Observation and measurement of applied anatomical features for thoracic intervertebral foramen puncture on computed tomography images

Table 3 Parameters related to the upper 1/3 level of the intervertebral foramen for puncture

Segment	Wp/Wv > 1	Wp/Wv ≤ 1	Puncture angle (left)	Puncture angle (right)	P value
T1-2 (n = 6)	6 (100%)	0	42.73 ± 2.73	48.95 ± 2.20	0.151
T2-3 (n = 17)	17 (100%)	0	62.55 ± 8.51	61.76 ± 6.71	0.484
T3-4 (n = 23)	23 (100%)	0	69.02 ± 5.76	69.68 ± 6.09	0.705
T4-5 (n = 23)	23 (100%)	0	71.76 ± 4.89	71.93 ± 6.67	0.925
T5-6 (n = 14)	14 (100%)	0	71.10 ± 6.13	70.88 ± 7.00	0.709
T6-7 (n = 16)	16 (100%)	0	73.78 ± 3.39	73.68 ± 4.53	0.944
T7-8 (n = 12)	12 (100%)	0	76.96 ± 4.96	75.91 ± 4.22	0.581
T8-9 (n = 16)	16 (100%)	0	79.26 ± 5.25	79.74 ± 5.65	0.805
T9-10 (n = 16)	16 (100%)	0	76.65 ± 4.98	77.12 ± 5.72	0.808
T10-11 (n = 10)	7 (70%)	3 (30%)	83.29 ± 6.92	82.98 ± 6.53	0.918
T11-12 (n = 8)	0	8 (100%)	90 ± 0	90 ± 0	-
T12-L1 (n = 6)	0	6 (100%)	90 ± 0	90 ± 0	-

P value: Comparison of puncture angle between the right and left. W_P: The width of the lateral border of the articular process/lamina; W_V: The width of the posterior border of the vertebral body.