Study: Smith+Nephew’s VISIONAIRE PSI vs. Conventional Instrumentation

Smith+Nephew announced a systemic literature review and meta-analysis of its VISIONAIRE Patient-Specific Instrumentation (PSI) showing that its use leads to improvements in alignment accuracy, efficiency in surgical procedures and reduction in length of hospital stay in comparison with conventional instrumentation.

Twenty-five relevant studies were included in the meta-analysis, all of which compared VISIONAIRE PSI-enabled Total Knee Arthroplasty (TKA) with conventional instrumentation-enabled TKA. Each study reported on one or more of the following outcome measures: alignment accuracy, intraoperative outcomes (indicative of efficiency) and postoperative outcomes.

The studies demonstrate that, compared to TKA carried out with conventional instrumentation, patients who received VISIONAIRE PSI-enabled TKA experienced the following statistically significant results:

• A 40% reduction in the odds of an outlier in the mechanical axis
• More efficient operations, with reductions in operating room time, turnover time and tourniquet time
• A 53% reduction in the odds of requiring a blood transfusion
• An 11.1% reduction in mean length of hospital stay

Accurate alignment (+/-3 degrees from neutral) has been shown to correlate with long term arthroplasty survivorship. This meta-analysis provides evidence of reduced odds of mechanical axis outliers versus conventional instrumentation.

Smith+Nephew’s VISIONAIRE Patient-Specific Instrumentation includes customized cutting guides designed to reduce the number of steps and surgical instruments required for surgery compared to conventional TKA, creating a simplified surgical environment with virtually no in-hospital incremental costs for payors, with post-acute cost savings due to a reduction in the likelihood of readmissions. The guides are designed from surgeon-specific preferences, then developed by a dedicated engineer, allowing for personalized performance.

Source: Smith+Nephew