What tool is commonly used by orthopedic nurses to assess a patient's range of motion?

A goniometer is specifically designed to measure the angle of joints and, therefore, is the most appropriate tool for assessing a patient's range of motion. This instrument allows orthopedic nurses to determine the extent of movement in various joints, which is crucial for evaluating a patient’s functional status and progress during rehabilitation. Accurate measurement of range of motion can also help in diagnosing joint or muscle issues, guiding treatment decisions, and monitoring recovery over time.

Other tools listed, such as calipers, are generally used for measuring physical dimensions but are not specific for assessing joint angles. A stethoscope is used for listening to internal body sounds, and a thermometer is utilized for measuring body temperature; neither of these tools serves the purpose of assessing range of motion in orthopedic nursing.