Table 2

Serial nerve conduction studies

Patient12345678
Day of study740727133633873728466238851532113561835
Sensory studies
 Median SNAP (μV)444941262526323327272635304545213035263432664550
 Ulnar SNAP (μV)324030332129322827262328223142393931243332473740
 Sural SNAP (μV)131417121410262421181517232120161515302220271517
Motor studies
 Median DML (ms)3.83.93.73.63.53.53.63.93.73.64.13.94.14.14.14.63.63.93.83.93.93.23.13.3
  CMAP (mV)8.28.98.69.09.29.510.511.59.97.58.17.710.210.210.19.38.59.48.98.68.513.710.711.7
  CV (m/s)535255575655515353565657555959535154535354625960
 Ulnar DML (ms)3.03.12.92.92.82.82.93.12.82.63.03.12.52.52.53.22.82.62.53.02.72.52.72.9
  CMAP (mV)9.011.09.811.410.912.711.411.110.911.411.012.510.410.310.113.412.213.79.611.110.511.411.611.8
  CV (m/s)565058565958585559565150615858535757595658586066
Patient9101112131415
Day of study71530605164951825856143076714481932844
Sensory studies
 Median SNAP (μV)151111191625291823243921132434NA24613232727273
 Ulnar SNAP (μV)129141217222610151721Ab112033NA9632925666268
 Sural SNAP (μV)161411121015141410101622161926NA23231518243336
Motor studies
 Median DML (ms)3.93.84.03.84.23.93.93.53.23.03.43.23.44.23.72.92.73.73.83.93.43.73.9
  CMAP (mV)8.78.18.07.48.511.58.09.69.510.610.25.310.010.09.27.76.57.97.57.99.79.911.4
  CV (m/s)5554515352525854525453545853566152585452545756
 Ulnar DML (ms)2.42.72.92.72.92.93.02.62.52.42.83.02.93.03.02.52.03.02.83.02.42.52.7
  CMAP (mV)9.911.112.811.27.910.59.210.111.711.612.13.810.09.611.04.21.89.46.69.29.59.59.6
  CV (m/s)5958556051555758626058575552545558586263655158
  • The abnormal values, as defined in methods, are indicated in bold. Significant serial changes are underscored.

  • Ab, absent; CMAP, compound muscle action potentials; CV, conduction velocity; DML, distal motor latency; NA, not applicable because of ICU artifacts; SNAP, sensory nerve action potential.