A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 1/36 (2006.01)
Patent
CA 2097857
1 ABSTRACT OF THE DISCLOSURE The motor function of a partially or completely paralyzed muscle is restored by implanting a nerve electrode, e.g. a cuff electrode, for sensing electrical signals from a sensory nerve which innervates a part of the body which is phy- siologically related to the partially or completely paralyzed muscle, stimulating the paralyzed muscle by means of a muscle stimulator, sensing by means of said nerve electrode an electrical signal from the sensory nerve, producing a further control signal for reactivating the muscle stimulator dependent on the electrical signal sensed after the expiration of a predetermined period of time after the stimulation of the muscle, and restimulating the paralyzed muscle in response to said further control signal. The electrical signal is amplified, band-pass-filtered, and optionally rectified and bin-integrated when producing said further control signal. The bin-integration is performed by means of an integrator having an adjustable integration period, said integrator being synchronized with the muscle stimulator. A secure grip of an object through FES of a partially or completely paralyzed muscle which is involved in holding the object, is obtained by detecting the start of a slip of the object from the ENG signal from the nerve electrode and immediately upon detection of the start of a slip producing or modifying a control signal for activating a muscle stimulator stimulating the paralyzed muscle. The start of the slip is detected automatically as an event that exceeds a predetermined threshold value in that the ENG recorded from the sensory nerve is processed using analog or digital circuitry, and a low pass-filtered version of the ENG, delayed by a number of samples, is subtracted from the actual electrical signal sensed, thereby removing unrelated background activity from the signal.
Haugland Morten
Hoffer Andy
Sinkjaer Thomas
Gowling Lafleur Henderson Llp
Haugland Morten
Hoffer Andy
Sinkjaer Thomas
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