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Measurement is an indispensable part of analytical chemistry. The result of measurement helps quantify a substance's physical property and compare it with the physical property of another substance. Each measurement comprises two components - a number indicating the magnitude and a unit of measurement as a standard for comparison. Further, the same quantity can be measured using different units of measurement, which leads to differences in magnitude.
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A physical quantity is defined either by specifying its measurement method or by stating how it is calculated from other measurements. For example, consider a metallic cube. We might define its mass and dimensions by specifying methods for measuring them, such as using a weighing machine and a meter scale. Then, we could define the volume by stating that it is the cube of its side, and we could calculate the density as the mass divided by the volume.
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Mechanical engineering is one of the oldest branches of engineering. It deals with designing, analyzing, and manufacturing machines and mechanical systems. To ensure precise and accurate calculations, units of measurement are used. They provide a standard system for expressing and comparing physical quantities.
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The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, time, temperature, electric current, amount of substance, and luminosity. These are called the SI base units.
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Recommendations on Measurement Units - Why and How.

Young Bae Lee Hansen1

  • 1On behalf of the IFCC-IUPAC Committee on Nomenclature for Properties and Units (C-NPU).

EJIFCC
|November 8, 2019
PubMed
Summary

Standardizing measurement units in laboratory medicine is crucial for accurate communication and patient safety. This study by the Committee of Nomenclature for Properties and Units (C-NPU) outlines recommendations for unambiguous unit terminology in healthcare and research.

Keywords:
health communicationhealth information interoperabilityinternational system of unitsmedical informaticsmetric systemweights and measures

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Area of Science:

  • Laboratory Medicine
  • Clinical Chemistry
  • Health Informatics

Background:

  • Millions of laboratory values are exchanged daily, requiring consistent measurement units for interpretation.
  • Inconsistent use of measurement units in laboratory medicine can lead to communication errors and patient safety risks.

Purpose of the Study:

  • To recommend unambiguous terminology for measurement units in laboratory medicine.
  • To explain the principles and rationale behind recommended measurement units for clinical practice and scientific publications.

Main Methods:

  • Review and summarization of recommendations from the Committee of Nomenclature for Properties and Units (C-NPU).
  • Analysis of the importance of standardized measurement units in daily patient care and scientific literature.

Main Results:

  • The study highlights the critical role of standardized measurement units in ensuring the comparability and meaningfulness of laboratory data.
  • Recommendations focus on adopting unambiguous terminology to mitigate communication errors.

Conclusions:

  • Implementing standardized measurement units is essential for enhancing patient safety in healthcare.
  • Unambiguous unit terminology benefits both daily patient care and scientific communication in laboratory medicine.