What Is A Visual Analogue Scale (VAS)?
Pain is a subjective experience. It can't be seen externally and is challenging to measure objectively. To help gauge an individual’s experience of pain, healthcare professionals use a (VAS).
A VAS is a psychometric testing tool that uses a sliding scale from 0-10 to measure the intensity of someone’s physical sensations, such as pain or fatigue. It is generally used in medical contexts and can help track symptom changes over time.
It consists of a 10cm line (or other measured unit) with anchors at the two extremes (e.g., ‘no pain’ and ‘worst possible pain’). Healthcare professionals then ask patients to mark a point that corresponds to their current physical sensations on the line. The distance between the marked point and one of the anchors is then measured, providing an objective measure of symptom intensity.
The scale is great as it is sensitive to small changes as opposed to ordinal scales which are categorised. This means that health care professionals can gauge a greater and more comprehensive picture when it comes to pain levels of a patient. They also are especially important to note change in individuals, as the scale almost acts as a sliding one. They easy to use with routine and recurrent treatment, and no training is required to administer them.











