By: Pankaj Nagpal
Hip Replacement With Computer Navigation
Total HIP Replacement with ComputerNavigation
Total HIP Replacement
A hip that is painful as a result of osteoarthritis (OA) can severely affect your ability to lead a full, active life. HIP replacement surgery (also called hip arthroplasty) is the ultimate solution for advanced hip OA...
The prosthesis is made of two main parts : -
Acetabular component (socket) : - The acetabular component is made of a metal shell with a plastic inner liner that provides the bearing surface. The plastic used is so tough and slick...
Femoral component (stem and ball) : - The femoral component replaces the femoral head. The femoral component is made of metal. Sometimes, the metal stem is attached to a ceramic ball...
HIP Navigation
HIP Navigation provide surgeons the data they need for cup and stem positioning, leg length determination, correct femoral offset and real time intra-operative assessment of stability and range of motion. It helps the surgeon align and orient the hip implant with more precision than ever before....
How does computer navigation work ?
- In the operating room infrared optics and tracking software continually monitor the position and mechanical alignment of the joint replacement components relative to your specific anatomy.
- Minimally invasive smart wireless instruments send data about to the joint movements (kinematics) to a computer.
- The computer analyzes and displays the kinematic data on the screen in the form of charts and graphs.
- These images provide your surgeon with the angles, lines, and measurement needed to best align your hip or knee implant....
What are the potential benefits ?
- It allows your surgeon to make adjustments to within a fraction of a degree, helping to ensure optimal "fit" for your joint.
- It provides your surgeon with a comprehensive view of your joint mechanics.
- It helps your surgeon correctly position your joint in situations where it is otherwise difficult to get a good view of your anatomy.
- It may lead to improved stability for your joint and optimal range of motion for you...
MIS Hip Replacement
Minimally invasive surgery (MIS) is a general term used to describe a surgical procedure that utilizes a smaller incision(s) than conventional surgery. In some MIS procedures the amount of soft tissue (muscles and tendons, etc.) that are disrupted during surgery may also be reduced....
Complication
- The lifespan of the prosthesis : - Two major factors affecting the lifespan of the prosthesis are quality of the prosthesis and experience of the surgeon.
- Loosening : - Cause of this complication is mostly found in 6 weeks after the operation. The main of cause comes from 2 factors.
How to patient follow physician suggestion after the operation.
How to surgeon correctly position your joint.
- Length of Leg : - During surgery, surgeon has to check the length of legs which must be equal this depends on the surgeon's expertise.
Computer Navigation in Hip Replacement Surgery in India – a detail view
Some of the latest technology in joint replacement includes not only implant material advances, but also advances in how we place the components during the reconstructive surgery. There are different surgical approaches in hip and knee replacement that can make significant differences in early and late outcomes. Another technology that is attempting to improve early and late outcomes by making implant placement more accurate is computer aided surgery or CAS.
Currently all primary hip and knee replacements in my practice are being done utilizing computer guidance for implant placement. Nearly all patients are candidates for CAS except the very morbidly obese. The technology itself has been available in limited markets for a few years and mainly in knee replacement. Recent software developments have expanded the technology to hip replacement....
Hip Replacement Surgery with Computer Navigation FAQ
Question: How does computer navigation work ?
Ans : - It is similar to the Global Positioning System (GPS) you might have in your car. For example, computer-assisted knee replacement surgery captures a patient's unique anatomy and translates it to a computer screen, providing the surgeon with an unobstructed view of the patient's knee joint....
Question: What is the advantage of computer navigation for joint replacement surgery ?
Ans : - In nearly 30 years of peer-reviewed orthopedic literature, it is clear that the single most important determinant of long-term survival of a total knee or hip implant in a patient is the alignment of the implant with respect to the whole leg. The more accurate the alignment, the longer the implant will last.....
Question: How much more accurate is computer assisted surgery ?
Ans : - Until the advent of computer navigation we were able to align the joint replacement device to within 7 to 9 degrees of optimal alignment. With computer navigation we can be reasonably certain of achieving an alignment within 3 degrees. That is better than a 50 percent improvement....
Question: So how much longer will a computer assisted hip or knee replacement last ?
Ans : - Longevity of a replacement varies from individual to individual. That being said, a standard knee implant without the assistance of computer navigation typically lasts 10 to 15 years. With computer-assisted surgeries, a knee implant is more precisely aligned to minimize joint wear, potentially extending the life of the implant to up to 30 years. We can't say that with absolute certainty yet because we don't have enough data but we will in the years ahead....
Question: Does computer navigation help shorten the recovery period for knee and hip surgery ?
Ans : - There is no conclusive evidence that it does. However, the technology is a perfect complement to minimally invasive surgical procedures which frequently do result in an easier and faster recovery for the patient. Surgeons can operate through smaller incisions (4 to 6 inches compared to 10 to 12 in standard, open surgery) This causes less trauma to the surrounding tissue, which can lead to less post-operative pain, quicker restoration of mobility, and a shorter hospital stay....
Question: Does computer navigation provide similar benefits for hip replacement surgery ?
Ans : - Absolutely. Computer navigation allows us to accurately orient the socket for optimal stability of the ball connection. This, in turn, makes the joint more resistant to dislocation. Another issue that is impacted by orientation of the hip replacement is the length of the leg. Without computer navigation, leg length may vary between a centimeter shorter and a centimeter longer...
Computer navigation eliminates the need for invasive drilling to place alignment hardware in the bone while significantly improving alignment accuracy.
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