Goniometry
Pronunciation: go-nee-OM-eh-tree
The measurement of joint angles using a goniometer to quantify range of motion for assessment and outcome tracking in rehabilitation.
Full Definition
Goniometry is the clinical measurement technique used in PM&R and physical therapy to objectively quantify the degrees of motion available at a joint. A goniometer — a protractor-like instrument with two arms — is aligned with anatomical landmarks and the joint axis to record active and passive range of motion. Values are documented in degrees and recorded using standard anatomical planes (e.g., flexion, extension, abduction). Editors should note that 'goniometry' refers to the technique, while 'goniometer' is the instrument; the two are not interchangeable. Results are typically recorded in a table format comparing bilateral measurements. The term is always lowercase and ends in '-metry' (not '-metry' with alternate spellings).
Usage
Usage note: Distinguish 'goniometry' (the measurement process) from 'goniometer' (the instrument). In clinical reports, always specify the joint measured and whether the measurement is active or passive ROM.
In Context
- "Goniometry revealed a 30-degree flexion contracture at the right elbow that had not been documented in the referring physician's notes." — Physical therapy initial evaluation
- "Serial goniometry at weeks two, four, and six was used to track the patient's progress toward full knee extension." — Outpatient rehabilitation progress report