Applied Anatomy on the Various Operative Approach of Lateral Ventricle in Endoscopic Transoccippital Surgery

Objective To study the optimal location for endoscopic transoccipital horn lateral ventricular surgery in trigone,central part and angulus inferior simultaneously.Methods The structures of occipital horn of lateral ventricle of 10(20 sides)adult cadaveric head specimens were observed and measured by simulating endoscopic surgery.The pricks were located 30 mm lateral from the the brain middle,30 mm,40 mm,50 mm,60 mm,70 mm,80 mm supra from the external occipital protuberance and were designated Z1,Z2,Z3,Z4,Z5 and Z6 respectively.Results(1)The pathway to the center of trigone was denominated the base line,and the max included angle formed from trigone to central part were Z5 and Z6 (P0.05),while the max included angle formed from trigone to angulus inferior were Z1 and Z2(P0.05);(2)The brain tissue thickness from Z1～Z6 to the trigone,the central part and the angulus inferior (A,B,C)was not significantly different (P0.05),and the three pathways was compared BCA;(3)By observing the position relationship between the occipital horn and pricks, Z4,Z5 and Z6 were easy to reach the anterior horn,while Z2,Z3 and Z4 were easy to reach the inferior horn. Conclusion The optimal prick for endoscopic transoccipital surgery in the trigone,the central part and the angulus inferior is Z4.