Analysis of the application value of CTVE technique through nasal transsphenoidal nervous endoscopic surgery for pituitary ad-enoma

GE Xu-bo

Abstract：Objective To evaluate the application value of of CTVE technique through nasal transsphenoidal nervous en-doscopic surgery for pituitary adenoma .Methods In 20 patients with pituitary adenoma ,who underwent the routine nasal sphenoid surgery ,the conventional pituitary CT scan data were preoperatively reconstructed with CTVE ,which were ap-plied for the preoperative planning and intraoperative localization .The three-dimensional images on the saddle displayed by CTVE and intraoperative findings with microscope were analyzed .Results CTVE was able to display the anatomical structures of the saddle bottom via a three -dimensional image .The rates in displaying the anatomical structure of the sad-dle bottom in terms of sphenoid sinus septum ,sellar ,internal carotid artery bulge ,the optic canal swelling ,and OC crypts with CTVE were 320 .00% ,100 .00 % ,42 .50% ,40 .00% ,and 72 .50% ,respectively ,which were significantly higher than these displaying with microscope intraoperatively .Through the increase in the observation threshold ,CTVE could clearly show the dark side of the saddle at the end carotid artery ,pituitary tissue ,and the part of the optic canal .Two-di-mensional image with CTVE could be accurately indicated on the exact location of the tumor Conclusion CTVE can show the three-dimensional anatomical relationship of anatomic landmarks between the sphenoid and the bottom surface of sad-dle with deep surface structure .For the sphenoid sinus nasal surgery on pituitary adenoma ,CTVE can be a good guidance for preoperative planning and intraoperative localization.