CT Study Of V2 Vertebral Artery And Its Correlation With Transverseforamen Under Cervical Rotation Posture

Objective: The purpose is to explore and discuss the change of vertebral artery lumen area of V2 segment and its correlation with transverse foramen under cervical rotation posture,which provides certain imaging basis for clinical diagnosis of Cervical Spondylotic Arteriopathy(CSA).At the same time,it also provides certain theoretical basis for subsequent treatment.Methods: From January 2015 to December 2017,fifty-two cases of CSA diagnosed in the outpatient department and inpatient department of Maanshan Municipal People's Hospital were selected.Three-dimensional CT angiography(CTA)was used to scan the cervical neutral position,left-hand forty-five degree position and right-hand forty-five degree position to observe the shape of vertebral artery lumen.And the changes of vertebral artery V2 atlantoaxial segment lumen area and its correlation with transverse foramen were studied.The vertebral artery area,transverse foramen area,distance between vertebral artery outer edge and transverse foramen outer edge,distance between vertebral artery inner edge and transverse foramen inner edge and ratio of vertebral artery area to transverse foramen area were recorded.SPSS 18.0 software was used to carry out statistical analysis on the measured data.The measured indexes met the normal distribution.And they were expressed by average value plus or minus standard deviation(x±s).The left and right parameters were compared by independent sample T test.And the difference was statistically significant(P was less than zero point zero five).Results: The results of this study showed that when the neck was left-hand forty-five degree,the distance between the left atlantoaxial segment vertebral artery inner edge and the transverse foramen inner edge and the distance between the right atlantoaxial segment vertebral artery outer edge and the transverse foramen outer edge were significantly smaller than those in the neutral position of neck.And the ratio of the left and right vertebral artery areas to the transverse foramen area was smaller than that in the neutral position of neck.When the neck was right-hand forty-five degree,the distance between the outer edge of the vertebral artery of the left atlantoaxial segment and the outer edge of the transverse foramen and the distance between the inner edge of the vertebral artery of the right atlantoaxial segment and the inner edge of the transverse foramen were significantly smaller than those of in the neutral position of neck.And the ratio of the area of the vertebral artery of the left and the right to the area of the transverse foramen was smaller than that in the neutral position of neck.Above differences had statistical significance(P<0.05).Conclusion: By exploring the influence of the forty-five degree rotation of the neck on the vertebral artery morphology and the correlation between the vertebral artery of atlantoaxial segment and the transverse foramen,a number of imaging evidences can be provided for the clinical diagnosis of CSA.Comprehensive and systematic three-dimensional image reconstruction technology can locate the stenosis level,clarify the specific reasons of vertebral artery compression and provide certain evidence basis for clinical intervention.