Name a tool used to assess pain during a physical assessment.

The Visual Analog Scale is a widely used tool for assessing pain levels during a physical assessment. It typically consists of a straight line with endpoints that represent the extreme feelings of pain: one end indicates "no pain" and the other end indicates "worst pain imaginable." Patients mark a point on the line that corresponds to their pain level, allowing healthcare professionals to quantify and communicate the intensity of the patient's pain.

Using this scale is beneficial because it's straightforward and can be easily understood by patients, allowing them to express their pain in a visual manner. It can also facilitate better pain management decisions by providing a clear measurement of the patient's pain over time and in response to treatment.

The other options listed do not serve the purpose of assessing pain. A blood pressure cuff measures blood pressure, a glucometer measures blood glucose levels, and an ECG monitor records the electrical activity of the heart. None of these tools provide a direct assessment of pain, which underscores why the Visual Analog Scale is the appropriate choice.