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方法：笔者对８０例半椎板全椎板切除术后患者，进行３个月、６个月、１２个月ＣＴ脊髓造影跟踪观察。结果：认为医源性并发症是———椎管生理解剖缺失、有效防粘连受损，椎管外软组织凸入椎管内与硬脊膜神经根粘连形成纤维化、硬脊膜外疤痕挛缩，继发椎管狭窄。术后半年ＣＴ硬脊膜外纤维化密度阴影加重占腰腿痛组２７３％、脊髓造影，硬脊膜疤痕挛缩神经根袖充盈缺损加重２０４５％。结论：因而术中尽量保持椎管完整，减少硬脊膜外纤维化程度，提高手术率有直接意义。
Methods: The author of 80 cases of laminectomy patients after laminectomy, 3 months, 6 months, 12 months follow-up of CT scintigraphy. Results: iatrogenic complications were considered as the absence of anatomical spinal canal anatomy, the effective anti-adhesion damage, the soft tissue of spinal canal protruding into the spinal canal and the adhesion of dura nerve root to form fibrosis and extradural scar contracture , Secondary to spinal stenosis. Postoperative six months after CT epidural fibrosis density shadow accounted for 27.3% of the low back pain group, myelography, dura scar contracture nerve root sleeve filling defect increased 20 45%. Conclusion: Therefore, intraoperative spinal canal integrity as far as possible to reduce the degree of extradural fibrosis and improve the surgical rate has a direct meaning.