A Comparison of Two Electronic Gloves in the Measurement of Joint Movement in Patients With Rheumatoid Arthritis

This is an open pilot study to assess the usability and accuracy of two electronic goniometric gloves in measuring finger joint movement in patients with Rheumatoid Arthritis.

We will use questionnaires to assess pain, stiffness and disability. We will be using an inner disposable glove worn under the electronic goniometric gloves as this will be important for infection control in clinical use.

We will calibrate the electronic goniometric gloves using wooden blocks at predefined angles using our own software calibration process to optimise the accuracy of the glove for the individual patient.

The patient will flex and extend their fingers repeatedly to get measurements of the minimum and maximum angle of flexion in their joints. During these movements we will also capture the dynamic characteristics of movement such as maximum velocity. In this study a laptop will be used to capture and record all of the measurements from the electronic goniometric glove and record the time at which the measurements were taken.

Each electronic goniometric glove will be refitted for a second set of tests to assess variability due to the fitting process. We will record a full set of data from each set of movements for later analysis.

Finally, we will assess usability and establish if patients have a preference between the two electronic goniometric gloves.

Inclusion criteria

• Male and female patients aged 18 to 80
• Diagnosis of Rheumatoid arthritis
• Patients who have significant pain and stiffness in their hands
• Correct hand size to achieve a good fit to the electronic goniometric glove

Exclusion criteria

• Poor fit for the disposable surgical glove
• Severe pain in the right hand
• Severe swelling in the right hand (rated as such by the investigator)
• Major permanent deformities in the right hand
• Active hyperextension >30 degrees in any joint of the right hand
• Broken or infected skin in the right hand
• Known to have tested positive for Methicillin resistant staphylococcus aureus (MRSA) skin infections in the past
• Unable to don the lining disposable glove without significant discomfort
• History of Latex allergy