Short-term predictive potential of quantitative assessment of spinal cord impairment in patients undergoing French-door
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RESEARCH ARTICLE
Open Access
Short-term predictive potential of quantitative assessment of spinal cord impairment in patients undergoing Frenchdoor Laminoplasty for degenerative cervical myelopathy: preliminary results of an exploratory study exploiting intraoperative ultrasound data Guoliang Chen1,2†, Jiachun Li1†, Fuxin Wei1, Qiao Ji3, Wenyuan Sui1, Bailing Chen2, Xuenong Zou2, Zuofeng Xu3*, Xizhe Liu2* and Shaoyu Liu1,2
Abstract Background: To study the correlation of neurological function in degenerative cervical myelopathy (DCM) patients with quantitative assessment of spinal cord compression and impairment by intraoperative ultrasound imaging (IOUSI). Methods: Twenty-three patients who underwent French-Door laminoplasty for multilevel DCM were followed for 6 months. Modified Japanese Orthopaedic Association (mJOA) score and cervical MRI were assessed before surgery and at postoperative 6 months. IOUS, used to guide decompression, were recorded. The anteroposterior diameter (APD) and the gray values of the IOUSI hyperechogenicity of the midsagittal IOUSI at the narrowest level and at the lesion-free level, and the APD and traverse diameter at the traverse maximum compression level of IOUSI were measured. Maximum spinal cord compression (MSCC), compression rate (CR), and IOUSI gray value ratio (Rgray) were calculated. The appearance of preoperative T2W MRI increased signal intensity (ISI), and the signal change rate (SCR) on postoperative T2W MRI of 9 patients were also measured and calculated, and compared with that of IOUSI hyperechogenicity. (Continued on next page)
* Correspondence: [email protected]; [email protected] † Guoliang Chen and Jiachun Li contributed equally to this work. 3 Department of Ultrasound, The Seventh Affiliated Hospital, Sun Yat-sen University, No.628 Zhenyuan Road, Shenzhen 518107, P.R. China 2 Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology /Orthopaedic Research Institute, Department of Spine Surgery, The First Affiliated Hospital, Sun Yat-sen University, No.58 Zhongshan 2nd Road, Guangzhou 510080, P.R. China Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons
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