Table 3.
Differences in compartment pressure between conventional and robot-assisted TKA.
| Surgical technique | Mean difference in compartment pressure (lbs)a |
Percentage of unbalanced kneesb |
Percentage of overstuffed compartmentsc |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Extension | Mid-flexion | Flexion | Extension | Mid-flexion | Flexion | Extension | Mid-flexion | Flexion | |
| Conventional TKA (n = 49) | 15.1 ± 15.3 | 15.9 ± 16.2 | 13.4 ± 15.6 | 35% | 35% | 24% | 20% | 18% | 18% |
| Robotic TKA (n = 37) | 14.2 ± 8.9 | 15.1 ± 15.2 | 10.3 ± 6.4 | 27% | 24% | 5%d | 24% | 19% | 3%d |
Values are given as mean ± standard deviation or percentile.
a
Absolute value of lateral minus medial side compartment pressure.
b
>20 lbs absolute value difference between medial and lateral side.
c
>40 lbs of compartment pressure on medial or lateral side.
d
P value < .05 compared with conventional TKA.