A new technology has been designed to give future patients added motivation to do their exercises, allowing them to perform physiotherapy exercises at home or when out and about – during breaks at work, for instance. Experts call this telerehabilitation.
Underpinning this is a technology developed by researchers at the Fraunhofer Institute for Open Communication Systems FOKUS in Berlin, consisting of an exercise editor, a physio box and a mobile sensor unit that connects to a smartphone. The therapist uses the exercise editor to work up a training program tailored to the individual patient, increasing the intensity from week to week. The patient can then run the program at home using the physio box, a sort of mini-PC for televisions. The small computer boasts internet connectivity, a camera and a microphone. Exercise routines are displayed on the TV screen for the patient to copy. The physio box analyzes the data recorded by the camera as the patient does the exercises. Beforehand, software is used to map each patient’s bodily characteristics in 3D and translate them into a biomechanical computer model. Once the data has been interpreted, the box sends it via the internet to the rehabilitation center, where the therapist sees how the patient is progressing and can adapt the exercises accordingly.
Mobile unit to measure movement and vital signs
Alongside measurements of movements, therapists need to know their patients’ vital signs – in other words pulse, oxygen saturation levels and, in some cases, readings from an electrocardiogram. This allows them not only to assess whether the patient is performing exercises correctly but also how much of a strain they are. This is particularly important when dealing with people who have a cardiovascular disease. “In light of this, we also developed a mobile unit,” says Dr. Michael John, project manager at FOKUS. “Sensors placed in a chest strap, watch or walking stick measure vital signs like pulse, blood pressure or the quality of the patient’s movement, sending the data to a smartphone.” The therapist can set threshold values using the exercise editor; for example, if a patient’s pulse reaches a level that exceeds the limit set for them, a warning signal is emitted.