Table 5.
Hand sensation
|
Sensory test
|
Median
|
Ulnar
|
||
|---|---|---|---|---|
| Open surgery | Endoscopic surgery | Open surgery | Endoscopic surgery | |
| Semmes-Weinstein monofilament, mean (SD)* | ||||
| Baseline | 2.0 (0.7) | 2.1 (0.7) | 1.5 (0.6) | 1.5 (0.7) |
| 3 weeks | 1.5 (0.6) | 1.6 (0.7) | 1.3 (0.5) | 1.3 (0.5) |
| 6 weeks | 1.4 (0.6) | 1.6 (0.6) | 1.2 (0.4) | 1.2 (0.4) |
| 3 months | 1.5 (0.6) | 1.6 (0.7) | 1.2 (0.5) | 1.3 (0.6) |
| Two point discrimination, mean (SD)* | ||||
| Baseline | 4.5 (0.9) | 4.7 (1.1) | 4.3 (0.6) | 4.5 (0.8) |
| 3 weeks | 4.1 (0.3) | 4.3 (0.6) | 4.2 (0.4) | 4.3 (0.5) |
| 6 weeks | 4.1 (0.3) | 4.3 (0.5) | 4.2 (0.3) | 4.3 (0.6) |
| 3 months | 4.1 (0.4) | 4.2 (0.5) | 4.1 (0.4) | 4.2 (0.4) |
| Two point discrimination, No (%)† | ||||
| Baseline: | ||||
| 4 mm | 38 (60.3) | 35 (55.6) | 47 (74.6) | 43 (68.2) |
| 6 mm | 18 (28.6) | 20 (31.7) | 15 (23.8) | 17 (27) |
| ≥8 mm | 7 (11.1) | 8 (12.7) | 1 (1.6) | 3 (4.8) |
| 3 weeks: | ||||
| 4 mm | 50 (78.1) | 49 (77.8) | 54 (84.4) | 47 (74.6) |
| 6 mm | 14 (21.9) | 12 (19) | 10 (15.6) | 16 (25.4) |
| ≥8 mm | 0 (0) | 2 (3.2) | 0 (0) | 0 (0) |
| 6 weeks: | ||||
| 4 mm | 54 (85.7) | 45 (71.4) | 51 (81) | 51 (81) |
| 6 mm | 9 (14.3) | 18 (28.6) | 12 (19) | 12 (19) |
| ≥8 mm | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| 3 months: | ||||
| 4 mm | 51 (84.1) | 51 (80.9) | 54 (85.7) | 55 (87.3) |
| 6 mm | 10 (15.9) | 11 (17.5) | 9 (14.3) | 8 (12.7) |
| ≥8 mm | 0 (0) | 1 (1.6) | 0 (0) | 0 (0) |
*
Mean (SD) for the three and half radial fingers or one and half ulnar fingers, innervated by median and ulnar nerve, respectively.
†
No (%) of patients with two point discrimination value of 4 mm in all median or ulnar nerve innervated fingers or 6 mm or ≥8 mm in at least one of the fingers.