36
Bone Preparation
For total knee replacement, NAVIO™ utilizes a hybrid
approach for complete bone preparation, with the
combined use of burs and saws.
The NAVIO handpiece is used to create features
on the surface of the patient bone that lock the cut
guides in place, in accordance with the implant
placement plan, for final bone preparation using
recommended saws.
For the Smith & Nephew JOURNEY™ II Total knee
implant system, the recommended saw blade
thickness is 1.35 mm.
NAVIO Setup
The following are tips and tricks to help ensure an
easy experience using the NAVIO system for
preparing the bone:
•
The handpiece and drill cables should rest on the
OR table within the sterile field. Take care not to
drop them below the table. Resting them on the
table running below the trackers and up to the
handpiece by the patient’s foot will help keep the
cables from waving in front of the bone tracker
arrays. During cutting, if the camera loses sight
of either of the bone tracker arrays, check that
the cables have not obscured any of the tracking
markers.
•
The irrigation needs to prime for approximately
20 seconds prior to active irrigation out of the
cutting tool (Figure 56). To prime the fluid, put the
system into “Cut Femur/Tibia” and depress the
black (Anspach) drill footpedal. This will run the
peristaltic on the side of the NAVIO system which
runs the fluid through the pump.
•
Remove any remaining osteophytes that may be
visible. Remove the anterior horn of the meniscus.
•
A self retractor like the Gelpie retractor has
proven useful at keeping the incision open and
bone exposed during cutting, allowing the user’s
assistant to focus on other retractions or tasks.
Figure 56.
Irrigation is set up on the side of the NAVIO sys-
tem cart to flow when the cutting footpedal is depressed.
8
Bone Cutting
