Table 3.
Results of sensory nerve conduction studies in patients with Guillain-Barre syndromea
| Nerve |
Normal
control |
Early
a
, < 2 weeks
|
Late
a
, ≥ 2 weeks
|
||||
|---|---|---|---|---|---|---|---|
| AIDP, n = 15 | AMAN, n = 8 | AMSAN, n = 2 | AIDP, n = 29 | AMAN, n = 8 | AMSAN, n = 8 | ||
| Median | |||||||
| Amplitude (µV) | ≥ 20 | 10.1 (0-86) | 48.8 (0-74) | 41.2 (21.4-61) | 0 (0-81) | 45.3 (6.5-70.8) | 9.6 (0-43) |
| NCV (ms) | ≥ 50 | 43.2 (NA-67) | 53 (NA-62.2) | 59.5 (54-56) | NA (NA-63) | 55.8 (28.0-62.8) | 54.6(NA-66) |
| Ulnar | |||||||
| Amplitude (µV) | ≥ 17 | 10.2 (0-50) | 36 (16-54) | 33 (23.2-42.8) | 0 (0-58) | 36.5 (20-72.4) | 6.5 (0-41) |
| NCV (ms) | ≥ 50 | 49 (NA-67) | 62 (48.6-63) | 62.9 (53-72.8) | NA (NA-68) | 52.9 (50-58) | 49.4 (NA–65) |
| Sural | |||||||
| Amplitude (µV) | ≥ 6 | 2.8 (0-16.0) | 12.0 (3.2-32.0) | 0 | 5.5 (0-21.6) | 13.7 (8.7-22.0) | 0 (0-13.9) |
| NCV (ms) | ≥ 40 | 39 (NA-55) | 44 (39-59.4) | NA | 38 (NA-61.6) | 46 (35.7-49.3) | NA (NA-63) |
AMAN: Acute motor axonal polyneuropathy; AMSAN: Acute motor sensory axonal polyneuropathy; NCV: Nerve conduction velocity
NA: Not applicable
a
Data are presented in median (range). AIDP: Acute inflammatory demyelinating polyneuropathy