Table 3.
Grade | Radiocarpal Joint | Midcarpal view | Carpal bone gap |
---|---|---|---|
1 | Attenuation/Hemorrhage of interosseous ligament | No incongruence/step off | None |
2 | Attenuation/Hemorrhage of interosseous ligament | Incongruence/step off of the carpal alignment | Less than the width of the probe |
3 | Incongruence/step off of the carpal alignment | Incongruence/step off of the carpal alignment | Probe passes between the carpal bones |
4 | Incongruence/step off of the carpal alignment | Incongruence/step off of the carpal alignment | 2.7 mm arthroscope passes between the carpal bone |