Table 1.
Nerve conduction study during the initial presentation in 2002 (1st episode) and recurrence (2nd episode) of Guillain-Barre syndrome in 2014
| Nerve | Episode | Distal latency (ms) | Conduction velocity (m/s) | Amplitude (mV) | F wave (m/s) | Conduction block |
|---|---|---|---|---|---|---|
| Motor | ||||||
| Median (Right/left) | 1st | 6.7/6.2 | 40/45 | 7.5/11 | 33/35 | Yes |
| 2nd | 9.1/8.9 | 38/40 | 5.6/ 6 | 38/40 | Yes | |
| Recovery (4 months after 2nd Episode) | 4.4/4.5 | 51 | 6.0 | 29 | No | |
| Normal Referrence Value | <4.4 | >49 | >4.2 | <31 | ||
| Ulnar (Right/left) | 1st | 4.6/5.0 | 42/44 | 6.0/ 6.2 | 27/32 | Yes |
| 2nd | 8.9/9.4 | 37/41 | 8.2/ 1.5 | 36/29 | Yes | |
| Normal Referrence Value | <3.5 | >49 | >5.6 | <31 | ||
| Peroneal @ EDB (Right/left) | 1st | 11.5/13 | 38/45 | 2.5/ 2.4 | 43/49 | NP |
| 2nd | Absent | Absent | 1.6/2.0 | Absent | Yes | |
| Recovery (4 months after 2nd Episode) | 5.5 | 50 | 2.5 | 33 | No | |
| Normal Referrence Value | <5.7 | >50 | >2.2 | |||
| Tibial (Right/left) | 1st | 18.8/18.9 | 3.0/3.2 | 52/49 | NP | |
| 2nd | NP | NP | NP | NP | NP | |
| Normal Referrence Value | >2.8 | |||||
| Sensory | ||||||
| Radial (Right/left) | 1st | 2.8/ 3.1 | 38/37 | 24/23 | - | - |
| 2nd | 2.9/ 3.0 | 28/33 | 18/20 | |||
| Normal Referrence Value | <2.6 | >43 | >20 | |||
| Sural (Right/left) | 1st | 2.5/3.0 | 41/40 | 34/28 | ||
| 2nd | 2.6/2.5 | 46/48 | 25/27 | - | - | |
| Normal Referrence Value | <2.6 | >52 | >24 | |||
NP not performed
EDB Extensor digitorum brevis