Independent validation of the BPMpro sensor and BPMphysio software
The BPMpro sensor and BPMphysio software have been independently validated by two separate independent organisations, the East Sussex Healthcare NHS Trust and Oxford Brookes University. Additionally, the sensor has been validated using Kinovea Video Analysis Software. The findings of these validation exercises are detailed below.
East Sussex Healthcare NHS Trust
At a scientific meeting on 20th March 2015, a team of researchers from East Sussex NHS Trust Conquest Hospital led by Consultant Orthopaedic Surgeon Mr. Jamie Buchanan presented a paper on the validation of BPMphysio. The aims of their research were:
– To establish whether their patients find the technology acceptable and perceive any benefit from using it
– To test how accurate and reproducible the measurements are, when compared to their existing tools – goniometers and visual estimation
Their findings were that measurements were:
– Reproducible between different operators
– Comparable to their existing goniometers
– More accurate than their usual visual estimations
They concluded that in the era of patient-reported outcome measures, they hope this technology will add another dimension to the assessment of outcome after surgery and in particular to assess movement required for functional tasks. They also emphasised that their patients, regardless of age, are keen to engage with technology and to see the software used as a motivational tool during their physiotherapy sessions. To read the full report, click here.
Kinovea Video Analysis Software is a comprehensive application that primarily aids coaches, athletes and medical professionals who want to analyse videos. The validation software was used to measure the angle of a BPMpro sensor located on an engineering protractor and these angles compared to the angles displayed in the BPMphysio software.
The results of the Kinovea software confirmed the accuracy of the angles displayed by the BPMphysio software. To view the video analysis, click here.
Oxford Brookes University
The BPMpro sensor has been validated in lab trials by Oxford Brookes University and found to be on a par with OMCS. This testing compared a single BPMpro sensor placed at the centre of mass (CoM), lumbar L4, and four Qualisys cameras. The following output was compared: Acceleration, Velocity and Relative position. The table below shows how the two systems compared based on a single axis result i.e. not using all 6 dimensions of BPMpro:
The BPMpro sensor was also interrogated using LabVIEW 2010 and has been compared against multi-sensor systems such as Pi-Node, Xsens and OPAL. On the basis that a single BPMpro sensor was being compared to multi-camera and multi-sensor systems, the results proved to be not only very useable in a real world environment, but they also demonstrate the cost effectiveness of BPMpro.