Knee Size Differences in Bilateral Knee Surgeries
Author Information
Author(s): Reddy Venkata Gurava Mootha, Aditya Krishna Thayi, Chiranjeevi Kantesaria, Pareen Kumar Ramireddy, Vinodh Reddy Divakar
Primary Institution: Sunshine Hospitals, Secunderabad, Andhra Pradesh, India
Hypothesis
Both sides in patients undergoing bilateral total knee arthroplasty may not be symmetrical.
Conclusion
The incidence of component asymmetry in bilateral total knee arthroplasty is around 9%, and independent sizing of both knees is recommended.
Supporting Evidence
- The incidence of femoral component asymmetry was found to be 9.2% and tibial component asymmetry to be 8.7%.
- Both groups had similar incidences of component asymmetry regardless of whether surgeries were done on the same day or at intervals.
- Statistical analysis showed no significant difference in outcomes between asymmetrical and symmetrical cases.
Takeaway
Sometimes, people's knees are different sizes, even if they are getting surgery on both at the same time, so doctors should measure each knee separately.
Methodology
Retrospective analysis of medical records of 289 patients who underwent bilateral total knee arthroplasties.
Potential Biases
The study may have bias due to its retrospective nature and lack of radiological grading.
Limitations
This is a retrospective analysis, and true anthropometric measurements of the femur and tibia were not done.
Participant Demographics
Mean age of patients was 56.2 years for same-day surgeries and 70.4 years for staged surgeries, with a male-to-female ratio of 78:100 in group A and 50:61 in group B.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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