Table 2. Surgeon UKA vs TKA Volumes Before and After Introduction of Robotic Arm–Assisted Technology.
| Years of Experience | 18 Months Before Introduction (7/1/2016-12/31/2017) | 18 Months After Introduction (4/1/2018-9/30/2019) | ||||||
|---|---|---|---|---|---|---|---|---|
| mUKA | mTKA | mUKA | mTKA | rUKA | rTKA | % Increase | ||
| Surgeon A | 17 | 13 | 106 | 2 | 42 | 26 | 77 | — |
| Surgeon B | 25 | 9 | 188 | 0 | 143 | 16 | 99 | |
| Surgeon C | 6 | 16 | 200 | 1 | 124 | 52 | 62 | |
| Surgeon D | 23 | 0 | 63 | 0 | 95 | 13 | 9 | |
| Total UKA volume | 38 | — | 3 | — | 107 | — | 189.50 | |
| Total TKA volume | — | 557 | — | 404 | — | 247 | 16.90 | |
| Total KA volume | 595 | 761 | 27.90 | |||||
| TKA-UKA ratio | 557:38 (15:1) | 651:110 (6:1) | ||||||
Abbreviations: KA, knee arthroplasty; mTKA, manual total knee arthroplasty; manual unicompartmental knee arthroplasty; rTKA, robotic arm–assisted total knee arthroplasty; rUKA, robotic arm–assisted unicompartmental knee arthroplasty; TKA, total knee arthroplasty; UKA, unicompartmental knee arthroplasty.