Pressure (pr.) - Dynamic NPU Manual

Pressure (pr.)


Absolute pressure, total pressure (of gas mixture), volumic hydraulic energy, areic force



Definition in words

Force, as a scalar quantity, exerted by a fluid normal to a plane divided by the area of that plane

Definition by equation

Systematic terms

Pressure of component B in system 1
Ratio scale
  • Value sets are positive numerical values
  • Algebraic operations are allowed (a=nb; a≠nb)
Numerical values from 0-∞


Pa, kPa, mmHg, etc.

Note: mmHg is a non-SI unit accepted for use with the SI, and units based on fundamental constants. 1 mmHg= 133.322 Pa

Non-recommended term

Hydrostatic volumic energy, hydraulic pressure, hydrostatic pressure


  1. IUPAC Gold Book.
  2. BIPM brochure.
  3. 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


Clinical Chemistry

Generic abbreviated
NPU57947 Artery(spec.)—Blood; pr.(systolic; proc.) = ? mmHg
Full result NPU57947 Artery(specification)—Blood; pressure(systolic; procedure) = 120 mmHg
Abbreviated result NPU57947 Artery(spec.)—Blood; pr.(systolic; proc.) = 120 mmHg
Written expression The systolic pressure of blood in Mr Smith’s right brachial artery is [120] mmHg. The measurement is performed according to a procedure defined by the laboratory.

The laboratory specifies the anatomical location “right brachialis artery” by the laboratory.


  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Pressure


  • 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 Pressure Term established.

NPU term identifier