Latest news

Bioservo signs an agreement for the sale of Carbonhand[®] with Rehasys in Switzerland

Bioservo receives a major customer order in the USA corresponding to SEK 1.6 million (regulatory information)

World’s first soft robotic muscle strengthening system. Developed in collaboration with leading Fortune 500 companies


Proven to improve

With many unique features Carbonhand is developed for both assistive and rehabilitation use. Several clinical studies with close to 200 included users show statistically significant improvements in grip strength, hand functionality and other outcome measurements.

“It has given me a great deal; it got my hand going again” - MS patient 3

After four weeks of Carbonhand use4:

Carbonhand provides enhanced hand function

Carbonhand’s function is similar to that of our own hands. A hand grip is usually initiated from the fingertips to the muscles of the forearm. These muscles pull the tendons that go out to the fingers.

Carbonhand works the same way: The sensitive pressure sensors in the glove’s fingertips detect when the user grabs an object.
A microcomputer calculates the amount of power to be added and small motors pull artificial tendons that go into the glove’s fingers. The tendons pull the glove’s fingers and the extra force is created. The greater the pressure on the sensors, the more power the glove provides. Carbonhand also adjusts the power added to the weight of the object to be lifted.

Adjustable to fit your need

You can preset different grip profiles containing tailored combinations of settings that are adjusted to the useres personal needs. For example, the strength and sensitivity of the sensors as well as the amount of extra power. This may be suitable if you are in need of different amounts of power at different times. For example, there may be a need for less assistance in the morning than in the afternoon when you are tired or if you have different types of tasks that require a lot of power. All adjustments can easily be done using the Carbonhand app. Additionally, the length of the fingers in the Carbonhand glove can be adjusted to the wearer.

The Carbonhand glove is available in a variety of sizes and cable lengths in order to fit the user. The control unit can easily be worn to the belt. The total weight is approximately 700 grams, including rechargeable batteries that last for about one day.
Carbonhand is a CE marked Medical Device.

Back to work or activities of daily living?

Carbonhand as a back-to-work aid is applicable for individuals that are mostly affected by their impaired hand function at work. This can either be a program through the companies’ insurance or the countries reimbursement system. In order to get the best advice, please get in touch with us or our local distributors in the respective countries.

Activities of Daily Living (ADL)
To use Carbonhand as an assistive aid during activities of daily living, is covered by the general reimbursement scheme that many countries provide for their residents. The scope of this varies however widely between countries. In order to get the best advice, please get in touch with us or our local distributors in the respective countries.

User stories - testimonials

” I feel a lot more confident when wearing the glove.”

Maj-Britt is a zoo keeper at Lycksele Zoo in Sweden, and has been working there since the 70’s. It is a fantastic job for the one who loves animals but is also a tough and tiresome job which involves continuous lifting. There are a lot of buckets with food to carry and they are heavy.

With time, Maj-Britt suffered from wear damage in her hands. Combined with arthritis, made it more and more difficult for her to manage her duties and eventually she became part-time sick.

Through a Swedish corporate health care company, Previa, she came in contact with Bioservo and was able to try SEM Glove (the predecessor to Carbonhand®). Together they applied to “Försäkringskassan” in order to receive the glove as a work equipment and got it granted.

-When I first tried it, I was impressed by how flexible the glove is. We immediately sent a request to “Försäkringskassan” to give me access to the glove, and initially, I rented it for three months to see what results it could give.

Maj-Britt immediately noticed how great of a help the glove was when carrying heavy or performing other exhausting tasks.

-But, when at the office, I do not wear the glove. Only for the heavy duties.

Since she started using the glove, it is not only easier for her to perform, but her pain has also decreased. She is now able to lift and work as normal without any pain.

-I feel a lot more confident in my job when I am wearing the glove. I know that I will have the strength to hold on, and do not longer have to worry about losing my grip.

Since birth, Simon has been living with a brachial plexus injury. This means that nerves in his left shoulder are damaged and thus his left arm and hand has had close to no function at all. One of the things he has been missing was being able to play golf with his friends.

At the age of 14 he participated in a study with Carbonhand, for patients with brachial plexus injuries at the University Hospital of Umeå in north of Sweden. The study period was set to three months and Simon used Carbonhand as a rehabilitation device while training as well as an assistive aid during activities of daily living (ADL).

His strength and movement in hand and arm increased tremendously both during the study as well as after.

And not only did he improve during activities of daily living, he was also able to join his friends on the golf course.

