• Q Pang, C Wang, Y Hu, G Xu, L Zhang, X Hao, Q Zhang, and H Gregerson.
• Department of Neurosurgery, Second Affiliated Hospital of Shandong Medical University, Jinan 250033. Pangqi@jn-public.sd.cninfo.net
• Chin. Med. Sci. J. 2001 Mar 1; 16 (1): 19-22.

ObjectiveTo investigate the morphological properties of pig cerebral bridging vein.MethodsThe morphology and fibre arrangement of 15 cerebral bridging veins obtained from 7 Danish Yorkshire landrace pigs were observed.ResultsThere was a narrow region at the junction of the cerebral bridging veins and superior sagittal sinus termed "outflow cuff segment". The diameter and length of outflow cuff segment were much smaller and the thickness was higher than those of the cerebral bridging veins ( P < 0.01), and circumferential collagen fibres were most dense in the outflow cuff segment. The opening angle of the outflow cuff segment and the cerebral bridging veins were 115 +/- 4 degrees and 120 +/- 4 degrees ( P > 0.05).ConclusionsThere were differences in fibre arrangement and morphological properties between the outflow cuff segment and the cerebral bridging vein, just like a resistance valve, the outflow cuff segment may play an important role in stabilizing cerebral venous outflow and regulating intracranial pressure.

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