Dynamic Changes of Cauda Equina Motion Before and After Decompressive Laminectomy for Lumbar Spinal Stenosis With Redundant Nerve Roots: Cauda Equina Activation Sign

• DOI: 10.1177/2192568218821344
• Publication Date: 2019-02-14T04:33:35Z
• Authors: Yosuke Kawasaki; Atsushi Seichi; Liuzhe Zhang; Shoichiro Tani; Atsushi Kimura
• Keywords: Cauda equina; Cauda Equina Syndrome

Study Design: Cross-sectional observational study (consecutive case series). Objectives: The aim of this was to define a criterion for achieving successful decompression lumbar spinal stenosis (LSS) using intraoperative ultrasonography (IOUS) and investigate the pathogenesis redundant nerve roots (RNRs) based on ultrasonographic findings. Methods: A total 100 LSS patients (71 males, 29 females, mean age, 71 ± 8 years) with RNRs were enrolled as subjects in study. IOUS performed evaluate pulsatile motion cauda equina (PMCE) just before after decompressive laminectomy. To determine status equina, findings classified into 3 types basis presence or absence PMCE: type 1, predecompression PMCE (−) postdecompression (+); 2, pre- 3, (−). also investigated Results: Around stenosis, almost always absent appeared (type 1 94 patients, 2 6, 0). showed that, decompression, held at could not pulsate beyond stenotic site, recovered craniocaudal direction, leading resolution RNRs. Conclusions: emergence can be sign LSS. Ultrasonographic support notion that disturbance around is basic component