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Table 4 Results (median and range) for different stimulus numbers

From: Optimal stimulation settings for CMAP scan registrations

Variable

300

500

1000

 

(n = 12)

(n = 12)

(n = 12)

Max CMAP (mV)

11.7

(6.5–13.8)

11.6

(6.5–14.4)

11.4

(6.6–14.2)

S5 (mA)

9.6

(8.4–22.9)

10.0

(7.8–22.1)

9.9

(7.8–23.3)

S50 (mA)

11.9

(10.0–28.8)

12.4

(9.6–27.1)

12.2

(10.1–29.6)

S95 (mA)

16.3

(11.0–35.1)

17.2

(11.2–33.6)

16.8

(11.3–35.8)

Range (mA)

5.8

(2.3–12.15)

6.2

(2.8–11.5)

6.4

(2.8–12.5)

Relative Range

0.59

(0.27–0.95)

0.61

(0.34–0.99)

0.62

(0.33–0.89)

Step Number

1.5

(0–7)

0.5

(0–5)

0.0

(0–3)

Step percentage (% )

3.9

(0.0–16.5)

0.3*

(0.0–10.9)

0.0*

(0.0–10.9)

  1. The ulnar nerve was stimulated in 6 patients and in the other 6 patients the median nerve was stimulated. Significant (p < 0.01) differences with a stimulus number of 300 are indicated with an *. Other differences between the different stimulus numbers were not significant.