New telemedicine exercise therapy

June 1, 2018, Fraunhofer-Gesellschaft
Rehabilitation in your own living room: Hip- and knee-joint patients could soon benefit from new telemedical exercise therapy. Its effectiveness has been proven. The product should be available on the market in 2019. Credit: Fraunhofer FOKUS

Anyone who gets an artificial hip or knee joint has to spend a lot of time in rehabilitation. The offers are scarce, though, and working people often cannot make the appointments due to time constraints. The result: the therapy is delayed, there are additional costs, and there is the added risk of possible health restrictions. In the ReMove-It project, Fraunhofer and its partners have developed telemedicine-based exercise therapy that allows patients to organ-ize their rehabilitation more flexibly. The efficacy has already been proved in a representative study, and ReMove-It is expected to be approved as a medical device by 2019.

Artificial hip and knee joints are the most frequent reason for measures in Germany. Patients have to undergo extensive inpatient rehabilitation in order to be able to quickly regain their normal movement. The problem: in structurally weak regions, there are often not enough offers available. At the same time, booked health programs are not attended either because the dates collide with the working hours or the trips to the rehabilitation clinic are too long. "This is particularly a challenge for working people in rural areas. Internet-based telemedicine offers can be a useful supplement in such cases," says Dr. Michael John of the Fraunhofer Institute for Open Communication Systems FOKUS.

Medical device by 2019

In the "ReMove-It" project, the Berlin researchers have collaborated with rehabilitation clinics, sports physicians and rehabilitation scientists to develop a telemedicine-based exercise following hip or knee replacement. It is based on the MeineReha system of the Fraunhofer FOKUS. The partners have demonstrated its effectiveness through a representative study and want to offer it as a for inpatient and outpatient rehabilitation facilities starting in 2019.

At the heart of telemedicine-based exercise therapy are videos in which the therapist performs the prescribed exercises and the patient imitates them in front of the screen. The videos are recorded by the respective therapists themselves and individually tailored to each patient. Standing, sitting and lying exercises are possible. If the patient does not comply with the medical guidelines, he receives correction instructions during the performance of the movement. After completing the exercise, the patient receives feedback concerning the quality of performance in the form of red and green marks attributed to the upper body, arms and legs. Following the therapy session, the medical staff in the clinic receives the movement data documented during the exercise procedure via the Internet. The supervising physician and therapist thereby have an overview of the level of performance and development of the patient in order to optimally adapt the treatment plan to the progress of the therapy. The treating physician, therapist and patient remain in constant contact with each other with the help of text, audio and video messages. Patients have to buy a small 3-D cam with Internet access and the corresponding software as well as to have a standard TV screen. They are introduced to the use of the system by therapists.

The patients benefit from individual therapy which is independent of location and time. The system's degree of accuracy is so high that the exercise performance and training success can be measured in real time. This is ensured by an algorithm programmed by the Berlin researchers. It continuously adjusts the patient's exercise patterns that are recorded by a 3-D cam with optimal parameters that have previously been defined together with the therapists and patients, such as the angle or the position of the joints, as well as skeletal data.

Digital exercise therapy satisfies the highest IT safety standards. The results of the exercises find their way to the therapists in pseudonymized, encrypted form via the Internet. "The therapists can organize their treatment plans more flexibly. For example, home-office models for them are now conceivable," says John.

Treating heart and Parkinson's patients

Following the proof of efficacy, the partners now want to make the system fit for approval. This also includes a cost-effectiveness concept which takes into account the cost requirements of pension insurance companies, health insurance, doctors and rehabilitation specialists and which is based on price models for conventional inpatient and outpatient care. "By 2019, we plan to offer a medical device that costs between 29 and 49 euro per month. At the same time, we're testing its use for other common diseases that can be treated with exercise therapy, such as cardiovascular disease or Parkinson's," says John.

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