(Blood)—Interferon gamma release; arbitrary substance rate(stimulated; Rv3874; Rv3875; Rv2654c (38-56); IS Gxg01-902-535; procedure) = 5 × 103 International Unit per litre | |
Abbreviated result | NPU29226 T-lymcs(B)—Interferon gamma release; arb.sub.rate(stim.; Rv3874; Rv3875; Rv2654c (38-56); IS Gxg01-902-535; proc.) = 5 × 103 IU/L | |
Written expression | The arbitrary substance rate of Interferon gamma release of T-lymphocytes in Mr. Smith’s blood is [5] × 10³ IU/L. The measurement is performed after stimulation with Rv3874; Rv3875; Rv2654c (38-56) in a procedure defined be the laboratory. “IU” and its magnitude is defined by the Certified Reference Material, IS Gxg01-902-535 from WHO. | |
Equation
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Example 2 | ||
Generic abbreviated |
NPU57225 T-lymcs(B)—Interferon gamma release; arb.sub.rate(stim.; phytohemagglutinin; proc.) = ? (p.d.u.) | |
Full result | NPU57225 T-lymphocytes(Blood)—Interferon gamma release; arbitrary substance rate(stimulated; phytohemagglutinin; procedure) = 0 arbitrary unit per second | |
Abbreviated result | NPU57225 T-lymcs(B)—Interferon gamma release; arb.sub.rate(stim.; phytohemagglutinin; proc.) = 0 arbitrary unit/s | |
Written expression | The arbitrary substance rate of Interferon gamma release of T-lymphocytes in Mr. Smith’s blood is [0] arbitrary unit/second. The measurement is performed after stimulation with phytohemagglutinin by a procedure defined be the laboratory. | |
Equation |
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Notes | “Arbitrary unit/second” was chosen by a local laboratory as a proprietary measurement unit and not anaccepted international unit. | |
Reference |
NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx |
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Kind-of-property
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Nominal kind-of-property
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Kind-of-quantity
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Unitary kind-of-quantity
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Rational unitary kind-of-quantity
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Arbitrary substance rate
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Reference |
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Date | Term | Note |
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2017-10-02 | Arbitrary substance rate | Term established |
NPU term identifier |
QU103844 |