| Object:To observe the anatomical features and to explore effect on Controlling intracranial venous blood by gross and endoscopic anatomy on bridging veins, in order to provide a morphologic basis for mechanism of bridging vein in Intracranial pressure regulator.Methods: Four cadaeric head sepcimens of clavaria moved (8sides) were used in cross anatomy, the number and the line feed of bridging veins were recoded after poured into blue galatin and red latex. blood clot depositing brain vein for. Six cadaeric head sepcimens of clavaria moved were washed along hemodynamic direction. Endoscopcs were inserted in the lumen of the superior sagittal sinus to observe the opening shape, valve, fiber cable, and the arachnoid membrane particles ridge in outflow segment 0f the cerebral bridging veins.Resuts:1 Results of gross and anatomy on bridging veins into the superior sagittal sinus:There are 8 to15 superficial veins on back lateral each side of the brain hemisphere, including 3-4 veins on the forehead,6-9 on frontal and parietal and 3-4 on sink sinus zone. There are 32 bridging veins in"single type",accounting for 28%, 46 in Cluster"A total, accounting for about 38% , and 42 in"cluster type " accounting for about 36about ways of injecting the arachnoid mater, "cluster-type " is most , followed by "cluster-type " and "single type " is least. on Left and right brain hemisphere.2. Results of endoscopic anatomy on bridging veins into the superior sagittal sinus:bridging veins of openings forward direction are most (reverse the direction of blood flow dynamics) .sinus and posterior direction are mainly forward ,followed by the vector perpendicular sinus wall, and at least the back opening (along the direction of blood flow dynamics.) diameter of bridge vein ,narrow department and outflow segment were 3.0mm±0.8mm, 1.5mm±0.5mm, and 2.0mm±0.3mm.Forms, shapes and sizes of the bridge venous outflow are different,. There are respectively (6), crescent (6), two pocket-shaped (36), round pocket (72), etc., but round-bottomed pocket are (80%), crescent-shaped opening is least (5%) fibrous membrane are most, the total number of 50, covering most of the brain in the static source on the bridge; followed trabecular fiber cable (25), at least the lamellar fiber cable (15),located in the cavity of bridging vein and outflow segment larger diameter .Intimal ridge is 6 cases, according for10% .there are the bud-like shape for the month,bean-shaped, with its free edge thinner than the base of the intimal ridge to make bridge venovenous cavity more uneven.sizes and shapes of Arachnoid particle are mainly rice-like, as the small protrusions of arachnoid, in 10 cases of head,there are an average 30 Arachnoid particle each one Arachnoid particle.is distributed unevenly, both alone, but also focus on gathering, mostly concentrated in the middle of the bridge on the sagittal sinus venous flow exit.Conclusion:1.Bridging veins of Superior sagittal sinus group has different various shapes. way of flowing(main cluster), injection port location( middle of superior sagittal sinus anterior sinus sink), direction and angle of venous reflux(opposite to SSS blood flow and for acute angle)to a certain extent, affect the returning blood flow and speed of bridging veins and intracranial pressure.2.The outflow segment of the bridge has the typical characteristics of the morphological features for diameter(2.0mm±0.3mm) and structure of cord-like fibers and valve-like with its significantly different from the rest. of cerebral venous system.3.Bridging veins can regulate the cerebral venous return of its blood volume and speed ,according to shape of outflow segment opening"Valve"vale-like structural features and reversing into superior sagittal sinus.4.The outflow segment and Isthmus. bridging veins are morphologic basis for mechanism Of brain veins system in Intracranial pressure regulator.5.Endoscope in treatment and research for neural science has its own distinct advantages. |
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