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Variables affecting patellar height in patients undergoing primary total knee replacement
Khaled Hamed Salem1,2, Miten Rajendra Sheth3
1Department of Orthopaedic Surgery, Faculty of Medicine, Cairo University, Cairo, Egypt. khaled_hamedsalem@hotmail.com.
International Orthopaedics
|December 5, 2020
Summary
Pre-operative patellar height (PPH) is important in total knee arthroplasty (TKA). Lower PPH is linked to male gender and higher BMI, suggesting screening for obese males to improve TKA outcomes.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Patellar height alterations are common in total knee arthroplasty (TKA).
- Failure to address patella baja can lead to suboptimal functional outcomes.
- Evaluating pre-operative patellar height (PPH) and identifying risk factors for patella baja is crucial.
Purpose of the Study:
- To identify pre-operative risk factors for patella baja in patients undergoing TKA.
- To assess the correlation between patient demographics and PPH measurements.
Main Methods:
- Included 285 patients undergoing TKA.
- Recorded patient age, gender, BMI, and history of prior arthroscopy.
- Measured PPH using plateau-patella angle (PPA), Blackburn-Peel (BP), Caton-Deschamps (CD), and Insall-Salvati (IS) ratios.
Main Results:
- Multivariate analysis revealed gender and BMI significantly affect the IS ratio (p < 0.05).
- Male gender showed a significant correlation with lower PPA (p < 0.03).
- Prior arthroscopy did not significantly affect PPH measurements.
Conclusions:
- Lower patellar height is significantly correlated with male gender and high BMI.
- Obese male patients should be screened for pre-operative patella baja.
- Screening can aid surgical planning and optimize TKA results.
