Fig. 6From: A mysterious risk factor for bone cement leakage into the spinal canal through the Batson vein during percutaneous kyphoplasty: a case control studyTrend chart of the PVWCD/VBSD ratios. The PVWCD/VBSD ratios were maintained at approximately 0.16 from T6 to T12, significantly reduced from T12 to L1, and gradually reduced to almost 0 from L1 to L5Back to article page