Execution:
- Patient is in supine lying position with the hip abducted and flexed to 30° by the examiner
- The examiner then grabs the patient’s heel from the inside with one hand, and brings the tibia into internal rotation while adding axial compression
- With the other hand, the examiner applies a valgus force at the knee joint, which together with point 2 subluxes the tibia in extension in case of a torn ACL
Positive Outcome: A clunk sound is heard at around 30° of flexion when the tibia is reduced on the femur due to the tightening of the iliotibial band or the patient is experiencing apprehension or the feeling of giving way that they know from walking
| Study |
Reliability |
Sn | Sp | LR+ |
LR- |
| Benjaminse et al. (2006) |
NA |
24 | 98 | 12 | 0.78 |
| Van Eck et al. (2013) |
NA |
28 | 81 | 5.35 | 0.84 |
| Huang et al. (2016) |
NA |
49 | 97.5 | 16 | 0.17 |
| Peeler et al. (2010) | Inter-rater ĸ=0.32-0.82 | NA | NA | NA | NA |
| Zhao et al. (2021) | NA | 61.5 | 97.2 | 21.96 | 0.4 |
| Huang et al. (2022) | NA | 59 (56-62) | 97 (95-98) | 13.99 (9.96-19.64) | 0.44 (0.35-0.55) |
| Tanaka et al. (2022) | NA | 55 (49-60) | 96 (91-98) | 11.6 (5.31-25.33) | 0.49 (0.33-0.72) |
| Sokal et al. (2022) | NA | 55 (47-62) |
94 (88-97) |
10.7 (5.43-19.3) |
0.48 (0.4-0.56) |
