NaviPro^® Hip

Image-Free™ Hip Navigation

A revolutionary New Approach… “Optimize and Document”
NaviPro® is the first truly practical and affordable navigation system that provides the surgeon with the ability to determine cup position, leg length and femoral offset with newfound accuracy*.

The literature highlights the importance of optimization of cup position, leg length and femoral offset to minimize potential problems of dislocation2,3,6-9, gait4,5 and high joint reaction forces, all of which can lead to accelerated component wear and loosening1,10.

The NaviPro system uses an advanced computational approach to overcome limitations associated with measuring complex three-dimensional anatomy intraoperatively so that these parameters can be measured, optimized and documented.

Universal – Can Be Used With Any Hip Implant System
All the basic functions of the NaviPro system can be used with all current hip implant systems. A NaviPro tracker is easily adapted to typical current cup inserter instruments to allow precise orientation of cup position. Leg length and femoral offset measurements are universally accomplished with any implant system during trialing and after final implant placement.

Practical and Easy to Use
Unlike other surgical navigation systems the NaviPro system is “Image Free.” No CT, MRI or fluoroscopic imaging is needed. All data is acquired by simple and quick intraoperative registration techniques. Trackers are attached to the pelvis and proximal femur* prior to dislocating the hip. They are then utilized throughout the case to monitor the relative position of the femur and pelvis in order to provide you with accurate feedback on leg length and offset changes.

A unique table positioner* orients the patient and provides touch points that allow accurate definition of the anterior pelvic plane. This pelvic plane becomes the reference for true anatomic cup anteversion and abduction positioning.

A short series of descriptive screen images walk the user through the simple steps required to “navigate” the hip. A printout of the relevant results is available at the end of the surgical case for inclusion with the patient chart.
Additionally, NaviPro’s Virtual Caliper™ tool is always available, allowing you to precisely measure and document the distance between any two points in 3D space using the NaviPro probe. Applications for this unique measurement tool are unlimited.

Affordable
The NaviPro hardware/software package is available to the hospital for a fraction of the cost of competitive navigation systems. The NaviPro system’s low cost means that your institution – regardless of size – has the opportunity to offer this leading-edge technology to your patients.

Not only is the system very affordable, it is also a dedicated orthopedic system, without software applications used by other surgical specialties. This avoids the inherent scheduling conflict associated with shared-platform systems.

Benefits Summary

• Optimize and document leg length and femoral offset to optimize joint mechanics and gait.
• Optimize and document cup position to reduce the chance of rim impingement and dislocation.
• Record data and correlate to patient outcomes.
• Offer your patients an appealing “state-of-the-art” technology.
• Additional applications for other orthopedic procedures available on this platform.

“It has been very exciting to work on development of the NaviPro System which I view as ‘breakthrough technology’ in hip and knee arthroplasty. We now have important information available to us intraoperatively that was simply never available before.” – Perry R. Secor, M.D., Lakewood, California

Patents
U.S. Patents 6,711,431, 7,634,306, 7,780,681, 8,002,772, 8,535,329, 8,271,066, & 8,657,830. Japanese Patents 4,398,732, 4,777,878, & 5,261,469. European Patents 1,569,576, 1,853,181, & 2,151,215. Additional U.S. and International Patents Pending.

Reference list

1. Davey J.R., O’Connor D.O., Burke D.W., and Harris W.H. (1993) Femoral component offset. Its effect on strain in bone-cement. J Arthroplasty. 8(1): 23-6.
2. Digioia A.M., 3rd, Jaramaz B., Plakseychuk A.Y., Moody J.E., Jr., Nikou C., Labarca R.S., Levison T.J., and Picard F. (2002) Comparison of a mechanical acetabular alignment guide with computer placement of the socket. J Arthroplasty. 17(3): 359-64.
3. DiGioia A.M., Jaramaz B., Blackwell M., Simon D.A., Morgan F., Moody J.E., Nikou C., Colgan B.D., Aston C.A., Labarca R.S., Kischell E., and Kanade T. (1998) The Otto Aufranc Award. Image guided navigation system to measure intraoperatively acetabular implant alignment. Clin Orthop. 355: 8-22.
4. Edeen J., Sharkey P.F., and Alexander A.H. (1995) Clinical significance of leg-length inequality after total hip arthroplasty. Am J Orthop. 24(4): 347-51.
5. Gurney B., Mermier C., Robergs R., Gibson A., and Rivero D. (2001) Effects of limb-length discrepancy on gait economy and lower-extremity muscle activity in older adults. J Bone Joint Surg. 83-A(6): 907-15.
6. Jolles B.M., Zangger P., and Leyvraz P.F. (2002) Factors predisposing to dislocation after primary total hip arthroplasty: a multivariate analysis. J Arthroplasty. 17(3): 282-8.
7. Lewinnek G.E., Lewis J.L., Tarr R., Compere C.L., and Zimmerman J.R. (1978) Dislocations after total hip- replacement arthroplasties. J Bone Joint Surg. 60-A(2): 217-20.
8. McGrory B.J., Morrey B.F., Cahalan T.D., An K.N., and Cabanela M.E. (1995) Effect of femoral offset on range of motion and abductor muscle strength after total hip arthroplasty. J Bone Joint Surg. 77-B(6): 865-9.
9. Moody J., DiGioia A., Jaramaz B., Blackwell M., Colgan B., and Nikou C. (1999) Inaccuracy of mechanical guides used for acetabular component alignment in THR. In: Transactions of the Orthopaedic Research Society. Anaheim, CA. p. 278.
10. Morrey B.F. (1997) Difficult complications after hip joint replacement. Dislocation. Clin Orthop. 344: 179-87.
11. Sakalkale D.P., Sharkey P.F., Eng K., Hozack W.J., and Rothman R.H. (2001) Effect of femoral component offset on polyethylene wear in total hip arthroplasty. Clin Orthop. 388: 125-34.