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# Gas tension (tension)

Tension

### Definition in words

Partial pressure of a component in a gas phase in equilibrium with the same component dissolved in a liquid phase

### Systematic terms

Gas tension 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-∞

Pa, kPa, etc.

Vapour tension

### Reference

1. BIPM brochure. https://www.bipm.org/en/publications/si-brochure/table8.html
2. 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.

### Clinical Chemistry

Example 1
Generic abbreviated form NPU01470 P(aB)—Carbon dioxide; tension(37 °C) = ? kPa
Full form with a result NPU01470 Plasma(arterial blood)—Carbon dioxide; gas tension(37 °C) = 3.4 kilopascal
Abbreviated form with a result NPU01470 P(aB)—Carbon dioxide; tension(37 °C) = 3.4 kPa
Written expression The gas tension of Carbon dioxide in plasma from Mr. Smith’s arterial blood is [3.4] kPa. The measurement is performed at 37 °C.
Equation

Example 2
Generic abbreviated form NPU22027 P(aB; Pulmonary Artery)—Carbon dioxide; tension(37 °C) = ? kPa
Full form with a result NPU22027 Plasma(arterial blood; Pulmonary Artery)—Carbon dioxide; gas tension(37 °C) = 5 kilopascal
Abbreviated form with a result NPU22027 P(aB; Pulmonary Artery)—Carbon dioxide; tension(37 °C) = 5 kPa
Written expression The gas tension of Carbon dioxide in plasma from Mr. Smith’s pulmonary arterial blood is [5] kPa. The measurement is performed at 37 °C.
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

• ## 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 Gas tension Term established

QU50132