Bionic leg brace

A bionic leg brace that supplements muscle strength is helping stroke patients to walk again.

The so-called Tibion PK100, or PowerKnee, is a robotic boot that inserts into the user’s shoe and extends up to mid-thigh. It is equipped with multiple sensors and microprocessors that can detect the user’s actions – such as making a transition from sitting to standing, or climbing stairs – and adjust its support accordingly.

Jean Nelson, vice-president of marketing of Tibion, the maker of the PowerKnee, based at NASA Research Park in Moffett Field, said: ’Basically, the device determines what the patient is trying to do and then assists in that action. The computer’s learning algorithm allows it to adapt after the first few steps.’

In addition to helping patients with neuromuscular impairment due to stroke, multiple sclerosis or Parkinson’s disease, Tibion designed the PK100 to serve individuals suffering from osteoarthritis or those recovering from knee surgery.

The battery-operated device can be personalised according to a user’s height, weight and physical needs. For example, the knee angle can be adjusted for those who do not have full range of motion.