A plastic goniometer is useful for measuring joint range of motion. This information can be used by a therapist for:
- Determining the presence of muscle, tendon or joint dysfunction (e.g. as a result of a knee sprain, for example);
- Diagnosing the underlying condition;
- Developing goals for treating the condition (i.e. how fast normal joint range of motion should return);
- Evaluating the progress the patient is making during recovery (is the joint range of motion actually improving?);
- Decide on a new treatment strategy if the original strategy isn’t working.
Plastic goniometers can also be used to measure angles when designers are fabricating an orthosis to treat a specific joint dysfunction.