What is the primary indication for the use of a goniometer in a clinical setting?

The primary indication for the use of a goniometer in a clinical setting is to assess joint flexibility. A goniometer is a specialized instrument designed to measure the range of motion and angles of joints in various positions. This measurement is critical for evaluating a patient's physical capabilities and movement restrictions, which can be essential for developing treatment plans or measuring progress in rehabilitation settings.

In physical therapy, for example, understanding how far a joint can move helps therapists create targeted exercises and interventions. Regular assessments using a goniometer can also monitor improvement over time following injuries or surgeries, ensuring that recovery is on track. Exploring the other options, scheduling patient appointments does not involve a goniometer, nor does determining a patient’s weight or visualizing internal organs. These functions are supported by different tools and processes specific to their purposes. Thus, the accurate application of a goniometer's primary function highlights its importance in assessing musculoskeletal health and movement.