Closed-loop control using a stretch sensor for restoration of standing with functional electrical stimulation in complete paraplegia

The Tohoku Journal of Experimental Medicine
Y ShimadaK Hatakeyama

Abstract

A closed-loop control system for standing with functional electrical stimulation (FES) using percutaneous intramuscular electrodes in complete paraplegia is described. The system consisted of ultrafine percutaneous intramuscular electrodes, a 32-channel stimulator and a stretch sensor with active current control to detect knee buckling. The closed-loop control system was applied in a T8 completely paraplegic patient. Compared to the stretch sensor with a wide use flexible goniometer for direct current control during standing, the stretch sensor was superior to the flexible goniometer in both ease of use and response. The average time delay from the start of knee buckling until the sensor turned on was 0.56+/-0.19 seconds (Mean+/-S.D.) in the goniometer and 0.21+/-0.06 seconds in the stretch sensor. The average time delay from the start of knee buckling until the recovery from knee buckling was 1.01+/-0.05 seconds in the goniometer and 0.78+/-0.06 seconds in the stretch sensor. The continuous standing ability of the patient increased from 12 minutes with open-loop stimulation to 30 minutes with the closed-loop control. No complications such as falling occurred during clinical use. This system prevented falling due to knee buckli...Continue Reading

References

Jul 1, 1989·IEEE Transactions on Bio-medical Engineering·Y HandaT Oda
Apr 1, 1988·Journal of Biomedical Engineering·B J AndrewsP A Freeman
Jan 1, 1984·Computers in Biology and Medicine·J S PetrofskyH H Heaton
Oct 1, 1996·Archives of Physical Medicine and Rehabilitation·Y ShimadaT Matsunaga
Aug 1, 1984·Orthopedics·J S PetrofskyD E Stafford

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Citations

Oct 8, 2005·The Tohoku Journal of Experimental Medicine·Yoichi ShimadaEiji Itoi
May 19, 2006·The Tohoku Journal of Experimental Medicine·Yoichi ShimadaEiji Itoi
Feb 16, 2013·European Journal of Orthopaedic Surgery & Traumatology : Orthopédie Traumatologie·Mohammad Taghi Karimi
Apr 19, 2020·Biomedizinische Technik. Biomedical Engineering·Jannatul NaeemManfred Bijak
Jul 30, 2014·Disability and Rehabilitation. Assistive Technology·Mohammad Taghi Karimi, Francis Fatoye

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