Adequacy of power wheelchair control interfaces for persons with severe disabilities : A clinical survey

• Published in: Journal of rehabilitation research and development Vol. 37; no. 3; pp. 353 - 360
• Main Authors: FEHR, Linda, LANGBEIN, W. Edwin, SKAAR, Steven B
• Format: Journal Article
• Language: English
• Published: Baltimore, MD Rehabilitation Research and Development Service 01-05-2000; Superintendent of Documents
• Subjects: Activities of Daily Living; Automation; Biological and medical sciences; Data Collection; Disabled Persons - rehabilitation; Diseases of the osteoarticular system. Orthopedic treatment; Equipment Design - methods; Equipment Safety; Female; Handicapped people; Humans; Male; Medical sciences; Neurological disorders; Patient Satisfaction; Quality of life; R&D; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects); Research & development; Severity of Illness Index; Wheelchairs; Human; Medical equipment; Wheel chair; User interface; Electric equipment; Check; Rehabilitation; Severe; Physical rehabilitation; Displacement; Physical handicap
• ISSN: 0748-7711; 1938-1352

The extreme difficulty with which persons with severe disabilities have been taught to maneuver a power wheelchair has been described in case studies, and anecdotal evidence suggests the existence of a patient population for whom mobility is severely limited if not impossible given currently available power wheelchair control interfaces. Since our review of the literature provided little evidence either in support or refutation of the adequacy of existing power wheelchair control interfaces, we surveyed 200 practicing clinicians, asking them to provide information about their patients and to give their impressions of the potential usefulness of a new power wheelchair navigation technology. Significant survey results were: Clinicians indicated that 9 to 10 percent of patients who receive power wheelchair training find it extremely difficult or impossible to use the wheelchair for activities of daily living. When asked specifically about steering and maneuvering tasks, the percentage of patients reported to find these difficult or impossible jumped to 40. Eighty-five percent of responding clinicians reported seeing some number of patients each year who cannot use a power wheelchair because they lack the requisite motor skills, strength, or visual acuity. Of these clinicians, 32 percent (27 percent of all respondents) reported seeing at least as many patients who cannot use a power wheelchair as who can. Nearly half of patients unable to control a power wheelchair by conventional methods would benefit from an automated navigation system, according to the clinicians who treat them. We believe these results indicate a need, not for more innovation in steering interfaces, but for entirely new technologies for supervised autonomous navigation.