Table 6 NCS findings in ulnar neuropathy at elbow
Parameters | Etiology | Abnormal |
|---|---|---|
Ulnar motor nerve conduction velocity across elbow < 50 m/s | T | 16 (66.67%) |
NT | 120 (82.75%) | |
motor conduction velocity difference between forearm and elbow segment > 11 m/s | T | 15 (62.5%) |
NT | 98 (67.58) | |
CMAP amplitude > 50% drop across elbow | T | 13 (54.16%) |
NT | 80 (55.17%) | |
CMAP amplitude > 20% drop across elbow at 10 cm difference | T | 10 (41.67%) |
NT | 80 (55.17) | |
Inching technique: > 10% CMAP amplitude drop and/or abrupt shift in latency by 8 cm on Short-segment (2 cm) stimulations | T | 6 (24%) |
NT | 50 (34.48%) | |
SNCV below 50 m/s across elbow | T | 14 (58.33%) |
NT | 100 (68.96%) | |
reduction in SNAP base-to-peak amplitude by 43% or > 8 µV | T | 4 (16.7%) |
NT | 70 (48.27%) | |
Abnormal Dorsal ulnar cutaneous nerve (DUCN) SNAP and conduction velocity | T | 3 (12.5%) |
NT | 60 (41.37%) |