Awwad E E, Smith K R
Department of Radiology, St. Louis University Medical Center, MO 63110-0250, USA.
J Comput Assist Tomogr. 1999 Nov-Dec;23(6):969-75. doi: 10.1097/00004728-199911000-00029.
Our purpose was to determine what represents normal findings on MR examinations of the lumbar spine in the immediately postoperative period following lumbar laminectomy with retained Surgicel.
MR examinations were performed immediately following lumbar laminectomy in 10 patients referred for symptoms of spinal stenosis. All had Surgicel retained against the dura and were doing well postoperatively without suggestion of adverse symptoms. Images were obtained within 4 days of surgery, most within 24 h.
In 9 of 10 patients, severe dural tube compression was present, greater than that evident on preoperative studies.
Marked spinal canal compression can be a normal finding in the immediately postlaminectomy period in patients with retained Surgicel. There is a lack of correlation between apparent mass effect on the thecal sac and adverse effect. The MR appearance in such instances is not significant in the absence of compressive clinical symptomatology.
我们的目的是确定在保留 Surgicel 的腰椎椎板切除术后即刻进行的腰椎磁共振成像（MR）检查中，哪些表现属于正常发现。
对 10 例因腰椎管狭窄症状前来就诊的患者在腰椎椎板切除术后即刻进行 MR 检查。所有患者均保留 Surgicel 紧贴硬脊膜，术后恢复良好，无不良症状迹象。在术后 4 天内进行成像，大多数在 24 小时内。
10 例患者中有 9 例存在严重的硬膜囊受压，比术前检查所见更为明显。
在保留 Surgicel 的患者中，明显的椎管受压在椎板切除术后即刻可能是正常发现。对硬脊膜囊的明显占位效应与不良影响之间缺乏相关性。在没有压迫性临床症状的情况下，这种情况下的 MR 表现无显著意义。
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