NextStep Robotics Inc.
The randomized study (in Phase II of the U44) compares the efficacy and durability of 9 weeks (18 sessions) of robot-assisted physical therapy (PTR) versus physical therapy (PT) alone on foot drop as assessed by gait biomechanics (ankle angle at initial contact, peak swing ankle angle, number of heel-first strikes - % total steps, gait velocity) and blinded clinician assessment (dorsiflexion active range of motion, ankle muscle strength, assistive device needs).
This proposal investigates a portable ankle robot (AMBLE) to be used during over-ground mobility training to reduce foot drop and improve walking function in hemiparetic (half-body, partially paralyzed stroke patients with foot drop (inability to properly lift and clear the foot during walking. About 30% of stroke survivors are left with permanent ankle weakness that impairs their mobility and increases fall-risk. Currently, stroke survivors with foot drop live with a cane or other assistive device, and often ankle-foot braces (AFOs) for safety. These assistive devices do not reverse or reduce…
Inclusion Criteria: * Ages 18 and older * In the subacute phase of stroke recovery (\>6 weeks to \<6 months post-stroke) with residual hemiparesis of the lower extremity that includes symptoms of foot-drop. - or - In the chronic phase of stroke recovery (\>6 months post-stroke) with residual hemiparesis of the lower extremity that includes symptoms of foot-drop. * Clear indications of hemiparetic gait by clinical observation Exclusion Criteria: * Cardiac history of (a) unstable angina, (b) recent (less than 3 months) myocardial infarction, congestive heart failure (NYHA category II); (c) he…
Subjects receive 18 one-hour PT training sessions over 9 weeks while wearing the robot initially parameterized to individual deficit severity. Subjects perform over-ground mobility tasks of increasing challenge with robotic assist, as needed. Training is generally divided into 3 phases based on individual ability to address gait deficits, postural transitions, physical demand and environmental terrain.
Subjects receive 18 one-hour PT training sessions over 9 weeks. Subjects perform over-ground mobility tasks of increasing challenge with therapist assist, as needed. Training is generally divided into 3 phases based on individual ability to address gait deficits, postural transitions, physical demand and environmental terrain.
Participants enrolled in the physical therapy only group will be given the option to re-enroll as a cross over participant to receive 18 one-hour PT training sessions over 9 weeks while wearing the robot initially parameterized to individual deficit severity. Subjects perform over-ground mobility tasks of increasing challenge with robotic assist, as needed. Training is generally divided into 3 phases based on individual ability to address gait deficits, postural transitions, physical demand and environmental terrain.
Chronic stroke subjects receive 18 one-hour PT training sessions over 9 weeks while wearing the robot initially parameterized to individual deficit severity. Subjects perform over-ground mobility tasks of increasing challenge with robotic assist, as needed. Training is generally divided into 3 phases based on individual ability to address gait deficits, postural transitions, physical demand and environmental terrain.
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