Zimmer Biomet iASSIST Knee Manual page 40

iASSIST 2-Pod Version Surgical Technique
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Tibial Registration (cont.)
5. Use three 3.5 X 38 mm hex head screw to secure
the tibial adjustment mechanism to the bone.
Note: Secure the tibial adjustment mechanism
to the bone by first securing screws in the
upper lateral hole, secondly in the lower lateral
hole, and finally in the medial hole.
Warning: Control the speed of the power tool
or finish fixating the screws manually to avoid
stripping the cortex of the tibia. The 500 RPM
adaptor of the Zimmer Universal Power System
Surgical Instruments can be used to secure
screws.
From registration to validation, the instruments
must remain stable and properly fixated to the
bone to ensure accuracy of the system.
Figure 3.14
Tibial Registration (Continued)
6. Disconnect the tibial aligner by grasping the
instrument by the grip (blue highlight) and
pulling it up and away from the tibial adjustment
mechanism.
7. Loosen the blue knob on the distal part of the tibial
alignment guide.
8. Position the rod of the tibial alignment guide to
an initial starting orientation per the preset
position (L or R) on the distal part of the tibial
alignment guide.
For a left knee procedure, the preset position is L.
For a right knee procedure, the preset position is R.
9. Install the distal part of the tibial alignment guide
on the ankle by firmly gripping the distal clamps
around the malleoli until both spikes are fully
inserted into the tibia.