Total knee arthroplasty using a computerized assisted stereotaxic navigation system with bluetooth communication in...

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Radiology

Background:

• Achieving correct mechanical alignment (180° hip-knee-angle, HKA) in total knee arthroplasty (TKA) can be challenging in obese patients.
• Obesity presents unique challenges in TKA due to altered anatomy and biomechanics.
• Accurate post-operative alignment is crucial for TKA longevity and patient outcomes.

Purpose of the Study:

• To compare the post-operative coronal alignment in obese patients undergoing TKA using conventional versus computer-assisted navigation techniques.
• To evaluate the impact of computer-assisted surgery on achieving the desired hip-knee-angle (HKA) in obese TKA patients.

Main Methods:

• A randomized controlled study involving 60 obese patients undergoing TKA.
• Patients were assigned to either conventional TKA or computer-assisted stereotaxic navigation surgery.
• Post-operative hip-knee-angle (HKA) was the primary outcome measure, assessed via X-ray.

Main Results:

• No statistically significant difference was found in post-operative HKA between the conventional and computer-assisted navigation groups (2.8° vs. 2.9°, p=0.87).
• One patient in the computer-assisted group was excluded due to navigation system malfunction.
• Adequate quality X-rays were available for 57 patients for analysis.

Conclusions:

• Computer-assisted navigation does not significantly improve post-operative coronal alignment (HKA) in obese patients undergoing total knee arthroplasty.
• Conventional TKA techniques may be as effective as computer-assisted navigation for achieving coronal alignment in this patient population.
• Further research may explore other potential benefits or specific subgroups where navigation might be advantageous.