KneeAlign
®
2 System
Surgical Technique Manual
KneeAlign
®
2 System
Surgical Technique Manual
18
19
trOuBLeSHOOtIng
trOuBLeSHOOtIng
Sensor not attached correctly to femoral jig.
Reattach sensor as shown in Screen F3.
Generic hip point failure. Press center button to repeat maneuver.
No maneuver detected. Press center button to repeat.
Calibration step during set-up invalid due to incorrect attachment of sensor.
Reattach sensor correctly and repeat validation steps.
Press center button to repeat maneuver, increasing femoral rotation to at least 10°.
Jig pinned out of range of valid varus/valgus and/or flexion/extension values.
Adjust or re-pin jig into neutral position and press center button to repeat maneuver.
If jig re-pinned, back up to Femur Step 1.
Hold knee steady before beginning maneuver.
Sensor medial-lateral position on tibial jig was changed during registration process.
Attach sensor to lateral side of tibial jig and restart tibial navigation Step 3
(Register Lateral Malleolus).
There is a major system fault and navigation unit must be turned off and replaced.
Please recover faulty unit and return to manufacturer for analysis.
Hip point registration maneuver performed too slowly in either, or both anterior/posterior
(A/P) or medial-lateral (M/L) planes. Press center button to repeat maneuver at higher
speed sufficient to obtain green color bars for both A/P and M/L speeds.
Sensor signal is lost. Remove and reattach sensor battery to re-establish connection.
Hip point registration maneuver not finished prior to end of navigation unit beeping stream.
Press center button to repeat maneuver, finishing maneuver and returning knee to
starting position prior to end of unit beeping stream.
Knee was not returned to starting position at end of maneuver. Press center button to
repeat maneuver, returning knee to within ± 2 cm and ± 5° rotation of starting position
prior to end of unit beeping stream.
During hip point registration, software conducts a check for consistency of data
throughout the maneuver. Inconsistent data triggers a rejection of registration. This
can be caused by movement of pelvis, inadequate fixation of microblock to femur or
excessive deceleration when heel is repositioned at the end of maneuver. If maneuver
was conducted without these errors, press right button to proceed. Press center button
to repeat maneuver if desired, ensuring the following:
•
Use three headed pins (provided with KneeAlign® 2 System) to mount the microblock
to femur. Ensure microblock is secured with firm, three-point contact to femur.
•
At end of hip point maneuver, place heel down gently.
•
Stabilize pelvis during maneuver and ensure femur is free to move through full range
of motion.
Setup
Femur mAneuVer
(cont.)
Femur mAneuVer
tIBIA
SyStem