Volumetric comparative analysis of anatomy through far-lateral approach: surgical space and exposed tissues

Table 1 Volumetric comparison of surgical anatomy

Item	Corridor 1 (mm³)		Corridor 2 (mm³)		p value
Item	Mean	SD	Mean	SD
Operative space	5501.60	150.03	11430.00	1085.88	< 0.001
Bony drilling	1745.50	112.54	2763.50	145.15	< 0.001
Extra-cranial VA	64.05	1.34	95.53	1.08	< 0.001
BA^a	28.90	1.84	37.86	1.41	< 0.001
Venous structures	72.36	1.63	205.69	14.10	< 0.001
CN X^b	—	—	5.50	0.20	—
CN XI	9.61	0.40	15.38	1.21	< 0.001
CN XII	11.20	1.07	13.55	1.23	< 0.001

Comparison of the volumes (mm³) measured in corridors 1 and 2 (30 sides). p values < 0.05 indicate statistical significance. BA, basilar artery; CN X, vagus nerve; CN XI, accessory nerve; CN XII, hypoglossal nerve; VA, vertebral artery
^aBA was involved in 16 sides of 3D model
^bOnly corridor 2 involved CN X. Thus, the pair t test was not performed

ISSN: 2057-4967