Upper extremity joint movement: comparison of two measurement devices

Area of Science:

• Orthopedics
• Biomechanics
• Medical Device Evaluation

Background:

• Accurate measurement of joint motion is crucial for diagnosing and managing musculoskeletal conditions.
• Traditional goniometers are widely used, but new devices like the Ortho Ranger aim to improve accuracy and ease of use.
• Clinical validation of new measurement tools is essential before widespread adoption.

Purpose of the Study:

• To compare the clinical reliability of the Ortho Ranger with the standard goniometer.
• To assess the correlation between Ortho Ranger and goniometer measurements for upper extremity joints.
• To evaluate the potential advantages of the Ortho Ranger in joint motion measurement.

Main Methods:

• Three sets of measurements were taken for active shoulder, elbow, and wrist movements.
• Measurements were performed by the same individuals across three separate sessions.
• The Ortho Ranger and standard goniometer were used for comparison in healthy adult participants.

Main Results:

• The standard goniometer demonstrated higher within-session reliability compared to the Ortho Ranger.
• Strong correlations were found between the two devices for shoulder internal and external rotation.
• Poor correlations were observed for elbow joint movements, indicating significant discrepancies.

Conclusions:

• The Ortho Ranger does not offer significant measurement advantages over the standard goniometer.
• Clinical reliability of the Ortho Ranger is lower than that of the goniometer for tested joint movements.
• Further research may be needed to refine the Ortho Ranger or explore its utility in specific clinical contexts.