The Concept 4D orthosis is a dynamic corrective positioning orthosis used after obstetric brachial plexus palsy (OBPP).
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Nerves connect the brain with the body or muscles and send important information back and forth. If the nerves have been injured, for example during childbirth, this subsequently affects the child's muscles. The messages sent by the brain no longer reach the muscles in full.
Basically, the arm is supplied by the nerve plexus "plexus brachialis". The nerves run from the cervical spine through the shoulder to the upper and lower arm and are responsible for allowing the arm to move and feel. After an obstetric brachial plexus palsy (also Erb's or Klumpke's palsy, brachial plexus injury), these nerves are injured, which in turn affects the musculature and sense of touch.
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But what is the cause of an obstetric brachial plexus palsy? Basically, plexus injury is caused by serious accidents in which the nerves in the shoulder joint are massively overstretched and can partially tear. If these injuries happen during birth, it is called obstetric brachial plexus palsy, which results in paralysis of the arm nerves. Brachial plexus birth palsy occurs in approximately one in every thousand births. Risk factors include:
Mild obstetric brachial plexus palsy may heal on its own within a few weeks. If, on the other hand, the nerves are severely overstretched, the result is limited mobility, lack of strength and low sensitivity in the arm.
Everyday things, such as tying shoes, putting on a sweater or cutting bread, can become a challenge for children with plexus palsy.
Typical symptoms of obstetric brachial plexus palsy are:
Physiotherapeutic, orthopedic and surgical therapy options exist for each individual or combination of these movement changes and maldevelopments.
Orthotic treatment is recommended for rest periods - especially nighttime bed rest. An orthosis includes static and dynamic positioning elements, promotes joint correction and counteracts muscle imbalance as best as possible, among other things.
In obstetric brachial plexus palsy, the extent of paralysis can usually be prognostically assessed in the course of the first 3-9 months of life. Many plexus injuries can be treated well if they are treated conservatively or surgically in the affected child in time.
Regular physical and occupational therapy aims to strengthen the arm and stretch it. In this way, one tries to prevent it from becoming stiff and painful. It is also important to use the arm as much as possible in everyday life (e.g., swimming, climbing, or doing crafts) to combat functional impairment.
In some cases, the function of the arm can be improved by surgery. For example, reconstruction of the brachial plexus, or severed nerve cords, is possible. Redirecting healthy nerves to nerves of other essential muscles is also one of the common therapies (neurotization).
In cooperation with Dr. med. Jörg Bahm (Head of Plexus Surgery at the University Hospital RWTH Aachen) we were able to develop an orthosis which can be used as a result of a obstetric brachial plexus palsy.
The Concept 4D orthosis is individually adapted to the child and provides dynamic corrective positioning of the upper extremity in four dimensions or planes of movement: