Dynamic shoulder abduction orthesis with adjustable spring joint
Mobilising the shoulder joint according to the Kleinert Principle
Passive abduction of the shoulder using an individuallyadjustable spring which provides constant power distribution during the whole motion sequence.
Immobilisation is possible at every angle.
A drawer mechanism upon which the upper arm frame is guided compensates for the difference in length between the upper arm and orthesis in the movement of the shoulder joint resulting from the difference in height between the centres of rotation of the shoulder and of the orthesis; this results in no pressure being exerted on the shoulder joint. The adjustment guides can be locked off for immediate post-operative application.
An elbow joint, which is also able to be locked up, allows the underarm to be extended and bent.
The hand rests on a grip.
The orthesis is fastened to the body using Velcro straps, padded support frames and pads so that it does not slip or rotate. These fixation elements can be adjusted to any size by an orthopaedic technician.
The shoulder joint is able to be immobilised or mobilised at any desired angle of adduction/abduction between 0 – 30 – 100° and of retroversion/anteversion in the horizontal plane between 30 – 0 – 30°. The elbow joint is also able to be immobilised or mobilised at any angle of extension/fl exion between 0 – 0 – 90°. The spring tension can be set so that abduction is passive.
The doctor shall make a decision regarding treatment on the basis of the diagnostic fi ndings. According to the list of therapeutic appliances, the following treatments are appropriate:
"All indications which require the shoulder to be immobilised in an adjustable position but where the aim is a targeted mobilisation, such as:
Immobilisation: In the immediate post-operative phase. For pain avoidance in the event of highly-unstable conditions (fractures, dislocations, etc.).
Passive mobilisation: For the conservative treatment of a frozen shoulder
Passive abduction: In the case of the re-fixation or reconstruction of the supraspinatus tendon. In the case of proximal humeral fractures, particularly of the greater tubercle. After endoprosthetic treatment. After arthrolysis.
Passive assisted abduction: For the step-by-step adduction towards loaded movement.
In the case of contraindications of active adduction, this can also be passive: the spring tension is set so that the arm is abducted in the shoulder joint when the elbow is bent. The arm is lowered when the elbow is extended and is then lifted after flexion.
It is recommended that the Omolift be adjusted to the patient a few days before the operation and that the functions are explained to the patient.
Kleinert Principle on electromyographic shoulder findings
The dynamic treatment of the shoulder joint with the help of the Omolift device follows the Kleinert protocol involving the reflective relaxation of the antagonist in tensioning the antagonist musculature - taken from the dynamic treatment of lesions to the flexor tendons in the hand.
Taking the shoulder joint as an example in this case, this means that the supraspinatus, as the most frequently-damaged structure in active adduction, is relaxed and therefore does not exert any pressure on its tendon or on the greater tubercle as a socket to the humerus.
In an electromyographic examination of 10 healthy supraspinati and 6 infraspinati muscles, we were able to provide impressive proof for the success of this principle (G. Heide, O. Ferber).
The abduction of the shoulder joint is performed passively thanks to the spring tension of the Omolift device – without the suprasinatus or infraspinatus being strained.
If Omolift is used properly, there is no added risk of re-rupturing the tendon of the supraspinatus after reconstruction or secondary dislocation of the greater tubercle after fracture and/or re-fixation.
Available in both right- and left-hand models.
Each orthesis can be modified from a right-hand model to a left-hand one and vice versa.