Quantification of mechanical and neural contributions to...

Details Quantification of mechanical and neural contributions to... Quantification of mechanical and neural contributions to...

2011-08-23

2011-08-23

Hoekstra, Jeffrey G (Department: 3736)

Surgery

Diagnostic testing

Measuring anatomical characteristic or force applied to or...

C600S587000

Reexamination Certificate

active

08002717

ABSTRACT:
The present invention relates to a system (10) operable to evaluate spasticity in a movable extremity (12). The system (10) comprises a fixation device (14) comprising a first part (14.sub.1) connected via a movable joint (16) to a second part (14.sub.2). The fixation device (14) is operable to fix the movable extremity (12) in such a way that the rotational axis of the fixation device (14) is aligned with the rotational axis of the joint of the movable extremity (12). The system (10) also comprises a moving device (18) operable to move the second part (14.sub.2) with a first, constant velocity (V.sub.1), without any reflex contribution, and with a second, constant velocity (V.sub.2) with reflex contribution. The system (10) also comprises a force sensor (20) operable to measure a first force trace in connection with the first velocity (V.sub.1), and a second force trace in connection with the second velocity (V.sub.2). The system (10) also comprises a processor means (22) connected to the force sensor (20), the processor means (22) is operable to extract a first point (P1) and second maximum point (P2) from the second force trace, and a third point (P3) from the first force trace, which three points (P1-P3) are used to evaluate spasticity.

REFERENCES:
patent: 2007/0027631 (2007-02-01), Cabrera et al.
patent: WO 2006/102764 (2006-10-01), None
International Search Report for PCT/SE2008/050363, mailed Jun. 25, 2008.
Hughes, T.A.T. et al., “An Instrument for the Bedside Quantification of Spasticity: A Pilot Study”, 2001 Proceedings of the 23RDAnnual EMBS International Conference, Oct. 25-28, Istanbul, Turkey, vol. 1 of 4, pp. 1228-1231.
Lunenburger, L. et al., “Clinical Assessment Performed During Robotic Rehabilitation by the Gait Training Robot Lokomat”, Proceedings of the 2005 IEEE, 9thInternational Conference on Rehabilitation Robotics, Jun. 28-Jul. 1, 2005, Chicago, IL, USA, pp. 345-348.

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