MRV Anatomical Study Of The Lateral Sinus Region And Its Adjacent Veins

Background:The dural sinus is a blood-containing cavity between the inner and outer layers of the dura mater,which is the place where the cortical veins drain.The lateral sinus area includes transverse sinus and sigmoid sinus,while the sinus confluence,tentorial sinus,superior petrosal sinus and inferior petrosal sinus are adjacent to and closely related to the lateral sinus area.Most of the previous studies were based on autopsy or venous angiography.There are few reports on the use of non-invasive venous magnetic resonance imaging(MRV)on this issue.Therefore,we used head MRV to study the structure of the lateral sinus and its adjacent veins.Objective:The venous structure of the lateral sinus region in healthy adults of Han nationality was retrospectively studied by head MRV images,which provided a reference for the diagnosis and treatment of intracranial venous system diseases and the approach of neurosurgery in the future.Methods:The original MRV image was post-processed by GE workstation to reconstruct the MRV image of the lateral sinus area and its adjacent venous structure.Measure some anatomical parameters of the venous structure in this area,including length,diameter,angle and the development of venous sinus,and conduct statistical evaluation.Results:In our study,51% of the transverse sinus and sigmoid sinus were dominant on the right side.The length of the left transverse sinus was 78.3 ± 10.2 mm,and the right side was 72.9 ± 9.2 mm.The diameter of the left transverse sinus was 6.4 ± 2.8 mm at the beginning and 7.9 ± 2.1 mm at the right.The diameter of the junction of the left transverse and sigmoid sinuses was 5.9 ± 1.9 mm,and that of the right was 7.3 ± 1.9 mm.The diameter of the left Labbe vein was 3.0± 0.9 mm,and the right was 3.1 ± 0.9 mm.The unpaired t test showed that the length of bilateral transverse sinuses and the diameter of bilateral transverse sinuses and sigmoid sinuses were different(P<0.05).The paired t-test showed the difference in diameter between the beginning and the end of the inferior petrosal sinus(P<0.05),and Fisher’s exact test showed that there was a difference in the position of the bilateral lateral tentorial sinus(P<0.01).The unpaired t-test showed that there was a difference in the diameter of the left and right transverse sinuses in the group with poor occipital sinus development(P<0.05),while there was no difference in the diameter of the left and right transverse sinuses in the group with good occipital sinus development(P>0.05).Conclusions:This study provides some important parameters of the venous structure related to the lateral sinus region of adult Han healthy people.Through this study,we found that the transverse sinus,sigmoid sinus and inferior petrosal sinus were mostly dominant on the right side;The continuity of the inferior petrosal sinus has nothing to do with the side and the development of the bilateral transverse sinuses and sigmoid sinuses;The diameter of the cavernous sinus side of the inferior petrosal sinus was larger than that of the jugular bulb side;The right lateral tentorial sinus is closer to the sinus confluence than the left.When the occipital sinus is well developed to participate in venous shunt,it will change the right advantage of the transverse sinus and reduce the probability of fenestration in the sinus confluence area.