A summary of the evidence for power seat elevation

Following up on our previously published white papers on power standing and power assist devices, the Permobil Research & Development team has now compiled the available evidence on power seat elevation. 

It was concluded that power seat elevation brings the environment within reach and thereby reduces the required range of motion and the associated strain on neck and shoulders, as well as increases the possibility to independently perform activities of daily living. As power seat elevation enables to make the gap in height between the wheelchair and transfer surface as low as possible, elevation can improve the ergonomics of transfers. Individuals report that in reality, the impact of elevation is even greater, including positive impact on communication, participation, and quality of life.

Evidence from the scientific literature, lab testing, and case-reports

The primary source was a systematic literature review. Compared to other power wheelchair functionalities, there are relatively few research publications on power seat elevation. Therefore, the evidence was further expanded with three additional sources:

• pre-clinical evidence including goniometer measurements of the range of motion and quantification of the potential functional reach at different power seat elevation heights,
• supporting literature such as guidelines and position papers,
• case reports of users of power wheelchairs with seat elevation.

Main results:

Evidence was summarized in the ICF model (See diagram below)

• With power seat elevation the range of motion in the shoulders and neck needed to reach or to be at eye height is lower compared to without elevation, which may contribute to the prevention of repetitive strain injury and pain.
• Power seat elevation increases the possible functional reach and thereby can increase environmental access at a variety of levels. This facilitates the performance of independent activities of daily living, transfers, and communication.
• Although there is limited large-scale research, case reports show that elevation may benefit participation in society and has positive impacts on independence and quality of life.