Validation of a stress device for the knee
Research type
Research Study
Full title
Validation of a device for performing valgus and varus stress x-rays of the knee
IRAS ID
160553
Contact name
Thomas Hamilton
Contact email
Sponsor organisation
Oxford University NHS Trust
Duration of Study in the UK
1 years, 5 months, 28 days
Research summary
X-rays are the most frequently used imaging test when evaluating the knee for joint replacement. They are noninvasive, safe and cost effective. They allow assessment of: progression of disease, appropriateness for joint replacement (in particular unicompartmental (partial) replacement) as well as likely prognosis following replacement.
Stress x-rays, where the knee is fixed and the clinician moves the tibia away from the mid-line to compress the outside half (lateral compartment) of the knee whilst an x-ray is taken and then move the tibia towards the mid-line compressing the inside half (medial compartment) whilst another x-ray is taken are the gold standard for evaluating suitability for unicompartmental (partial) knee replacement.
The use of stress views is resource intensive requiring the clinician to attend radiology from, often busy, clinics and if stress x-rays were performed in all patients this would expose the clinician to a significant number of x-rays, approximately 300 per year.
We have developed, in-house, a user and patient friendly device to perform stress views without the requirement for the clinician. The use of this device would allow stress x-rays to be performed without interrupting clinic and without additional radiation exposure.
This study, funded by the Innovation Fund (Oxford University Hospitals Trust), has been designed to validate the outcome of our stress device against clinician performed stress views. Patients will be recruited from knee clinic and will be invited to attend a research session lasting 30 minutes during which stress views will be performed under fluroscopic guidance.
REC name
South Central - Oxford B Research Ethics Committee
REC reference
15/SC/0468
Date of REC Opinion
5 Oct 2015
REC opinion
Further Information Favourable Opinion