The dural sac was filled with Ringer solution to a physiologic pressure of 15 cmH2O. Lumbar endoscopy was performed on 3 human cadavers at the L3鈥 4 level. Pressure changes were measured continuously at all sites and the effects of backflow-occlusion were monitored. Results...
NT is a fluid-filled space in the posterior neck of the foetus, between the skin and the soft tissue at the level of the cervical spine, as visualized by ultrasound [7]. NT normally increases with the foetal crown-rump length (CRL) [8]. The thickened NT represents one of the most se...
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