|
Using a Simulator to
Assess Driving Ability after Stroke, TBI, and SCI
|
|
Principal Investigators: Henry L. Lew, MD, PhD and
David L. Jaffe, MS
Project Staff: Hsiu-Chen Huang, MD, PhD and Peter
D. Fredericks
Project Categories: Stroke and Other
Objective: This pilot study investigated the use
of a driving simulator to assess the driving performance of patients after
stroke, traumatic brain injury, and spinal cord injury. We studied (1) whether
on-road evaluation correlates with evaluation on a driving simulator and (2)
whether computerized data from the simulator are useful to determine a
subject's driving ability and predicting overall on-road driving performance,
including safety.
Research Plan: For this study, a low-cost driving
simulator from Systems Technology Incorporated (Hawthorne, CA) was employed.
Subjects were recruited from the VA's Driving Rehabilitation Program and the
Comprehensive Rehabilitation Center (CRC) within the Physical Medicine and
Rehabilitation Service at the Palo Alto HCS.
The protocol consisted of three items: pre &
post-test questionnaires, a driving simulator assessment, and an in-car
assessment. A brief questionnaire was administered before and after driving the
simulator and after the on-the-road evaluation. The driving simulator
assessment consisted of three courses modeling typical driving environments:
hospital grounds driving (15-25 mph), residential areas (35-45 mph), and
commercial and freeway settings (55-65 mph). The subject's driving performance
on the simulator was scored by one investigator using a form that itemized
various driving aspects, including speed, obeying traffic signs and signals,
safety, lane tracking, lane changes, turns, steering control, following
distance, brake reaction time, throttle/brake coordination, merging into
traffic, and speed/accuracy of decisions.
Work Accomplished: A control group showed
significantly better overall simulator performance than brain injury subjects
(p<0.05). For the small number of subjects, no significant statistical
differences were noted between the TBI and CVA groups. When broken down by the
three course levels, brain injury subjects showed a significant performance
difference (p<0.05) from control subjects in the two more difficult courses
where higher driving speeds, more cars, more pedestrians, and sharper curves
were presented. Simulator and on-road performance showed significant
correlation (R2=0.804, p<0.05). This preliminary study suggested that a
driving simulator might be used to screen patients with driving problems before
an in-car assessment.
Expected Outcome: A Merit Review proposal has been
submitted to the VA to investigate the effectiveness of a high-quality
interactive driving simulator to safely assess and improve the driving
abilities and quality of life of individuals following stroke and traumatic
brain injury.
Funding Source: PVA
Funding Status: Funded 6/2002 - 8/2002
Reprinted from the 2002 Annual Report
|
|
|