Medical HAL Lower Limb Type

Medical HAL Lower Limb Type is the clinical member of Cyberdyne's HAL family, a powered brace worn on both legs that drives the hip and knee joints. What separates it from most rehabilitation exoskeletons is where the command comes from. Electrodes on the skin pick up the faint bio-electrical signals that leak to the surface when the brain sends a movement command to a muscle. The device reads that intention, assists the movement the wearer was already trying to make, and returns the sensation of a completed step to the brain. The manufacturer's stated purpose is not to substitute for walking but to close that signal loop repeatedly, which is the mechanism it claims for improving gait function. The product is a family of three models rather than one machine. HAL-ML08 fits wearers 150-190 cm tall and 40-100 kg; HAL-ML07 is the paediatric unit, sized for 100-150 cm and 15-50 kg, weighing 9.5 kg for the double-leg configuration against 13 kg for the adult; HAL-ML05 is the older adult unit, offered in four leg-length sizes. All three run for about an hour on a custom battery and are adjusted for upper leg length, lower leg length, hip width and shoe size, so fit is decided by limb dimensions rather than height alone. Every model can be worn on one leg or both, and an operator screen called the HAL Monitor shows the incoming signal pattern, the centre of balance and the phase of the gait cycle. Regulatory history is the clearest record of the product's age. The US Food and Drug Administration cleared the device three times under 510(k): K171909 on 17 December 2017, K201559 on 2 October 2020 and K233695 on 7 May 2024. In Europe HAL-ML05 carries a CE mark under the old Medical Device Directive, while HAL-ML07 and HAL-ML08 are CE marked under the current Medical Device Regulation. Cyberdyne states that cleared indications differ by country, and that clinicians must complete a structured safety training programme before using the device. The catalogue records 2014 as the year because the product page is documented from January 2014; the manufacturer does not publish a launch date.

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