Bài viết trình bày đánh giá các chỉ số giải phẫu căn bản của C1,C2 trên cắt lớp vi tính ở người Việt Nam phục vụ cho phẫu thuật chấn thương cột sống cổ cao qua lối sau. | ĐÁNH GIÁ CHỈ SỐ GIẢI PHẪU C1 C2 NGHIÊN CỨU KHOA HỌC TRÊN CẮT LỚP VI TÍNH PHỤC VỤ SCIENTIFIC RESEARCH PHẪU THUẬT CHẤN THƯƠNG CỘT SỐNG CỔ CAO A computed tomographic study of C1 C2 morphology for atlantoaxial screw fixation techniques Lê Viết Dũng Nguyễn Duy Hùng SUMMARY Purpose This study is aimed to define the ethnic differences in the radiological measurements on C1 and C2 in Vietnamese population in order to determine the feasibility of implement C1-2 fixation techniques. Study design Retrospective study. Methods From October 2017 to April 2018 120 thin-slide 1 to 3 mm computed tomography scans of the cervical spine were reviewed. Various dimensions of C1 and C2 were analyzed on axial sagittal reconstructed CT images. The differences between the right and left sides and between males and females were statistically analyzed using t-test with a p-value of lt considered significant. Results Mean anteroposterior dimension and transverse width of C1 lateral mass were mm and mm respectively. Mean angle of the screw directed to maximal medial lateral cranial and caudal were and respectively. Average isthmus height internal height and pedicle width of C2 were mm mm and mm. No significant differences between the right and the left side of C1 C2 parameters and between sex variations. The prevalence of high-riding vertebral artery was and narrow pedicle was . Conclusions this study shows that the morphology of C1 and C2 is variable between Vietnamese and other populations. Due to several cases may not be relevant for C1-2 fixation techniques preoperative anatomy evaluation based on CT data need to be performed for screw placement and trajectory planning. Key word atlanto-axial trauma C1 lateral mass dimension high-riding verebral artery C2 narrow pedicle. Khoa Chẩn đoán hình ảnh Bệnh viện Hữu nghị Việt Đức Bộ môn Chẩn đoán hình ảnh Trường ĐH Y Hà Nội ÑIEÄN QUANG VIEÄT NAM Số 34
