KLS Martin group GENOS Mode D'emploi page 21

Instructions for use
KLS Martin GENOS Distractors (non sterile)
Intraoperative procedure
The incision is made dorsally and laterally over the metacarpal or metatarsal bone. Dissection
is carried out deep to expose the extensor tendon. If finger (or toe) flexion already leads to
overtension, Z-shaped extensor tendon lengthening is recommended. This not only prevents
increased compression of the MTP/MCP joint during callus distraction, but a recurring elevatus
position – or even movement restrictions – later on as well.
Now the selected distractor is put into the desired (dorsolateral) position. In line with common
osteosynthesis techniques, 2.0-mm screws are used for fixing the distractor to the bone. The
slide is opened or distracted a little (2-3 mm) to leave enough room for the osteotomy. There-
after, the osteotomy is marked out and the guiding jaws are detached from the bone after
loosening the screws. Once the distractor has been fitted, the distraction can be performed
with an oscillating saw. Note that it is essential to ensure sufficient spacing between the oste-
otomy zone and the screws, both distally and proximally, in order to prevent cortical burst
when tightening the screws of the slide. The distractor should be fixed in place under radio-
graphic control in the head area as far distally as possible, as this allows performing the oste-
otomy in the diaphyseal region. To lead out the activator, we recommend interdigital, lateral
activator positioning by stab incision.
Correct functioning of the distractor is verified intraoperatively. The adjusting mechanism must
be accessible after suture closure.
Prior to distraction
Brand-new distractors must be sent through the entire processing cycle (using suitable clean-
ing, disinfecting and sterilization methods) prior to use.
Prior to implantation, the distractor must be visually inspected for damage and tested for
proper functioning. To this end, the activator (5) (see item 5 Activator, on page 19)
must be connected to the distractor.
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