椎间盘高度

椎间盘高度（DHI/BDI）

1、DHI

椎间隙高度指数（Disc Height Index, DHI）[1]：椎间隙高度指数 = 侧位椎间隙前缘高度与后缘高度之和 / 相邻椎体高度之和，正常值为0.188。正常情况椎间盘的厚度占椎体高度的1/4。 

有学者[5-7]使用 DHI 和 %DHI 评价大鼠尾椎间盘，计算公式如下（Figure 2[5]）：

• %DHI = 术后DHI / 术前DHI
• DHI = 椎间隙高度 / 相邻椎体高度之和

也有学者[9]使用其他公式计算 DHI 评价大鼠尾椎间盘（图2）

2、BDI

BDI（Bradner Disc Index）[2]：BDI = 椎间隙高度(B) / 下位椎体高度(A) 。

有学者[3,4]使用 BDI 评估兔腰椎间盘（图[3]）。

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参考文献

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[8]徐浩伟,王善金,易宇阳等.大鼠尾椎间盘退变造模器械的研发与应用[J].中国脊柱脊髓杂志,2020,30(05):447-453.