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OrthoSensor Knee Balancer User Manual

Device activation and linkstation operation
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USER GUIDE
Device Activation and LinkStation™ Operation
LB-03000-003 Rev A

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Summary of Contents for OrthoSensor Knee Balancer

  • Page 1 USER GUIDE Device Activation and LinkStation™ Operation LB-03000-003 Rev A...
  • Page 2 (TKA). The Knee Balancer is capable of sensing dynamic loads and center of load* in the medial and lateral compartments of the operated knee through a full range of motion with the patella reduced.
  • Page 3 OrthoSensor Knee Balancer. LED #2 LED #1 and LED #2 indicate communication link between LED #3 Transceiver and the OrthoSensor Knee Balancer. These LED #4 LEDs will illuminate only after device is activated. LED #4 indicates that Transceiver is active.

  • Page 4: Device Activation

    DEVICE ACTIVATION STEP 2 Launch Application Double click the OrthoSensor icon to launch application. Activate Device A. Remove appropriate size OrthoSensor Knee OrthoSensor Icon & Application Start Screen Balancer and Shims from box. Do not remove from sterile pack. Remove outer box labels and affix to patient documentation as required.
  • Page 5 LEG SELECTION STEP 3 Select LEFT or RIGHT leg The GUI will automatically prompt leg selection.
  • Page 6 “ZERO” DEVICE STEP 4 Zero Device The OrthoSensor Knee Balancer utilizes an accelerometer to assess component position* and leg flexion angle*. The “zero” process calibrates the accelerometers to enable these functions and is accomplished in three steps. Note that the GUI prompts user to execute each step in the “Zero” process.
  • Page 7 “ZERO” DEVICE STEP 4 (continued) C. Vertical Zero, step 3 Place sterile packed device flat against LinkStation post. Underside (non-articulating surface) of device should be placed against post with posterior edge pointing toward floor. Hold device in place and click the “Zero” button. “Device is Ready for Use”...
  • Page 8 DEVICE READY FOR USE STEP 5 The OrthoSensor Knee Balancer is now ready for use. Verify Device Activation While still in sterile packaging, apply pressure on the device to verify that loads are registering on the GUI. (FIGURE I) NOTE: If loads do not register then the device may...
  • Page 9 ATTACH SHIMS STEP 6 The OrthoSensor Knee Balancer is packaged with four (4) shims to enable use of trial inserts with 9mm, 11mm, 13mm and 16mm thickness. A shim must be affixed to the underside of the device prior to insertion into the tibial tray.
  • Page 10 SET TIBIAL ROTATION STEP 7 Select and position appropriate size Trial Tibial Tray to achieve maximum tibial plateau coverage. The tibial tubercle mid-middle 1/3 is marked and a single anterior pin is inserted to allow rotational adjustments and maintain medial-lateral position. Tibial trial with anterior medial pin inserted, PCL to medial 1/3 tibial tubercle is marked...

  • Page 11: Device Insertion

    In this instance, reduce the tibia under the femur, then insert the femoral trial with minimal impaction force. OrthoSensor Knee Balancer (size 5) inserted on the tibial NOTE: Excessive impaction force may damage or plate with anterior pin inserted. negatively impact function of the OrthoSensor Knee Balancer.

  • Page 12: Additional Features

    The Knee Balancer detects that it is outside of the knee if it records a flexion angle of 180º (the equivalent of resting on a table or flat surface) for seven (7) seconds.
  • Page 13 OrthoSensor™ (www.orthosensor.com) is the technology leader in development intelligent orthopedic devices that provide real-time data to surgeons and hospitals during and after surgery. OrthoSensor intelligent orthopedic devices utilize advanced sensor and communication technologies to improve healthcare outcomes and reduce the cost of treating musculoskeletal disease.

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