During a normal day at work as a carpenter in 2016, Joakim attended a routine physical check-up through his employer to analyse potential injuries by vibration exposion.

From there, he was sent home and told he would never be able to work again. The reason was a combination of vibration injury and a nerve disease called HNPP. This means that his nerves aren’t covered by myelin and thereby more prone to being damaged.

During 2017, he got the chance to get Carbonhand as a technical working aid by the Swedish Public Employment Service (Arbetsförmedlingen). Since then, he has been using Carbonhand for both hands in order to be able to get back to work and also have strength and endurance left in his hands after work to be an active family father.

“It has given me my strength back, as well as most of the function in my hands!”

A film about Joakim and his journey with Carbonhand, made by the Swedish Public Employment Service (in Swedish).

The clinical evidence

Executing studies is of great importance to us and we are continuously working on our evidence strategy. All studies (with close to 200 participating useres) show positive effects of using Carbonhand. The result indicates improvement in both grip and pinch strength as well as improved hand function.

Ongoing clinical trials

1. Van der Sluis C.K, ten Hoff A, van Heijningen V, van der Esch, Stolwijk J, van den Broek, Rietman J.S. Therapeutic effect of prolonged use of a wearable soft-robotic glove during ADL on reduced hand function

A brief summary: A total number of 7 clinics in the Netherlands are involved in this study. The aim of the trial is to confirm the results from the different studies by an approved clinical trial that meets all existing and new regulation for clinical trials. The following are the objective:

Therapeutic effect of prolonged use of a wearable soft-robotic glove during activities of daily living (ADL) on reduced hand function.

Primary Objective:

• To examine whether prolonged use of the assistive Carbonhand© system during ADL at home results in a therapeutic effect in handgrip strength of the affected hand.

Secondary Objective(s):

• To examine whether prolonged use of the assistive Carbonhand© system during ADL at home results in a therapeutic effect in endurance of the affected hand.

• To examine whether prolonged use of the assistive Carbonhand© system during ADL at home results in improved functional performance of the affected hand.

• To examine the amount of use of the hand and Carbonhand© system during the intervention period.

• To examine whether prolonged use of the assistive Carbonhand© system during ADL at home results in an improved Quality of Life.


2. Helena Millkvist, Anna Källströmer, Birgitta Bernspang, Mikael Wiberg, Effects on participation, activity and hand function when using a grip enhancing device Carbonhand for patients with brachial plexus injury

Published clinical studies

3. Susanne Palmcrantz, Jeanette Plantin, Jörgen Borg (2019) Factors affecting the usability of an assistive soft robotic glove after stroke or multiple sclerosis. J Rehabil Med 2020; 52: jrm00027

4. Radder B, Prange-Lasonder G.B, Kottink A, Holmberg J, Sletta K, van Dijk M et al. (2019) Home rehabilitation supported by a wearable soft-robotic device for improving hand function in older adults: A pilot randomized controlled trial. PLoS ONE 14(8): e0220544.

5. Osuagwu B.A. et al. (2019) Clinical Trial of the Soft Extra Muscle Glove to Assess Orthotic and Long-Term Functional Gain Following Chronic Incomplete Tetraplegia: Preliminary Functional Results. In: Masia L., Micera S., Akay M., Pons J. (eds) Converging Clinical and Engineering Research on Neurorehabilitation III. ICNR 2018. Pp 385-389.

6. Nilsson M, Fryxell W. A, Wadell C, von Holst H, Borg J. A Helping Hand –On Innovations for Rehabilitation and Assistive Technology. Grip strengthening glove to improve hand function in patients with neuromuscular disorders. Doctoral Thesis. Stockholm: Royal Institute of Technology; 2013. ISBN 978-91-7501-703-7

7. Hashida R, Matsuse H, Totsugi M, Omoto M, Shinozaki N, Tanaka J, Nago T. (2016). Study on the Effects of Motor-Assisted Gloves (SEM Glove) on Functional Disorders of the hand.

8. Hermansson L, Gunnarsson M, Lutterman M. Effect of a grip-strengthening glove on persons with reduced hand function. (2014).


If you need more information or would like to suggest a study, please do not hesitate to contact Annika Rydgård who is responsible for our clinical trials.

* Global data, management compounded data, several sources. Reports like “Fit for Work Europe” – a study conducted by the Work Foundation across 23 European countries – musculoskeletal disorders (MSDs) reveal a growing need
** European Commission

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