tailieunhanh - Báo cáo khoa hoc:" Controlling patient participation during robotassisted gait training"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Controlling patient participation during robotassisted gait training | Koenig et al. Journal of NeuroEngineering and Rehabilitation 2011 8 14 http content 8 1 14 Hill JOURNAL OF NEUROENGINEERING NCR AND REHABILITATION RESEARCH Open Access Controlling patient participation during robot-assisted gait training A I zxxz -X zx zd zx z IX zxzx zx I zx 2 V I zx x zx zx -X m I I z x 1 2 I zx -X zx zx I zx zx D zx rzx m -X zx v 4 I I I f -X r f I m m zx z I I 1 3 It ỉ -X vr D zx I I I zx zx z2 c ZI zxzd zx zx x -X zx zx It I I 11 I zx z4 Alexander Koenig Almena omlin Jeannine Bergmann Lukas Zimmerli Marc Boinger Friedemann Muller and Robert Riener1 2 Abstract Background The overall goal of this paper was to investigate approaches to controlling active participation in stroke patients during robot-assisted gait therapy. Although active physical participation during gait rehabilitation after stroke was shown to improve therapy outcome some patients can behave passively during rehabilitation not maximally benefiting from the gait training. Up to now there has not been an effective method for forcing patient activity to the desired level that would most benefit stroke patients with a broad variety of cognitive and biomechanical impairments. Methods Patient activity was quantified in two ways by heart rate HR a physiological parameter that reflected physical effort during body weight supported treadmill training and by a weighted sum of the interaction torques WIT between robot and patient recorded from hip and Knee joints of both legs. We recorded data in three experiments each with five stroke patients and controlled HR and WIT to a desired temporal profile. Depending on the patient s cognitive capabilities two different approaches were taken either by allowing voluntary patient effort via visual instructions or by forcing the patient to vary physical effort by adapting the treadmill speed. Results We successfully controlled patient activity quantified by WIT and by HR to a desired level. The setup was thereby individually