Table 1. Leads Assessment of Neuropathic Symptoms and Signs Scale.
| A. Pain questionnaire |
| 1) Does your pain feel like strange, unpleasant sensations in your skin? Words like pricking, tingling, pins and needles might describe these sensations. |
| No: my pain doesn't really feel like this (0) |
| Yes: I get these sensations quite a lot (5) |
| 2) Does your pain make the skin in the painful area look different from normal? Words like mottled or looking more red or pink might describe the appearance. |
| No: my pain doesn't affect the color of my skin (0) |
| Yes: I've noticed that the pain does make my skin look different (5) |
| 3) Does your pain make the affected skin abnormally sensitive to touch? Getting unpleasant sensations when lightly stroking the skin, or getting pain when wearing tight clothes might describe the abnormal sensitivity. |
| No: my pain doesn't make my skin abnormally sensitive in that area (0) |
| Yes: my skin seems abnormally sensitive to touch in that area (3) |
| 4) Does your pain come on suddenly and in bursts for no apparent reason when you're still? Words like electric shocks, jumping and bursting describe these sensations. |
| No: my pain doesn't really feel like this (0) |
| Yes: I get these sensations quite a lot (2) |
| 5) Does your pain feel as if the skin temperature in the painful area has changed abnormally? Words like hot and bursting describe these sensations. |
| No: I don't really get these sensations (0) |
| Yes: I get these sensations quite a lot (1) |
| B. Sensory test |
| 1) Allodynia |
| Examine the response to lightly stroking cotton wool across the non-painful area and then the painful area. If normal sensations are experienced in the non-painful site, but pain or unpleasant sensations (tingling, nausea) are experienced in the painful area when stroking, allodynia in present. |
| No: normal sensation in both area (0) |
| Yes: allodynia in painful area only (5) |
| 2) Altered pin-prick threshold (PPT) |
| Determine the pin-prick threshold by comparing the response to 23 gauge (blue) needle mounted inside a 2 mL syringe barrel paced gently on to skin in a non-painful and then painful areas. If a sharp pin prick is felt in the non-painful area, but a different sensation is experienced in the painful area e.g. none/blunt only (raised PPT) or a very painful sensation (lowered PPT), an altered PPT is present. If a pinprick is not felt in either area, mount the syringe onto the needle to increase the weight and repeat. |
| No: equal sensation in both areas (0) |
| Yes: altered PPT in painful area (3) |
Scoring: add values in parentheses for sensory description and examination findings to obtain overall score. Total score (maximum 24). If score<12, neuropathic mechanisms are unlikely to be contribution to the patient's pain. If score≥12, neuropathic mechanisms are likely to be contributing to the patient's pain.