The purpose of this study was to quantify accuracy of a recently FDA-approved robotic-assisted device. Thirty-seven patients underwent TKA with the Robotic Surgical Assistant (ROSA) by the same operating surgeon and team over the course of 3 months. Intra-operative mechanical axis measurements, composed of alpha (α), beta (β), gamma (γ), and delta (δ) angles, and the hip-knee-ankle angle (HKA) were calculated by the ROSA. Post-operative mechanical implant angles were taken from 36″ stitched post-op films and measured in the PACS imaging system. Accuracy was assessed by comparing the percentage of postoperative long length films within 2° and 3° of the ROSA intra-operative plan. The ROSA system accurately calculated the HKA, α, and β angles (95% CI), but was inaccurate in calculating both γ and δ angles. Using a window of ± 3° accuracy, the HKA, α and β angles were accurate at levels of 89, 100 and 92% respectively. In contrast, the sagittal relationships were considerably less accurate at 77 and 74% for the γ and δ angles respectively. Subsequently, the proportion of cases within 2 and 3 degrees of the intra-operative plan for resection angles was considered accurate for HKA (73% within 2°, 89% within 3°), α (92% within 2°, 100% within 3°), and β (76% within 2°, 92% within 3°) angles, but considered inaccurate for γ (51% within 2°, 77% within 3°) and δ angles (57% within 2°, 74% within 3°). This study demonstrated that while the ROSA system seems to accurately predict coronal plane resections in TKA, it falls short in the sagittal plane. Further research in these deficiencies can provide insight into the overall efficacy of robotic assisted surgery in TKA. Level III Therapeutic Study.

中文翻译：

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近期机器人辅助系统 ROSA 用于全膝关节置换术的准确性不理想

本研究的目的是量化最近 FDA 批准的机器人辅助设备的准确性。在 3 个月的时间里，37 名患者由同一手术外科医生和团队在机器人手术助手 (ROSA) 下接受了 TKA。ROSA计算了由α（α）、β（β）、γ（γ）和δ（δ）角组成的术中机械轴测量值，以及髋-膝-踝角（HKA）。术后机械植入角度取自 36 英寸缝合的术后胶片，并在 PACS 成像系统中测量。通过比较 ROSA 术中计划的 2° 和 3° 范围内的术后长片百分比来评估准确性。ROSA 系统准确计算了 HKA、α 和 β 角 (95% CI)，但计算 γ 和 δ 角都不准确。使用 ± 3° 精度的窗口，HKA，α 和 β 角的准确率分别为 89%、100% 和 92%。相比之下，对于 γ 和 δ 角，矢状关系的准确度分别为 77% 和 74%。随后，对于HKA（2°内73%、3°内89%）、α（2°内92%、100%内），认为切除角术中计划2度和3度以内的病例比例是准确的。 3°）和 β（2° 内 76%，3° 内 92%）角，但 γ（2° 内 51%，3° 内 77%）和 δ 角（2° 内 57%，74 % 在 3° 以内）。这项研究表明，虽然 ROSA 系统似乎可以准确预测 TKA 中的冠状面切除，但在矢状面上却不足。对这些缺陷的进一步研究可以深入了解机器人辅助手术在 TKA 中的整体疗效。III级治疗研究。