Execution
- 1Position the patient supine and relaxed.
- 2Raise the uninvolved or less symptomatic leg with the knee extended.
- 3Keep the tested hip in neutral rotation and adduction during the lift.
- 4Stop when the patient reports symptoms or when maximal available hip flexion is reached.
- 5Record whether symptoms are reproduced in the opposite symptomatic limb.
Positive outcome
Reproduction of the patient’s symptoms in the opposite symptomatic leg while raising the uninvolved leg is positive. Magee states that this finding suggests a space-occupying lesion such as a large central or medial disc protrusion and is a poorer prognostic sign for conservative care. Bowel and bladder symptoms must be questioned carefully if this sign is positive.
Studies
| Study | Reliability | Sn | Sp | LR+ | LR− |
|---|---|---|---|---|---|
| Devillé et al. (2000) | NA | 29 | 88 | 2.42 | 0.81 |
| Vroomen et al. (1999) | NA | 30 | 84 | 1.88 | 0.83 |
CommentCrossed SLR is much less sensitive than ipsilateral SLR but is more specific for disc herniation or nerve-root compromise. Magee treats it as a serious finding because it may imply a larger central or medial lesion. A negative crossed SLR does not exclude radicular syndrome.
Moderate Clinical Value