Robotic-assisted THA may provide greater accuracy in component positioning vs. manual THA
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Key takeaways:
- Robotic-assisted hip arthroplasty had more frequent abductions and anteversions for patients with overweight.
- Patients with obesity had a perfect record for anteversions with robotic-assisted hip arthroplasty.
Published results showed robotic-assisted total hip arthroplasty may provide significantly greater accuracy in acetabular component positioning compared with manual THA in patients with overweight or obesity.
“This indicates that robotic-assisted technology may provide a more precise positioning of the acetabular component in overweight and obese patients,” Chaoquin Yu, of the department of joint surgery at The Affiliated Hospital of Qingdao University, Qingdao, Shandong Province in China, and colleagues wrote in the study.
Yu and colleagues categorized 221 patients who underwent THA with the Robotic Interactive Orthopaedic Arm (RIO) system (Mako Surgical Corporation) and 252 patients who underwent manual THA between March 2022 and January 2024 into groups based on BMI. The groups included patients with a BMI less than 18.5 kg/m2 (group A), BMI between 18.5 kg/m2 and 24 kg/m2 (group B), BMI between 24 kg/m2 and 28 kg/m2 (group C) and BMI of 28 kg/m2 or more. Researchers analyzed whether robotic-assisted THA and manual THA had differences in the accuracy of acetabular component positioning between BMI groups.
Results showed patients with overweight had a significantly higher rate of abductions within the target range with robotic-assisted THA vs. manual THA. Yu and colleagues also found robotic-assisted THA yielded significantly more frequent abductions and anteversions within the target range compared with manual THA.
Patients with obesity had a perfect record for anteversions within the target range with robotic-assisted THA, which markedly outperforming manual THA, according to researchers.
“[We] recommend that future studies consider [including] different surgical approaches and adopt more objective measurement techniques, such as three-dimensional CT scanning or automated image analysis software, to reduce human error and improve the accuracy and reliability of the measurements,” Yu and colleagues wrote. “Using these methods, the impact of different BMI categories on surgical outcomes can be assessed more accurately, thereby providing more precise guidance for clinical practice.”
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