Department of Anaesthesia and Pain Medicine, Division of Imaging Services, Royal Perth Hospital, Perth, WA, Australia.
Anaesthesia. 2011 Jul;66(7):590-4. doi: 10.1111/j.1365-2044.2011.06766.x. Epub 2011 Jun 14.
We examined the association between cauda equina nerve root volume and sensory block height in 15 patients undergoing spinal anaesthesia with 0.5% glucose-free bupivacaine. Magnetic resonance imaging and a separate image segmentation program were used to calculate the volume of the nerve roots. Nerve root volume was also correlated with lumbosacral cerebrospinal fluid volume and with patients' physical characteristics. Nerve root volume correlated negatively with sensory block height (Spearman rho -0.61 (95% CI -0.85 to -0.14)) and body mass index (Spearman rho -0.66 (95% CI -0.87 to -0.24)) but positively with cerebrospinal fluid volume (Spearman rho 0.76 (95% CI 0.43-0.91)). Factors that are thought to influence cerebrospinal fluid volume, such as body mass index, might similarly affect the volume of the nerve roots. The size of the nerve roots may influence the spread of spinal anaesthesia.
我们在 15 名接受 0.5%无葡萄糖布比卡因脊麻的患者中检查了马尾神经根体积与感觉阻滞高度之间的关系。磁共振成像和单独的图像分割程序用于计算神经根的体积。还将神经根体积与腰骶部脑脊液体积以及患者的体格特征进行了相关性分析。神经根体积与感觉阻滞高度呈负相关（Spearman rho -0.61（95%CI-0.85 至-0.14））和体重指数（Spearman rho -0.66（95%CI-0.87 至-0.24）），但与脑脊液体积呈正相关（Spearman rho 0.76（95%CI 0.43-0.91））。被认为会影响脑脊液体积的因素（如体重指数）可能同样会影响神经根的体积。神经根的大小可能会影响脊麻的扩散。
