Table 1.

Measured and calculated parameters for the location of proposed injection sites for distal limb nerves

	Mean	Maximum	Minimum	Median	SD	CC
Superficial branches of radial nerve
(A) Distance from the lateral aspect of the limb (mm)	13.0	14.7	9.3	13.6	1.38	0.69*
(B) Width of the limb at the level of injection point (mm)	15.7	17.8	12.8	16.0	1.47	0.65*
(C) Distance proximally from the accessory carpal bone (mm)	17.8	20.9	14.1	18.2	1.62	0.71*
(D) Distance from the accessory carpal bone to lateral epicondyle of the humerus (cm)	9.6	11.1	8.4	9.7	0.91	0.91*
(E) Width% (the ratio of A/B expressed as %)	82.5	87.5	72.7	83.3	4.23	0.29
(F) Length% (the ratio of C/D expressed as %)	18.5	21.1	16.2	18.7	1.32	−0.34
Dorsal branch of ulnar nerve
(G) Distance from the accessory carpal bone (mm)	4.0	4.6	3.0	4.0	0.42	−0.12
(H) Width of the carpus at the level of accessory carpal bone (mm)	17.4	20.2	14.5	17.2	1.63	0.76*
(I) Width% (the ratio of G/H expressed as a %)	23.2	30.0	18.1	23.1	3.15	−0.55*
Median nerve
(J) Distance from lateral aspect of the limb (mm)	11.5	14.2	9.8	11.2	1.14	0.04
(K) Width of the limb at the level of injection point (mm)	17.6	19.2	15.2	17.6	1.24	0.68*
(L) Proximodistal distance from the accessory carpal bone (mm)	11.5	13.5	10.0	11.5	0.90	0.55*
(M) Width% (the ratio of J/K expressed as a %)	65.5	74.6	55.7	65.3	5.59	−0.54*
Superficial and deep branch of palmar branch of ulnar nerve
(N) Distance from the lateral aspect of the limb (mm)	6.8	9.5	5.5	6.4	1.19	−0.10
(O) Distance from the median nerve (mm)	4.8	5.1	4.3	4.8	0.27	0.39
(P) Width% (the ratio of N/K expressed as %)	38.4	50.8	29.7	36.3	5.89	−0.43
(Q) Distance from the accessory carpal bone (mm)	11.5	12.5	10.3	11.6	0.59	0.56*

^*Significant correlation to body weight (P <0.05)

CC = correlation coefficient